メインストリートキャピタルの四半期報告

Table of contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)


þ			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2025


o			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from: to

Commission File Number: 814-00746

Main Street Capital Corporation

(Exact name of registrant as specified in its charter)


Maryland			41-2230745
(State or other jurisdiction of incorporation or organization)			(I.R.S. Employer Identification No.)
1300 Post Oak Boulevard, 8th Floor Houston, TX			77056
(Address of principal executive offices)			(Zip Code)

(713) 350-6000

(Registrant’s telephone number, including area code)

n/a

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class

Trading Symbol

Name of Each Exchange on Which

Registered

Common Stock, par value $0.01 per share

MAIN

New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes þ No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes þ No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer

Accelerated filer

Non-accelerated filer

Smaller reporting company

Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No þ

The number of shares outstanding of the issuer’s common stock as of August 7, 2025 was 89,430,382.

Table of contents


	TABLE OF CONTENTS
	PART I
	FINANCIAL INFORMATION
Item 1.	Consolidated Financial Statements
	Consolidated Balance Sheets—June 30 , 2025 (unaudited) and December 31, 2024	1
	Consolidated Statements of Operations (unaudited)—Three and six months ended June 30 , 202 5 and 2024	2
	Consolidated Statements of Changes in Net Assets (unaudited)—Three and six months ended June 30 , 2025 and 2024	3
	Consolidated Statements of Cash Flows (unaudited)—Six months ended June 30 , 2025 and 2024	4
	Consolidated Schedule of Investments (unaudited)—June 30 , 2025	5
	Consolidated Schedule of Investments—December 31, 2024	35
	Notes to Consolidated Financial Statements (unaudited)	65
	Consolidated Schedules of Investments in and Advances to Affiliates (unaudited)—Six months ended June 30 , 2025 and 2024	112
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	131
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	152
Item 4.	Controls and Procedures	153
	PART II
	OTHER INFORMATION
Item 1.	Legal Proceedings	154
Item 1A.	Risk Factors	154
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	154
Item 5.	Other Information	154
Item 6.	Exhibits	155
	Signatures	156

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Balance Sheets

(in thousands, except shares and per share amounts)


	June 30, 2025		December 31, 2024
	(Unaudited)
ASSETS
Investments at fair value:
Control investments (cost: $1,561,120 and $1,415,970 as of June 30, 2025 and December 31, 2024, respectively)	$	2,295,565	$	2,087,890
Affiliate investments (cost: $790,583 and $743,441 as of June 30, 2025 and December 31, 2024, respectively)	856,226		846,798
Non‑Control/Non‑Affiliate investments (cost: $2,001,002 and $2,077,901 as of June 30, 2025 and December 31, 2024, respectively)	1,941,279		1,997,981
Total investments (cost: $4,352,705 and $4,237,312 as of June 30, 2025 and December 31, 2024, respectively)	5,093,070		4,932,669
Cash and cash equivalents	86,984		78,251
Interest and dividend receivable and other assets	92,509		98,084

Deferred financing costs (net of accumulated amortization of $16,084 and $14,592 as of June 30, 2025 and December 31, 2024, respectively)	15,203		12,337
Total assets	$	5,287,766	$	5,121,341
LIABILITIES
Credit Facilities	$	477,000	$	384,000
July 2026 Notes (par: $500,000 as of both June 30, 2025 and December 31, 2024)	499,452		499,188
June 2027 Notes (par: $400,000 as of both June 30, 2025 and December 31, 2024)	399,425		399,282
March 2029 Notes (par: $350,000 as of both June 30, 2025 and December 31, 2024)	347,361		347,002

SBIC debentures (par: $350,000 as of both June 30, 2025 and December 31, 2024)	344,005		343,417
December 2025 Notes (par: $150,000 as of both June 30, 2025 and December 31, 2024)	149,741		149,482

Accounts payable and other liabilities	50,025		69,631
Interest payable	23,717		23,290
Dividend payable	22,767		22,100
Deferred tax liability, net	90,056		86,111
Total liabilities	2,403,549		2,323,503
Commitments and contingencies (Note K)
NET ASSETS
Common stock, $0.01 par value per share (150,000,000 shares authorized; 89,275,113 and 88,398,713 shares issued and outstanding as of June 30, 2025 and December 31, 2024, respectively)	893		884
Additional paid‑in capital	2,429,817		2,394,492




Total undistributed earnings	453,507		402,462
Total net assets	2,884,217		2,797,838
Total liabilities and net assets	$	5,287,766	$	5,121,341
NET ASSET VALUE PER SHARE	$	32.30	$	31.65

The accompanying notes are an integral part of these consolidated financial statements

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Statements of Operations

(in thousands, except shares and per share amounts)

(Unaudited)


	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
INVESTMENT INCOME:
Interest, fee and dividend income:
Control investments	$	60,212	$	51,318	$	116,454	$	102,437
Affiliate investments	25,767		23,201		49,501		40,928
Non‑Control/Non‑Affiliate investments	57,994		57,635		115,064		120,394
Total investment income	143,973		132,154		281,019		263,759
EXPENSES:
Interest	(32,519)		(29,161)		(63,687)		(55,937)
Compensation	(12,677)		(11,322)		(24,153)		(23,581)
General and administrative	(5,919)		(5,375)		(11,005)		(9,595)
Share‑based compensation	(5,416)		(4,883)		(10,258)		(8,986)
Expenses allocated to the External Investment Manager	5,892		5,887		11,228		11,446
Total expenses	(50,639)		(44,854)		(97,875)		(86,653)
NET INVESTMENT INCOME BEFORE TAXES	93,334		87,300		183,144		177,106
Excise tax expense	(818)		(272)		(2,159)		(1,193)
Federal and state income and other tax expenses	(4,333)		(3,129)		(6,905)		(5,583)
NET INVESTMENT INCOME	88,183		83,899		174,080		170,330
NET REALIZED GAIN (LOSS):
Control investments	(2,998)		(361)		(2,976)		(352)
Affiliate investments	55,647		7,863		57,711		753
Non‑Control/Non‑Affiliate investments	(229)		(4,088)		(31,860)		(9,355)

Total net realized gain (loss)	52,420		3,414		22,875		(8,954)
NET UNREALIZED APPRECIATION (DEPRECIATION):
Control investments	33,154		5,589		33,555		37,659
Affiliate investments	(47,745)		9,502		(8,742)		15,428
Non‑Control/Non‑Affiliate investments	(4,360)		7,953		19,426		10,606

Total net unrealized appreciation (depreciation)	(18,951)		23,044		44,239		63,693
Income tax benefit (provision) on net realized gain (loss) and net unrealized appreciation (depreciation)	882		(7,669)		(2,578)		(15,234)
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	$	122,534	$	102,688	$	238,616	$	209,835
NET INVESTMENT INCOME PER SHARE—BASIC AND DILUTED	$	0.99	$	0.97	$	1.96	$	1.99
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS PER SHARE—BASIC AND DILUTED	$	1.37	$	1.19	$	2.68	$	2.45
WEIGHTED-AVERAGE SHARES OUTSTANDING—BASIC AND DILUTED	89,258,390		86,194,092		88,986,215		85,666,311

The accompanying notes are an integral part of these consolidated financial statements

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Statements of Changes in Net Assets

(in thousands, except shares)

(Unaudited)


	Common Stock			Additional Paid-In Capital		Total Undistributed (Overdistributed) Earnings		Total Net Asset Value
	Number of Shares	Par Value
Balances as of December 31, 2023	84,833,002	$	848	$	2,270,549	$	206,002	$	2,477,399
Public offering of common stock, net of offering costs	128,942	1		5,695		—		5,696
Share‑based compensation	—	—		4,103		—		4,103
Purchase of vested stock for employee payroll tax withholding	(295)	—		(14)		—		(14)
Dividend reinvestment	186,985	2		8,439		—		8,441
Amortization of directors’ deferred compensation	—	—		102		—		102
Issuance of restricted stock, net of forfeited shares	14,999	—		—		—		—
Net increase in net assets resulting from operations	—	—		—		107,147		107,147

Dividends to stockholders	—	—		168		(87,072)		(86,904)
Balances as of March 31, 2024	85,163,633	$	851	$	2,289,042	$	226,077	$	2,515,970
Public offering of common stock, net of offering costs	874,309	9		42,208		—		42,217
Share‑based compensation	—	—		4,883		—		4,883
Purchase of vested stock for employee payroll tax withholding	(154,751)	(2)		(7,320)		—		(7,322)
Dividend reinvestment	179,511	2		8,786		—		8,788
Amortization of directors’ deferred compensation	—	—		106		—		106
Issuance of restricted stock, net of forfeited shares	489,804	5		(5)		—		—
Net increase in net assets resulting from operations	—	—		—		102,688		102,688

Dividends to stockholders	—	—		179		(88,553)		(88,374)
Balances as of June 30, 2024	86,552,506	$	865	$	2,337,879	$	240,212	$	2,578,956





















Balances as of December 31, 2024	88,400,391	$	884	$	2,394,492	$	402,462	$	2,797,838
Public offering of common stock, net of offering costs	89,091	1		5,197		—		5,198
Share‑based compensation	—	—		4,842		—		4,842

Dividend reinvestment	156,749	2		9,085		—		9,087
Amortization of directors’ deferred compensation	—	—		108		—		108
Issuance of restricted stock, net of forfeited shares	13,366	—		—		—		—
Net increase in net assets resulting from operations	—	—		—		116,082		116,082

Dividends to stockholders	—	—		190		(93,212)		(93,022)
Balances as of March 31, 2025	88,659,597	$	887	$	2,413,914	$	425,332	$	2,840,133
Public offering of common stock, net of offering costs	195,454	2		10,831		—		10,833
Share‑based compensation	—	—		5,416		—		5,416
Purchase of vested stock for employee payroll tax withholding	(177,024)	(2)		(10,013)		—		(10,015)
Dividend reinvestment	167,705	2		9,377		—		9,379
Amortization of directors’ deferred compensation	—	—		97		—		97
Issuance of restricted stock, net of forfeited shares	436,863	4		(4)		—		—
Net increase in net assets resulting from operations	—	—		—		122,534		122,534

Dividends to stockholders	—	—		199		(94,359)		(94,160)
Balances as of June 30, 2025	89,282,595	$	893	$	2,429,817	$	453,507	$	2,884,217

The accompanying notes are an integral part of these consolidated financial statements

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Statements of Cash Flows

(in thousands)

(Unaudited)


	Six Months Ended June 30,
	2025		2024
CASH FLOWS FROM OPERATING ACTIVITIES
Net increase in net assets resulting from operations	$	238,616	$	209,835
Adjustments to reconcile net increase in net assets resulting from operations to net cash provided by (used in) operating activities:
Investments in portfolio companies	(645,993)		(915,212)
Proceeds from sales and repayments of debt investments in portfolio companies	472,012		442,596
Proceeds from sales and return of capital of equity investments in portfolio companies	101,271		29,724
Net unrealized appreciation	(44,239)		(63,693)
Net realized (gain) loss	(22,875)		8,954
Accretion of unearned income	(10,406)		(10,560)
Payment-in-kind interest	(7,297)		(9,116)
Cumulative dividends	(1,936)		(1,026)
Share-based compensation expense	10,258		8,986
Amortization of deferred financing costs	3,105		2,294
Deferred taxes	3,945		18,282
Changes in other assets and liabilities:
Interest and dividend receivable and other assets	1,813		(27,282)
Interest payable	427		8,798
Accounts payable and other liabilities	(19,401)		(10,399)
Deferred fees and other	2,825		3,268
Net cash provided by (used in) operating activities	82,125		(304,551)

CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from public offering of common stock, net of offering costs	16,031		47,913


Proceeds from public offering of March 2029 Notes	—		350,000
Proceeds from public offering of June 2027 Notes	—		300,000


Dividends paid	(168,050)		(157,212)

Repayments of SBIC debentures	—		(63,800)


Redemption of May 2024 Notes	—		(450,000)
Proceeds from Credit Facilities	607,000		1,395,000
Repayments on Credit Facilities	(514,000)		(1,130,000)
Payment of deferred financing costs	(4,358)		(9,625)
Purchases of vested stock for employee payroll tax withholding	(10,015)		(7,336)

Net cash provided by (used in) financing activities	(73,392)		274,940

Net increase (decrease) in cash and cash equivalents	8,733		(29,611)
CASH AND CASH EQUIVALENTS AS OF BEGINNING OF PERIOD	78,251		60,083
CASH AND CASH EQUIVALENTS AS OF END OF PERIOD	$	86,984	$	30,472

Supplemental cash flow disclosures:
Interest paid	$	60,068	$	44,694
Taxes paid	$	16,936	$	6,425


Non-cash financing activities:
Value of shares issued pursuant to the dividend reinvestment plan	$	18,466	$	17,229

The accompanying notes are an integral part of these consolidated financial statements

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)		Cost (4)		Fair Value (18)

Control Investments (5)
American Nuts, LLC	(10)	Roaster, Mixer and Packager of Bulk Nuts and Seeds
			Secured Debt	(9)	3/25/2025		12.95%	SF+	8.50%	12.95%	3/28/2028	$	7,653	$	7,653	$	7,653
			Secured Debt	(9)	3/25/2025		12.95%	SF+	8.50%	12.95%	3/28/2028	7,653		7,653		7,653
			Preferred Equity		3/25/2025	26,638								8,970		7,790
														24,276		23,096
Analytical Systems Keco Holdings, LLC		Manufacturer of Liquid and Gas Analyzers
			Secured Debt	(25)	8/16/2019						8/16/2029	—		—		—
			Secured Debt		8/16/2019		17.50%				8/16/2029	3,995		3,954		3,954
			Preferred Member Units		5/20/2021	2,427								2,427		5,340
			Preferred Member Units		8/16/2019	3,200								3,200		—
			Warrants	(27)	8/16/2019	420					8/16/2029			316		—
														9,897		9,294
ASC Interests, LLC		Recreational and Educational Shooting Facility
			Secured Debt	(17)	12/31/2019		13.00%				7/31/2024	400		400		400
			Secured Debt	(17)	8/1/2013		13.00%				7/31/2024	1,578		1,578		1,428
			Preferred Member Units		6/28/2023	178								178		—
			Member Units		8/1/2013	1,500								1,500		—
														3,656		1,828
Barfly Ventures, LLC	(10)	Casual Restaurant Group
			Secured Debt		10/15/2020		7.00%				10/31/2026	711		711		711
			Member Units	(8)	10/26/2020	37								1,584		6,810
														2,295		7,521
Batjer TopCo, LLC		HVAC Mechanical Contractor
			Secured Debt	(25)	3/7/2022						3/7/2027	—		(3)		(3)
			Secured Debt		3/7/2022		10.00%				3/7/2027	270		270		270
			Secured Debt		3/7/2022		10.00%				3/7/2027	10,575		10,540		10,540
			Preferred Stock	(8)	3/7/2022	4,073								4,095		6,980
														14,902		17,787
BDB Holdings, LLC		Casual Restaurant Group
			Secured Debt		2/24/2025		12.00%				2/27/2027	420		420		420
			Preferred Equity		11/4/2024	18,756,995								19,537		17,860
														19,957		18,280
Bolder Panther Group, LLC		Consumer Goods and Fuel Retailer
			Secured Debt	(9) (22)	12/31/2020		11.67%	SF+	7.29%		10/31/2027	101,046		100,735		101,046
			Class B Preferred Member Units	(8)	12/31/2020	140,000	8.00%							14,000		30,300
														114,735		131,346
Brewer Crane Holdings, LLC		Provider of Crane Rental and Operating Services

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)	Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

		Secured Debt	(9)	1/9/2018		14.48%	SF+	10.00%		12/31/2025	5,016	5,016	5,016
		Preferred Member Units	(8)	1/9/2018	2,950							4,280	3,260
												9,296	8,276
Bridge Capital Solutions Corporation	Financial Services and Cash Flow Solutions Provider
		Warrants	(27)	7/25/2016	82					7/25/2026		2,132	—
		Preferred Member Units	(8) (29)	7/25/2016	17,742							1,000	—
												3,132	—
Café Brazil, LLC	Casual Restaurant Group
		Member Units	(8)	6/9/2006	1,233							1,742	1,010

California Splendor Holdings LLC	Processor of Frozen Fruits
		Secured Debt	(25)	3/15/2024						8/28/2028	—	(16)	(16)
		Secured Debt		3/30/2018		14.00%				8/28/2028	25,800	25,766	25,766
		Preferred Member Units	(8)	7/31/2019	8,671	15.00%			15.00%			11,732	11,732
		Preferred Member Units	(8)	3/30/2018	8,729							16,402	15,275
												53,884	52,757
CBT Nuggets, LLC	Produces and Sells IT Training Certification Videos
		Member Units	(8)	6/1/2006	416							1,300	48,960

Centre Technologies Holdings, LLC	Provider of IT Hardware Services and Software Solutions
		Secured Debt	(9) (25)	1/4/2019			SF+	10.00%		1/4/2028	—	—	—
		Secured Debt	(9)	11/29/2024		14.48%	SF+	10.00%		1/4/2028	24,464	24,431	24,464
		Preferred Member Units		1/4/2019	13,883							6,386	16,550
												30,817	41,014
Chamberlin Holding LLC	Roofing and Waterproofing Specialty Contractor
		Secured Debt	(9) (25)	2/26/2018			SF+	6.00%		2/26/2026	—	(60)	—
		Secured Debt	(9)	2/26/2018		12.49%	SF+	8.00%		2/26/2026	18,820	18,814	18,820
		Member Units	(8)	2/26/2018	4,347							11,440	32,290
		Member Units	(8) (29)	11/2/2018	1,047,146							1,773	3,690
												31,967	54,800
Charps, LLC	Pipeline Maintenance and Construction
		Unsecured Debt		8/26/2020		14.00%				1/31/2030	5,694	5,214	5,694
		Preferred Member Units	(8)	2/3/2017	1,829							1,963	15,360
												7,177	21,054
Clad-Rex Steel, LLC	Specialty Manufacturer of Vinyl-Clad Metal
		Secured Debt	(25)	10/28/2022						1/15/2027	—	—	—
		Secured Debt		12/20/2016		9.00%				1/15/2027	6,280	6,248	6,280

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt		12/20/2016		10.00%				12/20/2036	951	944	951
			Member Units	(8)	12/20/2016	717							7,280	12,290
			Member Units	(29)	12/20/2016	800							509	1,270
													14,981	20,791
Cody Pools, Inc.		Designer of Residential and Commercial Pools
			Secured Debt		3/6/2020		12.50%				12/17/2026	3,772	3,763	3,772
			Secured Debt		3/6/2020		12.50%				12/17/2026	37,080	37,066	37,080
			Preferred Member Units	(8) (29)	3/6/2020	587							8,317	67,150
													49,146	108,002
Colonial Electric Company LLC		Provider of Electrical Contracting Services
			Secured Debt	(25)	3/31/2021						3/31/2026	—	—	—
			Secured Debt		3/31/2021		12.00%				3/31/2026	11,494	11,476	11,494
			Preferred Member Units	(8)	3/31/2021	17,280							7,680	15,270
													19,156	26,764
CompareNetworks Topco, LLC		Internet Publishing and Web Search Portals
			Secured Debt	(9)	1/29/2019		13.48%	SF+	9.00%		1/29/2028	2,745	2,704	2,704
			Preferred Member Units		1/29/2019	2,250							3,520	9,630
													6,224	12,334
Compass Systems & Sales, LLC		Designer of End-to-End Material Handling Solutions
			Secured Debt	(25)	11/22/2023						11/22/2028	—	(18)	(18)
			Secured Debt		11/22/2023		13.50%				11/22/2028	17,200	17,084	16,944
			Preferred Equity		11/22/2023	7,454							7,454	7,454
													24,520	24,380
Copper Trail Fund Investments	(12) (13)	Investment Partnership
			LP Interests (CTMH, LP)	(30)	7/17/2017	38.75%							515	515

Cybermedia Technologies, LLC		IT and Digital Services Provider
			Secured Debt	(25)	5/5/2023						5/5/2028	—	—	—
			Secured Debt		5/5/2023		13.00%				5/5/2028	27,210	27,054	26,463
			Preferred Member Units		5/5/2023	556							15,000	—
			Preferred Equity		4/1/2025	2,400,000							2,400	3,400
													44,454	29,863
Datacom, LLC		Technology and Telecommunications Provider
			Secured Debt		3/1/2022		7.50%				12/31/2025	675	674	674
			Secured Debt		3/31/2021		10.00%				12/31/2025	7,947	7,881	7,192
			Preferred Member Units		3/31/2021	9,360							2,970	—
													11,525	7,866

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)	Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Digital Products Holdings LLC	Designer and Distributor of Consumer Electronics
		Secured Debt	(9)	4/1/2018		14.38%	SF+	10.00%		4/27/2026	11,957	11,924	11,785
		Preferred Member Units	(8)	4/1/2018	3,857							9,501	9,835
												21,425	21,620
Direct Marketing Solutions, Inc.	Provider of Omni-Channel Direct Marketing Services
		Secured Debt	(25)	2/13/2018						2/13/2026	—	(17)	—
		Secured Debt		12/27/2022		14.00%				2/13/2026	23,082	23,060	23,082
		Preferred Stock		2/13/2018	8,400							8,400	18,470
												31,443	41,552
Doral Holdings, LLC	Machinery Moving, Rigging and Millwrighting Provider
		Secured Debt	(25)	5/20/2025						5/20/2030	—	—	—
		Secured Debt		5/20/2025		13.00%				5/20/2030	29,500	29,215	29,215
		Preferred Equity		5/20/2025	13,000							13,000	13,000
												42,215	42,215
Elgin AcquireCo, LLC	Manufacturer and Distributor of Engine and Chassis Components
		Secured Debt	(9) (25)	10/3/2022			SF+	6.00%		10/3/2026	—	(4)	(4)
		Secured Debt		10/3/2022		12.00%				10/3/2027	17,576	17,497	17,497
		Secured Debt		10/3/2022		9.00%				10/3/2052	6,239	6,182	6,182
		Common Stock		10/3/2022	285							5,726	5,160
		Common Stock	(29)	10/3/2022	939							1,558	3,160
												30,959	31,995
Flame King Holdings, LLC	Propane Tank and Accessories Distributor
		Secured Debt		6/30/2025		12.00%				6/30/2030	66,000	65,351	65,351
		Preferred Equity	(8)	10/29/2021	9,360							10,400	41,370
												75,751	106,721
Gamber-Johnson Holdings, LLC	Manufacturer of Ruggedized Computer Mounting Systems
		Secured Debt	(9) (25) (34)	6/24/2016			SF+	7.50%		1/1/2028	—	—	—
		Secured Debt	(9) (34)	11/22/2024		11.50%	SF+	7.50%		1/1/2028	72,326	72,211	72,326
		Member Units	(8)	6/24/2016	9,042							17,692	114,750
												89,903	187,076
Garreco, LLC	Manufacturer and Supplier of Dental Products
		Member Units	(8)	7/15/2013	1,200							1,200	1,830

GRT Rubber Technologies LLC	Manufacturer of Engineered Rubber Products
		Secured Debt		12/21/2018		10.48%	SF+	6.00%		10/29/2026	3,146	3,142	3,146
		Secured Debt		12/19/2014		12.48%	SF+	8.00%		10/29/2026	40,493	40,430	40,493

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Member Units	(8)	12/19/2014	5,879							13,065	46,820
													56,637	90,459
Gulf Publishing Holdings, LLC		Energy Industry Focused Media and Publishing
			Secured Debt	(9) (14) (25)	9/29/2017			SF+	9.50%		7/1/2027	—	—	—
			Secured Debt	(14)	7/1/2022		12.50%				7/1/2027	2,400	2,194	1,878
			Preferred Equity		7/1/2022	63,720							5,600	—
			Member Units		4/29/2016	3,681							3,681	—
													11,475	1,878
Harris Preston Fund Investments	(12) (13)	Investment Partnership
			LP Interests (2717 MH, L.P.)	(30)	10/1/2017	49.26%							1,158	1,686
			LP Interests (2717 HPP-MS, L.P.)	(30)	3/11/2022	49.26%							256	447
			LP Interests (2717 GRE-LP, L.P.)	(30)	4/18/2024	43.05%							441	441
			LP Interests (423 COR, L.P.)	(30)	6/2/2022	26.89%							2,900	5,168
													4,755	7,742
Harrison Hydra-Gen, Ltd.		Manufacturer of Hydraulic Generators
			Common Stock	(8)	6/4/2010	107,456							718	7,270

IG Investor, LLC		Military and Other Tactical Gear
			Secured Debt		6/21/2023		13.00%				6/21/2028	1,600	1,575	1,600
			Secured Debt		6/21/2023		13.00%				6/21/2028	35,064	34,855	35,064
			Common Equity		6/21/2023	14,400							14,400	19,560
													50,830	56,224
Jensen Jewelers of Idaho, LLC		Retail Jewelry Store
			Secured Debt	(9) (25)	8/29/2017			P+	6.75%		11/14/2026	—	—	—
			Secured Debt	(9)	11/14/2006		14.25%	P+	6.75%		11/14/2026	1,178	1,178	1,178
			Member Units	(8)	11/14/2006	627							811	11,540
													1,989	12,718
JorVet Holdings, LLC		Supplier and Distributor of Veterinary Equipment and Supplies
			Secured Debt		3/28/2022		12.00%				3/28/2027	23,321	23,240	23,240
			Preferred Equity	(8)	3/28/2022	109,926							10,993	13,480
													34,233	36,720
KBK Industries, LLC		Manufacturer of Specialty Oilfield and Industrial Products
			Secured Debt		2/24/2023		9.50%				2/24/2028	8,700	8,649	8,700
			Member Units	(8)	1/23/2006	325							783	25,180
													9,432	33,880

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Kickhaefer Manufacturing Company, LLC		Precision Metal Parts Manufacturing
			Secured Debt		10/31/2018		12.00%				10/31/2026	13,399	13,391	13,391
			Secured Debt		10/31/2018		9.00%				10/31/2048	3,935	3,903	3,903
			Preferred Equity		10/31/2018	581							12,240	14,280
			Member Units	(8) (29)	10/31/2018	800							992	2,710
													30,526	34,284
Metalforming Holdings, LLC		Distributor of Sheet Metal Folding and Metal Forming Equipment
			Secured Debt	(25)	10/19/2022						10/19/2025	—	(4)	—
			Secured Debt		10/19/2022		9.75%				10/19/2027	18,564	18,479	18,564
			Preferred Equity	(8)	10/19/2022	5,915,585	8.00%			8.00%			5,916	6,035
			Common Stock	(8)	10/19/2022	1,537,219							1,537	6,760
													25,928	31,359
MS Private Loan Fund I, LP	(12) (13)	Investment Partnership
			Secured Debt	(9)	1/26/2021		7.38%	SF+	3.00%		3/24/2026	4,000	4,000	4,000
			LP Interests	(8) (30)	1/26/2021	14.51%							14,250	13,526
													18,250	17,526
MS Private Loan Fund II, LP	(12) (13)	Investment Partnership
			Secured Debt	(9) (25)	9/5/2023			SF+	3.00%		3/5/2029	—	(97)	(97)
			LP Interests	(8) (30)	9/5/2023	13.22%							9,000	9,394
													8,903	9,297
MSC Adviser I, LLC	(16)	Third Party Investment Advisory Services
			Member Units	(8)	11/22/2013	100%							29,500	272,600

MSC Income Fund, Inc.	(12) (13)	Business Development Company
			Common Equity	(8)	5/2/2022	1,377,952							21,545	21,557

MVI MSO, LLC		Vascular Practice Specializing in Comprehensive Vein and Artery Diagnosis and Treatment
			Secured Debt		3/28/2025		13.00%				3/28/2030	9,850	9,758	9,758
			Preferred Equity		3/28/2025	270							2,700	2,700
													12,458	12,458
Mystic Logistics Holdings, LLC		Logistics and Distribution Services Provider for Large Volume Mailers
			Secured Debt	(25)	8/18/2014						1/31/2027	—	—	—
			Secured Debt		8/18/2014		10.00%				1/31/2027	5,746	5,734	5,746
			Common Stock	(8)	8/18/2014	5,873							2,720	26,780
													8,454	32,526
NAPCO Precast, LLC		Precast Concrete Manufacturing
			Member Units	(8)	1/31/2008	2,955							2,975	11,820

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)	Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Nello Industries Investco, LLC	Manufacturer of Steel Poles and Towers For Critical Infrastructure
		Secured Debt		6/4/2024		13.50%				6/4/2029	27,200	26,986	26,986
		Preferred Equity	(8)	6/4/2024	364,579							12,120	18,240
												39,106	45,226
NexRev LLC	Provider of Energy Efficiency Products & Services
		Preferred Member Units	(8)	2/28/2018	103,144,186							8,213	12,390

NRP Jones, LLC	Manufacturer of Hoses, Fittings and Assemblies
		Secured Debt		12/21/2017		12.00%				9/18/2028	2,191	2,184	2,184
		Preferred Equity		12/8/2011	495,000							482	1,238
		Member Units		12/22/2011	74,761							114	45
		Member Units		12/22/2011	74,761							3,823	1,095
		Common Equity	(29)	6/20/2025	1,200,000							1,200	1,200
												7,803	5,762
NuStep, LLC	Designer, Manufacturer and Distributor of Fitness Equipment
		Secured Debt	(9) (17)	1/31/2017		10.98%	SF+	6.50%		1/31/2025	2,400	2,400	2,400
		Secured Debt	(17)	1/31/2017		12.00%				1/31/2025	18,440	18,440	18,440
		Preferred Member Units		11/2/2022	2,400							2,785	6,000
		Preferred Member Units		1/31/2017	486							11,866	12,200
												35,491	39,040
OMi Topco, LLC	Manufacturer of Overhead Cranes
		Secured Debt		8/31/2021		12.00%				12/31/2029	19,000	18,956	19,000
		Preferred Member Units	(8)	4/1/2008	900							1,080	77,620
												20,036	96,620
Orttech Holdings, LLC	Distributor of Industrial Clutches, Brakes and Other Components
		Secured Debt	(9) (25)	7/30/2021			SF+	11.00%		7/31/2026	—	—	—
		Secured Debt	(9)	7/30/2021		15.48%	SF+	11.00%		7/31/2026	21,160	21,114	21,160
		Preferred Stock	(29)	7/30/2021	10,000							10,000	13,450
												31,114	34,610
Pinnacle TopCo, LLC	Manufacturer and Distributor of Garbage Can Liners, Poly Bags, Produce Bags, and Other Similar Products
		Secured Debt	(25)	12/21/2023						12/31/2028	—	(11)	—
		Secured Debt		12/21/2023		13.00%				12/31/2028	27,840	27,648	27,840
		Preferred Equity	(8)	12/21/2023	440							12,540	19,530
												40,177	47,370
PPL RVs, Inc.	Recreational Vehicle Dealer
		Secured Debt	(9) (25)	10/31/2019			SF+	7.00%		11/15/2027	—	(5)	—

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)	Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

		Secured Debt	(9)	11/15/2016		11.48%	SF+	7.00%		11/15/2027	15,328	15,243	15,328
		Common Stock	(8)	6/10/2010	2,000							2,150	18,250
		Common Stock	(8) (29)	6/14/2022	238,421							238	575
												17,626	34,153
Principle Environmental, LLC	Noise Abatement Service Provider
		Secured Debt		7/1/2011		13.00%				11/15/2026	4,897	4,870	4,870
		Preferred Member Units	(8)	2/1/2011	21,806							5,709	13,790
		Common Stock		1/27/2021	1,037							1,200	660
												11,779	19,320
Quality Lease Service, LLC	Provider of Rigsite Accommodation Unit Rentals and Related Services
		Member Units		6/8/2015	1,000							7,546	460

River Aggregates, LLC	Processor of Construction Aggregates
		Member Units	(29)	12/20/2013	1,500							369	9,590

Robbins Bros. Jewelry, Inc.	Bridal Jewelry Retailer
		Secured Debt	(14) (25)	12/15/2021					10.00%	12/15/2026	—	(51)	(51)
		Secured Debt	(14)	12/15/2021		12.50%			10.00%	12/15/2026	33,660	32,198	14,135
		Preferred Equity		12/15/2021	11,070							11,070	—
												43,217	14,084
Tedder Industries, LLC	Manufacturer of Firearm Holsters and Accessories
		Secured Debt	(14) (17)	8/31/2018		12.00%			12.00%	8/31/2023	1,840	1,821	1,644
		Secured Debt	(14) (17)	8/31/2018		12.00%			12.00%	8/31/2023	15,200	15,045	3,452
		Preferred Member Units		8/28/2023	6,605							661	—
		Preferred Member Units		2/1/2023	5,643							564	—
		Preferred Member Units		8/31/2018	544							9,245	—
												27,336	5,096
Televerde, LLC	Provider of Telemarketing and Data Services
		Preferred Stock		1/26/2022	248							718	1,794
		Member Units	(8)	1/6/2011	460							1,290	5,021
												2,008	6,815
Trantech Radiator Topco, LLC	Transformer Cooling Products and Services
		Secured Debt	(25)	5/31/2019						5/31/2027	—	(1)	(1)
		Secured Debt		5/31/2019		13.50%				5/31/2027	7,920	7,869	7,869
		Common Stock	(8)	5/31/2019	615							4,655	9,460
												12,523	17,328
Victory Energy Operations, LLC	Provider of Industrial and Commercial Combustion Systems
		Secured Debt		10/3/2024		13.00%				10/3/2029	1,723	1,694	1,694

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)		Cost (4)		Fair Value (18)

			Secured Debt		10/3/2024		13.00%				10/3/2029	48,251		47,841		47,841
			Preferred Equity	(8)	10/3/2024	51,421								22,471		22,471
														72,006		72,006
Volusion, LLC		Provider of Online Software-as-a-Service eCommerce Solutions
			Secured Debt	(17)	3/31/2023		10.00%				3/31/2025	2,100		2,100		2,100
			Preferred Member Units		3/31/2023	5,097,595								2,882		4,280
			Preferred Member Units		3/31/2023	142,512								—		—
			Preferred Member Units		1/26/2015	4,876,670								14,000		—
			Common Stock		3/31/2023	1,802,780								2,576		—
														21,558		6,380
VVS Holdco LLC		Omnichannel Retailer of Animal Health Products
			Secured Debt	(9) (25)	12/1/2021			SF+	6.00%		12/1/2025	—		—		—
			Secured Debt		12/1/2021		11.50%				12/1/2026	24,480		24,410		24,410
			Preferred Equity	(8) (29)	12/1/2021	12,240								12,240		12,240
														36,650		36,650
Ziegler’s NYPD, LLC		Casual Restaurant Group
			Secured Debt		12/30/2024		12.00%				12/31/2027	1,750		1,750		1,750
			Preferred Member Units		6/30/2015	16,878								3,154		50
			Warrants	(27)	7/1/2015	587					10/1/2025			600		—
														5,504		1,800
Subtotal Control investments (79.6% of net assets at fair value)														$	1,561,120	$	2,295,565
Affiliate Investments (6)
AAC Holdings, Inc.	(11)	Substance Abuse Treatment Service Provider
			Secured Debt		4/1/2025		18.00%			18.00%	8/6/2025	$	779	$	779	$	779
			Secured Debt	(14)	3/28/2025		10.00%			10.00%	3/31/2030	3,109		3,109		3,109
			Secured Debt	(14)	3/28/2025		12.00%			12.00%	3/31/2030	3,109		3,109		3,109
			Preferred Equity		3/28/2025	12,621,635								8,520		8,160
			Common Stock		12/11/2020	654,743								3,148		—
			Warrants	(27)	12/11/2020	574,598					12/11/2025			—		—
														18,665		15,157
Boccella Precast Products LLC		Manufacturer of Precast Hollow Core Concrete
			Secured Debt		9/23/2021		10.00%				2/28/2027	256		256		256
			Member Units	(8)	6/30/2017	2,160,000								2,256		1,490
														2,512		1,746
Buca C, LLC		Casual Restaurant Group
			Secured Debt	(14) (17)	8/7/2024		15.00%			15.00%	11/4/2024	7,354		6,043		—
			Secured Debt	(14) (17)	6/28/2024		15.00%			15.00%	4/1/2025	16		—		—
			Secured Debt	(14) (17)	6/30/2015		15.00%			15.00%	8/31/2023	10,297		5,862		—

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Preferred Member Units		6/30/2015	6	6.00%			6.00%			4,770	—
													16,675	—
Career Team Holdings, LLC		Provider of Workforce Training and Career Development Services
			Secured Debt	(9) (25)	12/17/2021			SF+	6.00%		12/17/2026	—	(49)	(49)
			Secured Debt		12/17/2021		12.50%				12/17/2026	21,892	21,459	21,459
			Common Stock		12/17/2021	516,617							5,166	5,220
													26,576	26,630
CenterPeak Holdings, LLC		Executive Search Services
			Secured Debt	(25)	12/10/2021						12/10/2026	—	(9)	—
			Secured Debt		12/10/2021		15.00%				12/10/2026	21,507	21,441	21,507
			Preferred Equity	(8)	12/10/2021	3,310							3,635	18,770
													25,067	40,277
Classic H&G Holdings, LLC		Provider of Engineered Packaging Solutions
			Preferred Member Units		3/12/2020	154							—	1,960

Congruent Credit Opportunities Funds	(12) (13)	Investment Partnership
			LP Interests (Congruent Credit Opportunities Fund III, LP)	(8) (30)	2/4/2015	12.49%							1,277	662

Connect Telecommunications Solutions Holdings, Inc.	(13)	Value-Added Distributor of Fiber Products and Equipment
			Secured Debt		10/9/2024		13.00%				10/9/2029	25,417	25,201	25,201
			Preferred Equity		10/9/2024	22,304							12,596	12,596
													37,797	37,797
DMA Industries, LLC		Distributor of Aftermarket Ride Control Products
			Secured Debt		6/18/2024		12.00%				6/18/2029	560	556	556
			Secured Debt		11/19/2021		12.00%				6/18/2029	16,800	16,730	16,730
			Preferred Equity		11/19/2021	5,944							5,944	6,294
			Preferred Equity	(8)	6/18/2024	3,068	15.00%			15.00%			3,485	3,665
													26,715	27,245
Dos Rios Partners	(12) (13)	Investment Partnership
			LP Interests (Dos Rios Partners, LP)	(30)	4/25/2013	20.24%							6,032	7,795
			LP Interests (Dos Rios Partners - A, LP)	(30)	4/25/2013	6.43%							1,915	2,475
													7,947	10,270
Dos Rios Stone Products LLC	(10)	Limestone and Sandstone Dimension Cut Stone Mining Quarries
			Class A Preferred Units	(29)	6/27/2016	2,000,000							2,000	—

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

EIG Fund Investments	(12) (13)	Investment Partnership
			LP Interests (EIG Global Private Debt Fund-A, L.P.)	(8)	11/6/2015	5,000,000							416	369

FCC Intermediate Holdco, LLC		Supply Chain Management Services
			Secured Debt		5/28/2024		13.00%				5/29/2029	31,980	28,789	31,980
			Warrants	(8) (27)	5/28/2024	12							3,920	14,630
													32,709	46,610
Freeport Financial Funds	(12) (13)	Investment Partnership
			LP Interests (Freeport Financial SBIC Fund LP)	(30)	3/23/2015	9.30%							2,580	1,843
			LP Interests (Freeport First Lien Loan Fund III LP)	(30)	7/31/2015	5.95%							671	193
													3,251	2,036
GFG Group, LLC		Grower and Distributor of a Variety of Plants and Products to Other Wholesalers, Retailers and Garden Centers
			Secured Debt		3/31/2021		8.00%				3/31/2026	9,253	9,253	9,253
			Preferred Member Units	(8)	3/31/2021	226							4,900	10,110
													14,153	19,363
Gulf Manufacturing, LLC	(13) (21)	Manufacturer of Specialty Fabricated Industrial Piping Products
			Secured Debt	(25)	3/15/2024			SF+	7.63%		3/15/2029	—	(37)	(37)
			Secured Debt		3/15/2024		12.00%	SF+	7.63%		3/15/2029	38,000	37,721	37,721
			Member Units	(8)	8/31/2007	438							2,980	14,600
			Common Stock		11/18/2024	888							888	960
													41,552	53,244
Harris Preston Fund Investments	(12) (13)	Investment Partnership
			LP Interests (HPEP 3, L.P.)	(30)	8/9/2017	8.22%							2,092	4,462
			LP Interests (HPEP 4, L.P.)	(30)	7/12/2022	11.61%							6,409	7,163
			LP Interests (423 HAR, L.P.)	(30)	6/2/2023	15.60%							750	1,226
													9,251	12,851
Hawk Ridge Systems, LLC		Value-Added Reseller of Engineering Design and Manufacturing Solutions
			Secured Debt	(9)	12/2/2016		10.48%	SF+	6.00%		1/15/2026	2,490	2,489	2,490
			Secured Debt		12/2/2016		12.50%				1/15/2026	45,256	45,227	45,256
			Preferred Member Units	(8)	12/2/2016	226							2,850	22,730
			Preferred Member Units	(29)	12/2/2016	226							150	1,200
													50,716	71,676
Houston Plating and Coatings, LLC		Provider of Plating and Industrial Coating Services

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Unsecured Convertible Debt		5/1/2017		10.00%				4/2/2026	3,000	3,000	3,000
			Member Units	(8)	1/8/2003	322,297							2,352	4,350
													5,352	7,350
Independent Pet Partners Intermediate Holdings, LLC	(10)	Omnichannel Retailer of Specialty Pet Products
			Common Equity		4/7/2023	18,006,407							18,300	19,760

Infinity X1 Holdings, LLC		Manufacturer and Supplier of Personal Lighting Products
			Secured Debt		3/31/2023		12.00%				3/31/2028	16,372	16,358	16,372
			Preferred Equity	(8)	3/31/2023	87,360							4,368	8,550
													20,726	24,922
Integral Energy Services	(10)	Nuclear Power Staffing Services
			Secured Debt	(9)	8/20/2021		12.06%	SF+	7.50%		8/20/2026	12,273	12,215	11,928
			Preferred Equity	(8)	12/7/2023	3,188	10.00%			10.00%			267	520
			Preferred Equity		6/3/2025	1,067	10.00%			10.00%			114	190
			Common Stock		8/20/2021	9,968							1,356	690
													13,952	13,328
Iron-Main Investments, LLC		Consumer Reporting Agency Providing Employment Background Checks and Drug Testing
			Secured Debt		8/2/2021		13.00%				1/31/2028	4,514	4,497	4,497
			Secured Debt		9/1/2021		13.00%				1/31/2028	2,940	2,929	2,929
			Secured Debt		11/15/2021		13.00%				1/31/2028	8,944	8,944	8,944
			Secured Debt		11/15/2021		13.00%				1/31/2028	17,624	17,556	17,556
			Secured Debt		1/31/2023		13.00%				1/31/2028	9,554	9,388	9,388
			Preferred Equity		6/26/2024	711	25.00%			25.00%			711	910
			Common Stock		8/3/2021	203,016							2,756	2,700
													46,781	46,924
ITA Holdings Group, LLC		Air Ambulance Services
			Secured Debt	(9)	6/21/2023		12.46%	SF+	8.00%		6/21/2027	1,180	1,171	1,180
			Secured Debt	(9) (25)	6/30/2025			SF+	7.00%		6/21/2027	—	—	—
			Secured Debt	(9)	6/21/2023		11.46%	SF+	7.00%		6/21/2027	4,935	4,402	4,935
			Secured Debt	(9)	6/21/2023		13.46%	SF+	9.00%		6/21/2027	4,935	4,402	4,935
			Secured Debt	(9)	6/30/2025		11.46%	SF+	7.00%		6/21/2027	1,770	1,763	1,770
			Warrants	(8) (27)	6/21/2023	193,307					6/21/2033		2,091	9,840
													13,829	22,660
KMS, LLC	(10)	Wholesaler of Closeout and Value-Priced Products
			Secured Debt		2/10/2025		12.50%			12.50%	10/1/2028	1,142	1,113	1,113
			Secured Debt		2/10/2025		12.50%			12.50%	10/1/2028	1,180	1,180	1,180
			Preferred Equity		2/10/2025	9,213							4,890	4,890
													7,183	7,183

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Mills Fleet Farm Group, LLC	(10)	Omnichannel Retailer of Work, Farm and Lifestyle Merchandise
			Secured Debt	(9)	12/19/2024		9.79%	SF+	5.50%	9.79%	12/31/2026	2,763	2,763	2,763
			Secured Debt	(9) (25)	4/11/2025			SF+	5.50%		12/31/2026	—	—	—
			Preferred Equity	(8) (29)	12/19/2024	66,306							14,396	12,880
													17,159	15,643
Moffitt Holdings, LLC		Bulk Fuel and Lubricants Distributor
			Secured Debt		3/19/2025		13.00%				3/19/2030	35,000	34,673	34,673
			Preferred Equity		3/19/2025	14,300							14,300	14,300
													48,973	48,973
MoneyThumb Acquisition, LLC		Provider of Software-as-a-Service Financial File Conversion and Reconciliation
			Secured Debt		8/19/2024		14.00%				8/19/2029	9,280	8,734	8,734
			Preferred Member Units	(8)	8/19/2024	163,282	12.00%			12.00%			1,812	1,812
			Warrants	(27)	8/19/2024	59,368					8/19/2029		594	594
													11,140	11,140
OnAsset Intelligence, Inc.		Provider of Transportation Monitoring / Tracking Products and Services
			Secured Debt	(14)	4/18/2011		12.00%			12.00%	9/30/2025	4,415	4,415	455
			Secured Debt	(14)	5/10/2013		12.00%			12.00%	9/30/2025	2,116	2,116	218
			Secured Debt	(14)	3/21/2014		12.00%			12.00%	9/30/2025	983	983	101
			Secured Debt	(14)	5/20/2014		12.00%			12.00%	9/30/2025	964	964	99
			Unsecured Debt	(14)	6/5/2017		10.00%			10.00%	9/30/2025	305	305	305
			Preferred Stock		4/18/2011	912	7.00%			7.00%			1,981	—
			Common Stock		4/15/2021	635							830	—
			Warrants	(27)	4/18/2011	4,699					5/10/2027		1,089	—
													12,683	1,178
Oneliance, LLC		Construction Cleaning Company
			Preferred Stock	(8)	8/6/2021	1,128							1,128	3,090

RA Outdoors LLC	(10)	Software Solutions Provider for Outdoor Activity Management
			Secured Debt	(9)	4/8/2021		11.25%	SF+	6.75%		4/8/2026	1,394	1,392	1,149
			Secured Debt	(9)	4/8/2021		11.25%	SF+	6.75%		4/8/2026	1	1	1
			Secured Debt	(9) (25)	2/5/2025			SF+	6.75%		4/8/2026	—	—	—
			Secured Debt	(9)	4/8/2021		11.25%	SF+	6.75%		4/8/2026	14,582	14,553	12,011
			Common Equity		8/12/2024	110							—	—
													15,946	13,161
RFG AcquireCo, LLC		Aerial Survey, Aerial Survey Equipment Sales & Rental, Aircraft Maintenance
			Secured Debt	(25)	6/2/2025						6/2/2027	—	(10)	(10)

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)	PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt	(25)	6/2/2025					6/2/2030	—	—	—
			Secured Debt		6/2/2025		12.50%			6/2/2030	34,000	33,666	33,666
			Preferred Equity		6/2/2025	11,401						11,401	11,401
												45,057	45,057
SI East, LLC		Rigid Industrial Packaging Manufacturing
			Secured Debt		8/31/2018		11.85%			6/16/2028	2,250	2,238	2,250
			Secured Debt	(23)	6/16/2023		12.79%			6/16/2028	67,661	67,563	67,661
			Preferred Member Units		8/31/2018	165						1,525	12,470
												71,326	82,381
Slick Innovations, LLC		Text Message Marketing Platform
			Secured Debt		9/13/2018		14.00%			3/21/2030	25,560	25,295	25,560
			Common Stock	(8)	9/13/2018	70,000						—	1,990
												25,295	27,550
Student Resource Center, LLC	(10)	Higher Education Services
			Secured Debt		9/11/2024		8.50%		8.50%	12/31/2027	213	213	886
			Secured Debt	(14)	12/31/2022		8.50%		8.50%	12/31/2027	5,327	4,884	1,061
			Preferred Equity		12/31/2022	5,907,649						—	—
												5,097	1,947
Superior Rigging & Erecting Co.		Provider of Steel Erecting, Crane Rental & Rigging Services
			Preferred Member Units		8/31/2020	1,636						4,500	15,950

The Affiliati Network, LLC		Performance Marketing Solutions
			Secured Debt	(25)	8/9/2021					8/9/2026	—	(4)	(4)
			Secured Debt		8/9/2021		13.00%			8/9/2026	5,201	5,188	5,110
			Preferred Stock	(8)	9/1/2023	312,910						313	313
			Preferred Stock	(8)	8/9/2021	1,280,000						6,400	6,400
												11,897	11,819
UnionRock Energy Fund II, LP	(12) (13)	Investment Partnership
			LP Interests	(30)	6/15/2020	11.11%						2,881	4,397

UnionRock Energy Fund III, LP	(12) (13)	Investment Partnership
			LP Interests	(30)	6/6/2023	14.91%						4,732	5,172

UniTek Global Services, Inc.	(11)	Provider of Outsourced Infrastructure Services
			Preferred Stock		8/21/2018	11,450,416	20.00%		20.00%			8,416	9,388
			Preferred Stock		6/30/2017	21,382,147	19.00%		19.00%			3,667	—
			Preferred Stock		1/15/2015	42,338,440	13.50%		13.50%			7,924	—
			Common Stock		4/1/2020	2,370,059						—	—

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)		Cost (4)		Fair Value (18)

														20,007		9,388
Urgent DSO LLC		General and Emergency Dentistry Practice
			Secured Debt		2/16/2024		13.50%				2/16/2029	8,800		8,735		8,735
			Preferred Equity	(8)	2/16/2024	4,000	9.00%			9.00%				4,514		4,514
														13,249		13,249
Wildcats Topco LLC		Provider of Veterinary Services and Products
			Common Equity		5/8/2025	22,426,711								22,427		22,427

World Micro Holdings, LLC		Supply Chain Management
			Secured Debt		12/12/2022		11.00%				12/12/2027	9,886		9,839		9,839
			Preferred Equity	(8)	12/12/2022	3,845								3,845		3,845
														13,684		13,684
Subtotal Affiliate investments (29.7% of net assets at fair value)														$	790,583	$	856,226
Non-Control/Non-Affiliate Investments (7)
Adams Publishing Group, LLC	(10)	Local Newspaper Operator
			Secured Debt	(9) (33)	3/11/2022		11.00%	SF+	7.00%	1.00%	3/11/2027	$	7,959	$	7,959	$	7,844
			Secured Debt	(9) (33)	3/11/2022		11.00%	SF+	7.00%	1.00%	3/11/2027	17,665		17,646		17,411
														25,605		25,255
AMEREQUIP LLC	(10)	Full Services Provider Including Design, Engineering and Manufacturing of Commercial and Agricultural Equipment
			Common Stock	(8)	8/31/2022	235								1,844		480

American Health Staffing Group, Inc.	(10)	Healthcare Temporary Staffing
			Secured Debt	(9) (25)	11/19/2021			P+	5.00%		11/19/2026	—		(4)		(4)
			Secured Debt	(9)	11/19/2021		12.50%	P+	5.00%		11/19/2026	5,908		5,890		5,908
														5,886		5,904
Ansira Partners II, LLC	(10)	Provider of Data-Driven Marketing Services
			Secured Debt	(9) (25)	7/1/2024			SF+	6.75%		7/1/2029	—		(166)		(166)
			Secured Debt	(9)	7/1/2024		11.07%	SF+	6.75%		7/1/2029	75,490		73,980		75,049
														73,814		74,883
ArborWorks, LLC	(10)	Vegetation Management Services
			Secured Debt		11/6/2023		15.00%			15.00%	11/6/2028	2,153		2,153		2,153
			Secured Debt	(9)	11/6/2023		10.91%	SF+	6.50%	10.91%	11/6/2028	8,507		8,507		8,507
			Preferred Equity		11/6/2023	32,507								14,060		14,336
			Preferred Equity		11/6/2023	32,507								—		—

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Common Equity		11/9/2021	3,898							234	—
													24,954	24,996
Archer Systems, LLC	(10)	Mass Tort Settlement Administration Solutions Provider
			Common Stock	(8)	8/11/2022	1,387,832							1,388	2,380

ATS Operating, LLC	(10)	For-Profit Thrift Retailer
			Secured Debt	(9) (32)	1/18/2022		10.57%	SF+	6.00%		1/18/2028	1,260	1,182	1,260
			Secured Debt	(9)	1/18/2022		9.56%	SF+	5.00%		1/18/2028	6,660	6,660	6,660
			Secured Debt	(9)	1/18/2022		11.56%	SF+	7.00%		1/18/2028	6,660	6,660	6,660
			Common Stock		1/18/2022	720,000							720	850
													15,222	15,430
AVEX Aviation Holdings, LLC	(10)	Specialty Aircraft Dealer & MRO Provider
			Secured Debt	(9) (25)	12/23/2022			SF+	7.25%		12/23/2027	—	(75)	(75)
			Secured Debt	(9)	12/23/2022		11.70%	SF+	7.25%		12/23/2027	23,762	23,282	23,762
			Common Equity	(8)	12/15/2021	984							934	920
													24,141	24,607
Berry Aviation, Inc.	(10)	Charter Airline Services
			Preferred Member Units	(29)	3/8/2024	286,109							286	—
			Preferred Member Units	(29)	11/12/2019	122,416							—	—
			Preferred Member Units	(29)	7/6/2018	1,548,387							—	—
													286	—
Bettercloud, Inc.	(10)	SaaS Provider of Workflow Management and Business Application Solutions
			Secured Debt	(9) (14)	6/30/2022		14.53%	SF+	10.25%	7.25%	6/30/2028	503	454	76
			Secured Debt	(9) (14) (38)	6/30/2025		14.53%	SF+	10.25%	7.25%	6/30/2028	1,564	63	237
			Secured Debt	(9) (14)	6/30/2022		14.58%	SF+	10.25%	7.25%	6/30/2028	31,792	31,484	4,822
			Secured Debt	(9) (14) (38)	6/30/2025		14.58%	SF+	10.25%	7.25%	6/30/2028	100,947	4,070	15,311
													36,071	20,446
Binswanger Enterprises, LLC	(10)	Glass Repair and Installation Service Provider
			Member Units		3/10/2017	1,050,000							1,050	1,060

Bluestem Brands, Inc.	(11)	Multi-Channel Retailer of General Merchandise
			Secured Debt	(9) (14)	1/9/2024		12.94%	SF+	8.50%	11.94%	8/28/2025	202	131	101
			Secured Debt	(9) (14)	10/19/2022		15.00%	P+	7.50%	14.75%	8/28/2025	3,150	3,150	1,584
			Secured Debt	(9) (14)	8/28/2020		12.94%	SF+	8.50%	12.94%	8/28/2025	4,183	3,961	2,103
			Common Stock		10/1/2020	723,184							1	—
			Warrants	(27)	10/19/2022	163,295					10/19/2032		1,036	—
													8,279	3,788

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

B-O-F Corporation	(10)	Manufacturer of Gravity Flow Shelving Solutions for Retail Applications
			Secured Debt	(9) (25)	2/3/2025			SF+	5.75%		2/3/2030	—	(19)	(19)
			Secured Debt	(9)	2/3/2025		9.05%	SF+	4.75%		2/3/2030	4,145	4,079	4,079
			Secured Debt	(9)	2/3/2025		11.05%	SF+	6.75%		2/3/2030	4,145	4,079	4,079
			Common Equity		2/3/2025	248,718							249	249
													8,388	8,388
Bond Brand Loyalty ULC	(10) (13) (21)	Provider of Loyalty Marketing Services
			Secured Debt	(9)	5/1/2023		11.45%	SF+	7.00%		5/1/2028	571	555	571
			Secured Debt	(9)	5/1/2023		10.45%	SF+	6.00%		5/1/2028	6,293	6,221	6,293
			Secured Debt	(9)	5/1/2023		12.45%	SF+	8.00%		5/1/2028	6,293	6,221	6,293
			Preferred Equity		5/1/2023	571							571	550
			Common Equity		5/1/2023	571							—	—
													13,568	13,707
BP Loenbro Holdings Inc.	(10)	Specialty Industrial Maintenance Services
			Secured Debt	(9)	2/1/2024		10.18%	SF+	5.75%		2/1/2029	899	829	899
			Secured Debt	(9)	2/1/2024		10.15%	SF+	5.75%		2/1/2029	2,023	1,973	2,023
			Secured Debt	(9)	2/1/2024		10.11%	SF+	5.75%		2/1/2029	25,839	25,463	25,839
			Secured Debt	(9)	1/2/2025		10.14%	SF+	5.75%		2/1/2029	9,470	9,346	9,470
			Common Equity		2/1/2024	2,583,963							2,709	5,900
													40,320	44,131
Brainworks Software, LLC	(10)	Advertising Sales and Newspaper Circulation Software
			Secured Debt	(9) (14) (17)	8/12/2014		15.25%	P+	7.25%		7/22/2019	761	761	761
			Secured Debt	(9) (14) (17)	8/12/2014		15.25%	P+	7.25%		7/22/2019	7,056	7,056	230
													7,817	991
Brightwood Capital Fund Investments	(12) (13)	Investment Partnership
			LP Interests (Brightwood Capital Fund III, LP)	(30)	7/21/2014	1.59%							5,189	2,898
			LP Interests (Brightwood Capital Fund IV, LP)	(8) (30)	10/26/2016	0.59%							3,475	3,477
			LP Interests (Brightwood Capital Fund V, LP)	(8) (30)	7/12/2021	0.72%							4,500	4,875
													13,164	11,250
Burning Glass Intermediate Holding Company, Inc.	(10)	Provider of Skills-Based Labor Market Analytics
			Secured Debt	(9)	6/14/2021		9.19%	SF+	5.00%		6/10/2026	1,758	1,750	1,758
			Secured Debt	(9)	6/14/2021		9.45%	SF+	5.00%		6/10/2028	16,956	16,824	16,956
													18,574	18,714
CAI Software LLC		Provider of Specialized Enterprise Resource Planning Software

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Preferred Equity		12/13/2021	2,142,167							2,142	3,510
			Preferred Equity		12/13/2021	596,176							—	—
													2,142	3,510
CaseWorthy, Inc.	(10)	SaaS Provider of Case Management Solutions
			Common Equity		12/30/2022	325,408							325	660

Channel Partners Intermediateco, LLC	(10)	Outsourced Consumer Services Provider
			Secured Debt	(9) (32)	2/7/2022		11.57%	SF+	7.00%		2/7/2027	4,350	4,263	4,322
			Secured Debt	(9)	2/7/2022		11.55%	SF+	7.00%		2/7/2027	35,981	35,746	35,747
			Secured Debt	(9)	6/24/2022		11.55%	SF+	7.00%		2/7/2027	1,993	1,980	1,980
			Secured Debt	(9)	3/27/2023		11.55%	SF+	7.00%		2/7/2027	4,818	4,767	4,787
													46,756	46,836
Clarius BIGS, LLC	(10)	Prints & Advertising Film Financing
			Secured Debt	(14) (17)	9/23/2014						1/5/2015	2,637	2,637	8

Computer Data Source, LLC	(10)	Third Party Maintenance Provider to the Data Center Ecosystem
			Secured Debt	(9) (32)	8/6/2021		12.69%	SF+	8.25%		8/6/2026	8,325	8,268	7,625
			Secured Debt	(9)	8/6/2021		12.70%	SF+	8.25%		8/6/2026	20,287	20,207	18,583
													28,475	26,208
Coregistics Buyer LLC	(10) (13) (21)	Contract Packaging Service Provider
			Secured Debt	(9) (32)	6/29/2024		10.83%	SF+	6.50%		6/28/2029	1,669	1,599	1,669
			Secured Debt	(9)	6/29/2024		10.83%	SF+	6.50%		6/28/2029	10,623	10,419	10,623
			Secured Debt	(9)	8/15/2024		10.83%	SF+	6.50%		6/28/2029	7,082	6,966	7,082
			Secured Debt	(9)	6/29/2024		11.08%	SF+	6.75%		6/28/2029	31,951	31,315	32,060
													50,299	51,434
CQ Fluency, LLC	(10)	Global Language Services Provider
			Secured Debt	(9) (25)	12/27/2023			SF+	7.00%		6/27/2027	—	(38)	(38)
			Secured Debt	(9)	12/27/2023		11.40%	SF+	7.00%		6/27/2027	10,547	10,369	10,547
													10,331	10,509
Creative Foam Corporation	(10)	Manufacturer of Custom Engineered Die Cut, Formed Foam, Nonwoven, and Multi-material Component Solutions for the Automotive and Healthcare Markets
			Secured Debt	(9) (25)	6/27/2024			SF+	6.25%		6/27/2029	—	(210)	(210)
			Secured Debt	(9)	6/27/2024		10.55%	SF+	6.25%		6/27/2029	90,939	89,468	90,939
			Secured Debt	(9)	3/4/2025		10.57%	SF+	6.25%		6/27/2029	5,671	5,559	5,671
			Common Equity		3/4/2025	10,851							1,085	1,085
													95,902	97,485

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Dalton US Inc.	(10)	Provider of Supplemental Labor Services
			Common Stock		8/16/2022	515							720	650

DTE Enterprises, LLC	(10)	Industrial Powertrain Repair and Services
			Class AA Preferred Member Units (non-voting)		4/13/2018		10.00%			10.00%			1,316	—
			Class A Preferred Member Units		4/13/2018	776,316	8.00%			8.00%			776	—
													2,092	—
Dynamic Communities, LLC	(10)	Developer of Business Events and Online Community Groups
			Secured Debt	(9)	12/20/2022		11.43%	SF+	7.00%	11.43%	12/31/2026	2,456	2,298	2,414
			Secured Debt	(9)	12/20/2022		12.43%	SF+	8.00%		12/31/2026	2,493	2,259	2,383
			Preferred Equity		12/20/2022	125,000							128	110
			Preferred Equity		12/20/2022	2,376,241							—	—
			Common Equity		12/20/2022	1,250,000							—	—
													4,685	4,907
Electro Technical Industries, LLC	(10)	Manufacturer of Mission-Critical Electrical Distribution Systems
			Secured Debt	(9) (25)	3/31/2025			SF+	6.00%		3/31/2030	—	(166)	(166)
			Secured Debt	(9)	3/31/2025		10.33%	SF+	6.00%		3/31/2030	50,795	49,846	50,286
			Common Equity		3/31/2025	1,464,286							1,464	1,464
													51,144	51,584
Emerald Technologies Acquisition Co, Inc.	(11)	Design & Manufacturing
			Secured Debt	(9)	2/10/2022		10.73%	SF+	6.25%		12/29/2027	9,459	9,332	6,620

EnCap Energy Fund Investments	(12) (13)	Investment Partnership
			LP Interests (EnCap Energy Capital Fund VIII, L.P.)	(8) (30)	1/22/2015	0.14%							3,445	1,846
			LP Interests (EnCap Energy Capital Fund VIII Co- Investors, L.P.)	(8) (30)	1/21/2015	0.38%							1,841	817
			LP Interests (EnCap Energy Capital Fund IX, L.P.)	(8) (30)	1/22/2015	0.10%							3,256	1,176
			LP Interests (EnCap Energy Capital Fund X, L.P.)	(8) (30)	3/25/2015	0.15%							6,935	4,814
			LP Interests (EnCap Energy Capital Fund XII, L.P.)	(8) (30)	8/31/2023	0.19%							3,914	4,165
			LP Interests (EnCap Flatrock Midstream Fund II, L.P.)	(8) (30)	3/30/2015	0.84%							4,739	1,143

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			LP Interests (EnCap Flatrock Midstream Fund III, L.P.)	(8) (30)	3/27/2015	0.25%							3,372	2,815
													27,502	16,776
Escalent, Inc.	(10)	Market Research and Consulting Firm
			Secured Debt	(9) (25)	4/7/2023			SF+	6.00%		4/7/2029	—	(25)	(25)
			Secured Debt	(9)	10/2/2024		10.30%	SF+	6.00%		4/7/2029	1,375	1,355	1,375
			Secured Debt	(9)	4/7/2023		10.30%	SF+	6.00%		4/7/2029	25,915	25,423	25,915
			Common Equity	(8)	4/7/2023	649,794							663	910
													27,416	28,175
Event Holdco, LLC	(10)	Event and Learning Management Software for Healthcare Organizations and Systems
			Secured Debt	(9)	12/22/2021		12.56%	SF+	8.00%		12/22/2026	3,692	3,681	3,692
			Secured Debt	(9)	12/22/2021		12.56%	SF+	8.00%	4.00%	12/22/2026	48,317	48,186	48,317
													51,867	52,009
Fuse, LLC	(11)	Cable Networks Operator
			Secured Debt		6/30/2019		12.00%				12/31/2026	1,810	1,810	722
			Common Stock		6/30/2019	10,429							256	—
													2,066	722
Garyline, LLC	(10)	Manufacturer of Consumer Plastic Products
			Secured Debt	(9) (32)	4/14/2025		11.32%	SF+	7.00%		10/14/2027	3,080	2,989	2,989
			Secured Debt	(9)	4/14/2025		11.31%	SF+	7.00%		10/14/2027	28,971	28,449	28,449
			Common Equity		11/10/2023	705,882							706	500
													32,144	31,938
GradeEight Corp.	(10)	Distributor of Maintenance and Repair Parts
			Secured Debt	(9)	10/4/2024		13.75%	P+	6.25%		10/4/2029	652	567	638
			Secured Debt	(9) (25)	10/4/2024			SF+	7.25%		10/4/2029	—	(43)	(43)
			Secured Debt	(9) (26)	10/4/2024		11.47%	SF+	7.25%		10/4/2029	31,208	30,677	30,529
			Common Equity		10/4/2024	1,365							1,365	1,070
													32,566	32,194
GS HVAM Intermediate, LLC	(10)	Specialized Food Distributor
			Secured Debt	(9) (25)	10/18/2019			SF+	6.50%		2/28/2026	—	(6)	—
			Secured Debt	(9)	10/18/2019		10.93%	SF+	6.50%		2/28/2026	10,447	10,419	10,447
			Secured Debt	(9)	9/15/2023		10.93%	SF+	6.50%		2/28/2026	937	935	937
			Secured Debt	(9)	12/22/2023		10.93%	SF+	6.50%		2/28/2026	224	222	224
			Secured Debt	(9)	8/22/2024		10.93%	SF+	6.50%		2/28/2026	6,042	6,021	6,042
													17,591	17,650
GULF PACIFIC ACQUISITION, LLC	(10)	Rice Processor and Merchandiser
			Secured Debt	(9) (32)	9/30/2022		11.42%	SF+	7.00%		9/30/2028	454	442	418
			Secured Debt	(9)	9/30/2022		11.41%	SF+	7.00%		9/30/2028	296	286	273

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt	(9)	9/30/2022		11.43%	SF+	7.00%		9/30/2028	3,560	3,513	3,277
													4,241	3,968
Harris Preston Fund Investments	(12) (13)	Investment Partnership
			LP Interests (423 AER II, LP)	(30)	6/2/2025								1,526	1,526

HDC/HW Intermediate Holdings	(10)	Managed Services and Hosting Provider
			Secured Debt	(9)	4/30/2025		13.56%	SF+	9.00%		6/21/2026	68	68	68
			Secured Debt	(9)	3/7/2024		9.01%	SF+	3.50%	9.01%	6/21/2026	2,621	2,556	2,399
			Secured Debt	(14)	3/7/2024		2.50%			2.50%	6/21/2026	1,626	713	18
			Common Equity		3/7/2024	64,029							—	—
													3,337	2,485
HEADLANDS OP-CO LLC	(10)	Clinical Trial Sites Operator
			Secured Debt	(9) (25)	8/1/2022			SF+	6.50%		8/1/2027	—	(28)	(28)
			Secured Debt	(9)	8/1/2022		10.83%	SF+	6.50%		8/1/2027	6,632	6,568	6,632
			Secured Debt	(9)	6/3/2024		10.83%	SF+	6.50%		8/1/2027	4,690	4,634	4,690
			Secured Debt	(9)	8/1/2022		10.83%	SF+	6.50%		8/1/2027	16,369	16,232	16,369
			Secured Debt	(9)	6/3/2024		10.83%	SF+	6.50%		8/1/2027	7,999	7,946	7,999
													35,352	35,662
Hornblower Sub, LLC	(10)	Marine Tourism and Transportation
			Secured Debt	(9) (32)	7/3/2024		9.80%	SF+	5.50%		7/3/2029	4,865	4,825	4,838
			Secured Debt	(9) (26)	7/3/2024		9.78%	SF+	5.50%		7/3/2029	32,765	32,482	32,582
													37,307	37,420
HOWLCO LLC	(11) (13) (21)	Provider of Accounting and Business Development Software to Real Estate End Markets
			Secured Debt	(9)	8/19/2021		10.94%	SF+	6.50%	3.50%	10/23/2027	26,705	26,705	26,416

Hybrid Promotions, LLC	(10)	Wholesaler of Licensed, Branded and Private Label Apparel
			Secured Debt	(9)	6/30/2021		12.81%	SF+	8.25%		12/31/2027	7,200	7,094	7,200

IG Parent Corporation	(11)	Software Engineering
			Secured Debt	(9) (25)	7/30/2021			SF+	5.75%		7/30/2028	—	(9)	—
			Secured Debt	(9)	7/30/2021		10.18%	SF+	5.75%		7/30/2028	10,154	10,085	10,154
			Secured Debt	(9)	7/30/2021		10.18%	SF+	5.75%		7/30/2028	4,878	4,842	4,878
													14,918	15,032
Imaging Business Machines, L.L.C.	(10)	Technology Hardware & Equipment
			Common Equity		6/8/2023	849							1,166	980

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Implus Footcare, LLC	(10)	Provider of Footwear and Related Accessories
			Secured Debt	(9)	6/13/2025		10.45%	SF+	6.00%	4.00%	8/29/2025	849	849	849
			Secured Debt	(9) (14)	6/1/2017		13.70%	SF+	7.75%	1.50%	7/31/2025	18,627	18,627	11,200
													19,476	12,049
Insight Borrower Corporation	(10)	Test, Inspection, and Certification Instrument Provider
			Secured Debt	(9) (25)	7/19/2023			SF+	6.25%		7/19/2028	—	(47)	(47)
			Secured Debt	(9)	7/19/2023		10.52%	SF+	6.25%		7/19/2029	14,190	13,860	13,380
			Common Equity		7/19/2023	131,100							656	320
													14,469	13,653
Inspire Aesthetics Management, LLC	(10)	Surgical and Non-Surgical Plastic Surgery and Aesthetics Provider
			Secured Debt	(9)	4/3/2023		14.42%	SF+	10.00%	2.00%	4/3/2028	849	836	792
			Secured Debt	(9)	4/3/2023		14.42%	SF+	10.00%	2.00%	4/3/2028	7,291	7,188	6,802
			Secured Debt	(9)	6/14/2023		14.42%	SF+	10.00%	2.00%	4/3/2028	2,933	2,894	2,736
			Secured Debt	(9)	12/31/2024		14.42%	SF+	10.00%	2.00%	4/3/2028	338	338	315
			Common Equity		4/3/2023	177,594							463	38
													11,719	10,683
Interface Security Systems, L.L.C	(10)	Commercial Security & Alarm Services
			Secured Debt	(17) (32)	12/9/2021		14.43%	SF+	10.00%	14.43%	8/7/2023	2,228	2,228	1,850
			Secured Debt	(9) (14) (17)	8/7/2019		11.43%	SF+	7.00%	11.43%	8/7/2023	7,313	7,237	11
			Common Stock		12/7/2021	2,143							—	—
													9,465	1,861
Invincible Boat Company, LLC.	(10)	Manufacturer of Sport Fishing Boats
			Secured Debt	(9)	8/28/2019		11.98%	SF+	7.50%		12/31/2026	1,037	1,034	963
			Secured Debt	(9)	8/28/2019		11.98%	SF+	7.50%		12/31/2026	16,535	16,484	15,347
													17,518	16,310
Isagenix International, LLC	(11)	Direct Marketer of Health & Wellness Products
			Secured Debt	(9) (35)	4/13/2023		2.50%				4/14/2028	3,159	2,984	457
			Common Equity		4/13/2023	198,743							—	—
													2,984	457
Island Pump and Tank, LLC	(10)	Provider of Facility and Maintenance Services to Fuel Retailers in Northeast U.S.
			Secured Debt	(9) (32)	5/20/2024		11.57%	SF+	7.00%		5/17/2029	183	178	178
			Secured Debt	(9)	5/20/2024		10.56%	SF+	6.00%		5/17/2029	2,111	2,080	2,065
			Secured Debt	(9)	5/20/2024		11.56%	SF+	7.00%		5/17/2029	2,111	2,080	2,065
			Secured Debt	(9)	5/20/2024		12.56%	SF+	8.00%		5/17/2029	2,111	2,080	2,065
													6,418	6,373

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Jackmont Hospitality, Inc.	(10)	Franchisee of Casual Dining Restaurants
			Secured Debt	(9) (26)	10/26/2022		11.41%	SF+	7.00%		11/4/2026	771	764	771
			Secured Debt	(9) (26)	2/27/2024		11.38%	SF+	7.00%		11/4/2026	625	620	625
			Secured Debt	(9) (26)	11/1/2024		11.45%	SF+	7.00%		11/4/2026	667	653	667
			Secured Debt	(9)	11/8/2021		11.38%	SF+	7.00%		11/4/2026	1,790	1,775	1,790
			Preferred Equity		11/8/2021	2,826,667							110	780
													3,922	4,633
JDC Power Services, LLC	(10)	Provider of Electrical Equipment and Maintenance Services for Datacenters
			Secured Debt	(9) (25)	6/28/2024			SF+	6.25%		6/28/2029	—	(144)	(144)
			Secured Debt	(9)	6/28/2024		10.55%	SF+	6.25%		6/28/2029	60,193	58,971	60,193
													58,827	60,049
Joerns Healthcare, LLC	(11)	Manufacturer and Distributor of Health Care Equipment & Supplies
			Secured Debt	(9)	3/30/2024		13.13%	SF+	8.75%	6.00%	3/29/2029	1,824	1,824	1,824
			Secured Debt	(9)	3/30/2024		13.13%	SF+	8.75%	6.00%	3/29/2029	1,362	1,362	1,362
			Common Stock		3/29/2024	5,461,019							200	350
													3,386	3,536
JTI Electrical & Mechanical, LLC	(10)	Electrical, Mechanical and Automation Services
			Secured Debt	(9) (14) (32)	12/22/2021		10.80%	SF+	6.25%		12/22/2026	8,421	8,362	6,360
			Secured Debt	(9) (14)	12/22/2021		10.80%	SF+	6.25%		12/22/2026	35,289	35,038	26,653
			Secured Debt	(9) (14)	2/1/2024		10.80%	SF+	6.25%		12/22/2026	3,305	3,245	2,496
			Common Equity		12/22/2021	1,684,211							1,684	—
													48,329	35,509
LKCM Headwater Investments I, L.P.	(12) (13)	Investment Partnership
			LP Interests	(8) (30)	1/25/2013	2.27%							—	692

LL Management, Inc.	(10)	Medical Transportation Service Provider
			Secured Debt	(9)	9/17/2024		11.84%	SF+	7.25%		12/31/2025	1,156	1,156	1,156
			Secured Debt	(9)	5/2/2019		11.84%	SF+	7.25%		12/31/2025	8,527	8,496	8,527
			Secured Debt	(9)	5/2/2019		11.84%	SF+	7.25%		12/31/2025	5,457	5,437	5,457
			Secured Debt	(9)	11/20/2020		11.84%	SF+	7.25%		12/31/2025	2,864	2,853	2,864
			Secured Debt	(9)	2/26/2021		11.84%	SF+	7.25%		12/31/2025	1,113	1,109	1,113
			Secured Debt	(9)	5/12/2022		11.84%	SF+	7.25%		12/31/2025	11,271	11,229	11,271
													30,280	30,388
LLFlex, LLC	(10)	Provider of Metal-Based Laminates
			Secured Debt	(9)	8/16/2021		12.45%	SF+	8.00%	3.00%	8/16/2026	4,184	4,150	3,160

Logix Acquisition Company, LLC	(10)	Competitive Local Exchange Carrier

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt	(9)	4/11/2025		10.07%	SF+	5.75%		12/31/2028	42,030	41,431	41,431
			Secured Debt		4/11/2025						12/31/2028	2,773	2,016	2,016
													43,447	43,447
Looking Glass Investments, LLC	(12) (13)	Specialty Consumer Finance
			Member Units		7/1/2015	3							125	25

Microbe Formulas, LLC	(10)	Nutritional Supplements Provider
			Secured Debt	(9) (25)	4/4/2022			SF+	5.75%		4/3/2028	—	(33)	(33)
			Secured Debt	(9)	11/20/2024		10.17%	SF+	5.75%		4/3/2028	11,079	10,953	11,079
			Secured Debt	(9)	4/4/2022		10.18%	SF+	5.75%		4/3/2028	17,667	17,500	17,667
													28,420	28,713
Mini Melts of America, LLC	(10)	Manufacturer and Distributor of Branded Premium Beaded Ice Cream
			Secured Debt	(9) (32)	11/30/2023		10.54%	SF+	6.25%		11/30/2028	1,310	1,281	1,255
			Secured Debt	(9) (26)	11/30/2023		10.56%	SF+	6.25%		11/30/2028	1,308	1,285	1,264
			Secured Debt	(9)	11/30/2023		9.58%	SF+	5.25%		11/30/2028	4,845	4,765	4,679
			Secured Debt	(9)	11/30/2023		11.58%	SF+	7.25%		11/30/2028	4,845	4,761	4,682
			Common Equity		11/30/2023	524,888							525	330
													12,617	12,210
Mission Critical Group	(10)	Backup Power Generation
			Secured Debt	(9) (25)	4/17/2025			SF+	6.00%		4/17/2030	—	(218)	(218)
			Secured Debt	(9) (25)	4/17/2025			SF+	6.00%		4/17/2030	—	(262)	(262)
			Secured Debt	(9)	4/17/2025		10.28%	SF+	6.00%		4/17/2030	66,432	65,168	65,168
			Common Equity		6/7/2023	1,234							1,234	6,230
													65,922	70,918
MonitorUS Holding, LLC	(10) (13) (21)	SaaS Provider of Media Intelligence Services
			Secured Debt	(9)	5/24/2022		10.81%	SF+	6.25%		5/24/2027	4,101	4,073	4,418
			Secured Debt	(9)	5/24/2022		10.81%	SF+	6.25%		5/24/2027	10,714	10,634	12,464
			Secured Debt	(9)	5/24/2022		10.81%	SF+	6.25%		5/24/2027	18,018	17,891	18,018
			Secured Debt	(9)	6/25/2025		10.81%	SF+	6.25%		5/24/2027	1,234	1,211	1,211
			Unsecured Debt	(25)	3/1/2024		8.00%			8.00%	6/30/2025	—	—	—
			Unsecured Debt		9/25/2024		8.00%			8.00%	12/21/2025	112	112	112
			Unsecured Debt		1/31/2025		8.00%			8.00%	3/31/2026	78	78	78
			Common Stock		8/30/2022	78,948,902							1,045	602
													35,044	36,903
Northwind Midstream Partners LLC	(10)	Owner and Operator of Midstream Gas Infrastructure
			Secured Debt	(9)	3/18/2025		10.70%	SF+	6.25%		3/18/2030	7,500	7,360	7,425

Obra Capital, Inc.	(10)	Provider of Asset Management Services Specialized in Insurance-Linked Strategies

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt	(9) (25)	6/21/2024			SF+	7.25%		12/21/2028	—	(3)	(3)
			Secured Debt	(9)	6/21/2024		11.68%	SF+	7.25%		6/21/2029	26,221	25,602	26,221
			Secured Debt	(9)	5/13/2025		11.68%	SF+	7.25%		6/21/2029	3,171	3,080	3,171
													28,679	29,389
OnPoint Industrial Services, LLC	(10)	Environmental & Facilities Services
			Secured Debt	(9)	12/18/2024		10.30%	SF+	6.00%		11/16/2027	1,393	1,379	1,393
			Secured Debt	(9)	4/1/2024		10.30%	SF+	6.00%		11/16/2027	3,871	3,837	3,871
													5,216	5,264
Ospemifene Royalty Sub LLC	(10)	Estrogen-Deficiency Drug Manufacturer and Distributor
			Secured Debt	(14)	7/8/2013						11/15/2026	4,373	4,373	44

Peaches Holding Corporation		Wholesale Provider of Consumer Packaging Solutions
			Common Equity		5/22/2024	3,226							7,221	—

PrimeFlight Aviation Services	(10) (13)	Air Freight & Logistics
			Secured Debt	(9)	5/1/2023		9.78%	SF+	5.50%		5/1/2029	7,840	7,654	7,840
			Secured Debt	(9)	9/7/2023		9.80%	SF+	5.50%		5/1/2029	749	729	749
			Secured Debt	(9)	1/30/2024		9.80%	SF+	5.50%		5/1/2029	752	738	752
			Secured Debt	(9)	6/28/2024		9.55%	SF+	5.25%		5/1/2029	855	845	855
			Secured Debt	(9)	1/21/2025		9.52%	SF+	5.25%		5/1/2029	1,895	1,878	1,895
													11,844	12,091
PTL US Bidco, Inc	(10) (13) (21)	Manufacturers of Equipment, Including Drilling Rigs and Equipment, and Providers of Supplies and Services to Companies Involved in the Drilling, Evaluation and Completion of Oil and Gas Wells
			Secured Debt	(9) (32)	8/19/2022		12.78%	SF+	8.25%		8/19/2027	6,838	6,713	6,786
			Secured Debt	(9)	8/19/2022		12.84%	SF+	8.25%		8/19/2027	16,380	16,161	16,255
													22,874	23,041
Purge Rite, LLC	(10)	HVAC Flushing and Filtration Services
			Preferred Equity		10/2/2023	32,813							3,248	3,248
			Common Equity		4/1/2024	32,813							33	6,490
													3,281	9,738
Richardson Sales Solutions	(10)	Business Services
			Secured Debt	(9) (25) (32)	8/24/2023			SF+	6.50%		8/24/2028	—	(64)	—
			Secured Debt	(9)	8/24/2023		10.78%	SF+	6.50%		8/24/2028	33,607	32,887	33,607
			Secured Debt	(9)	9/10/2024		10.71%	SF+	6.50%		8/24/2028	21,823	21,477	21,823
													54,300	55,430
Roof Opco, LLC	(10)	Residential Re-Roofing/Repair

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt	(9) (25)	8/27/2021			SF+	8.00%		8/27/2026	—	(4)	—
			Secured Debt	(9)	8/27/2021		11.56%	SF+	7.00%		8/27/2026	3,376	3,347	2,901
			Secured Debt	(9)	8/27/2021		13.56%	SF+	9.00%		8/27/2026	3,376	3,347	2,895
													6,690	5,796
Rug Doctor, LLC.	(10)	Carpet Cleaning Products and Machinery
			Secured Debt	(9)	7/16/2021		12.49%	SF+	8.00%	2.00%	11/16/2025	5,947	5,943	5,947
			Secured Debt	(9)	7/16/2021		12.49%	SF+	8.00%	2.00%	11/16/2025	7,107	7,095	7,107
													13,038	13,054
South Coast Terminals Holdings, LLC	(10)	Specialty Toll Chemical Manufacturer
			Secured Debt	(9) (25)	8/8/2024			SF+	5.25%		8/8/2029	—	—	—
			Secured Debt	(9)	8/8/2024		9.68%	SF+	5.25%		8/8/2029	53,320	52,980	53,320
			Common Equity		12/10/2021	864							864	941
													53,844	54,261
SPAU Holdings, LLC	(10)	Digital Photo Product Provider
			Secured Debt	(9) (32)	7/1/2022		11.46%	SF+	7.00%		7/1/2027	2,108	2,076	2,108
			Secured Debt	(9)	7/1/2022		11.45%	SF+	7.00%		7/1/2027	15,489	15,332	15,489
			Common Stock		7/1/2022	638,710							639	690
													18,047	18,287
Team Public Choices, LLC	(11)	Home-Based Care Employment Service Provider
			Secured Debt	(26)	12/22/2020		9.54%	SF+	5.00%		12/18/2027	14,576	14,442	14,525

TEC Services, LLC	(10)	Provider of Janitorial Service for Food Retailers
			Secured Debt	(9) (25)	12/31/2024			SF+	5.50%		12/31/2029	—	(85)	(85)
			Secured Debt	(9) (25)	12/31/2024			SF+	5.50%		12/31/2029	—	(64)	(64)
			Secured Debt	(9)	12/31/2024		9.90%	SF+	5.50%		12/31/2029	32,172	31,747	31,808
													31,598	31,659
Tectonic Financial, LLC		Financial Services Organization
			Common Stock	(8)	5/15/2017	200,000							2,000	4,720

Tex Tech Tennis, LLC	(10)	Sporting Goods & Textiles
			Preferred Equity	(29)	7/7/2021	1,000,000							1,000	2,350

Titan Meter Midco Corp.	(10)	Value Added Distributor of a Variety of Metering and Measurement Products and Solutions to the Energy Industry
			Secured Debt	(9)	3/11/2024		10.81%	SF+	6.50%		3/11/2029	1,439	1,347	1,439
			Secured Debt	(9)	3/11/2024		10.80%	SF+	6.50%		3/11/2029	33,756	32,889	33,756
			Secured Debt	(9)	2/27/2025		10.80%	SF+	6.50%		3/11/2029	4,319	4,222	4,319
			Preferred Equity		3/11/2024	1,218,750	8.00%			8.00%			1,219	1,400

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

													39,677	40,914
U.S. TelePacific Corp.	(11)	Provider of Communications and Managed Services
			Secured Debt	(9) (14)	6/1/2023		11.72%	SF+	7.40%	6.25%	5/2/2027	9,811	2,767	3,925
			Secured Debt	(14)	6/1/2023						5/2/2027	1,003	20	—
													2,787	3,925
UPS Intermediate, LLC	(10)	Provider of Maintenance, Repair, and Overhaul Services for Industrial Equipment Serving the Refining, Chemical, Midstream, Renewables, Power, and Utilities End Markets
			Secured Debt	(9)	7/29/2024		10.33%	SF+	6.00%		7/27/2029	43,121	42,429	42,827
			Common Equity		7/29/2024	1,443,299							1,443	1,680
													43,872	44,507
UserZoom Technologies, Inc.	(10)	Provider of User Experience Research Automation Software
			Secured Debt	(9)	1/11/2023		11.78%	SF+	7.50%		4/5/2029	4,000	3,928	4,000

Vitesse Systems	(10)	Component Manufacturing and Machining Platform
			Secured Debt	(32)	12/22/2023		11.43%	SF+	7.00%		12/22/2028	7,727	7,577	7,727
			Secured Debt	(9)	12/22/2023		11.44%	SF+	7.00%		12/22/2028	41,863	41,138	41,863
													48,715	49,590
VORTEQ Coil Finishers, LLC	(10)	Specialty Coating of Aluminum and Light-Gauge Steel
			Common Equity	(8)	11/30/2021	1,038,462							1,038	2,820

Wash & Wax Systems LLC	(10)	Express Car Wash Operator
			Secured Debt	(9)	4/30/2025		9.78%	SF+	5.50%		4/30/2028	10	10	10
			Secured Debt	(9)	4/30/2025		9.78%	SF+	5.50%		4/30/2028	7,388	7,388	7,388
			Secured Debt		4/30/2025		12.00%			12.00%	7/31/2028	4,829	4,829	4,829
			Common Equity		4/30/2025	3,219							3,410	3,660
													15,637	15,887
Watterson Brands, LLC	(10)	Facility Management Services
			Secured Debt		12/17/2021		12.00%			4.00%	12/17/2026	2,315	2,302	2,181
			Secured Debt		12/17/2021		12.00%			4.00%	12/17/2026	400	389	378
			Secured Debt		12/17/2021		12.00%			4.00%	12/17/2026	16,461	16,387	15,503
			Secured Debt		12/17/2021		12.00%			4.00%	12/17/2026	13,167	13,107	12,400
													32,185	30,462
Winter Services LLC	(10)	Provider of Snow Removal and Ice Management Services
			Secured Debt	(9) (25) (32)	11/19/2021			SF+	8.00%		11/19/2026	—	(29)	(29)
			Secured Debt	(9)	11/19/2021		12.56%	SF+	8.00%		11/19/2026	1,874	1,860	1,874
			Secured Debt	(9)	1/16/2024		11.56%	SF+	7.00%		11/19/2026	7,240	7,159	7,240

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)		Fair Value (18)

			Secured Debt	(9)	1/16/2024		13.56%	SF+	9.00%		11/19/2026	7,240	7,159		7,240
													16,149		16,325
Xenon Arc, Inc.	(10)	Tech-enabled Distribution Services to Chemicals and Food Ingredients Primary Producers
			Secured Debt	(9)	12/17/2021		10.17%	SF+	5.75%		12/20/2028	23,693	23,462		23,692
			Secured Debt	(9)	12/17/2021		10.12%	SF+	5.75%		12/20/2028	37,249	36,919		37,249
			Secured Debt	(9)	3/31/2025		10.15%	SF+	5.75%		12/20/2028	10,605	10,411		10,605
													70,792		71,546
YS Garments, LLC	(11)	Designer and Provider of Branded Activewear
			Secured Debt	(9)	8/22/2018		11.88%	SF+	7.50%		8/9/2026	10,692	10,589		9,137

ZRG Partners, LLC	(10)	Talent Advisory Services Provider
			Secured Debt	(9)	6/14/2024		12.50%	P+	5.00%		6/14/2029	5,211	5,046		5,211
			Secured Debt	(9) (26)	6/14/2024		10.28%	SF+	6.00%		6/14/2029	8,019	7,803		8,019
			Secured Debt	(9)	6/14/2024		10.17%	SF+	6.00%		6/14/2029	6,535	6,428		6,535
			Secured Debt	(9)	6/14/2024		10.31%	SF+	6.00%		6/14/2029	46,784	46,022		46,784
													65,299		66,549
Subtotal Non-Control/Non-Affiliate investments (67.3% of net assets at fair value)													$	2,001,002	$	1,941,279
Total Portfolio Company investments, June 30, 2025 (176.6% of net assets at fair value)													$	4,352,705	$	5,093,070

Money market funds (included in cash and cash equivalents)
Dreyfus Government Cash Management (36)													$	15,043	$	15,043
Fidelity Government Fund (37)													3,353		3,353
Fidelity Treasury (31)													645		645
Total money market funds													$	19,041	$	19,041

___________________________

(1)All investments are LMM (as defined below) portfolio investments, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of LMM portfolio investments. All of the Company’s investments, unless otherwise noted, are encumbered either as security for the Corporate Facility or SPV Facility (each as defined below) or in support of the debentures guaranteed by the SBA (as defined below) and issued by the Funds (as defined below).

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)

(2)Debt investments are income producing, unless otherwise noted by footnote (14), as described below. Equity and warrants are non-income producing, unless otherwise noted by footnote (8), as described below.

(3)See Note C — Fair Value Hierarchy for Investments — Portfolio Composition and Schedule 12-14 for a summary of geographic location of portfolio companies.

(4)Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.

(5)“Control” investments are defined by the 1940 Act as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.

(6)“Affiliate” investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.

(7)“Non-Control/Non-Affiliate” investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.

(8)Income producing through dividends or distributions.

(9)Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 96% of the loans (based on the par amount) contain Term Secured Overnight Financing Rate (“SOFR”) floors which range between 0.75% and 5.25%, with a weighted-average floor of 1.30%.

(10)Private Loan (as defined below) portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments.

(11)Middle Market (as defined below) portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments.

(12)Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments.

(13)Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.

(14)Non-accrual and non-income producing debt investment.

(15)All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities.”

(16)External Investment Manager (as defined below). Investment is not encumbered as security for the Credit Facilities (as defined below) or in support of the SBA-guaranteed debentures issued by the Funds.

(17)Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.

(18)Investment Fair Value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments —Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

(19)Investments may have a portion, or all, of their income received from Paid-in-Kind (“PIK”) interest or dividends. PIK interest income and cumulative dividend income represent income not paid currently in cash. The difference between the Total Rate and PIK Rate represents the cash rate as of June 30, 2025.

(20)All portfolio company headquarters are based in the United States, unless otherwise noted.

(21)Portfolio company headquarters are located outside of the United States.

(22)The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of SOFR+6.50% (Floor 1.50%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)

(23)The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of 11.85% per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.

(24)Investment Date represents the date of initial investment in the security position.

(25)The position is unfunded and no interest income is being earned as of June 30, 2025. The position may earn a nominal unused facility fee on committed amounts.

(26)Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of June 30, 2025.

(27)Warrants are presented in equivalent shares/units with a strike price of $0.01 per share/unit.

(28)A majority of the variable rate loans in the Investment Portfolio (as defined below) bear interest at a rate that may be determined by reference to either SOFR (“SF”) or an alternate base rate (commonly based on the federal funds rate or the prime rate (“P”)), which typically resets every one, three, or six months at the borrower’s option. SOFR based contracts may include a credit spread adjustment (the “Adjustment”) that is charged in addition to the stated spread. The Adjustment is applied when the SOFR, plus the Adjustment, exceeds the stated floor rate, as applicable. As of June 30, 2025, SOFR based contracts in the portfolio had Adjustments ranging from 0.10% to 0.26%.

(29)Shares/Units represent ownership in a related real estate or holding entity.

(30)Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated.

(31)Effective yield as of June 30, 2025 was approximately 3.95% on the Fidelity Treasury.

(32)Revolving line of credit facility permits the borrower to make an interest rate election regarding the base rate on each draw under the facility. The rate presented represents a weighted-average rate for borrowings under the facility, as of June 30, 2025.

(33)Index based floating interest rate is subject to contractual maximum base rate of 3.00%.

(34)Index based floating interest rate is subject to contractual maximum base rate of 4.00%.

(35)Investment is accruing income at the fixed cash rate of 2.50% as of June 30, 2025.

(36)Effective yield as of June 30, 2025 was approximately 4.18% on the Dreyfus Government Cash Management.

(37)Effective yield as of June 30, 2025 was approximately 3.99% on the Fidelity Government Fund.

(38)Investment purchased through a distressed sale with the intention to be sold on a short-term basis.

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)		Cost (4)		Fair Value (18)

Control Investments (5)

Analytical Systems Keco Holdings, LLC		Manufacturer of Liquid and Gas Analyzers
			Secured Debt	(25)	8/16/2019						8/16/2029	$	—	$	—	$	—
			Secured Debt		8/16/2019		13.75%				8/16/2029	4,095		4,048		4,048
			Preferred Member Units		5/20/2021	2,427								2,427		5,300
			Preferred Member Units		8/16/2019	3,200								3,200		—
			Warrants	(27)	8/16/2019	420					8/16/2029			316		—
														9,991		9,348
ASC Interests, LLC		Recreational and Educational Shooting Facility
			Secured Debt	(17)	12/31/2019		13.00%				7/31/2024	400		400		400
			Secured Debt	(17)	8/1/2013		13.00%				7/31/2024	1,650		1,650		1,598
			Preferred Member Units		6/28/2023	178								178		—
			Member Units		8/1/2013	1,500								1,500		—
														3,728		1,998
ATS Workholding, LLC	(10)	Manufacturer of Machine Cutting Tools and Accessories
			Secured Debt	(14)	11/16/2017		5.00%				3/31/2025	2,383		2,374		113
			Secured Debt	(14) (17)	11/16/2017		5.00%				9/1/2024	3,015		2,842		143
			Preferred Member Units		11/16/2017	3,725,862								3,726		—
														8,942		256
Barfly Ventures, LLC	(10)	Casual Restaurant Group
			Secured Debt		10/15/2020		7.00%				10/31/2026	711		711		711
			Member Units		10/26/2020	37								1,584		5,860
														2,295		6,571
Batjer TopCo, LLC		HVAC Mechanical Contractor
			Secured Debt		3/7/2022		10.00%				3/7/2027	450		446		446
			Secured Debt		3/7/2022		10.00%				3/7/2027	270		270		270
			Secured Debt		3/7/2022		10.00%				3/7/2027	10,575		10,529		10,529
			Preferred Stock	(8)	3/7/2022	4,073								4,095		5,160
														15,340		16,405
BDB Holdings, LLC		Casual Restaurant Group
			Preferred Equity		11/4/2024	18,756,995								19,537		18,920

Bolder Panther Group, LLC		Consumer Goods and Fuel Retailer
			Secured Debt	(25)	12/31/2020						12/31/2025	—		—		—
			Secured Debt	(9) (22)	12/31/2020		12.55%	SF+	7.99%		10/31/2027	101,643		101,263		101,643
			Class B Preferred Member Units	(8)	12/31/2020	140,000	8.00%							14,000		30,520
														115,263		132,163
Brewer Crane Holdings, LLC		Provider of Crane Rental and Operating Services

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)	Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

		Secured Debt	(9)	1/9/2018		14.66%	SF+	10.00%		12/31/2025	5,016	5,016	5,016
		Preferred Member Units	(8)	1/9/2018	2,950							4,280	4,680
												9,296	9,696
Bridge Capital Solutions Corporation	Financial Services and Cash Flow Solutions Provider
		Warrants	(27)	7/25/2016	82					7/25/2026		2,132	—
		Preferred Member Units	(8) (29)	7/25/2016	17,742							1,000	—
												3,132	—
Café Brazil, LLC	Casual Restaurant Group
		Member Units	(8)	6/9/2006	1,233							1,742	1,200

California Splendor Holdings LLC	Processor of Frozen Fruits
		Secured Debt		3/15/2024		14.00%			4.00%	7/29/2026	1,528	1,506	1,506
		Secured Debt		3/30/2018		14.00%			4.00%	7/29/2026	28,908	28,853	28,465
		Preferred Member Units	(8)	7/31/2019	8,671	15.00%			15.00%			10,909	10,909
		Preferred Member Units	(8)	3/30/2018	8,729							16,402	22,215
												57,670	63,095
CBT Nuggets, LLC	Produces and Sells IT Training Certification Videos
		Member Units	(8)	6/1/2006	416							1,300	49,540

Centre Technologies Holdings, LLC	Provider of IT Hardware Services and Software Solutions
		Secured Debt	(9) (25)	1/4/2019			SF+	9.00%		1/4/2028	—	—	—
		Secured Debt	(9)	11/29/2024		13.66%	SF+	9.00%		1/4/2028	25,534	25,492	25,534
		Preferred Member Units		1/4/2019	13,883							6,386	12,410
												31,878	37,944
Chamberlin Holding LLC	Roofing and Waterproofing Specialty Contractor
		Secured Debt	(9) (25)	2/26/2018			SF+	6.00%		2/26/2026	—	(105)	—
		Secured Debt	(9)	2/26/2018		12.74%	SF+	8.00%		2/26/2026	15,620	15,619	15,620
		Member Units	(8)	2/26/2018	4,347							11,440	33,110
		Member Units	(8) (29)	11/2/2018	1,047,146							1,773	3,550
												28,727	52,280
Charps, LLC	Pipeline Maintenance and Construction
		Unsecured Debt		8/26/2020		10.00%				1/31/2026	5,694	5,166	5,694
		Preferred Member Units	(8)	2/3/2017	1,829							1,963	15,580
												7,129	21,274
Clad-Rex Steel, LLC	Specialty Manufacturer of Vinyl-Clad Metal
		Secured Debt	(25)	10/28/2022						1/15/2027	—	—	—
		Secured Debt		12/20/2016		9.00%				1/15/2027	6,760	6,724	6,760

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt		12/20/2016		10.00%				12/20/2036	973	965	973
			Member Units	(8)	12/20/2016	717							7,280	10,990
			Member Units	(29)	12/20/2016	800							509	950
													15,478	19,673
Cody Pools, Inc.		Designer of Residential and Commercial Pools
			Secured Debt	(25)	3/6/2020						12/17/2026	—	(12)	—
			Secured Debt		3/6/2020		12.50%				12/17/2026	39,227	39,207	39,227
			Preferred Member Units	(8) (29)	3/6/2020	587							8,317	67,810
													47,512	107,037
Colonial Electric Company LLC		Provider of Electrical Contracting Services
			Secured Debt	(25)	3/31/2021						3/31/2026	—	—	—
			Secured Debt		3/31/2021		12.00%				3/31/2026	14,310	14,272	14,310
			Preferred Member Units	(8)	3/31/2021	17,280							7,680	13,570
													21,952	27,880
CompareNetworks Topco, LLC		Internet Publishing and Web Search Portals
			Secured Debt	(9)	1/29/2019		13.66%	SF+	9.00%		1/29/2028	2,955	2,903	2,903
			Preferred Member Units		1/29/2019	2,250							3,520	11,260
													6,423	14,163
Compass Systems & Sales, LLC		Designer of End-to-End Material Handling Solutions
			Secured Debt	(25)	11/22/2023						11/22/2028	—	(21)	(21)
			Secured Debt		11/22/2023		13.50%				11/22/2028	17,200	17,067	17,067
			Preferred Equity		11/22/2023	7,454							7,454	7,450
													24,500	24,496
Copper Trail Fund Investments	(12) (13)	Investment Partnership
			LP Interests (CTMH, LP)	(30)	7/17/2017	38.75%							500	500

Cybermedia Technologies, LLC		IT and Digital Services Provider
			Secured Debt	(25)	5/5/2023						5/5/2028	—	—	—
			Secured Debt		5/5/2023		13.00%				5/5/2028	27,300	27,116	27,116
			Preferred Member Units	(8)	5/5/2023	556							15,000	15,000
													42,116	42,116
Datacom, LLC		Technology and Telecommunications Provider
			Secured Debt		3/1/2022		7.50%				12/31/2025	495	493	493
			Secured Debt		3/31/2021		10.00%				12/31/2025	8,082	7,947	7,947
			Preferred Member Units		3/31/2021	9,000							2,610	240
													11,050	8,680
Digital Products Holdings LLC		Designer and Distributor of Consumer Electronics
			Secured Debt	(9)	4/1/2018		14.56%	SF+	10.00%		4/27/2026	12,617	12,561	12,422

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Preferred Member Units	(8)	4/1/2018	3,857							9,501	9,835
													22,062	22,257
Direct Marketing Solutions, Inc.		Provider of Omni-Channel Direct Marketing Services
			Secured Debt	(25)	2/13/2018						2/13/2026	—	(31)	—
			Secured Debt		12/27/2022		14.00%				2/13/2026	23,902	23,859	23,902
			Preferred Stock		2/13/2018	8,400							8,400	17,930
													32,228	41,832
Elgin AcquireCo, LLC		Manufacturer and Distributor of Engine and Chassis Components
			Secured Debt	(9) (25)	10/3/2022			SF+	6.00%		10/3/2027	—	(5)	(5)
			Secured Debt		10/3/2022		12.00%				10/3/2027	18,069	17,969	17,969
			Secured Debt		10/3/2022		9.00%				10/3/2052	6,265	6,207	6,207
			Common Stock		10/3/2022	285							5,726	5,730
			Common Stock	(29)	10/3/2022	939							1,558	3,050
													31,455	32,951
Gamber-Johnson Holdings, LLC		Manufacturer of Ruggedized Computer Mounting Systems
			Secured Debt	(9) (25) (34)	6/24/2016			SF+	7.00%		1/1/2028	—	—	—
			Secured Debt	(9) (34)	11/22/2024		11.00%	SF+	7.00%		1/1/2028	73,126	72,986	73,126
			Member Units	(8)	6/24/2016	9,042							17,692	114,750
													90,678	187,876
Garreco, LLC		Manufacturer and Supplier of Dental Products
			Member Units	(8)	7/15/2013	1,200							1,200	2,060

GRT Rubber Technologies LLC		Manufacturer of Engineered Rubber Products
			Secured Debt		12/21/2018		10.66%	SF+	6.00%		10/29/2026	3,146	3,140	3,146
			Secured Debt		12/19/2014		12.66%	SF+	8.00%		10/29/2026	40,493	40,406	40,493
			Member Units		12/19/2014	5,879							13,065	45,890
													56,611	89,529
Gulf Publishing Holdings, LLC		Energy Industry Focused Media and Publishing
			Secured Debt	(9) (14) (25)	9/29/2017			SF+	9.50%		7/1/2027	—	—	—
			Secured Debt	(14)	7/1/2022		12.50%			12.50%	7/1/2027	2,400	2,299	1,518
			Preferred Equity		7/1/2022	63,720							5,600	—
			Member Units		4/29/2016	3,681							3,681	—
													11,580	1,518
Harris Preston Fund Investments	(12) (13)	Investment Partnership
			LP Interests (2717 MH, L.P.)	(8) (30)	10/1/2017	49.26%							3,345	8,818
			LP Interests (2717 HPP-MS, L.P.)	(30)	3/11/2022	49.26%							256	383

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			LP Interests (2717 GRE-LP, L.P.)	(30)	4/18/2024	43.05%							441	441
			LP Interests (423 COR, L.P.)	(8) (30)	6/2/2022	26.89%							2,900	4,187
													6,942	13,829
Harrison Hydra-Gen, Ltd.		Manufacturer of Hydraulic Generators
			Common Stock	(8)	6/4/2010	107,456							718	7,010

IG Investor, LLC		Military and Other Tactical Gear
			Secured Debt		6/21/2023		13.00%				6/21/2028	1,600	1,572	1,572
			Secured Debt		6/21/2023		13.00%				6/21/2028	35,504	35,257	35,257
			Common Equity		6/21/2023	14,400							14,400	16,230
													51,229	53,059
Jensen Jewelers of Idaho, LLC		Retail Jewelry Store
			Secured Debt	(9) (25)	8/29/2017			P+	6.75%		11/14/2026	—	—	—
			Secured Debt	(9)	11/14/2006		14.50%	P+	6.75%		11/14/2026	1,498	1,498	1,498
			Member Units	(8)	11/14/2006	627							811	11,820
													2,309	13,318
JorVet Holdings, LLC		Supplier and Distributor of Veterinary Equipment and Supplies
			Secured Debt		3/28/2022		12.00%				3/28/2027	23,321	23,216	23,216
			Preferred Equity	(8)	3/28/2022	109,926							10,993	13,180
													34,209	36,396
KBK Industries, LLC		Manufacturer of Specialty Oilfield and Industrial Products
			Secured Debt		2/24/2023		9.00%				2/24/2028	3,700	3,676	3,700
			Member Units		1/23/2006	325							783	25,180
													4,459	28,880
Kickhaefer Manufacturing Company, LLC		Precision Metal Parts Manufacturing
			Secured Debt		10/31/2018		11.50%				10/31/2026	14,999	14,987	14,987
			Secured Debt		10/31/2018		9.00%				10/31/2048	3,959	3,926	3,926
			Preferred Equity		10/31/2018	581							12,240	12,240
			Member Units	(8) (29)	10/31/2018	800							992	2,710
													32,145	33,863
Metalforming Holdings, LLC		Distributor of Sheet Metal Folding and Metal Forming Equipment
			Secured Debt	(25)	10/19/2022						10/19/2025	—	(11)	(11)
			Secured Debt		10/19/2022		9.75%				10/19/2027	20,961	20,844	20,844
			Preferred Equity	(8)	10/19/2022	5,915,585	8.00%			8.00%			5,916	6,397
			Common Stock		10/19/2022	1,537,219							1,537	6,850
													28,286	34,080
MS Private Loan Fund I, LP	(12) (13)	Investment Partnership
			Secured Debt		1/26/2021		5.00%				3/24/2026	1,600	1,600	1,600

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			LP Interests	(8) (30)	1/26/2021	14.51%							14,250	14,034
													15,850	15,634
MS Private Loan Fund II, LP	(12) (13)	Investment Partnership
			Secured Debt	(9) (25)	9/5/2023			SF+	3.00%		3/5/2029	—	(59)	(59)
			LP Interests	(8) (30)	9/5/2023	13.02%							7,449	7,843
													7,390	7,784
MSC Adviser I, LLC	(16)	Third Party Investment Advisory Services
			Member Units	(8)	11/22/2013	100%							29,500	246,000

MSC Income Fund, Inc.	(12) (13)	Business Development Company
			Common Equity	(8)	5/2/2022	1,085,111							17,000	16,810

Mystic Logistics Holdings, LLC		Logistics and Distribution Services Provider for Large Volume Mailers
			Secured Debt	(25)	8/18/2014						1/31/2027	—	—	—
			Secured Debt		8/18/2014		10.00%				1/31/2027	5,746	5,731	5,746
			Common Stock	(8)	8/18/2014	5,873							2,720	26,370
													8,451	32,116
NAPCO Precast, LLC		Precast Concrete Manufacturing
			Member Units		1/31/2008	2,955							2,975	9,050

Nello Industries Investco, LLC		Manufacturer of Steel Poles and Towers For Critical Infrastructure
			Secured Debt	(9) (25)	6/4/2024			SF+	6.50%		6/4/2025	—	(16)	(16)
			Secured Debt		6/4/2024		13.50%				6/4/2029	27,200	26,959	26,959
			Common Equity	(8)	6/4/2024	364,579							12,120	15,560
													39,063	42,503
NexRev LLC		Provider of Energy Efficiency Products & Services
			Secured Debt	(25)	2/28/2018						2/28/2025	—	—	—
			Secured Debt		2/28/2018		9.00%				2/28/2025	9,811	9,803	9,811
			Preferred Member Units	(8)	2/28/2018	103,144,186							8,213	11,910
													18,016	21,721
NRP Jones, LLC		Manufacturer of Hoses, Fittings and Assemblies
			Secured Debt		12/21/2017		12.00%				9/18/2028	2,191	2,178	2,178
			Member Units		12/22/2011	74,761							114	94
			Member Units		12/22/2011	74,761							3,823	2,696
													6,115	4,968
NuStep, LLC		Designer, Manufacturer and Distributor of Fitness Equipment
			Secured Debt	(9)	1/31/2017		11.16%	SF+	6.50%		1/31/2025	3,600	3,600	3,600
			Secured Debt		1/31/2017		12.00%				1/31/2025	18,440	18,439	18,439

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)	Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

		Preferred Member Units		11/2/2022	2,400							2,785	6,000
		Preferred Member Units		1/31/2017	486							11,866	11,550
												36,690	39,589
OMi Topco, LLC	Manufacturer of Overhead Cranes
		Secured Debt		8/31/2021		12.00%				8/31/2026	9,000	8,970	9,000
		Preferred Member Units	(8)	4/1/2008	900							1,080	72,720
												10,050	81,720
Orttech Holdings, LLC	Distributor of Industrial Clutches, Brakes and Other Components
		Secured Debt	(9) (25)	7/30/2021			SF+	11.00%		7/31/2026	—	—	—
		Secured Debt	(9)	7/30/2021		15.66%	SF+	11.00%		7/31/2026	21,960	21,890	21,960
		Preferred Stock	(8) (29)	7/30/2021	10,000							10,000	13,450
												31,890	35,410
Pinnacle TopCo, LLC	Manufacturer and Distributor of Garbage Can Liners, Poly Bags, Produce Bags, and Other Similar Products
		Secured Debt	(25)	12/21/2023						12/31/2028	—	(13)	—
		Secured Debt		12/21/2023		13.00%				12/31/2028	28,640	28,415	28,640
		Preferred Equity	(8)	12/21/2023	440							12,540	18,360
												40,942	47,000
PPL RVs, Inc.	Recreational Vehicle Dealer
		Secured Debt	(9) (25)	10/31/2019			SF+	8.75%		11/15/2027	—	(5)	—
		Secured Debt	(9)	11/15/2016		13.73%	SF+	8.75%		11/15/2027	16,456	16,346	16,456
		Common Stock		6/10/2010	2,000							2,150	17,110
		Common Stock	(8) (29)	6/14/2022	238,421							238	514
												18,729	34,080
Principle Environmental, LLC	Noise Abatement Service Provider
		Secured Debt		7/1/2011		13.00%				11/15/2026	4,897	4,861	4,861
		Preferred Member Units	(8)	2/1/2011	21,806							5,709	12,600
		Common Stock		1/27/2021	1,037							1,200	600
												11,770	18,061
Quality Lease Service, LLC	Provider of Rigsite Accommodation Unit Rentals and Related Services
		Member Units		6/8/2015	1,000							7,546	460

River Aggregates, LLC	Processor of Construction Aggregates
		Member Units	(29)	12/20/2013	1,500							369	9,530

Robbins Bros. Jewelry, Inc.	Bridal Jewelry Retailer
		Secured Debt	(14) (25)	12/15/2021					10.00%	12/15/2026	—	(39)	(39)
		Secured Debt	(14)	12/15/2021		12.50%			10.00%	12/15/2026	33,660	32,624	14,562
		Preferred Equity		12/15/2021	11,070							11,070	—
												43,655	14,523

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)	Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Tedder Industries, LLC	Manufacturer of Firearm Holsters and Accessories
		Secured Debt	(14) (17)	8/31/2018		12.00%			12.00%	8/31/2023	1,840	1,821	1,646
		Secured Debt	(14) (17)	8/31/2018		12.00%			12.00%	8/31/2023	15,200	15,045	3,603
		Preferred Member Units		8/28/2023	6,605							661	—
		Preferred Member Units		2/1/2023	5,643							564	—
		Preferred Member Units		8/31/2018	544							9,245	—
												27,336	5,249
Televerde, LLC	Provider of Telemarketing and Data Services
		Preferred Stock		1/26/2022	248							718	1,794
		Member Units		1/6/2011	460							1,290	4,252
												2,008	6,046
Trantech Radiator Topco, LLC	Transformer Cooling Products and Services
		Secured Debt	(25)	5/31/2019						5/31/2027	—	(1)	(1)
		Secured Debt		5/31/2019		13.50%				5/31/2027	7,920	7,855	7,855
		Common Stock	(8)	5/31/2019	615							4,655	8,570
												12,509	16,424
Victory Energy Operations, LLC	Provider of Industrial and Commercial Combustion Systems
		Secured Debt	(25)	10/3/2024						10/3/2029	—	(33)	(33)
		Secured Debt		10/3/2024		13.00%				10/3/2029	48,251	47,792	47,792
		Preferred Equity		10/3/2024	51,914							22,686	22,686
												70,445	70,445
Volusion, LLC	Provider of Online Software-as-a-Service eCommerce Solutions
		Secured Debt		3/31/2023		10.00%				3/31/2025	2,100	2,100	2,100
		Preferred Member Units		3/31/2023	5,097,595							3,978	7,003
		Preferred Member Units		3/31/2023	142,512							—	—
		Preferred Member Units		1/26/2015	4,876,670							14,000	—
		Common Stock		3/31/2023	1,802,780							2,576	—
												22,654	9,103
VVS Holdco LLC	Omnichannel Retailer of Animal Health Products
		Secured Debt	(9) (25)	12/1/2021			SF+	6.00%		12/1/2025	—	—	—
		Secured Debt		12/1/2021		11.50%				12/1/2026	25,760	25,661	25,661
		Preferred Equity	(8) (29)	12/1/2021	12,240							12,240	12,240
												37,901	37,901
Ziegler’s NYPD, LLC	Casual Restaurant Group
		Secured Debt		12/30/2024		12.00%				12/31/2027	1,750	1,750	1,750
		Preferred Member Units		6/30/2015	17,086							3,154	320
		Warrants	(27)	7/1/2015	587					10/1/2025		600	—
												5,504	2,070

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)		Cost (4)		Fair Value (18)

Subtotal Control investments (74.6% of net assets at fair value)														$	1,415,970	$	2,087,890
Affiliate Investments (6)
AAC Holdings, Inc.	(11)	Substance Abuse Treatment Service Provider
			Secured Debt		1/31/2023		18.00%			18.00%	6/25/2025	$	612	$	611	$	609
			Secured Debt		12/11/2020		18.00%			18.00%	6/25/2025	17,474		17,444		17,365
			Common Stock		12/11/2020	654,743								3,148		—
			Warrants	(27)	12/11/2020	574,598					12/11/2025			—		—
														21,203		17,974
Boccella Precast Products LLC		Manufacturer of Precast Hollow Core Concrete
			Secured Debt		9/23/2021		10.00%				2/28/2027	320		320		266
			Member Units		6/30/2017	2,160,000								2,256		310
														2,576		576
Buca C, LLC		Casual Restaurant Group
			Secured Debt	(14) (17)	8/7/2024		15.00%			15.00%	11/4/2024	6,437		5,652		—
			Secured Debt	(14)	6/28/2024		15.00%			15.00%	4/1/2025	15		—		—
			Secured Debt	(14) (17)	6/30/2015		15.00%			15.00%	8/31/2023	9,554		5,862		—
			Preferred Member Units		6/30/2015	6	6.00%			6.00%				4,770		—
														16,284		—
Career Team Holdings, LLC		Provider of Workforce Training and Career Development Services
			Secured Debt	(9)	12/17/2021		10.56%	SF+	6.00%		12/17/2026	900		887		887
			Secured Debt		12/17/2021		12.50%				12/17/2026	19,440		19,364		19,364
			Common Stock		12/17/2021	450,000								4,500		4,740
														24,751		24,991
CenterPeak Holdings, LLC		Executive Search Services
			Secured Debt	(25)	12/10/2021						12/10/2026	—		(12)		—
			Secured Debt		12/10/2021		15.00%				12/10/2026	21,507		21,418		21,507
			Preferred Equity	(8)	12/10/2021	3,310								3,635		14,550
														25,041		36,057
Classic H&G Holdings, LLC		Provider of Engineered Packaging Solutions
			Preferred Member Units	(8)	3/12/2020	154								—		2,850

Congruent Credit Opportunities Funds	(12) (13)	Investment Partnership
			LP Interests (Congruent Credit Opportunities Fund III, LP)	(8) (30)	2/4/2015	12.49%								2,813		2,276

Connect Telecommunications Solutions Holdings, Inc.	(13)	Value-Added Distributor of Fiber Products and Equipment

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)	PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt		10/9/2024		13.00%			10/9/2029	27,577	27,315	27,315
			Preferred Equity		10/9/2024	22,304						12,596	12,596
												39,911	39,911
DMA Industries, LLC		Distributor of Aftermarket Ride Control Products
			Secured Debt		6/18/2024		12.00%			6/19/2029	560	555	555
			Secured Debt		11/19/2021		12.00%			6/19/2029	16,800	16,722	16,722
			Preferred Equity		11/19/2021	5,944						5,944	5,944
			Preferred Equity	(8)	6/18/2024	3,068	15.00%		15.00%			3,240	3,240
												26,461	26,461
Dos Rios Partners	(12) (13)	Investment Partnership
			LP Interests (Dos Rios Partners, LP)	(30)	4/25/2013	20.24%						6,172	7,708
			LP Interests (Dos Rios Partners - A, LP)	(30)	4/25/2013	6.43%						1,960	2,447
												8,132	10,155
Dos Rios Stone Products LLC	(10)	Limestone and Sandstone Dimension Cut Stone Mining Quarries
			Class A Preferred Units	(29)	6/27/2016	2,000,000						2,000	—

EIG Fund Investments	(12) (13)	Investment Partnership
			LP Interests (EIG Global Private Debt Fund-A, L.P.)	(8)	11/6/2015	5,000,000						416	369

FCC Intermediate Holdco, LLC		Supply Chain Management Services
			Secured Debt		5/28/2024		13.00%			5/29/2029	32,800	29,109	29,109
			Warrants	(27)	5/28/2024	12						3,920	10,840
												33,029	39,949
Flame King Holdings, LLC		Propane Tank and Accessories Distributor
			Preferred Equity	(8)	10/29/2021	9,360						10,400	35,920

Freeport Financial Funds	(12) (13)	Investment Partnership
			LP Interests (Freeport Financial SBIC Fund LP)	(30)	3/23/2015	9.30%						2,580	2,190
			LP Interests (Freeport First Lien Loan Fund III LP)	(8) (30)	7/31/2015	5.95%						1,659	1,263
												4,239	3,453
GFG Group, LLC		Grower and Distributor of a Variety of Plants and Products to Other Wholesalers, Retailers and Garden Centers
			Secured Debt		3/31/2021		8.00%			3/31/2026	8,185	8,164	8,185
			Preferred Member Units	(8)	3/31/2021	226						4,900	10,540
												13,064	18,725

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Gulf Manufacturing, LLC	(13) (21)	Manufacturer of Specialty Fabricated Industrial Piping Products
			Secured Debt	(25)	3/15/2024			SF+	7.63%		3/15/2029	—	(42)	—
			Secured Debt		3/15/2024		12.19%	SF+	7.63%		3/15/2029	39,000	38,676	39,000
			Member Units	(8)	8/31/2007	438							2,980	14,730
			Common Stock		11/18/2024	888							888	888
													42,502	54,618
Harris Preston Fund Investments	(12) (13)	Investment Partnership
			LP Interests (HPEP 3, L.P.)	(30)	8/9/2017	8.22%							2,296	4,472
			LP Interests (HPEP 4, L.P.)	(30)	7/12/2022	11.61%							5,532	5,861
			LP Interests (423 HAR, L.P.)	(30)	6/2/2023	15.60%							750	1,226
													8,578	11,559
Hawk Ridge Systems, LLC		Value-Added Reseller of Engineering Design and Manufacturing Solutions
			Secured Debt	(9)	12/2/2016		10.73%	SF+	6.00%		1/15/2026	2,645	2,644	2,645
			Secured Debt		12/2/2016		12.50%				1/15/2026	45,256	45,200	45,256
			Preferred Member Units	(8)	12/2/2016	226							2,850	20,260
			Preferred Member Units	(29)	12/2/2016	226							150	1,070
													50,844	69,231
Houston Plating and Coatings, LLC		Provider of Plating and Industrial Coating Services
			Unsecured Convertible Debt		5/1/2017		10.00%				4/2/2026	3,000	3,000	2,940
			Member Units	(8)	1/8/2003	322,297							2,352	3,930
													5,352	6,870
Independent Pet Partners Intermediate Holdings, LLC	(10)	Omnichannel Retailer of Specialty Pet Products
			Common Equity		4/7/2023	18,006,407							18,300	20,390

Infinity X1 Holdings, LLC		Manufacturer and Supplier of Personal Lighting Products
			Secured Debt		3/31/2023		12.00%				3/31/2028	15,050	14,954	15,050
			Preferred Equity	(8)	3/31/2023	87,360							4,368	9,080
													19,322	24,130
Integral Energy Services	(10)	Nuclear Power Staffing Services
			Secured Debt	(9)	8/20/2021		12.35%	SF+	7.50%		8/20/2026	12,915	12,828	12,728
			Preferred Equity	(8)	12/7/2023	3,188	10.00%			10.00%			254	452
			Common Stock		8/20/2021	9,968							1,356	550
													14,438	13,730
Iron-Main Investments, LLC		Consumer Reporting Agency Providing Employment Background Checks and Drug Testing
			Secured Debt		8/2/2021		13.00%				1/31/2028	4,514	4,493	4,493
			Secured Debt		9/1/2021		13.00%				1/31/2028	2,940	2,927	2,927

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt		11/15/2021		13.00%				1/31/2028	8,944	8,944	8,944
			Secured Debt		11/15/2021		13.00%				1/31/2028	17,624	17,542	17,542
			Secured Debt		1/31/2023		13.00%				1/31/2028	9,842	9,638	9,638
			Preferred Equity		6/26/2024	711,200	25.00%			25.00%			711	760
			Common Stock		8/3/2021	203,016							2,756	2,850
													47,011	47,154
ITA Holdings Group, LLC		Air Ambulance Services
			Secured Debt	(9)	6/21/2023		13.78%	SF+	9.00%		6/21/2027	1,180	1,169	1,180
			Secured Debt	(9)	6/21/2023		13.78%	SF+	9.00%		6/21/2027	994	981	994
			Secured Debt	(9)	6/21/2023		12.78%	SF+	8.00%		6/21/2027	4,438	3,772	4,438
			Secured Debt	(9)	6/21/2023		14.78%	SF+	10.00%		6/21/2027	4,438	3,772	4,438
			Warrants	(27)	6/21/2023	193,307					6/21/2033		2,091	5,690
													11,785	16,740
Mills Fleet Farm Group, LLC	(10)	Omnichannel Retailer of Work, Farm and Lifestyle Merchandise
			Secured Debt	(9) (25)	12/19/2024			SF+	5.50%		12/31/2026	—	—	—
			Common Equity	(29)	12/19/2024	66,306					12/31/2026		13,840	13,840
													13,840	13,840
MoneyThumb Acquisition, LLC		Provider of Software-as-a-Service Financial File Conversion and Reconciliation
			Secured Debt		8/19/2024		14.00%				8/19/2029	9,600	8,967	8,967
			Preferred Member Units	(8)	8/19/2024	163,282	12.00%			12.00%			1,707	1,707
			Warrants	(27)	8/19/2024	59,368							594	594
													11,268	11,268
Nebraska Vet AcquireCo, LLC		Mixed-Animal Veterinary and Animal Health Product Provider
			Secured Debt	(9) (25)	12/31/2020			SF+	7.00%		5/9/2027	—	(7)	—
			Secured Debt		5/9/2024		12.50%				5/9/2027	4,650	4,479	4,650
			Secured Debt		12/31/2020		12.50%				5/9/2027	62,200	62,085	62,200
			Preferred Member Units	(8)	12/31/2020	6,987							6,987	32,040
													73,544	98,890
OnAsset Intelligence, Inc.		Provider of Transportation Monitoring / Tracking Products and Services
			Secured Debt	(14)	4/18/2011		12.00%			12.00%	9/30/2025	4,415	4,415	457
			Secured Debt	(14)	5/10/2013		12.00%			12.00%	9/30/2025	2,116	2,116	218
			Secured Debt	(14)	3/21/2014		12.00%			12.00%	9/30/2025	983	983	101
			Secured Debt	(14)	5/20/2014		12.00%			12.00%	9/30/2025	964	964	99
			Unsecured Debt	(14)	6/5/2017		10.00%			10.00%	9/30/2025	305	305	305
			Preferred Stock		4/18/2011	912	7.00%			7.00%			1,981	—
			Common Stock		4/15/2021	635							830	—
			Warrants	(27)	4/18/2011	4,699					5/10/2025		1,089	—
													12,683	1,180

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Oneliance, LLC		Construction Cleaning Company
			Preferred Stock	(8)	8/6/2021	1,128							1,128	2,580

RA Outdoors LLC	(10) (13)	Software Solutions Provider for Outdoor Activity Management
			Secured Debt	(9)	4/8/2021		11.74%	SF+	6.75%	11.74%	4/8/2026	1,356	1,352	1,257
			Secured Debt	(9)	4/8/2021		11.74%	SF+	6.75%	11.74%	4/8/2026	14,194	14,145	13,155
			Common Equity		8/12/2024	110							—	—
													15,497	14,412
SI East, LLC		Rigid Industrial Packaging Manufacturing
			Secured Debt		8/31/2018		11.75%				6/16/2028	2,250	2,236	2,250
			Secured Debt	(23)	6/16/2023		12.79%				6/16/2028	67,661	67,611	67,661
			Preferred Member Units	(8)	8/31/2018	165							1,525	13,660
													71,372	83,571
Slick Innovations, LLC		Text Message Marketing Platform
			Secured Debt		9/13/2018		14.00%				12/22/2027	16,320	16,181	16,320
			Common Stock	(8)	9/13/2018	70,000							—	2,440
													16,181	18,760
Student Resource Center, LLC	(10)	Higher Education Services
			Secured Debt		9/11/2024		8.50%			8.50%	12/31/2027	204	204	204
			Secured Debt	(14)	12/31/2022		8.50%			8.50%	12/31/2027	5,327	4,884	1,644
			Preferred Equity		12/31/2022	5,907,649							—	—
													5,088	1,848
Superior Rigging & Erecting Co.		Provider of Steel Erecting, Crane Rental & Rigging Services
			Preferred Member Units		8/31/2020	1,636							4,500	10,530

The Affiliati Network, LLC		Performance Marketing Solutions
			Secured Debt		8/9/2021		10.00%				8/9/2026	400	394	394
			Secured Debt		8/9/2021		10.00%				8/9/2026	5,201	5,182	5,053
			Preferred Stock	(8)	9/1/2023	287,310							287	287
			Preferred Stock	(8)	8/9/2021	1,280,000							6,400	6,400
													12,263	12,134
UnionRock Energy Fund II, LP	(12) (13)	Investment Partnership
			LP Interests	(30)	6/15/2020	11.11%							3,216	4,732

UnionRock Energy Fund III, LP	(12) (13)	Investment Partnership
			LP Interests	(30)	6/6/2023	25.00%							4,767	5,612

UniTek Global Services, Inc.	(11)	Provider of Outsourced Infrastructure Services
			Secured Convertible Debt		1/1/2021		15.00%			15.00%	6/30/2028	2,717	3,257	5,642

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)		Cost (4)		Fair Value (18)

			Secured Convertible Debt		1/1/2021		15.00%			15.00%	6/30/2028	1,281		1,508		2,663
			Preferred Stock	(8)	8/29/2019	1,133,102	20.00%			20.00%				3,181		3,181
			Preferred Stock		8/21/2018	1,731,044	20.00%			20.00%				2,511		4,272
			Preferred Stock		6/30/2017	2,596,567	19.00%			19.00%				3,667		—
			Preferred Stock		1/15/2015	4,935,377	13.50%			13.50%				7,924		—
			Common Stock		4/1/2020	1,075,992								—		—
														22,048		15,758
Urgent DSO LLC		General and Emergency Dentistry Practice
			Secured Debt		2/16/2024		13.50%				2/16/2029	8,800		8,727		8,727
			Preferred Equity	(8)	2/16/2024	4,000	9.00%			9.00%				4,320		4,320
														13,047		13,047
World Micro Holdings, LLC		Supply Chain Management
			Secured Debt		12/12/2022		13.00%				12/12/2027	10,765		10,702		10,702
			Preferred Equity	(8)	12/12/2022	3,845								3,845		3,845
														14,547		14,547
Subtotal Affiliate investments (30.3% of net assets at fair value)														$	743,441	$	846,798
Non-Control/Non-Affiliate Investments (7)
Adams Publishing Group, LLC	(10)	Local Newspaper Operator
			Secured Debt	(9) (33)	3/11/2022		11.00%	SF+	7.00%	1.00%	3/11/2027	$	7,920	$	7,920	$	7,773
			Secured Debt	(9) (33)	3/11/2022		11.00%	SF+	7.00%	1.00%	3/11/2027	18,853		18,826		18,504
														26,746		26,277
AMEREQUIP LLC	(10)	Full Services Provider Including Design, Engineering and Manufacturing of Commercial and Agricultural Equipment
			Common Stock	(8)	8/31/2022	235								1,844		570

American Health Staffing Group, Inc.	(10)	Healthcare Temporary Staffing
			Secured Debt	(9) (25)	11/19/2021			P+	5.00%		11/19/2026	—		(5)		(5)
			Secured Debt	(9)	11/19/2021		12.50%	P+	5.00%		11/19/2026	6,162		6,138		6,162
														6,133		6,157
American Nuts, LLC	(10)	Roaster, Mixer and Packager of Bulk Nuts and Seeds
			Secured Debt	(9)	3/11/2022		14.49%	SF+	9.75%	14.49%	4/10/2026	7,517		7,488		5,985
			Secured Debt	(9)	3/11/2022		14.49%	SF+	9.75%	14.49%	4/10/2026	12,230		12,178		9,738
			Secured Debt	(9) (14)	3/11/2022		16.49%	SF+	11.75%	16.49%	4/10/2026	5,705		5,645		3,502
			Secured Debt	(9) (14)	3/11/2022		16.49%	SF+	11.75%	16.49%	4/10/2026	9,283		9,169		5,697
														34,480		24,922
American Teleconferencing Services, Ltd.	(11)	Provider of Audio Conferencing and Video Collaboration Solutions

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt	(14) (17)	9/17/2021						4/7/2023	3,166	2,989	76
			Secured Debt	(14) (17)	5/19/2016						6/8/2023	15,489	13,757	374
													16,746	450
Ansira Partners II, LLC	(10)	Provider of Data-Driven Marketing Services
			Secured Debt	(9) (25)	7/1/2024			SF+	6.75%		7/1/2029	—	(187)	(187)
			Secured Debt	(9)	7/1/2024		11.25%	SF+	6.75%		7/1/2029	75,490	73,790	74,279
													73,603	74,092
ArborWorks, LLC	(10)	Vegetation Management Services
			Secured Debt		11/6/2023		15.00%			15.00%	11/6/2028	1,997	1,997	1,997
			Secured Debt	(9)	11/6/2023		11.08%	SF+	6.50%	11.08%	11/6/2028	8,054	8,054	8,054
			Preferred Equity		11/6/2023	32,507							14,060	12,552
			Preferred Equity		11/6/2023	32,507							—	—
			Common Equity		11/9/2021	3,898							234	—
													24,345	22,603
Archer Systems, LLC	(10)	Mass Tort Settlement Administration Solutions Provider
			Common Stock		8/11/2022	1,387,832							1,388	2,450

ATS Operating, LLC	(10)	For-Profit Thrift Retailer
			Secured Debt	(9)	1/18/2022		10.85%	SF+	6.00%		1/18/2027	360	360	360
			Secured Debt	(9)	1/18/2022		9.85%	SF+	5.00%		1/18/2027	6,660	6,660	6,660
			Secured Debt	(9)	1/18/2022		11.85%	SF+	7.00%		1/18/2027	6,660	6,660	6,660
			Common Stock		1/18/2022	720,000							720	850
													14,400	14,530
AVEX Aviation Holdings, LLC	(10)	Specialty Aircraft Dealer & MRO Provider
			Secured Debt	(9) (25)	12/23/2022			SF+	7.25%		12/23/2027	—	(90)	(90)
			Secured Debt	(9)	12/23/2022		11.73%	SF+	7.25%		12/23/2027	24,073	23,490	24,073
			Common Equity	(8)	12/15/2021	984							934	896
													24,334	24,879
Berry Aviation, Inc.	(10)	Charter Airline Services
			Preferred Member Units		3/8/2024	286,109							286	—
			Preferred Member Units	(29)	11/12/2019	122,416							—	—
			Preferred Member Units	(29)	7/6/2018	1,548,387							—	—
													286	—
Bettercloud, Inc.	(10)	SaaS Provider of Workflow Management and Business Application Solutions
			Secured Debt	(9) (25)	6/30/2022			SF+	10.25%		6/30/2028	—	(48)	(48)
			Secured Debt	(9)	6/30/2022		15.76%	SF+	10.25%	9.25%	6/30/2028	31,792	31,484	23,984
													31,436	23,936
Binswanger Enterprises, LLC	(10)	Glass Repair and Installation Service Provider

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Member Units		3/10/2017	1,050,000							1,050	650

Bluestem Brands, Inc.	(11)	Multi-Channel Retailer of General Merchandise
			Secured Debt	(9)	1/9/2024		13.17%	SF+	8.50%	12.17%	8/28/2025	202	130	170
			Secured Debt	(9)	10/19/2022		15.00%	P+	7.50%	14.75%	8/28/2025	3,083	3,083	2,605
			Secured Debt	(9)	8/28/2020		13.17%	SF+	8.50%	12.17%	8/28/2025	4,183	3,961	3,535
			Common Stock		10/1/2020	723,184							1	—
			Warrants	(27)	10/19/2022	163,295					10/19/2032		1,036	—
													8,211	6,310
Bond Brand Loyalty ULC	(10) (13) (21)	Provider of Loyalty Marketing Services
			Secured Debt	(9)	5/1/2023		11.65%	SF+	7.00%		5/1/2028	571	552	571
			Secured Debt	(9)	5/1/2023		10.74%	SF+	6.00%		5/1/2028	6,341	6,256	6,341
			Secured Debt	(9)	5/1/2023		12.74%	SF+	8.00%		5/1/2028	6,341	6,256	6,341
			Preferred Equity		5/1/2023	571							571	500
			Common Equity		5/1/2023	571							—	—
													13,635	13,753
BP Loenbro Holdings Inc.	(10)	Specialty Industrial Maintenance Services
			Secured Debt	(9) (32)	2/1/2024		10.68%	SF+	6.25%		2/1/2029	1,199	1,154	1,199
			Secured Debt	(9) (25)	2/1/2024			SF+	6.25%		2/1/2029	—	(22)	(22)
			Secured Debt	(9)	2/1/2024		10.92%	SF+	6.25%		2/1/2029	26,173	25,739	26,173
			Common Equity		2/1/2024	2,333,333							2,333	3,620
													29,204	30,970
Brainworks Software, LLC	(10)	Advertising Sales and Newspaper Circulation Software
			Secured Debt	(9) (14) (17)	8/12/2014		15.25%	P+	7.25%		7/22/2019	761	761	761
			Secured Debt	(9) (14) (17)	8/12/2014		15.25%	P+	7.25%		7/22/2019	7,056	7,056	750
													7,817	1,511
Brightwood Capital Fund Investments	(12) (13)	Investment Partnership
			LP Interests (Brightwood Capital Fund III, LP)	(30)	7/21/2014	1.59%							5,415	3,120
			LP Interests (Brightwood Capital Fund IV, LP)	(8) (30)	10/26/2016	0.59%							4,014	4,016
			LP Interests (Brightwood Capital Fund V, LP)	(8) (30)	7/12/2021	0.72%							3,500	3,809
													12,929	10,945
Burning Glass Intermediate Holding Company, Inc.	(10)	Provider of Skills-Based Labor Market Analytics
			Secured Debt	(9) (25)	6/14/2021			SF+	5.00%		6/10/2026	—	(11)	—
			Secured Debt	(9)	6/14/2021		9.46%	SF+	5.00%		6/10/2028	17,915	17,755	17,915
													17,744	17,915

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

CAI Software LLC		Provider of Specialized Enterprise Resource Planning Software
			Preferred Equity		12/13/2021	2,142,167							2,142	2,417
			Preferred Equity		12/13/2021	596,176							—	—
													2,142	2,417
CaseWorthy, Inc.	(10)	SaaS Provider of Case Management Solutions
			Common Equity		12/30/2022	245,926							246	490

Channel Partners Intermediateco, LLC	(10)	Outsourced Consumer Services Provider
			Secured Debt	(9) (32)	2/7/2022		11.53%	SF+	7.00%		2/7/2027	5,075	4,960	4,830
			Secured Debt	(9)	2/7/2022		11.93%	SF+	7.00%		2/7/2027	36,167	35,856	34,431
			Secured Debt	(9)	6/24/2022		11.93%	SF+	7.00%		2/7/2027	2,004	1,987	1,908
			Secured Debt	(9)	3/27/2023		11.93%	SF+	7.00%		2/7/2027	4,843	4,774	4,610
													47,577	45,779
Clarius BIGS, LLC	(10)	Prints & Advertising Film Financing
			Secured Debt	(14) (17)	9/23/2014						1/5/2015	2,649	2,649	19

Computer Data Source, LLC	(10)	Third Party Maintenance Provider to the Data Center Ecosystem
			Secured Debt	(9) (32)	8/6/2021		12.93%	SF+	8.25%		8/6/2026	7,837	7,754	7,341
			Secured Debt	(9) (25)	3/29/2024			SF+	8.25%		8/6/2026	—	(113)	(113)
			Secured Debt	(9)	8/6/2021		12.92%	SF+	8.25%		8/6/2026	18,968	18,850	17,769
													26,491	24,997
Coregistics Buyer LLC	(10) (13) (21)	Contract Packaging Service Provider
			Secured Debt	(9) (32)	6/29/2024		10.39%	SF+	6.00%		6/28/2029	1,669	1,590	1,639
			Secured Debt	(9)	6/29/2024		10.36%	SF+	6.00%		6/28/2029	10,704	10,474	10,507
			Secured Debt	(9)	8/15/2024		10.40%	SF+	6.00%		6/28/2029	7,118	6,987	6,987
			Secured Debt	(9)	6/29/2024		10.61%	SF+	6.25%		6/28/2029	32,031	31,313	30,165
													50,364	49,298
CQ Fluency, LLC	(10)	Global Language Services Provider
			Secured Debt	(9) (25)	12/27/2023			SF+	6.75%		6/27/2027	—	(47)	(47)
			Secured Debt	(9) (25)	12/27/2023			SF+	6.75%		6/27/2027	—	(47)	(47)
			Secured Debt	(9)	12/27/2023		11.18%	SF+	6.75%		6/27/2027	10,828	10,600	10,754
													10,506	10,660
Creative Foam Corporation	(10)	Manufacturer of Custom Engineered Die Cut, Formed Foam, Nonwoven, and Multi-material Component Solutions for the Automotive and Healthcare Markets
			Secured Debt	(9) (25)	6/27/2024			SF+	5.75%		6/27/2029	—	(272)	(272)
			Secured Debt	(9)	6/27/2024		10.11%	SF+	5.75%		6/27/2029	106,280	104,348	105,229
													104,076	104,957

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Dalton US Inc.	(10)	Provider of Supplemental Labor Services
			Common Stock		8/16/2022	515							720	690

DTE Enterprises, LLC	(10)	Industrial Powertrain Repair and Services
			Class AA Preferred Member Units (non-voting)	(8)	4/13/2018		10.00%			10.00%			1,316	438
			Class A Preferred Member Units		4/13/2018	776,316	8.00%			8.00%			776	—
													2,092	438
Dynamic Communities, LLC	(10)	Developer of Business Events and Online Community Groups
			Secured Debt	(9)	12/20/2022		11.46%	SF+	7.00%	11.46%	12/31/2026	2,318	2,160	2,220
			Secured Debt	(9)	12/20/2022		13.46%	SF+	9.00%	13.46%	12/31/2026	2,413	2,179	2,219
			Preferred Equity		12/20/2022	125,000							128	60
			Preferred Equity		12/20/2022	2,376,241							—	—
			Common Equity		12/20/2022	1,250,000							—	—
													4,467	4,499
Eastern Wholesale Fence LLC	(10)	Manufacturer and Distributor of Residential and Commercial Fencing Solutions
			Secured Debt	(9)	11/19/2020		12.74%	SF+	8.00%		10/30/2025	2,826	2,805	2,714
			Secured Debt	(9)	11/19/2020		12.74%	SF+	8.00%		10/30/2025	4,374	4,355	4,201
			Secured Debt	(9)	11/19/2020		12.74%	SF+	8.00%		10/30/2025	8,725	8,683	8,380
			Secured Debt	(9)	4/20/2021		12.74%	SF+	8.00%		10/30/2025	1,809	1,802	1,738
			Secured Debt	(9)	10/14/2021		12.74%	SF+	8.00%		10/30/2025	9,901	9,861	9,509
													27,506	26,542
Emerald Technologies Acquisition Co, Inc.	(11)	Design & Manufacturing
			Secured Debt	(9)	2/10/2022		10.71%	SF+	6.25%		12/29/2027	9,587	9,434	7,670

EnCap Energy Fund Investments	(12) (13)	Investment Partnership
			LP Interests (EnCap Energy Capital Fund VIII, L.P.)	(8) (30)	1/22/2015	0.14%							3,542	1,754
			LP Interests (EnCap Energy Capital Fund VIII Co- Investors, L.P.)	(8) (30)	1/21/2015	0.38%							1,983	846
			LP Interests (EnCap Energy Capital Fund IX, L.P.)	(8) (30)	1/22/2015	0.10%							3,251	1,088
			LP Interests (EnCap Energy Capital Fund X, L.P.)	(8) (30)	3/25/2015	0.15%							6,963	5,051
			LP Interests (EnCap Energy Capital Fund XII, L.P.)	(8) (30)	8/31/2023	0.19%							2,717	3,525

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			LP Interests (EnCap Flatrock Midstream Fund II, L.P.)	(8) (30)	3/30/2015	0.84%							5,110	1,514
			LP Interests (EnCap Flatrock Midstream Fund III, L.P.)	(8) (30)	3/27/2015	0.25%							4,312	3,756
													27,878	17,534
Escalent, Inc.	(10)	Market Research and Consulting Firm
			Secured Debt	(9) (25)	4/7/2023			SF+	8.00%		4/7/2029	—	(28)	(28)
			Secured Debt	(9)	10/2/2024		12.39%	SF+	8.00%		4/7/2029	1,382	1,359	1,359
			Secured Debt	(9)	4/7/2023		12.43%	SF+	8.00%		4/7/2029	26,048	25,488	26,048
			Common Equity	(8)	4/7/2023	649,794							663	910
													27,482	28,289
Event Holdco, LLC	(10)	Event and Learning Management Software for Healthcare Organizations and Systems
			Secured Debt	(9)	12/22/2021		12.59%	SF+	8.00%		12/22/2026	3,692	3,678	3,692
			Secured Debt	(9)	12/22/2021		12.59%	SF+	8.00%	6.00%	12/22/2026	47,633	47,457	47,633
													51,135	51,325
Fuse, LLC	(11)	Cable Networks Operator
			Secured Debt	(8)	6/30/2019		12.00%				12/31/2026	1,810	1,810	932
			Common Stock		6/30/2019	10,429							256	—
													2,066	932
Garyline, LLC	(10)	Manufacturer of Consumer Plastic Products
			Secured Debt	(9) (32)	11/10/2023		11.29%	SF+	6.75%		11/10/2028	8,118	7,915	8,118
			Secured Debt	(9)	11/10/2023		11.34%	SF+	6.75%		11/10/2028	32,146	31,401	32,146
			Common Equity		11/10/2023	705,882							706	500
													40,022	40,764
GradeEight Corp.	(10)	Distributor of Maintenance and Repair Parts
			Secured Debt	(9) (25)	10/4/2024			SF+	7.25%		10/4/2029	—	(95)	(95)
			Secured Debt	(9) (25)	10/4/2024			SF+	7.25%		10/4/2029	—	(48)	(48)
			Secured Debt	(9) (26)	10/4/2024		11.74%	SF+	7.25%		10/4/2029	31,603	31,002	31,002
			Common Equity		10/4/2024	1,365							1,365	1,365
													32,224	32,224
GS HVAM Intermediate, LLC	(10)	Specialized Food Distributor
			Secured Debt	(9) (32)	10/18/2019		11.12%	SF+	6.50%		2/28/2026	1,864	1,853	1,864
			Secured Debt	(9)	10/18/2019		11.24%	SF+	6.50%		2/28/2026	10,509	10,460	10,509
			Secured Debt	(9)	9/15/2023		11.24%	SF+	6.50%		2/28/2026	942	939	942
			Secured Debt	(9)	12/22/2023		11.24%	SF+	6.50%		2/28/2026	225	223	225
			Secured Debt	(9)	8/22/2024		10.98%	SF+	6.50%		2/28/2026	6,076	6,040	6,076
													19,515	19,616
GULF PACIFIC ACQUISITION, LLC	(10)	Rice Processor and Merchandiser

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt	(9) (32)	9/30/2022		10.50%	SF+	6.00%		9/30/2028	707	694	662
			Secured Debt	(9)	9/30/2022		10.55%	SF+	6.00%		9/30/2028	298	286	279
			Secured Debt	(9)	9/30/2022		10.46%	SF+	6.00%		9/30/2028	3,578	3,533	3,350
													4,513	4,291
HDC/HW Intermediate Holdings	(10)	Managed Services and Hosting Provider
			Secured Debt	(9)	3/7/2024		8.75%	SF+	3.50%	2.50%	6/21/2026	2,423	2,327	2,327
			Secured Debt	(14)	3/7/2024		2.50%			2.50%	6/21/2026	1,626	713	418
			Common Equity		3/7/2024	64,029							—	—
													3,040	2,745
HEADLANDS OP-CO LLC	(10)	Clinical Trial Sites Operator
			Secured Debt	(9) (25)	8/1/2022			SF+	6.50%		8/1/2027	—	(35)	(35)
			Secured Debt	(9)	8/1/2022		10.86%	SF+	6.50%		8/1/2027	6,666	6,586	6,666
			Secured Debt	(9)	6/3/2024		10.86%	SF+	6.50%		8/1/2027	4,713	4,597	4,713
			Secured Debt	(9)	8/1/2022		10.86%	SF+	6.50%		8/1/2027	16,453	16,283	16,453
			Secured Debt	(9)	6/3/2024		10.86%	SF+	6.50%		8/1/2027	8,039	7,973	8,039
													35,404	35,836
Hornblower Sub, LLC	(10)	Marine Tourism and Transportation
			Secured Debt	(9) (32)	7/3/2024		9.92%	SF+	5.50%		7/3/2029	2,429	2,385	2,407
			Secured Debt	(9)	7/3/2024		10.11%	SF+	5.50%		7/3/2029	30,979	30,701	30,701
													33,086	33,108
HOWLCO LLC	(11) (13) (21)	Provider of Accounting and Business Development Software to Real Estate End Markets
			Secured Debt	(9)	8/19/2021		11.28%	SF+	6.50%	3.50%	10/23/2026	26,241	26,241	26,096

Hybrid Promotions, LLC	(10)	Wholesaler of Licensed, Branded and Private Label Apparel
			Secured Debt	(9)	6/30/2021		13.10%	SF+	8.25%		12/31/2027	7,200	7,073	7,200

IG Parent Corporation	(11)	Software Engineering
			Secured Debt	(9) (25)	7/30/2021			SF+	5.75%		7/30/2026	—	(12)	—
			Secured Debt	(9)	7/30/2021		10.21%	SF+	5.75%		7/30/2028	10,154	10,073	10,154
			Secured Debt	(9)	7/30/2021		10.21%	SF+	5.75%		7/30/2028	4,903	4,861	4,903
													14,922	15,057
Imaging Business Machines, L.L.C.	(10)	Technology Hardware & Equipment
			Secured Debt	(9) (32)	6/8/2023		11.39%	SF+	7.00%		6/30/2028	1,581	1,518	1,581
			Secured Debt	(9)	6/8/2023		11.62%	SF+	7.00%		6/30/2028	20,559	20,133	20,559
			Common Equity		6/8/2023	849							1,166	1,020
													22,817	23,160
Implus Footcare, LLC	(10)	Provider of Footwear and Related Accessories
			Secured Debt	(9)	6/1/2017		13.73%	SF+	7.75%	1.50%	7/31/2025	18,674	18,674	15,892

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)


Insight Borrower Corporation	(10)	Test, Inspection, and Certification Instrument Provider
			Secured Debt	(9) (25)	7/19/2023			SF+	6.25%		7/19/2028	—	(54)	(54)
			Secured Debt	(9) (25)	7/19/2023			SF+	6.25%		7/19/2029	—	(47)	(47)
			Secured Debt	(9)	7/19/2023		10.87%	SF+	6.25%		7/19/2029	14,262	13,936	13,539
			Common Equity		7/19/2023	131,100							656	320
													14,491	13,758
Inspire Aesthetics Management, LLC	(10)	Surgical and Non-Surgical Plastic Surgery and Aesthetics Provider
			Secured Debt	(9) (32)	4/3/2023		14.69%	SF+	10.00%	2.00%	4/3/2028	791	776	725
			Secured Debt	(9)	4/3/2023		14.58%	SF+	10.00%	2.00%	4/3/2028	7,240	7,118	6,636
			Secured Debt	(9)	6/14/2023		14.58%	SF+	10.00%	2.00%	4/3/2028	2,912	2,867	2,669
			Common Equity		4/3/2023	166,504							452	27
													11,213	10,057
Interface Security Systems, L.L.C	(10)	Commercial Security & Alarm Services
			Secured Debt	(17) (32)	12/9/2021		14.54%	SF+	10.00%	14.54%	8/7/2023	2,075	2,075	1,580
			Secured Debt	(9) (14) (17)	8/7/2019		11.67%	SF+	7.00%	11.67%	8/7/2023	7,313	7,237	13
			Common Stock		12/7/2021	2,143							—	—
													9,312	1,593
Invincible Boat Company, LLC.	(10)	Manufacturer of Sport Fishing Boats
			Secured Debt	(9) (32)	8/28/2019		12.01%	SF+	7.50%		12/31/2026	1,037	1,033	995
			Secured Debt	(9)	8/28/2019		12.01%	SF+	7.50%		12/31/2026	16,771	16,703	16,098
													17,736	17,093
Isagenix International, LLC	(11)	Direct Marketer of Health & Wellness Products
			Secured Debt	(9)	4/13/2023		11.25%	SF+	6.60%	8.75%	4/14/2028	3,159	2,958	663
			Common Equity		4/13/2023	198,743							—	—
													2,958	663
Island Pump and Tank, LLC	(10)	Provider of Facility and Maintenance Services to Fuel Retailers in Northeast U.S.
			Secured Debt	(9) (25)	5/20/2024			SF+	6.50%		5/17/2029	—	(5)	(5)
			Secured Debt	(9)	5/20/2024		10.35%	SF+	5.50%		5/17/2029	1,735	1,708	1,722
			Secured Debt	(9)	5/20/2024		11.35%	SF+	6.50%		5/17/2029	1,735	1,708	1,722
			Secured Debt	(9)	5/20/2024		12.35%	SF+	7.50%		5/17/2029	1,735	1,708	1,722
													5,119	5,161
Jackmont Hospitality, Inc.	(10)	Franchisee of Casual Dining Restaurants
			Secured Debt	(9) (26)	10/26/2022		12.18%	SF+	7.50%		11/4/2026	792	783	792
			Secured Debt	(9) (26)	2/27/2024		12.19%	SF+	7.50%		11/4/2026	627	620	627
			Secured Debt	(9)	2/27/2024		12.18%	SF+	7.50%		11/4/2026	60	48	60
			Secured Debt	(9)	11/8/2021		12.18%	SF+	7.50%		11/4/2026	1,843	1,821	1,843

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Preferred Equity		11/8/2021	2,826,667							110	870
													3,382	4,192
JDC Power Services, LLC	(10)	Provider of Electrical Equipment and Maintenance Services for Datacenters
			Secured Debt	(9) (25)	6/28/2024			SF+	6.50%		6/28/2029	—	(162)	(162)
			Secured Debt	(9)	6/28/2024		10.83%	SF+	6.50%		6/28/2029	60,965	59,573	60,336
													59,411	60,174
Joerns Healthcare, LLC	(11)	Manufacturer and Distributor of Health Care Equipment & Supplies
			Secured Debt	(9) (14) (17)	8/21/2019		21.59%	SF+	16.00%	21.59%	8/21/2024	1,134	1,134	—
			Secured Debt	(9) (14) (17)	8/21/2019		21.59%	SF+	16.00%	21.59%	8/21/2024	1,091	1,091	—
			Secured Debt	(9)	3/30/2024		13.21%	SF+	8.75%	6.00%	3/29/2029	1,770	1,770	1,770
			Secured Debt	(9)	3/30/2024		13.18%	SF+	8.75%	13.18%	3/29/2029	1,314	1,314	1,314
			Common Stock		8/21/2019	472,579							4,429	—
			Common Stock		3/29/2024	5,461,019							200	140
													9,938	3,224
JTI Electrical & Mechanical, LLC	(10)	Electrical, Mechanical and Automation Services
			Secured Debt	(9) (32)	12/22/2021		12.72%	SF+	8.00%		12/22/2026	8,421	8,354	7,977
			Secured Debt	(9)	12/22/2021		12.58%	SF+	8.00%		12/22/2026	35,763	35,471	33,879
			Secured Debt	(9)	2/1/2024		12.58%	SF+	8.00%		12/22/2026	3,347	3,278	3,176
			Common Equity		12/22/2021	1,684,211							1,684	300
													48,787	45,332
KMS, LLC	(10)	Wholesaler of Closeout and Value-priced Products
			Secured Debt	(9) (14)	10/4/2021		14.50%	SF+	9.75%		10/4/2026	1,028	1,002	662
			Secured Debt	(9)	11/27/2024		14.23%	SF+	9.75%	14.23%	10/4/2026	450	450	450
			Secured Debt	(9)	11/27/2024		14.23%	SF+	9.75%	14.23%	10/4/2026	440	440	440
			Secured Debt	(9) (14)	10/4/2021		14.50%	SF+	9.75%		10/4/2026	7,410	7,340	4,779
													9,232	6,331
Lightbox Holdings, L.P.	(11)	Provider of Commercial Real Estate Software
			Secured Debt		5/9/2019		9.44%	SF+	5.00%		5/9/2026	15,525	15,450	15,059

LKCM Headwater Investments I, L.P.	(12) (13)	Investment Partnership
			LP Interests	(30)	1/25/2013	2.27%							1,746	2,926

LL Management, Inc.	(10)	Medical Transportation Service Provider
			Secured Debt	(9)	9/17/2024		11.89%	SF+	7.25%		12/31/2025	1,156	1,156	1,156
			Secured Debt	(9)	5/2/2019		11.92%	SF+	7.25%		12/31/2025	8,575	8,513	8,575
			Secured Debt	(9)	5/2/2019		11.71%	SF+	7.25%		12/31/2025	5,485	5,444	5,485
			Secured Debt	(9)	11/20/2020		11.71%	SF+	7.25%		12/31/2025	2,878	2,857	2,878

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

			Secured Debt	(9)	2/26/2021		11.92%	SF+	7.25%		12/31/2025	1,118	1,110	1,118
			Secured Debt	(9)	5/12/2022		11.71%	SF+	7.25%		12/31/2025	11,326	11,242	11,326
													30,322	30,538
LLFlex, LLC	(10)	Provider of Metal-Based Laminates
			Secured Debt	(9)	8/16/2021		12.74%	SF+	8.00%	3.00%	8/16/2026	4,133	4,083	3,316

Logix Acquisition Company, LLC	(10)	Competitive Local Exchange Carrier
			Secured Debt	(9) (17)	1/8/2018		12.25%	P+	4.25%		12/22/2024	24,809	24,809	19,739

Looking Glass Investments, LLC	(12) (13)	Specialty Consumer Finance
			Member Units		7/1/2015	3							125	25

Mako Steel, LP	(10)	Self-Storage Design & Construction
			Secured Debt	(9) (25)	3/15/2021			SF+	7.50%		3/15/2026	—	(15)	—
			Secured Debt	(9)	3/28/2024		12.00%	SF+	7.50%		3/15/2026	18,973	18,822	18,973
													18,807	18,973
Microbe Formulas, LLC	(10)	Nutritional Supplements Provider
			Secured Debt	(9) (25)	4/4/2022			SF+	5.75%		4/3/2028	—	(39)	(39)
			Secured Debt	(9)	11/20/2024		10.22%	SF+	5.75%		4/3/2028	11,135	10,985	11,135
			Secured Debt	(9)	4/4/2022		10.21%	SF+	5.75%		4/3/2028	19,828	19,606	19,828
													30,552	30,924
Mini Melts of America, LLC	(10)	Manufacturer and Distributor of Branded Premium Beaded Ice Cream
			Secured Debt	(9) (32)	11/30/2023		10.74%	SF+	6.25%		11/30/2028	575	541	575
			Secured Debt	(9) (26)	11/30/2023		10.77%	SF+	6.25%		11/30/2028	1,315	1,288	1,315
			Secured Debt	(9)	11/30/2023		9.76%	SF+	5.25%		11/30/2028	4,904	4,811	4,904
			Secured Debt	(9)	11/30/2023		11.76%	SF+	7.25%		11/30/2028	4,904	4,807	4,904
			Common Equity		11/30/2023	515,576							516	430
													11,963	12,128
MonitorUS Holding, LLC	(10) (13) (21)	SaaS Provider of Media Intelligence Services
			Secured Debt	(9)	5/24/2022		11.59%	SF+	7.00%		5/24/2027	4,101	4,065	3,907
			Secured Debt	(9)	5/24/2022		11.59%	SF+	7.00%		5/24/2027	10,767	10,666	11,079
			Secured Debt	(9)	5/24/2022		11.59%	SF+	7.00%		5/24/2027	18,103	17,943	18,103
			Unsecured Debt		11/14/2023		8.00%			8.00%	3/31/2025	114	114	114
			Unsecured Debt		3/15/2024		8.00%			8.00%	6/30/2025	54	54	54
			Unsecured Debt		9/25/2024		8.00%			8.00%	12/21/2025	107	107	107
			Common Stock		8/30/2022	44,445,814							889	796
													33,838	34,160
NinjaTrader, LLC	(10)	Operator of Futures Trading Platform
			Secured Debt	(9) (25)	12/18/2019			SF+	6.50%		12/18/2026	—	(6)	(6)
			Secured Debt	(9)	12/18/2019		11.24%	SF+	6.50%		12/18/2026	28,243	28,016	28,243

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

													28,010	28,237
Obra Capital, Inc.	(10)	Provider of Asset Management Services Specialized in Insurance-Linked Strategies
			Secured Debt	(9) (25)	6/21/2024			SF+	7.50%		12/21/2028	—	(4)	(4)
			Secured Debt	(9)	6/21/2024		11.97%	SF+	7.50%		6/21/2029	26,352	25,653	25,884
													25,649	25,880
OnPoint Industrial Services, LLC	(10)	Environmental & Facilities Services
			Secured Debt	(9)	12/18/2024		11.35%	SF+	7.00%		11/16/2027	1,400	1,386	1,386
			Secured Debt	(9)	4/1/2024		11.33%	SF+	7.00%		11/16/2027	3,880	3,850	3,850
													5,236	5,236
Ospemifene Royalty Sub LLC	(10)	Estrogen-Deficiency Drug Manufacturer and Distributor
			Secured Debt	(14)	7/8/2013						11/15/2026	4,398	4,398	12

Peaches Holding Corporation		Wholesale Provider of Consumer Packaging Solutions
			Common Equity		5/22/2024	3,226							7,221	4,540

Power System Solutions	(10)	Backup Power Generation
			Secured Debt	(9) (25)	6/7/2023			SF+	6.50%		6/7/2028	—	(63)	(63)
			Secured Debt	(9)	6/7/2023		10.86%	SF+	6.50%		6/7/2028	6,124	5,988	6,124
			Secured Debt	(9)	6/7/2023		10.90%	SF+	6.50%		6/7/2028	18,233	17,858	18,233
			Common Equity		6/7/2023	1,234							1,234	3,800
													25,017	28,094
PrimeFlight Aviation Services	(10)	Air Freight & Logistics
			Secured Debt	(9)	5/1/2023		10.58%	SF+	5.50%		5/1/2029	7,880	7,668	7,880
			Secured Debt	(9)	9/7/2023		9.83%	SF+	5.50%		5/1/2029	752	730	752
			Secured Debt	(9)	1/30/2024		9.83%	SF+	5.50%		5/1/2029	756	740	756
			Secured Debt	(9)	6/28/2024		9.58%	SF+	5.25%		5/1/2029	859	848	859
													9,986	10,247
PTL US Bidco, Inc	(10) (13) (21)	Manufacturers of Equipment, Including Drilling Rigs and Equipment, and Providers of Supplies and Services to Companies Involved in the Drilling, Evaluation and Completion of Oil and Gas Wells
			Secured Debt	(9)	8/19/2022		13.03%	SF+	8.25%		8/19/2027	6,838	6,739	6,769
			Secured Debt	(9)	8/19/2022		13.03%	SF+	8.25%		8/19/2027	17,811	17,615	17,631
													24,354	24,400
Purge Rite, LLC	(10)	HVAC Flushing and Filtration Services
			Preferred Equity		10/2/2023	32,813							3,248	3,248
			Common Equity		4/1/2024	32,813							33	2,060

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

													3,281	5,308
Richardson Sales Solutions	(10)	Business Services
			Secured Debt	(9) (32)	8/24/2023		11.22%	SF+	6.75%		8/24/2028	3,517	3,443	3,517
			Secured Debt	(9)	8/24/2023		11.38%	SF+	6.75%		8/24/2028	34,046	33,201	34,046
			Secured Debt	(9)	9/10/2024		11.43%	SF+	6.75%		8/24/2028	22,101	21,694	22,101
													58,338	59,664
Roof Opco, LLC	(10)	Residential Re-Roofing/Repair
			Secured Debt	(9) (25)	8/27/2021			SF+	8.00%		8/27/2026	—	(5)	—
			Secured Debt	(9)	8/27/2021		11.85%	SF+	7.00%		8/27/2026	3,376	3,335	3,071
			Secured Debt	(9)	8/27/2021		13.85%	SF+	9.00%		8/27/2026	3,376	3,335	3,052
													6,665	6,123
Rug Doctor, LLC.	(10)	Carpet Cleaning Products and Machinery
			Secured Debt	(9)	7/16/2021		12.52%	SF+	8.00%	2.00%	11/16/2025	5,888	5,879	5,888
			Secured Debt	(9)	7/16/2021		12.52%	SF+	8.00%	2.00%	11/16/2025	7,449	7,421	7,449
													13,300	13,337
South Coast Terminals Holdings, LLC	(10)	Specialty Toll Chemical Manufacturer
			Secured Debt	(9) (25)	8/8/2024			SF+	5.25%		8/8/2029	—	—	—
			Secured Debt	(9)	8/8/2024		9.71%	SF+	5.25%		8/8/2029	53,320	52,939	53,320
			Common Equity		12/10/2021	864							864	885
													53,803	54,205
SPAU Holdings, LLC	(10)	Digital Photo Product Provider
			Secured Debt	(9) (25)	7/1/2022			SF+	7.50%		7/1/2027	—	(32)	—
			Secured Debt	(9)	7/1/2022		11.98%	SF+	7.50%		7/1/2027	15,569	15,410	15,569
			Common Stock		7/1/2022	638,710							639	610
													16,017	16,179
Team Public Choices, LLC	(11)	Home-Based Care Employment Service Provider
			Secured Debt		12/22/2020		9.65%	SF+	5.00%		12/18/2027	14,683	14,522	14,781

TEC Services, LLC	(10)	Provider of Janitorial Service for Food Retailers
			Secured Debt	(9) (25)	12/31/2024			SF+	5.75%		12/31/2029	—	(125)	(125)
			Secured Debt	(9) (25)	12/31/2024			SF+	5.75%		12/31/2029	—	(94)	(94)
			Secured Debt	(9)	12/31/2024		10.13%	SF+	5.75%		12/31/2029	42,333	41,709	41,709
													41,490	41,490
Tectonic Financial, LLC		Financial Services Organization
			Common Stock	(8)	5/15/2017	200,000							2,000	4,720

Tex Tech Tennis, LLC	(10)	Sporting Goods & Textiles
			Preferred Equity	(29)	7/7/2021	1,000,000							1,000	2,290

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)	Fair Value (18)

Titan Meter Midco Corp.	(10)	Value Added Distributor of a Variety of Metering and Measurement Products and Solutions to the Energy Industry
			Secured Debt	(9) (25)	3/11/2024			SF+	6.50%		3/11/2029	—	(105)	(105)
			Secured Debt	(9)	3/11/2024		10.83%	SF+	6.50%		3/11/2029	33,927	32,937	33,927
			Preferred Equity		3/11/2024	1,218,750	8.00%			8.00%			1,219	1,400
													34,051	35,222
U.S. TelePacific Corp.	(11)	Provider of Communications and Managed Services
			Secured Debt	(9) (14)	6/1/2023		11.90%	SF+	7.40%	6.00%	5/2/2027	9,825	3,257	3,910
			Secured Debt	(14)	6/1/2023						5/2/2027	1,003	20	—
													3,277	3,910
UPS Intermediate, LLC	(10)	Provider of Maintenance, Repair, and Overhaul Services for Industrial Equipment Serving the Refining, Chemical, Midstream, Renewables, Power, and Utilities End Markets
			Secured Debt	(9)	7/29/2024		10.36%	SF+	6.00%		7/27/2029	43,339	42,558	42,904
			Common Equity		7/29/2024	1,443,299							1,443	1,443
													44,001	44,347
UserZoom Technologies, Inc.	(10)	Provider of User Experience Research Automation Software
			Secured Debt	(9)	1/11/2023		12.75%	SF+	7.50%		4/5/2029	4,000	3,918	4,000

Veregy Consolidated, Inc.	(11)	Energy Service Company
			Secured Debt	(9) (25)	11/9/2020			SF+	5.25%		11/3/2025	—	(185)	(185)
			Secured Debt	(9)	11/9/2020		10.85%	SF+	6.00%		11/3/2027	17,659	17,475	17,681
													17,290	17,496
Vistar Media, Inc.	(10)	Operator of Digital Out-of-Home Advertising Platform
			Preferred Stock		4/3/2019	70,207							767	4,676

Vitesse Systems	(10)	Component Manufacturing and Machining Platform
			Secured Debt		12/22/2023		11.55%	SF+	7.00%		12/22/2028	5,795	5,673	5,795
			Secured Debt	(9)	12/22/2023		11.47%	SF+	7.00%		12/22/2028	42,075	41,245	42,075
													46,918	47,870
VORTEQ Coil Finishers, LLC	(10)	Specialty Coating of Aluminum and Light-Gauge Steel
			Common Equity	(8)	11/30/2021	1,038,462							1,038	2,640

Wall Street Prep, Inc.	(10)	Financial Training Services
			Secured Debt	(9) (25)	7/19/2021			SF+	7.00%		7/19/2026	—	(2)	(2)
			Secured Debt	(9)	7/19/2021		11.74%	SF+	7.00%		7/19/2026	1,759	1,748	1,759
			Common Stock		7/19/2021	400,000							400	1,210

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)		Business Description	Type of Investment (2) (3) (15)		Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)		PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)		Fair Value (18)

													2,146		2,967
Watterson Brands, LLC	(10)	Facility Management Services
			Secured Debt		12/17/2021		12.00%			4.00%	12/17/2026	2,270	2,251		2,142
			Secured Debt		12/17/2021		12.00%			4.00%	12/17/2026	392	377		369
			Secured Debt		12/17/2021		12.00%			4.00%	12/17/2026	16,135	16,036		15,227
			Secured Debt		12/17/2021		12.00%			4.00%	12/17/2026	12,906	12,826		12,180
													31,490		29,918
West Star Aviation Acquisition, LLC	(10)	Aircraft, Aircraft Engine and Engine Parts
			Secured Debt	(9) (26)	3/1/2022		9.47%	SF+	5.00%		3/1/2028	2,381	2,348		2,381
			Secured Debt	(9)	3/1/2022		9.60%	SF+	5.00%		3/1/2028	10,550	10,428		10,550
			Secured Debt	(9)	11/3/2023		9.60%	SF+	5.00%		3/1/2028	5,250	5,166		5,250
			Common Stock	(8)	3/1/2022	1,541,400							1,541		4,920
													19,483		23,101
Winter Services LLC	(10)	Provider of Snow Removal and Ice Management Services
			Secured Debt	(9) (32)	11/19/2021		12.81%	SF+	8.00%		11/19/2026	2,200	2,161		2,138
			Secured Debt	(9)	11/19/2021		12.85%	SF+	8.00%		11/19/2026	1,874	1,856		1,821
			Secured Debt	(9)	1/16/2024		11.85%	SF+	7.00%		11/19/2026	7,240	7,131		7,035
			Secured Debt	(9)	1/16/2024		13.85%	SF+	9.00%		11/19/2026	7,240	7,131		7,035
													18,279		18,029
Xenon Arc, Inc.	(10)	Tech-enabled Distribution Services to Chemicals and Food Ingredients Primary Producers
			Secured Debt	(9)	12/17/2021		9.70%	SF+	5.25%		12/20/2028	23,814	23,549		23,814
			Secured Debt	(9)	12/17/2021		9.98%	SF+	5.25%		12/20/2028	37,442	37,063		37,442
													60,612		61,256
YS Garments, LLC	(11)	Designer and Provider of Branded Activewear
			Secured Debt	(9) (26)	8/22/2018		12.25%	SF+	7.50%		8/9/2026	10,892	10,739		9,949

Zips Car Wash, LLC	(10)	Express Car Wash Operator
			Secured Debt	(9)	2/11/2022		11.91%	SF+	7.25%	11.91%	12/31/2024	18,023	18,023		14,852
			Secured Debt	(9)	2/11/2022		11.91%	SF+	7.25%	11.91%	12/31/2024	4,518	4,518		3,723
													22,541		18,575
ZRG Partners, LLC	(10)	Talent Advisory Services Provider
			Secured Debt	(9)	6/14/2024		12.50%	P+	5.00%		6/14/2029	695	509		695
			Secured Debt	(9)	6/14/2024		10.74%	SF+	6.00%		6/14/2029	4,158	3,956		4,158
			Secured Debt	(9)	6/14/2024		10.28%	SF+	6.00%		6/14/2029	6,568	6,447		6,568
			Secured Debt	(9)	6/14/2024		10.66%	SF+	6.00%		6/14/2029	47,050	46,185		47,050
													57,097		58,471
Subtotal Non-Control/Non-Affiliate investments (71.4% of net assets at fair value)													$	2,077,901	$	1,997,981

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)


Portfolio Company (1) (20)	Business Description	Type of Investment (2) (3) (15)	Investment Date (24)	Shares/Units	Total Rate	Reference Rate and Spread (28)	PIK Rate (19)	Maturity Date	Principal (4)	Cost (4)		Fair Value (18)

Total Portfolio Company investments, December 31, 2024 (176.3% of net assets at fair value)										$	4,237,312	$	4,932,669

Money market funds (included in cash and cash equivalents)
Dreyfus Government Cash Management (36)										$	3,400	$	3,400
Fidelity Government Fund (32)										1,526		1,526
Fidelity Treasury (31)										1,548		1,548
Total money market funds										$	6,474	$	6,474

___________________________

(1)All investments are LMM portfolio investments, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of LMM portfolio investments. All of the Company’s investments, unless otherwise noted, are encumbered either as security for the Corporate Facility or SPV Facility or in support of the debentures guaranteed by the SBA and issued by the Funds.

(3)See Note C — Fair Value Hierarchy for Investments — Portfolio Composition and Schedule 12-14 for a summary of geographic location of portfolio companies.

(7)“Non-Control/Non-Affiliate” investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.

(8)Income producing through dividends or distributions.

(9)Index based floating interest rate is subject to contractual minimum interest rate. As noted in this schedule, 95% of the loans (based on the par amount) contain Term SOFR floors which range between 0.50% and 5.25%, with a weighted-average floor of 1.32%.

(10)Private Loan portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Private Loan portfolio investments.

(11)Middle Market portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Middle Market portfolio investments.

(12)Other Portfolio investment. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for a description of Other Portfolio investments.

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)

(14)Non-accrual and non-income producing debt investment.

(15)All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities.”

(16)External Investment Manager. Investment is not encumbered as security for the Credit Facilities or in support of the SBA-guaranteed debentures issued by the Funds.

(17)Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.

(18)Investment Fair Value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.

(19)Investments may have a portion, or all, of their income received from PIK interest or dividends. PIK interest income and cumulative dividend income represent income not paid currently in cash. The difference between the Total Rate and PIK Rate represents the cash rate as of December 31, 2024.

(20)All portfolio company headquarters are based in the United States, unless otherwise noted.

(21)Portfolio company headquarters are located outside of the United States.

(22)The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of SOFR+7.00% (Floor 1.50%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.

(23)The Company has entered into an intercreditor agreement that entitles the Company to the “last out” tranche of the first lien secured loans, whereby the “first out” tranche will receive priority as to the “last out” tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of 11.75% per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.

(24)Investment Date represents the date of initial investment in the security position.

(25)The position is unfunded and no interest income is being earned as of December 31, 2024. The position may earn a nominal unused facility fee on committed amounts.

(26)Each new draw or funding on the facility has a different floating rate reset date. The rate presented represents a weighted-average rate for borrowings under the facility, as of December 31, 2024.

(27)Warrants are presented in equivalent shares/units with a strike price of $0.01 per share/unit.

(28)A majority of the variable rate loans in the Investment Portfolio bear interest at a rate that may be determined by reference to either SOFR (“SF”) or an alternate base rate (commonly based on the federal funds rate or the prime rate (“P”)), which typically resets every one, three, or six months at the borrower’s option. SOFR based contracts may include a credit spread adjustment (the “Adjustment”) that is charged in addition to the stated spread. The Adjustment is applied when the SOFR, plus the Adjustment, exceeds the stated floor rate, as applicable. As of December 31, 2024, SOFR based contracts in the portfolio had Adjustments ranging from 0.10% to 0.26%.

(29)Shares/Units represent ownership in a related real estate or holding entity.

(30)Investment is not unitized. Presentation is made in percent of fully diluted ownership unless otherwise indicated.

(31)Effective yield as of December 31, 2024 was approximately 4.10% on the Fidelity Treasury.

(33)Index based floating interest rate is subject to contractual maximum base rate of 3.00%.

Table of contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2024

(dollars in thousands)

(34)Index based floating interest rate is subject to contractual maximum base rate of 1.50%.

(35)Warrants are presented in equivalent shares/units with a strike price of $1.00 per share/unit.

(36)Effective yield as of December 31, 2024 was approximately 4.43% on the Dreyfus Government Cash Management.

(37)Effective yield as of December 31, 2024 was approximately 4.14% on the Fidelity Government Fund.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements

(Unaudited)

NOTE A — ORGANIZATION AND BASIS OF PRESENTATION

1.Organization

Main Street Capital Corporation (“MSCC” or, together with its consolidated subsidiaries, “Main Street” or the “Company”) is a principal investment firm primarily focused on providing customized long-term debt and equity capital solutions to lower middle market (“LMM”) companies (its “LMM investment strategy”) and debt capital to private (“Private Loan”) companies owned by or in the process of being acquired by a private equity fund (its “Private Loan investment strategy”). Main Street’s portfolio investments are typically made to support management buyouts, recapitalizations, growth financings, refinancings and acquisitions of companies that operate in diverse industry sectors. Main Street seeks to partner with entrepreneurs, business owners and management teams and generally provides “one-stop” debt and equity financing solutions within its LMM investment strategy. Main Street invests primarily in secured debt investments, equity investments, warrants and other securities of LMM companies typically based in the United States. Main Street also seeks to partner with private equity fund sponsors in its Private Loan investment strategy and primarily invests in secured debt investments of Private Loan companies generally headquartered in the United States.

Main Street also maintains a legacy portfolio of investments in larger middle market (“Middle Market”) companies (its “Middle Market investment portfolio”) and a limited portfolio of other portfolio (“Other Portfolio”) investments. Main Street’s Middle Market investments are generally debt investments in companies owned by a private equity fund that were originally issued through a syndication financing process. Main Street has generally stopped making new Middle Market investments and expects the size of its Middle Market investment portfolio to continue to decline in future periods as its existing Middle Market investments are repaid or sold. Main Street’s Other Portfolio investments primarily consist of investments that are not consistent with the typical profiles for its LMM, Private Loan or Middle Market portfolio investments, including investments in unaffiliated investment companies and private funds managed by third parties.

The “Investment Portfolio,” as used herein, refers to all of Main Street’s investments in LMM portfolio companies, investments in Private Loan portfolio companies, investments in Middle Market portfolio companies, Other Portfolio investments, short-term portfolio investments (as discussed in Note C — Fair Value Hierarchy for Investments — Portfolio Composition — Investment Portfolio Composition) and the investment in the External Investment Manager (as defined below).

MSCC was formed in March 2007 to operate as an internally managed business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “1940 Act”). Because MSCC is internally managed, all of the executive officers and other employees are employed by MSCC. Therefore, MSCC does not pay any external investment advisory fees, but instead directly incurs the operating costs associated with employing investment and portfolio management professionals.

MSCC wholly owns several investment funds, including Main Street Mezzanine Fund, LP (“MSMF”) and Main Street Capital III, LP (“MSC III” and, together with MSMF, the “Funds”), and each of their general partners. The Funds are each licensed as a Small Business Investment Company (“SBIC”) by the United States Small Business Administration (“SBA”).

MSC Adviser I, LLC (the “External Investment Manager”) was formed in November 2013 as a wholly-owned subsidiary of Main Street to provide investment management and other services to parties other than Main Street (“External Parties”) and earns fee income for such services. MSCC has been granted no-action relief by the Securities and Exchange Commission (“SEC”) to allow the External Investment Manager to register as a registered investment adviser under the Investment Advisers Act of 1940, as amended. Since the External Investment Manager conducts all of its investment management activities for External Parties, it is accounted for as a portfolio investment of Main Street and is not included as a consolidated subsidiary in Main Street’s consolidated financial statements.

MSCC has elected to be treated for U.S. federal income tax purposes as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). As a result, MSCC generally does not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that it distributes to its stockholders.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

MSCC has certain direct and indirect wholly-owned subsidiaries that have elected to be taxable entities (the “Taxable Subsidiaries”). The primary purpose of the Taxable Subsidiaries is to permit MSCC to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes. MSCC also has certain direct and indirect wholly-owned subsidiaries formed for financing purposes (the “Structured Subsidiaries”).

Unless otherwise noted or the context otherwise indicates, the terms the “Company” and “Main Street” refer to MSCC and its consolidated subsidiaries, which include the Funds, the Taxable Subsidiaries and the Structured Subsidiaries.

2.Basis of Presentation

Main Street’s consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The Company is an investment company following accounting and reporting guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 946, Financial Services—Investment Companies (“ASC 946”). For each of the periods presented herein, Main Street’s consolidated financial statements include the accounts of MSCC and its consolidated subsidiaries. Main Street’s results of operations for the three and six months ended June 30, 2025 and 2024, cash flows for the six months ended June 30, 2025 and 2024 and financial position as of June 30, 2025 and December 31, 2024 are presented on a consolidated basis. The effects of all intercompany transactions between MSCC and its consolidated subsidiaries have been eliminated in consolidation.

The accompanying unaudited consolidated financial statements of Main Street are presented in conformity with U.S. GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Articles 6, 10 and 12 of Regulation S-X. Accordingly, certain disclosures accompanying annual consolidated financial statements prepared in accordance with U.S. GAAP are omitted. The unaudited consolidated financial statements and notes should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2024. In the opinion of management, the unaudited consolidated financial results included herein contain all adjustments, consisting solely of normal recurring accruals, considered necessary for the fair presentation of financial statements for the interim periods included herein. The results of operations for the three and six months ended June 30, 2025 are not necessarily indicative of the operating results to be expected for the full year. Financial statements prepared on a U.S. GAAP basis require management to make estimates and assumptions that affect the amounts and disclosures reported in the consolidated financial statements and accompanying notes. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein.

Principles of Consolidation

Under ASC 946, Main Street is precluded from consolidating other entities in which Main Street has equity investments, including those in which it has a controlling interest, unless the other entity is another investment company. An exception to this general principle in ASC 946 occurs if Main Street holds a controlling interest in an operating company that provides all or substantially all of its services directly to Main Street. Accordingly, as noted above, Main Street’s consolidated financial statements include the financial position and operating results for the Funds, the Taxable Subsidiaries and the Structured Subsidiaries. Main Street has determined that none of its portfolio investments qualify for this exception, including the investment in the External Investment Manager. Therefore, Main Street’s Investment Portfolio is carried on the Consolidated Balance Sheets at fair value, as discussed further in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio, with any adjustments to fair value recognized as “Net Unrealized Appreciation (Depreciation)” until the investment is realized, usually upon exit, resulting in any gain or loss being recognized as a “Net Realized Gain (Loss),” in both cases on the Consolidated Statements of Operations.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Portfolio Investment Classification

Main Street classifies its Investment Portfolio in accordance with the requirements of the 1940 Act. Under the 1940 Act, (a) “Control” investments are defined as investments in which Main Street owns more than 25% of the voting securities or has rights to maintain greater than 50% of the board representation, (b) “Affiliate” investments are defined as investments in which Main Street owns between 5% and 25% (inclusive) of the voting securities and does not have rights to maintain greater than 50% of the board representation and (c) “Non-Control/Non-Affiliate” investments are defined as investments that are neither Control investments nor Affiliate investments. For purposes of determining the classification of its Investment Portfolio, Main Street has excluded consideration of any voting securities or board appointment rights held by third-party investment funds advised by the External Investment Manager.

3.Revisions to the Presentation of Previously Issued Financial Statements

As of June 30, 2025, Main Street changed its tax presentation on the Consolidated Statement of Operations to voluntarily correct an immaterial error in order to comply with the applicable presentation requirements in 210.6-07 of Regulation S-X. Net investment income now includes excise tax expense and net investment income related federal and state income and other tax expenses. These revisions had no impact on net increase in net assets resulting from operations or net increase in net assets resulting from operations per share. All prior period net investment income and net investment income per share amounts presented in these consolidated financial statements and the notes thereto have been retrospectively adjusted to conform to the current presentation. The impact of the adjustments on the Consolidated Statement of Operations for each of the three months ended March 31, 2024, June 30, 2024 and March 31, 2025 are as follows:


	Three Months Ended March 31, 2024
	As Previously Reported		Adjustments		As Revised
	(in thousands, except per share amounts)
Net investment income before taxes	$	89,807	$	—	$	89,807
Excise tax expense	—		(922)		(922)
Federal and state income and other tax expenses	—		(2,453)		(2,453)
Net investment income	89,807		(3,375)		86,432
Net investment income per share	$	1.05	$	(0.03)	$	1.02

Income tax benefit (provision) on net realized gain (loss) and net unrealized appreciation (depreciation)	$	—	$	(7,565)	$	(7,565)
Total income tax (provision) benefit	$	(10,940)	$	10,940	$	—


	Three Months Ended June 30, 2024
	As Previously Reported		Adjustments		As Revised
	(in thousands, except per share amounts)
Net investment income before taxes	$	87,300	$	—	$	87,300
Excise tax expense	—		(272)		(272)
Federal and state income and other tax expenses	—		(3,129)		(3,129)
Net investment income	87,300		(3,401)		83,899
Net investment income per share	$	1.01	$	(0.04)	$	0.97

Income tax benefit (provision) on net realized gain (loss) and net unrealized appreciation (depreciation)	$	—	$	(7,669)	$	(7,669)
Total income tax (provision) benefit	$	(11,070)	$	11,070	$	—

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)


	Three Months Ended March 31, 2025
	As Previously Reported		Adjustments		As Revised
	(in thousands, except per share amounts)
Net investment income before taxes	$	89,810	$	—	$	89,810
Excise tax expense	—		(1,341)		(1,341)
Federal and state income and other tax expenses	—		(2,572)		(2,572)
Net investment income	89,810		(3,913)		85,897
Net investment income per share	$	1.01	$	(0.04)	$	0.97

Income tax benefit (provision) on net realized gain (loss) and net unrealized appreciation (depreciation)	$	—	$	(3,460)	$	(3,460)
Total income tax (provision) benefit	$	(7,373)	$	7,373	$	—

The adjustments also impacted the ratio of net investment income to average NAV as presented in Note F — Financial Highlights.

NOTE B — SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

1.Valuation of the Investment Portfolio

Main Street accounts for its Investment Portfolio at fair value. As a result, Main Street follows the provisions of ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value and enhances disclosure requirements for fair value measurements. ASC 820 requires Main Street to assume that the portfolio investment is to be sold in the principal market to independent market participants, which may be a hypothetical market. Market participants are defined as buyers and sellers in the principal market that are independent, knowledgeable and willing and able to transact.

Main Street’s portfolio strategy calls for it to invest primarily in illiquid debt and equity securities issued by LMM companies and debt securities issued by Private Loan companies. Main Street also maintains a legacy portfolio of investments in Middle Market companies and a limited portfolio of Other Portfolio investments. Main Street’s portfolio may also periodically include short-term portfolio investments that are atypical of Main Street’s LMM and Private Loan portfolio investments as they are intended to be a short-term deployment of capital and are more liquid than investments within the LMM and Private Loan investment portfolios. Main Street’s portfolio investments may be subject to restrictions on resale.

LMM investments and Other Portfolio investments generally have no established trading market, while Private Loan investments may include investments which have no established market or have established markets that are not active. Middle Market and short-term portfolio investments generally have established markets that are not active. Main Street determines in good faith the fair value of its Investment Portfolio pursuant to a valuation policy in accordance with ASC 820, with such valuation process approved by its Board of Directors and in accordance with the 1940 Act. Main Street’s valuation policies and processes are intended to provide a consistent basis for determining the fair value of Main Street’s Investment Portfolio.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

For LMM portfolio investments, Main Street generally reviews external events, including private mergers, sales and acquisitions involving comparable companies, and includes these events in the valuation process by using an enterprise value waterfall methodology (“Waterfall”) for its LMM equity investments and an income approach using a yield-to-maturity model (“Yield-to-Maturity”) valuation method for its LMM debt investments. For Private Loan and Middle Market portfolio investments in debt securities for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value the investment in a current hypothetical sale using the Yield-to-Maturity valuation method. For Middle Market and short-term portfolio investments in debt securities for which it has determined that third-party quotes or other independent prices are available, Main Street primarily uses quoted prices in the valuation process. Main Street determines the appropriateness of the use of third-party broker quotes, if any, in determining fair value based on its understanding of the level of actual transactions used by the broker to develop the quote and whether the quote was an indicative price or binding offer, the depth and consistency of broker quotes and the correlation of changes in broker quotes with underlying performance of the portfolio company and other market indices. For its Other Portfolio equity investments, Main Street generally calculates the fair value of the investment primarily based on the net asset value (“NAV”) of the fund and adjusts the fair value for other factors deemed relevant that would affect the fair value of the investment. All of the valuation approaches for Main Street’s portfolio investments estimate the value of the investment as if Main Street were to sell, or exit, the investment as of the measurement date.

These valuation approaches consider the value associated with Main Street’s ability to control the capital structure of the portfolio company, as well as the timing of a potential exit. For valuation purposes, “control” portfolio investments are composed of debt and equity securities in companies for which Main Street has a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. For valuation purposes, “non-control” portfolio investments are generally composed of debt and equity securities in companies for which Main Street does not have a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors.

Under the Waterfall valuation method, Main Street estimates the enterprise value of a portfolio company using a combination of market and income approaches or other appropriate valuation methods, such as considering recent transactions in the equity securities of the portfolio company or third-party valuations of the portfolio company, and then performs a Waterfall calculation by allocating the enterprise value over the portfolio company’s securities in order of their preference relative to one another. The enterprise value is the fair value at which an enterprise could be sold in a transaction between two willing parties, other than through a forced or liquidation sale. Typically, privately held companies are bought and sold based on multiples of earnings before interest, taxes, depreciation and amortization (“EBITDA”), cash flows, net income, revenues, or in limited cases, book value. There is no single methodology for estimating enterprise value. For any one portfolio company, enterprise value is generally described as a range of values from which a single estimate of enterprise value is derived. In estimating the enterprise value of a portfolio company, Main Street analyzes various factors including the portfolio company’s historical and projected financial results. Due to SEC deadlines for Main Street’s quarterly and annual financial reporting, the operating results of a portfolio company used in the current period valuation are generally the results from the period ended three months prior to such valuation date and may include unaudited, projected, budgeted or pro forma financial information and may require adjustments for non-recurring items or to normalize the operating results that may require significant judgment in determining. In addition, projecting future financial results requires significant judgment regarding future growth assumptions. In evaluating the operating results, Main Street also analyzes the impact of exposure to litigation, loss of customers or other contingencies. After determining the appropriate enterprise value, Main Street allocates the enterprise value to investments in order of the legal priority of the various components of the portfolio company’s capital structure. In applying the Waterfall valuation method, Main Street assumes the loans are paid-off at the principal amount in a change in control transaction and are not assumed by the buyer, which Main Street believes is consistent with its past transaction history and standard industry practices.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Under the Yield-to-Maturity valuation method, Main Street also uses the income approach to determine the fair value of debt securities based on projections of the discounted future free cash flows that the debt security will likely generate, including analyzing the discounted cash flows of interest and principal amounts for the debt security, as set forth in the associated loan agreements, as well as the financial position and credit risk of the portfolio company. Main Street’s estimate of the expected repayment date of its debt securities is generally the maturity date of the instrument, as Main Street generally intends to hold its loans and debt securities to maturity. The Yield-to-Maturity analysis also considers changes in leverage levels, credit quality, portfolio company performance, changes in market-based interest rates and other factors. Main Street will generally use the value determined by the Yield-to-Maturity analysis as the fair value for that security; however, because of Main Street’s general intent to hold its loans to maturity, the fair value will not exceed the principal amount of the debt security valued using the Yield-to-Maturity valuation method. A change in the assumptions that Main Street uses to estimate the fair value of its debt securities using the Yield-to-Maturity valuation method could have a material impact on the determination of fair value. If there is deterioration in credit quality or if a debt security is in workout status, Main Street may consider other factors in determining the fair value of the debt security, including the value attributable to the debt security from the enterprise value of the portfolio company or the proceeds that would most likely be received in a liquidation analysis.

Under the NAV valuation method, for an investment in an investment fund that does not have a readily determinable fair value, Main Street measures the fair value of the investment predominately based on the NAV of the investment fund as of the measurement date and adjusts the investment’s fair value for factors known to Main Street that would affect that fund’s NAV, including, but not limited to, fair values for individual investments held by the fund if Main Street holds the same investment or for a publicly traded investment. In addition, in determining the fair value of the investment, Main Street considers whether adjustments to the NAV are necessary in certain circumstances, based on the analysis of any restrictions on redemption of Main Street’s investment as of the measurement date, recent actual sales or redemptions of interests in the investment fund, and expected future cash flows available to equity holders, including the rate of return on those cash flows compared to an implied market return on equity required by market participants, or other uncertainties surrounding Main Street’s ability to realize the full NAV of its interests in the investment fund.

Pursuant to its internal valuation process and the requirements under the 1940 Act, Main Street performs valuation procedures on each of its portfolio investments quarterly. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its LMM portfolio companies, Main Street, among other things, consults with a nationally recognized independent financial advisory services firm (the “Financial Advisory Firm”). The Financial Advisory Firm analyzes and provides observations, recommendations and an assurance certification regarding Main Street’s determinations of the fair value of its LMM portfolio company investments. The Financial Advisory Firm is generally consulted relative to Main Street’s investments in each LMM portfolio company at least once every calendar year, and for Main Street’s investments in new LMM portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the Financial Advisory Firm on its investments in one or more LMM portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a LMM portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value for its investments in a total of 19 and 18 LMM portfolio companies during the three months ended June 30, 2025 and 2024, respectively, representing 23% and 21% of the total LMM portfolio at fair value as of June 30, 2025 and 2024, respectively. A total of 68 LMM portfolio companies were reviewed and certified by the Financial Advisory Firm during the trailing twelve months ended June 30, 2025, representing 92% of the total LMM portfolio at fair value as of June 30, 2025. Excluding its investments in LMM portfolio companies that, as of June 30, 2025, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment or whose primary purpose is to own real estate for which a third-party appraisal is obtained on at least an annual basis, 99% of the LMM portfolio at fair value was reviewed and certified by the Financial Advisory Firm during the trailing twelve months ended June 30, 2025.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

For valuation purposes, all of Main Street’s Private Loan portfolio investments are non-control investments. For Private Loan portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Private Loan debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Private Loan equity investments in a current hypothetical sale using the Waterfall valuation method.

In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its Private Loan portfolio companies, Main Street, among other things, consults with the Financial Advisory Firm. The Financial Advisory Firm analyzes and provides observations and recommendations and an assurance certification regarding Main Street’s determinations of the fair value of its Private Loan portfolio company investments. The Financial Advisory Firm is generally consulted relative to Main Street’s investments in each Private Loan portfolio company at least once every calendar year, and for Main Street’s investments in new Private Loan portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the Financial Advisory Firm on its investments in one or more Private Loan portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a Private Loan portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value for its investments in a total of 19 Private Loan portfolio companies during each of the three months ended June 30, 2025 and 2024, representing 26% and 22% of the total Private Loan portfolio at fair value as of June 30, 2025 and 2024, respectively. A total of 64 Private Loan portfolio companies were reviewed and certified by the Financial Advisory Firm during the trailing twelve months ended June 30, 2025, representing 91% of the total Private Loan portfolio at fair value as of June 30, 2025. Excluding its investments in Private Loan portfolio companies that, as of June 30, 2025, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment, 98% of the Private Loan portfolio at fair value was reviewed and certified by the Financial Advisory Firm during the trailing twelve months ended June 30, 2025.

For valuation purposes, all of Main Street’s Middle Market portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. For Middle Market portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Middle Market debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Middle Market equity investments in a current hypothetical sale using the Waterfall valuation method. Main Street generally consults on a limited basis with the Financial Advisory Firm in connection with determining the fair value of its Middle Market portfolio investments due to the nature of these investments. The vast majority (96% and 97% as of June 30, 2025 and December 31, 2024, respectively) of the Middle Market portfolio investments (i) are valued using third-party quotes or other independent pricing services or (ii) Main Street has consulted with and received an assurance certification from the Financial Advisory Firm within the last twelve months.

For valuation purposes, Main Street’s short-term portfolio investments have historically been comprised of non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. Because any short-term portfolio investments are typically valued using third-party quotes or other independent pricing services, Main Street generally does not consult with any financial advisory services firms in connection with determining the fair value of its short-term portfolio investments.

For valuation purposes, all of Main Street’s Other Portfolio investments are non-control investments. Main Street’s Other Portfolio investments comprised 2.4% and 2.5% of Main Street’s Investment Portfolio at fair value as of June 30, 2025 and December 31, 2024, respectively. Similar to the LMM investment portfolio, market quotations for Other Portfolio equity investments are generally not readily available. For its Other Portfolio equity investments, Main Street generally determines the fair value of these investments using the NAV valuation method.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

For valuation purposes, Main Street’s investment in the External Investment Manager is a control investment. Market quotations are not readily available for this investment, and as a result, Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach. In estimating the enterprise value, Main Street analyzes various factors, including the entity’s historical and projected financial results, as well as its size, marketability and performance relative to the population of market comparables, and the valuations for comparable publicly traded companies and private transactions involving comparable companies. This valuation approach estimates the value of the investment as if Main Street were to sell, or exit, the investment. In addition, Main Street considers its ability to control the capital structure of the company, as well as the timing of a potential exit, in connection with determining the fair value of the External Investment Manager. Main Street consults with and receives an assurance certification from the Financial Advisory Firm in arriving at its determination of fair value for its investment in the External Investment Adviser on a quarterly basis, including as of June 30, 2025 and December 31, 2024.

Due to the inherent uncertainty in the valuation process, Main Street’s determination of fair value for its Investment Portfolio may differ materially from the values that would have been determined had a ready market for the securities existed. In addition, changes in the market environment, portfolio company performance and other events that may occur over the lives of the investments may cause the gains or losses ultimately realized on these investments to be materially different than the valuations currently assigned. Main Street determines the fair value of each individual investment and records changes in fair value as unrealized appreciation or depreciation.

Main Street uses an internally developed portfolio investment rating system in connection with its investment oversight, portfolio management and analysis and investment valuation procedures for its LMM, Private Loan and Middle Market portfolio companies. This system takes into account both quantitative and qualitative factors of each LMM, Private Loan and Middle Market portfolio company.

Rule 2a-5 under the 1940 Act permits a BDC’s board of directors to designate its executive officers or investment adviser as a valuation designee to determine the fair value for its investment portfolio, subject to the active oversight of the board. Main Street’s Board of Directors has approved policies and procedures pursuant to Rule 2a-5 (the “Valuation Procedures”) and has designated a group of its executive officers to serve as the Board of Directors’ valuation designee. Main Street believes its Investment Portfolio as of June 30, 2025 and December 31, 2024 approximates fair value as of those dates based on the markets in which it operates and other conditions in existence on those reporting dates.

2.Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the period. Actual results may differ from these estimates under different conditions or assumptions. Additionally, as explained in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio, the consolidated financial statements include investments in the Investment Portfolio whose values have been estimated by Main Street, pursuant to valuation policies and procedures approved and overseen by Main Street’s Board of Directors, in the absence of readily ascertainable market values. Because of the inherent uncertainty of the Investment Portfolio valuations, those estimated values may differ materially from the values that would have been determined had a ready market for the securities existed.

Macroeconomic factors, including pandemics, risk of recession, inflation, supply chain constraints or disruptions, geopolitical disruptions, uncertainty with respect to the imposition of tariffs on and trade disputes with certain countries and changing market index interest rates, and the related effect on the U.S. and global economies, have impacted, and may continue to impact, the businesses and operating results of certain of Main Street’s portfolio companies. As a result of these and other current effects of macroeconomic factors, as well as the uncertainty regarding the extent and duration of their impact, the valuation of Main Street’s Investment Portfolio has and may continue to experience increased volatility.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

3.Cash and Cash Equivalents

Cash and cash equivalents consist of cash and highly liquid investments with an original maturity of three months or less at the date of purchase. Cash and cash equivalents are carried at cost, which approximates fair value. As of June 30, 2025 and December 31, 2024, the Company had $19.0 million and $6.5 million, respectively, of cash equivalents invested in AAA-rated money market funds pending investment in the Company’s primary investment strategies. These highly liquid investments are included in the Consolidated Schedule of Investments.

As of June 30, 2025 and December 31, 2024, cash balances totaling $64.8 million and $67.5 million, respectively, exceeded Federal Deposit Insurance Corporation insurance protection levels, subjecting the Company to risk related to the uninsured balance.

4.Interest, Dividend and Fee Income

Main Street records interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded when dividends are declared by the portfolio company or at such other time that an obligation exists for the portfolio company to make a distribution. Main Street evaluates accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if Main Street otherwise does not expect the debtor to be able to service its debt obligation, Main Street will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt obligation, or if a loan or debt security is sold or written off, Main Street removes it from non-accrual status.

As of June 30, 2025, investments on non-accrual status comprised 2.1% of Main Street’s total Investment Portfolio at fair value and 5.0% at cost. As of December 31, 2024, investments on non-accrual status comprised 0.9% of Main Street’s total Investment Portfolio at fair value and 3.5% at cost.

Main Street holds certain debt and preferred equity instruments in its Investment Portfolio that contain PIK interest and cumulative dividend provisions. The PIK interest, computed at the contractual rate specified in each debt agreement, is periodically added to the principal balance of the debt and is recorded as interest income. Thus, the actual collection of this interest may be deferred until the time of debt principal repayment. Cumulative dividends are recorded as dividend income, and any dividends in arrears are added to the balance of the preferred equity investment. The actual collection of these dividends in arrears may be deferred until such time as the preferred equity is redeemed or sold. To maintain RIC tax treatment (as discussed in Note B.10. — Summary of Significant Accounting Policies — Income Taxes below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though Main Street may not have collected the PIK interest and cumulative dividends in cash. Main Street stops accruing PIK interest and cumulative dividends and writes off any accrued and uncollected interest and dividends in arrears when it determines that such PIK interest and dividends in arrears are no longer collectible. For the three months ended June 30, 2025 and 2024, (i) 2.3% and 3.7%, respectively, of Main Street’s total investment income was attributable to PIK interest income not paid currently in cash and (ii) 0.9% and 0.5%, respectively, of Main Street’s total investment income was attributable to cumulative dividend income not paid currently in cash. For the six months ended June 30, 2025 and 2024, (i) 2.6% and 3.5%, respectively, of Main Street’s total investment income was attributable to PIK interest income not paid currently in cash and (ii) 0.7% and 0.4%, respectively, of Main Street’s total investment income was attributable to cumulative dividend income not paid currently in cash.

Main Street may periodically provide services, including structuring and advisory services, to its portfolio companies or other third parties. For services that are separately identifiable and evidence exists to substantiate fair value, fee income is recognized as earned, which is generally when the investment or other applicable transaction closes. Fees received in connection with debt financing transactions for services that do not meet these criteria are treated as debt origination fees and are generally deferred and accreted into income over the life of the financing.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

A presentation of total investment income Main Street earned from its Investment Portfolio in each of the periods presented is as follows:


	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
	(dollars in thousands)
Interest, fee and dividend income:
Interest income	$	100,857	$	100,031	$	198,874	$	200,136
Dividend income	37,845		26,688		73,871		49,479
Fee income	5,271		5,435		8,274		14,144
Total investment income	$	143,973	$	132,154	$	281,019	$	263,759

5.Deferred Financing Costs

Deferred financing costs include commitment fees and other direct costs related to Main Street’s Credit Facilities (as defined in Note E — Debt) and its unsecured notes, as well as the commitment fees and leverage fees (3.4% of the total commitment and draw amounts, as applicable) on the SBIC debentures. See further discussion of Main Street’s debt in Note E — Debt. Deferred financing costs incurred in connection with the Credit Facilities are capitalized as an asset. Deferred financing costs incurred in connection with all other debt arrangements are reflected as a direct deduction from the principal amount outstanding.

6.Equity Offering Costs

The Company’s offering costs are charged against the proceeds from equity offerings when the proceeds are received.

7.Unearned Income—Debt Origination Fees and Original Issue Discount and Discounts / Premiums to Par Value

Main Street capitalizes debt origination fees received in connection with financings and reflects such fees as unearned income netted against the applicable debt investments. The unearned income from the fees is accreted into income over the life of the financing.

In connection with its portfolio debt investments, Main Street sometimes receives nominal cost warrants or warrants with an exercise price below the fair value of the underlying equity (together, “nominal cost equity”) that are valued as part of the negotiation process with the particular portfolio company. When Main Street receives nominal cost equity, it allocates its cost basis in its investment between its debt security and its nominal cost equity at the time of origination based on amounts negotiated with the particular portfolio company. The allocated amounts are based upon the fair value of the nominal cost equity, which is then used to determine the allocation of cost to the debt security. Any discount recorded on a debt investment resulting from this allocation is reflected as unearned income, which is netted against the applicable debt investment, and accreted into interest income over the life of the debt investment. The actual collection of this interest is deferred until the time of debt principal repayment.

Main Street may also purchase debt securities at a discount or at a premium to the par value of the debt security. In the case of a purchase at a discount, Main Street records the investment at the par value of the debt security net of the discount, and the discount is accreted into interest income over the life of the debt investment. In the case of a purchase at a premium, Main Street records the investment at the par value of the debt security plus the premium, and the premium is amortized as a reduction to interest income over the life of the debt investment.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

To maintain RIC tax treatment (as discussed in Note B.10. — Summary of Significant Accounting Policies — Income Taxes below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though Main Street may not have collected the interest income. For the three months ended June 30, 2025 and 2024, 1.7% and 2.0%, respectively, of Main Street’s total investment income was attributable to interest income from the accretion of discounts associated with debt investments, net of any premium amortization. For the six months ended June 30, 2025 and 2024, 1.7% and 1.9%, respectively, of Main Street’s total investment income was attributable to interest income from the accretion of discounts associated with debt investments, net of any premium amortization.

8.Share-Based Compensation

Main Street accounts for its share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation. Accordingly, for restricted stock awards, Main Street measures the grant date fair value based upon the market price of its common stock on the date of the grant and amortizes the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term.

Main Street recognizes all excess tax benefits and tax deficiencies associated with share-based compensation (including tax benefits of dividends on share-based payment awards) as tax expense or benefit in the income statement and does not delay recognition of a tax benefit until the tax benefit is realized through a reduction to taxes payable. As such, the tax effects of exercised or vested awards are treated as discrete items in the reporting period in which they occur. Additionally, Main Street has elected to account for forfeitures as they occur.

9.Deferred Compensation Plan

The Main Street Capital Corporation Deferred Compensation Plan (the “Deferred Compensation Plan”) allows directors and certain employees to defer receipt of some or all of their cash compensation or directors’ fees in accordance with plan terms. Deferred Compensation Plan participants elect one or more investment options, including phantom Main Street stock units, interests in affiliated funds and various mutual funds, where their deferred amounts are notionally invested, and Main Street invests the deferred amounts through a trust (except for phantom Main Street stock units), pending distribution.

Compensation deferred under the Deferred Compensation Plan is recognized on the same basis as such compensation would have been recognized if not deferred. The appreciation (depreciation) in the fair value of Deferred Compensation Plan assets is reflected in Main Street's Consolidated Statements of Operations as unrealized appreciation (depreciation), with the recognition of a corresponding and offsetting deferred compensation expense or (benefit), respectively. Deferred compensation expense or (benefit) does not result in a net cash impact to Main Street upon settlement. Investments in the trust are recognized on the Consolidated Balance Sheets as an asset of Main Street (other assets) and as a deferred compensation liability (other liabilities).

Phantom Main Street stock units under the Deferred Compensation Plan are not issued shares of Main Street common stock and are not included as outstanding on the Consolidated Statements of Changes in Net Assets until such shares are actually distributed to the participant, but the related phantom stock units are included in weighted-average shares outstanding with the related dollar amount of the deferral included in total expenses in Main Street’s Consolidated Statements of Operations as the deferred fees or compensation represented by such phantom stock units are earned over the service period. Additional phantom stock units from dividends on phantom stock units are included in the Consolidated Statements of Changes in Net Assets as an increase to dividends to stockholders offset by a corresponding increase to additional paid-in capital.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

10.Income Taxes

MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds and Structured Subsidiaries, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to twelve months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) the filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated.

The Taxable Subsidiaries primarily hold certain equity investments for Main Street. The Taxable Subsidiaries permit Main Street to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes and to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The Taxable Subsidiaries are consolidated with Main Street for U.S. GAAP financial reporting purposes, and the portfolio investments held by the Taxable Subsidiaries are included in Main Street’s consolidated financial statements as portfolio investments and recorded at fair value. The Taxable Subsidiaries are not consolidated with MSCC for income tax purposes and may generate income tax expense, or benefit, and tax assets and liabilities, as a result of their ownership of certain portfolio investments. The taxable income, or loss, of the Taxable Subsidiaries may differ from their book income, or loss, due to temporary book and tax timing differences and permanent differences. The Taxable Subsidiaries are each taxed at corporate income tax rates based on their taxable income. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the Taxable Subsidiaries are reflected in Main Street’s consolidated financial statements.

The External Investment Manager is an indirect wholly-owned subsidiary of MSCC owned through a Taxable Subsidiary and is a disregarded entity for tax purposes. The External Investment Manager has entered into a tax sharing agreement with its Taxable Subsidiary owner. Since the External Investment Manager is accounted for as a portfolio investment of MSCC and is not included as a consolidated subsidiary of MSCC in MSCC’s consolidated financial statements, and as a result of the tax sharing agreement with its Taxable Subsidiary owner, for its stand-alone financial reporting purposes the External Investment Manager is treated as if it is taxed at corporate income tax rates based on its taxable income and, as a result of its activities, may generate income tax expense or benefit. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the External Investment Manager are reflected in the External Investment Manager’s separate financial statements.

The Taxable Subsidiaries and the External Investment Manager use the liability method in accounting for income taxes. Deferred tax assets and liabilities are recorded for temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements, using statutory tax rates in effect for the year in which the temporary differences are expected to reverse. A valuation allowance is provided, if necessary, against deferred tax assets when it is more likely than not that some portion or all of the deferred tax asset will not be realized. Main Street’s net assets as included on the Consolidated Balance Sheets and Consolidated Statements of Changes in Net Assets include an adjustment to classification as a result of permanent book-to-tax differences, which include differences in the book and tax treatment of income and expenses.

Taxable income generally differs from net income for financial reporting purposes due to temporary and permanent differences in the recognition of income and expenses. Taxable income generally excludes net unrealized appreciation or depreciation, as investment gains or losses are not included in taxable income until they are realized.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

11.Net Realized Gains or Losses and Net Unrealized Appreciation or Depreciation

Realized gains or losses are measured by the difference between the net proceeds from the sale or redemption of an investment or a financial instrument and the cost basis of the investment or financial instrument, without regard to unrealized appreciation or depreciation previously recognized, and includes investments written-off during the period net of recoveries and realized gains or losses from in-kind redemptions. Net unrealized appreciation or depreciation reflects the net change in the fair value of the Investment Portfolio and financial instruments and the reclassification of any prior period unrealized appreciation or depreciation on exited investments and financial instruments to realized gains or losses.

12.Fair Value of Financial Instruments

Fair value estimates are made at discrete points in time based on relevant information. These estimates may be subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Main Street believes that the carrying amounts of its financial instruments, consisting of cash and cash equivalents, receivables, payables and other liabilities approximate the fair values of such items due to the short-term nature of these instruments.

Main Street’s debt instruments, including all revolving and term debt, are accounted for on a historical cost basis as applicable under U.S. GAAP. As also required under U.S. GAAP, Main Street discloses the estimated fair value of its debt obligations in Note E — Debt. To estimate the fair value of Main Street’s multiple tranches of unsecured debt instruments as disclosed in Note E — Debt, Main Street uses quoted market prices. For the estimated fair value of Main Street’s SBIC debentures, Main Street uses the Yield-to-Maturity valuation method based on projections of the discounted future free cash flows that the debt security will likely generate, including both the discounted cash flows of the associated interest and principal amounts for the debt security. The inputs used to value Main Street’s debt instruments for purposes of the fair value estimate disclosures in Note E — Debt are considered to be Level 2 according to the ASC 820 fair value hierarchy.

13.Earnings Per Share

Basic and diluted per share calculations, including net increase in net assets resulting from operations per share and net investment income per share, are computed utilizing the weighted-average number of shares of common stock outstanding for the period. In accordance with ASC 260, Earnings Per Share, the unvested shares of restricted stock awarded pursuant to Main Street’s equity compensation plans are participating securities and, therefore, are included in the basic earnings per share calculation. As a result, for all periods presented, there is no difference between diluted earnings per share and basic earnings per share amounts.

14.Segments

Main Street operates as a single segment with a principal investment objective to maximize total return from generating current income from debt investments and current income and capital appreciation from equity and equity-related investments. The Company’s Investment Committee and Chief Executive Officer collectively perform the function that allocates resources and assesses performance, and thus together, serve as the Company’s chief operating decision maker (the “CODM”). Among other metrics, the CODM uses net investment income as a primary U.S. GAAP profit or loss metric used in making operating decisions, which can be found on the Consolidated Statement of Operations along with significant expenses. The measure of segment assets is reported on the Consolidated Balance Sheets as total assets.

15.Recently Issued or Adopted Accounting Standards

In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures. The amendments in this update require more disaggregated information on income taxes paid. ASU 2023-09 is effective for years beginning after December 15, 2024, and early adoption is permitted. The Company has determined that ASU 2023-09 will not have a material impact on the consolidated financial statements and the notes thereto.

From time to time, new accounting pronouncements are issued by the FASB or other standards-setting bodies that are adopted by the Company as of the specified effective date. The Company believes that the impact of recently issued standards and any that are not yet effective will not have a material impact on its consolidated financial statements upon adoption.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

NOTE C — FAIR VALUE HIERARCHY FOR INVESTMENTS — PORTFOLIO COMPOSITION

ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value, and enhances disclosure requirements for fair value measurements. Main Street accounts for its investments at fair value.

Fair Value Hierarchy

In accordance with ASC 820, Main Street has categorized its investments based on the priority of the inputs to the valuation technique into a three-level fair value hierarchy. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical investments (Level 1) and the lowest priority to unobservable inputs (Level 3).

Investments recorded on Main Street’s Consolidated Balance Sheets are categorized based on the inputs to the valuation techniques as follows:

Level 1—Investments whose values are based on unadjusted quoted prices for identical assets in an active market that Main Street has the ability to access (examples include investments in active exchange-traded equity securities and investments in most U.S. government and agency securities).

Level 2—Investments whose values are based on quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the investment. Level 2 inputs include the following:

•Quoted prices for similar assets in active markets (for example, investments in restricted stock);

•Quoted prices for identical or similar assets in non-active markets (for example, investments in thinly traded public companies);

•Pricing models whose inputs are observable for substantially the full term of the investment (for example, market interest rate indices); and

•Pricing models whose inputs are derived principally from, or corroborated by, observable market data through correlation or other means for substantially the full term of the investment.

Level 3—Investments whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement (for example, investments in illiquid securities issued by privately held companies). These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the investment.

As required by ASC 820, when the inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety. For example, a Level 3 fair value measurement may include inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Therefore, unrealized appreciation and depreciation related to such investments categorized within the Level 3 tables below may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3).

As of June 30, 2025 and December 31, 2024, all of Main Street’s LMM portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s LMM portfolio investments were categorized as Level 3 as of June 30, 2025 and December 31, 2024.

As of June 30, 2025 and December 31, 2024, Main Street’s Private Loan portfolio investments primarily consisted of investments in secured debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Private Loan portfolio investments were categorized as Level 3 as of June 30, 2025 and December 31, 2024.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

As of June 30, 2025 and December 31, 2024, Main Street’s Middle Market portfolio investments consisted primarily of investments in secured and unsecured debt investments and independently rated debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Middle Market portfolio investments were categorized as Level 3 as of June 30, 2025 and December 31, 2024.

As of June 30, 2025 and December 31, 2024, Main Street’s Other Portfolio investments consisted primarily of illiquid securities issued by privately held entities and the fair value determination for these investments primarily consisted of unobservable inputs. Main Street also has an equity investment in MSC Income Fund, Inc. (“MSC Income”), which began trading on the New York Stock Exchange (“NYSE”) on January 29, 2025. As a result, beginning on March 31, 2025, Main Street adjusted the basis in its valuation approach to align with the quoted price of MSC Income shares on the NYSE. Therefore, as of June 30, 2025, the equity investment in MSC Income was categorized as a Level 1 investment. The remainder of Main Street’s Other Portfolio investments were categorized as Level 3 as of June 30, 2025 and December 31, 2024.

As of June 30, 2025 and December 31, 2024, Main Street did not hold any short-term portfolio investments.

As of June 30, 2025 and December 31, 2024, all money market funds included in cash and cash equivalents were valued using Level 1 inputs.

The fair value determination of each portfolio investment categorized as Level 3 required one or more of the following unobservable inputs:

•Financial information obtained from each portfolio company, including unaudited statements of operations and balance sheets for the most recent period available as compared to budgeted numbers;

•Current and projected financial condition of the portfolio company;

•Current and projected ability of the portfolio company to service its debt obligations;

•Type and amount of collateral, if any, underlying the investment;

•Current financial ratios (e.g., fixed charge coverage ratio, interest coverage ratio and net debt/EBITDA ratio) applicable to the investment;

•Current liquidity of the investment and related financial ratios (e.g., current ratio and quick ratio);

•Pending debt or capital restructuring of the portfolio company;

•Projected operating results of the portfolio company;

•Current information regarding any offers to purchase the investment;

•Current ability of the portfolio company to raise any additional financing as needed;

•Changes in the economic environment which may have a material impact on the operating results of the portfolio company;

•Internal occurrences that may have an impact (both positive and negative) on the operating performance of the portfolio company;

•Qualitative assessment of key management;

•Contractual rights, obligations or restrictions associated with the investment; and

•Other factors deemed relevant.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

The use of significant unobservable inputs creates uncertainty in the measurement of fair value as of the reporting date. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM equity securities, which are generally valued through an average of the discounted cash flow technique and the market comparable/enterprise value technique (unless one of these approaches is determined to not be appropriate), are (i) EBITDA multiples and (ii) the weighted-average cost of capital (“WACC”). Significant increases (decreases) in EBITDA multiple inputs in isolation would result in a significantly higher (lower) fair value measurement, and significant increases (decreases) in WACC inputs in isolation would result in a significantly lower (higher) fair value measurement. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM, Private Loan and Middle Market debt securities are (i) risk adjusted discount rates used in the Yield-to-Maturity valuation technique (see Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio) and (ii) the percentage of expected principal recovery. Significant increases (decreases) in any of these discount rates in isolation would result in a significantly lower (higher) fair value measurement. Significant increases (decreases) in any of these expected principal recovery percentages in isolation would result in a significantly higher (lower) fair value measurement. However, due to the nature of certain investments, fair value measurements may be based on other criteria, such as third-party appraisals of collateral and fair values as determined by independent third parties, which are not presented in the tables below.

The following tables provide a summary of the significant unobservable inputs used to fair value Main Street’s Level 3 portfolio investments as of June 30, 2025 and December 31, 2024:


Type of Investment	Fair Value as of June 30, 2025 (in thousands)		Valuation Technique	Significant Unobservable Inputs	Range (4)	Weighted-Average (4)(5)		Median (4)
Equity investments	$	1,744,101	Discounted cash flow	WACC	9.7% - 22.7%	14.5	%	15.1	%
			Market comparable / Enterprise value	EBITDA multiple (1) (3)	5.0x - 9.0x (2)	7.2x		6.5x
Debt investments	$	3,301,875	Discounted cash flow	Risk adjusted discount rate (6)	8.3% - 18.6% (2)	12.3	%	12.1	%
				Expected principal recovery percentage	0.0% - 500.0%	98.8	%	100.0	%
Debt investments	$	25,537	Market approach	Third-party quote	14.5 - 99.7	81.2		55.0
Total Level 3 investments	$	5,071,513

___________________________

(1)EBITDA may include proforma adjustments and/or other add-backs based on specific circumstances related to each investment.

(2)Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.0x - 16.0x and the range for risk adjusted discount rate is 5.0% - 36.0%.

(3)The fair value of the equity investment in the External Investment Manager is based on a fee multiple of 8.7x. The fair value determination is based on a discounted, blended multiple based on the multiples for similar businesses in active markets and actual multiples used in private transactions.

(4)Does not include investments for which the valuation technique does not include the use of the applicable fair value input.

(5)Weighted-average is calculated for each significant unobservable input based on the applicable security’s fair value.

(6)Discount rate includes the effect of the standard SOFR base rate, as applicable.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)


Type of Investment	Fair Value as of December 31, 2024 (in thousands)		Valuation Technique	Significant Unobservable Inputs	Range (4)	Weighted-Average (4)(5)		Median (4)
Equity investments	$	1,654,304	Discounted cash flow	WACC	9.4% - 22.5%	14.5	%	15.1	%
			Market comparable / Enterprise value	EBITDA multiple (1) (3)	4.8x - 8.9x (2)	7.0x		6.5x
Debt investments	$	3,174,745	Discounted cash flow	Risk adjusted discount rate (6)	8.5% - 19.1% (2)	12.6	%	12.2	%
				Expected principal recovery percentage	0.0% - 100.0%	99.5	%	100.0	%
Debt investments	$	103,620	Market approach	Third-party quote	21.0 - 100.7	90.5		84.5
Total Level 3 investments	$	4,932,669

___________________________

(1)EBITDA may include proforma adjustments and/or other add-backs based on specific circumstances related to each investment.

(2)Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.0x - 17.0x and the range for risk adjusted discount rate is 5.0% - 38.3%.

(3)The fair value of the equity investment in the External Investment Manager is based on a fee multiple of 8.5x. The fair value determination is based on a discounted, blended multiple based on the multiples for similar businesses in active markets and actual multiples used in private transactions.

(4)Does not include investments for which the valuation technique does not include the use of the applicable fair value input.

(5)Weighted-average is calculated for each significant unobservable input based on the applicable security’s fair value.

(6)Discount rate includes the effect of the standard SOFR base rate, as applicable.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

The following tables provide a summary of changes in fair value of Main Street’s Level 3 portfolio investments for the six months ended June 30, 2025 and 2024 (amounts in thousands):


Type of Investment	Fair Value as of December 31, 2024		Transfers Out of Level 3 Hierarchy		Redemptions/ Repayments		New Investments		Net Changes from Unrealized to Realized		Net Unrealized Appreciation (Depreciation)		Other (1)		Fair Value as of June 30, 2025
Debt	$	3,278,365	$	—	$	(514,216)	$	575,433	$	38,415	$	(19,812)	$	(30,773)	$	3,327,412
Equity	1,637,181		(16,810)		(30,679)		80,309		(65,185)		83,449		30,773		1,719,038
Equity Warrant	17,123		—		—		—		—		7,940		—		25,063
	$	4,932,669	$	(16,810)	$	(544,895)	$	655,742	$	(26,770)	$	71,577	$	—	$	5,071,513

___________________________

(1)Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows.


Type of Investment	Fair Value as of December 31, 2023		Transfers Into Level 3 Hierarchy		Redemptions/ Repayments		New Investments		Net Changes from Unrealized to Realized		Net Unrealized Appreciation (Depreciation)		Other (1)		Fair Value as of June 30, 2024
Debt	$	2,883,917	$	—	$	(406,233)	$	753,750	$	7,468	$	(19,162)	$	18,859	$	3,238,599
Equity	1,395,744		—		(28,445)		65,122		(960)		75,391		(18,859)		1,487,993
Equity Warrant	6,610		—		—		3,920		—		389		—		10,919
	$	4,286,271	$	—	$	(434,678)	$	822,792	$	6,508	$	56,618	$	—	$	4,737,511

___________________________

(1)Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information in the Consolidated Statements of Cash Flows.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

As of June 30, 2025 and December 31, 2024, Main Street’s investments at fair value were categorized as follows in the fair value hierarchy for ASC 820 purposes:


			Fair Value Measurements
			(in thousands)
As of June 30, 2025	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
LMM portfolio investments	$	2,668,844	$	—	$	—	$	2,668,844
Private Loan portfolio investments	1,920,257		—		—		1,920,257
Middle Market portfolio investments	108,705		—		—		108,705
Other Portfolio investments	122,664		21,557		—		101,107
External Investment Manager	272,600		—		—		272,600

Total investments	$	5,093,070	$	21,557	$	—	$	5,071,513


			Fair Value Measurements
			(in thousands)
As of December 31, 2024	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
LMM portfolio investments	$	2,502,872	$	—	$	—	$	2,502,872
Private Loan portfolio investments	1,904,324		—		—		1,904,324
Middle Market portfolio investments	155,329		—		—		155,329
Other Portfolio investments	124,144		—		—		124,144
External Investment Manager	246,000		—		—		246,000

Total investments	$	4,932,669	$	—	$	—	$	4,932,669

Investment Portfolio Composition

Main Street’s principal investment objective is to maximize its portfolio’s total return by generating current income from its debt investments and current income and capital appreciation from its equity and equity-related investments, including warrants, convertible securities and other rights to acquire equity securities in a portfolio company. Main Street seeks to achieve its investment objective primarily through its LMM and Private Loan investment strategies.

Main Street’s LMM investment strategy is focused on investments in secured debt and equity investments in privately held, LMM companies based in the United States. Main Street’s LMM portfolio companies generally have annual revenues between $10 million and $150 million, and its LMM investments generally range in size from $5 million to $125 million. The LMM debt investments are typically secured by a first priority lien on the assets of the portfolio company, can include either fixed or floating interest rates and generally have a term of between five and seven years from the original investment date. Main Street typically makes direct equity investments and/or receives nominally priced equity warrants in connection with a LMM portfolio company debt investment.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Main Street’s Private Loan investment strategy is focused on investments in secured debt in privately held companies that generally have annual revenues between $25 million and $500 million, and its Private Loan investments generally range in size from $10 million to $100 million. Main Street’s Private Loan investments primarily consist of debt securities that have primarily been originated directly by Main Street or, to a lesser extent, through its strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as “club deals” because of the small lender group size. In both cases, Main Street’s Private Loan investments are typically made in a company owned by or in the process of being acquired by a private equity fund. Main Street’s Private Loan portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date. Main Street may also co-invest with the private equity fund in the equity securities of its Private Loan portfolio companies.

Main Street also maintains a legacy portfolio of investments in Middle Market companies. Main Street’s Middle Market investments are generally debt investments in companies owned by a private equity fund that were originally issued through a syndication financing process. Main Street has generally stopped making new Middle Market investments and expects the size of its Middle Market investment portfolio to continue to decline in future periods as its existing Middle Market investments are repaid or sold. Main Street’s Middle Market debt investments generally range in size from $3 million to $25 million, are generally secured by a first priority lien on the assets of the portfolio company and typically have an expected duration of between three and seven years from the original investment date.

Main Street’s Other Portfolio investments primarily consist of investments that are not consistent with the typical profiles for its LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. In the Other Portfolio, Main Street may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds. For Other Portfolio investments, Main Street generally receives distributions related to the assets held by the portfolio company. Those assets are typically expected to be realized over a five to ten-year period.

Based upon Main Street’s liquidity and capital structure management activities, Main Street’s Investment Portfolio may also periodically include short-term portfolio investments that are atypical of Main Street’s LMM, Private Loan and Middle Market portfolio investments in that they are intended to be a short-term deployment of capital. Those assets are typically expected to be realized in one year or less. These short-term portfolio investments are not expected to be a significant portion of the overall Investment Portfolio.

Main Street’s external asset management business is conducted through its External Investment Manager. The External Investment Manager earns management fees based on the assets under management for External Parties and may earn incentive fees, or a carried interest, based on the performance of the assets managed. Main Street entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for its relationship with MSC Income and its other clients. Through this agreement, Main Street shares employees with the External Investment Manager, including their related infrastructure, business relationships, management expertise and capital raising capabilities. Main Street allocates the related expenses to the External Investment Manager pursuant to the sharing agreement. Main Street’s total expenses are net of expenses allocated to the External Investment Manager of $5.9 million for each of the three months ended June 30, 2025 and 2024, and $11.2 million and $11.4 million for the six months ended June 30, 2025 and 2024, respectively.

Investment income, consisting of interest, dividends and fees, can fluctuate dramatically due to various factors, including the level of new investment activity, repayments of debt investments or sales of equity interests. Investment income in any given year could also be highly concentrated among several portfolio companies. For the three and six months ended June 30, 2025 and 2024, Main Street did not record investment income from any single portfolio company in excess of 10% of total investment income.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

The following tables provide a summary of Main Street’s investments in the LMM and Private Loan portfolios as of June 30, 2025 and December 31, 2024 (this information excludes Middle Market, Other Portfolio investments and the External Investment Manager, which are discussed further below).


	As of June 30, 2025
	LMM (a)			Private Loan
	(dollars in millions)
Number of portfolio companies	88			87
Fair value	$	2,668.8		$	1,920.3
Cost	$	2,105.0		$	1,958.0
Debt investments as a % of portfolio (at cost)	70.1		%	94.7		%
Equity investments as a % of portfolio (at cost)	29.9		%	5.3		%
% of debt investments at cost secured by first priority lien	99.3		%	99.9		%
Weighted-average annual effective yield (b)	12.8		%	11.4		%
Average EBITDA (c)	$	10.4		$	32.5

___________________________

(a)As of June 30, 2025, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 38%.

(b)The weighted-average annual effective yields were computed using the effective interest rates for all debt investments as of June 30, 2025, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status, and are weighted based upon the principal amount of each applicable debt investment as of June 30, 2025. The weighted-average annual effective yield on Main Street’s debt portfolio as of June 30, 2025, including debt investments on non-accrual status, was 12.1% for its LMM portfolio and 10.0% for its Private Loan portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor.

(c)The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan portfolio. These calculations exclude certain portfolio companies, including six LMM portfolio companies and six Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate and those portfolio companies whose primary operations have ceased and only residual value remains.


	As of December 31, 2024
	LMM (a)			Private Loan
	(dollars in millions)
Number of portfolio companies	84			91
Fair value	$	2,502.9		$	1,904.3
Cost	$	1,937.8		$	1,952.5
Debt investments as a % of portfolio (at cost)	70.8		%	95.4		%
Equity investments as a % of portfolio (at cost)	29.2		%	4.6		%
% of debt investments at cost secured by first priority lien	99.2		%	99.9		%
Weighted-average annual effective yield (b)	12.8		%	11.8		%
Average EBITDA (c)	$	10.2		$	30.5

___________________________

(a)As of December 31, 2024, Main Street had equity ownership in all of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 38%.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

(b)The weighted-average annual effective yields were computed using the effective interest rates for all debt investments as of December 31, 2024, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status, and are weighted based upon the principal amount of each applicable debt investment as of December 31, 2024. The weighted-average annual effective yield on Main Street’s debt portfolio as of December 31, 2024, including debt investments on non-accrual status, was 12.3% for its LMM portfolio and 11.5% for its Private Loan portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor.

(c)The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan portfolio. These calculations exclude certain portfolio companies, including five LMM portfolio companies and five Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate and those portfolio companies whose primary operations have ceased and only residual value remains.

For the three months ended June 30, 2025 and 2024, Main Street achieved an annualized total return on investments of 16.4% and 15.7%, respectively. For each of the six months ended June 30, 2025 and 2024, Main Street achieved an annualized total return on investments of 16.2%. For the year ended December 31, 2024, Main Street achieved a total return on investments of 17.9%. Total return on investments is calculated using the interest, dividend and fee income, as well as the realized and unrealized change in fair value of the Investment Portfolio for the specified period. Main Street’s total return on investments is not reflective of what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect changes in the market value of Main Street’s stock, Main Street’s utilization of debt capital in its capital structure, Main Street’s expenses or any sales load paid by an investor.

As of June 30, 2025, Main Street had Middle Market portfolio investments in 12 portfolio companies, collectively totaling $108.7 million in fair value and $134.2 million in cost basis, which comprised 2.1% and 3.1% of Main Street’s Investment Portfolio at fair value and cost, respectively. As of December 31, 2024, Main Street had Middle Market portfolio investments in 15 portfolio companies, collectively totaling $155.3 million in fair value and $195.0 million in cost basis, which comprised 3.1% and 4.6% of Main Street’s Investment Portfolio at fair value and cost, respectively.

As of June 30, 2025, Main Street had Other Portfolio investments in 32 entities, spread across 12 investment managers, collectively totaling $122.7 million in fair value and $126.0 million in cost basis, which comprised 2.4% and 2.9% of Main Street’s Investment Portfolio at fair value and cost, respectively. As of December 31, 2024, Main Street had Other Portfolio investments in 31 entities, spread across 12 investment managers, collectively totaling $124.1 million in fair value and $122.5 million in cost basis, which comprised 2.5% and 2.9% of Main Street’s Investment Portfolio at fair value and cost, respectively.

As discussed further in Note A.1. — Organization and Basis of Presentation — Organization, Main Street holds an investment in the External Investment Manager, a wholly-owned subsidiary that is treated as a portfolio investment. As of June 30, 2025, this investment had a fair value of $272.6 million and a cost basis of $29.5 million, which comprised 5.4% and 0.7% of Main Street’s Investment Portfolio at fair value and cost, respectively. As of December 31, 2024, this investment had a fair value of $246.0 million and a cost basis of $29.5 million, which comprised 5.0% and 0.7% of Main Street’s Investment Portfolio at fair value and cost, respectively.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments at cost and fair value by type of investment as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments, as of June 30, 2025 and December 31, 2024 (this information excludes Other Portfolio investments and the External Investment Manager, which are discussed above).


Cost:	June 30, 2025		December 31, 2024
First lien debt	81.5	%	82.9	%
Equity	17.9		16.4
Second lien debt	0.1		0.2
Equity warrants	0.3		0.3
Other	0.2		0.2
	100.0	%	100.0	%


Fair Value:	June 30, 2025		December 31, 2024
First lien debt	70.5	%	71.4	%
Equity	28.7		27.8
Second lien debt	0.1		0.2
Equity warrants	0.5		0.4
Other	0.2		0.2
	100.0	%	100.0	%

The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments by geographic region of the United States and other countries at cost and fair value as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments, as of June 30, 2025 and December 31, 2024 (this information excludes Other Portfolio investments and the External Investment Manager). The geographic composition is determined by the location of the corporate headquarters of the portfolio company.


Cost:	June 30, 2025		December 31, 2024
West	26.0	%	25.1	%
Midwest	21.2		22.7
Northeast	19.6		21.2
Southwest	19.5		16.7
Southeast	11.1		11.6
Canada	1.2		1.3
Other Non-United States	1.4		1.4
	100.0	%	100.0	%


Fair Value:	June 30, 2025		December 31, 2024
West	25.2	%	24.1	%
Southwest	23.1		20.1
Midwest	22.4		24.2
Northeast	17.0		19.4
Southeast	9.9		9.7
Canada	1.1		1.2
Other Non-United States	1.3		1.3
	100.0	%	100.0	%

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Main Street’s LMM, Private Loan and Middle Market portfolio investments are in companies conducting business in a variety of industries. The following tables summarize the composition of Main Street’s total combined LMM, Private Loan and Middle Market portfolio investments by industry at cost and fair value as of June 30, 2025 and December 31, 2024 (this information excludes Other Portfolio investments and the External Investment Manager).


Cost:	June 30, 2025		December 31, 2024
Machinery	8.9	%	9.2	%
Internet Software & Services	6.7		7.1
Commercial Services & Supplies	6.5		5.5
Electrical Equipment	6.0		3.9
Distributors	5.7		4.0
Professional Services	5.3		5.4
Construction & Engineering	4.4		3.8
Diversified Consumer Services	4.0		4.3
IT Services	4.0		4.1
Auto Components	3.7		4.0
Containers & Packaging	3.7		3.8
Health Care Providers & Services	3.3		4.3
Textiles, Apparel & Luxury Goods	2.7		2.8
Tobacco	2.7		2.8
Energy Equipment & Services	2.6		2.8
Leisure Equipment & Products	2.3		2.4
Software	2.3		2.2
Computers & Peripherals	2.2		2.8
Communications Equipment	2.0		2.1
Specialty Retail	2.0		2.0
Media	1.6		1.7
Food Products	1.5		1.6
Chemicals	1.3		1.3
Food & Staples Retailing	1.3		1.6
Hotels, Restaurants & Leisure	1.3		1.3
Oil, Gas & Consumable Fuels	1.3		—
Aerospace & Defense	1.2		1.6
Internet & Catalog Retail	1.1		1.1
Health Care Equipment & Supplies	0.9		1.1
Diversified Financial Services	0.8		1.4
Building Products	0.4		1.5
Other (1)	6.3		6.5
	100.0	%	100.0	%

___________________________

(1)Includes various industries with each industry individually less than 1.0% of the total combined LMM, Private Loan and Middle Market portfolio investments at each date.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)


Fair Value:	June 30, 2025		December 31, 2024
Machinery	11.0	%	11.0	%
Commercial Services & Supplies	5.9		4.8
Distributors	5.8		4.2
Diversified Consumer Services	5.8		6.0
Electrical Equipment	5.6		3.7
Internet Software & Services	5.4		5.9
Professional Services	5.3		5.2
Construction & Engineering	4.7		4.3
Computers & Peripherals	4.0		4.6
Containers & Packaging	3.7		3.8
IT Services	3.4		3.7
Auto Components	3.3		3.6
Health Care Providers & Services	3.1		4.5
Tobacco	2.8		2.9
Energy Equipment & Services	2.7		2.9
Specialty Retail	2.5		2.5
Software	2.4		2.3
Textiles, Apparel & Luxury Goods	1.9		1.9
Communications Equipment	1.8		1.4
Leisure Equipment & Products	1.7		1.7
Media	1.7		1.9
Chemicals	1.2		1.2
Food Products	1.2		1.5
Oil, Gas & Consumable Fuels	1.2		—
Aerospace & Defense	1.1		1.6
Food & Staples Retailing	1.1		1.2
Internet & Catalog Retail	0.9		1.0
Diversified Financial Services	0.7		1.3
Building Products	0.4		1.4
Other (1)	7.7		8.0
	100.0	%	100.0	%

___________________________

(1)Includes various industries with each industry individually less than 1.0% of the total combined LMM, Private Loan and Middle Market portfolio investments at each date.

As of June 30, 2025 and December 31, 2024, Main Street had no portfolio investment that was greater than 10% of the Investment Portfolio at fair value.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Unconsolidated Significant Subsidiaries

In accordance with Rules 3-09 and 4-08(g) of Regulation S-X, Main Street must determine which of its unconsolidated controlled portfolio companies, if any, are considered “significant subsidiaries.” In evaluating its unconsolidated controlled portfolio companies in accordance with Regulation S-X, there are two tests that Main Street must utilize to determine if any of Main Street’s Control investments (as defined in Note A — Organization and Basis of Presentation), including those unconsolidated portfolio companies defined as Control investments in which Main Street does not own greater than 50% of the voting securities nor have rights to maintain greater than 50% of the board representation, are considered significant subsidiaries: the investment test and the income test. The investment test is generally measured by dividing Main Street’s investment in the Control investment by the value of Main Street’s total investments. The income test is generally measured by dividing the absolute value of the combined sum of total investment income, net realized gain (loss) and net unrealized appreciation (depreciation) from the relevant Control investment for the period being tested by the absolute value of Main Street’s change in net assets resulting from operations for the same period. Rules 3-09 and 4-08(g) of Regulation S-X require Main Street to include (1) separate audited financial statements of an unconsolidated majority-owned subsidiary (Control investments in which Main Street owns greater than 50% of the voting securities) in an annual report and (2) summarized financial information of a Control investment in a quarterly report, respectively, if certain thresholds of the investment or income tests are exceeded and the unconsolidated portfolio company qualifies as a significant subsidiary.

As of June 30, 2025, the External Investment Manager qualified as a significant subsidiary under the income test of Rule 4-08(g) of Regulation S-X. The summarized financial information for the External Investment Manager is included in Note D — External Investment Manager. As of December 31, 2024, Main Street had no single investment that qualified as a significant subsidiary under either the investment or income tests.

NOTE D — EXTERNAL INVESTMENT MANAGER

As discussed further in Note A.1. — Organization and Basis of Presentation — Organization and Note C — Fair Value Hierarchy for Investments — Portfolio Composition — Investment Portfolio Composition, the External Investment Manager provides investment management and other services to External Parties. The External Investment Manager is accounted for as a portfolio investment of Main Street since the External Investment Manager conducts all of its investment management activities for External Parties.

The External Investment Manager serves as the investment adviser and administrator to MSC Income pursuant to an Investment Advisory and Administrative Services Agreement entered into in October 2020 between the External Investment Manager and MSC Income (as amended and restated on January 29, 2025, the “Advisory Agreement”). Under the Advisory Agreement, prior to January 29, 2025, the External Investment Manager earned a 1.75% annual base management fee on MSC Income’s average total assets, a subordinated incentive fee on income equal to 20% of pre-incentive fee net investment income above a specified investment return hurdle rate and a 20% incentive fee on cumulative net realized capital gains in exchange for providing advisory services to MSC Income. On and after January 29, 2025, under the Advisory Agreement, the External Investment Manager earns a 1.5% annual base management fee on MSC Income’s average total assets (including cash and cash equivalents), payable quarterly in arrears (with additional future contractual reductions based upon changes to MSC Income’s investment portfolio composition), a subordinated incentive fee on income equal to 17.5% of pre-incentive fee net investment income above a specified investment return hurdle rate, subject to a 50% / 50% catch-up feature, and a 17.5% incentive fee on cumulative net realized capital gains from January 29, 2025.

As described more fully in Note L — Related Party Transactions, the External Investment Manager also serves as the investment adviser and administrator to MS Private Loan Fund I, LP ( “Private Loan Fund I”) and MS Private Loan Fund II, LP (“Private Loan Fund II”), each a private investment fund with a strategy to co-invest with Main Street in Private Loan portfolio investments. The External Investment Manager entered into investment management agreements in December 2020 with Private Loan Fund I and in September 2023 with Private Loan Fund II, pursuant to which the External Investment Manager provides investment advisory and management services to each fund in exchange for an asset-based fee and certain incentive fees. The External Investment Manager may also advise other clients, including funds and separately managed accounts, pursuant to advisory and services agreements with such clients in exchange for asset-based and incentive fees.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

The External Investment Manager provides administrative services for certain External Party clients that, to the extent not waived, are reported as administrative services fees. The administrative services fees generally represent expense reimbursements for a portion of the compensation, overhead and related expenses for certain professionals directly attributable to performing administrative services for clients. These fees are recognized as other revenue in the period in which the related services are rendered.

Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach (see further discussion in Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio). Any change in fair value of the investment in the External Investment Manager is recognized on Main Street’s Consolidated Statements of Operations in “Net Unrealized Appreciation — Control investments.”

The External Investment Manager is an indirect wholly-owned subsidiary of MSCC owned through a Taxable Subsidiary and is a disregarded entity for tax purposes. The External Investment Manager has entered into a tax sharing agreement with its Taxable Subsidiary owner. Since the External Investment Manager is accounted for as a portfolio investment of Main Street and is not included as a consolidated subsidiary of Main Street in its consolidated financial statements, and as a result of the tax sharing agreement with its Taxable Subsidiary owner, for financial reporting purposes the External Investment Manager is treated as if it is taxed at corporate income tax rates based on its taxable income and, as a result of its activities, may generate income tax expense or benefit. Main Street owns the External Investment Manager through the Taxable Subsidiary to allow MSCC to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The taxable income, or loss, of the External Investment Manager may differ from its book income, or loss, due to temporary book and tax timing differences and permanent differences. As a result of the above described financial reporting and tax treatment, the External Investment Manager provides for any income tax expense, or benefit, and any tax assets or liabilities in its separate financial statements.

Main Street shares employees with the External Investment Manager and allocates costs related to such shared employees to the External Investment Manager generally based on a combination of the direct time spent, new investment activities and assets under management, depending on the nature of the expense. The total contribution of the External Investment Manager to Main Street’s net investment income consists of the combination of the expenses allocated to the External Investment Manager and the dividend income earned from the External Investment Manager. For the three months ended June 30, 2025 and 2024, the total contribution to Main Street’s net investment income was $8.7 million and $9.2 million, respectively. For the six months ended June 30, 2025 and 2024, the total contribution to Main Street’s net investment income was $16.6 million and $17.8 million, respectively.

Summarized financial information from the separate financial statements of the External Investment Manager as of June 30, 2025 and December 31, 2024 and for the three and six months ended June 30, 2025 and 2024 is as follows:


	As of June 30, 2025		As of December 31, 2024
	(in thousands)

Accounts receivable - advisory clients	$	10,688	$	10,183
Intangible asset	29,500		29,500
Total assets	$	40,188	$	39,683

Accounts payable to MSCC and its subsidiaries	$	7,839	$	7,785
Dividend payable to MSCC and its subsidiaries	2,849		2,398
Equity	29,500		29,500
Total liabilities and equity	$	40,188	$	39,683

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)


	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
	(in thousands)
Management fee income	$	5,707	$	5,886	$	11,459	$	11,603
Incentive fees	3,721		4,117		6,411		7,983
Administrative services fees	172		159		346		315
Total revenues	9,600		10,162		18,216		19,901
Expenses allocated from MSCC or its subsidiaries:
Salaries, share-based compensation and other personnel costs	(4,921)		(5,021)		(9,472)		(9,855)
Other G&A expenses	(971)		(866)		(1,756)		(1,591)
Total allocated expenses	(5,892)		(5,887)		(11,228)		(11,446)
Other direct G&A expenses	(11)		(15)		(49)		(24)
Total expenses	(5,903)		(5,902)		(11,277)		(11,470)
Pre-tax income	3,697		4,260		6,939		8,431
Tax expense	(848)		(948)		(1,596)		(2,118)
Net income	$	2,849	$	3,312	$	5,343	$	6,313

NOTE E — DEBT

Summary of Main Street’s debt as of June 30, 2025 is as follows:


	Outstanding Balance		Unamortized Debt Issuance (Costs)/Premiums (1)		Recorded Value		Estimated Fair Value (2)
	(in thousands)
Corporate Facility	$	301,000	$	—	$	301,000	$	301,000
SPV Facility	176,000		—		176,000		176,000
July 2026 Notes	500,000		(548)		499,452		490,030
June 2027 Notes	400,000		(575)		399,425		409,448
March 2029 Notes	350,000		(2,639)		347,361		364,606
SBIC debentures	350,000		(5,995)		344,005		300,329
December 2025 Notes	150,000		(259)		149,741		150,329
Total Debt	$	2,227,000	$	(10,016)	$	2,216,984	$	2,191,742

___________________________

(1)The unamortized debt issuance costs for the Credit Facilities are reflected as Deferred financing costs on the Consolidated Balance Sheets, while the deferred debt issuance costs related to the July 2026 Notes, June 2027 Notes, March 2029 Notes, SBIC debentures and December 2025 Notes are reflected as contra-liabilities on the Consolidated Balance Sheets.

(2)Estimated fair value for outstanding debt is shown as if Main Street had adopted the fair value option under ASC 825. See discussion of the methods used to estimate the fair value of Main Street’s debt in Note B.12. — Summary of Significant Accounting Policies — Fair Value of Financial Instruments.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Summary of Main Street’s debt as of December 31, 2024 is as follows:


	Outstanding Balance		Unamortized Debt Issuance (Costs)/Premiums (1)		Recorded Value		Estimated Fair Value (2)
	(in thousands)
Corporate Facility	$	208,000	$	—	$	208,000	$	208,000
SPV Facility	176,000		—		176,000		176,000
July 2026 Notes	500,000		(812)		499,188		482,180
June 2027 Notes	400,000		(718)		399,282		407,388
March 2029 Notes	350,000		(2,998)		347,002		364,959
SBIC debentures	350,000		(6,583)		343,417		298,250
December 2025 Notes	150,000		(518)		149,482		149,940
Total Debt	$	2,134,000	$	(11,629)	$	2,122,371	$	2,086,717

___________________________

Summarized interest expense for the three and six months ended June 30, 2025 and 2024 is as follows:


	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
	(in thousands)
Corporate Facility	$	5,867	$	7,240	$	10,324	$	11,522
SPV Facility	3,771		3,096		7,587		4,774
July 2026 Notes	3,882		3,882		7,763		7,763
June 2027 Notes	6,572		1,473		13,144		1,473
March 2029 Notes	6,261		6,261		12,522		11,747
SBIC debentures	3,135		2,273		6,286		4,979
December 2025 Notes	3,031		3,031		6,061		6,061
May 2024 Notes	—		1,905		—		7,618
Total Interest Expense	$	32,519	$	29,161	$	63,687	$	55,937

A summary of Main Street’s average amount of total borrowings outstanding and overall weighted-average effective interest rate including amortization of debt issuance costs, original issuance discounts and premiums and fees on unused lender commitments are as follows:


	Three Months Ended June 30,						Six Months Ended June 30,
	2025			2024			2025			2024
	(dollars in millions)
Weighted-average borrowings outstanding	$	2,233.1		$	2,019.4		$	2,192.0		$	2,000.9
Weighted-average effective interest rate	5.8		%	5.8		%	5.8		%	5.6		%

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Corporate Facility

Main Street maintains a multi-year revolving credit facility (the “Corporate Facility”) to provide additional liquidity to support its investment and operational activities. In April 2025, Main Street entered into an amendment to the Corporate Facility to, among other things: (i) decrease the interest rate to the applicable SOFR plus a credit spread adjustment of 0.10% plus (a) 1.775% prior to satisfying certain step-down conditions or (b) 1.65% after satisfying certain step-down conditions, (ii) increase the revolving commitments to $1.145 billion, (iii) increase the accordion feature providing Main Street with the right to request increases in commitments under the facility from new and existing lenders on the same terms and conditions as the existing commitments to up to a total of $1.718 billion and (iv) extend the revolving period and final maturity date through April 2029 and to April 2030, respectively.

As of June 30, 2025, the Corporate Facility included (i) total commitments of $1.145 billion from a diversified group of 19 lenders, (ii) an accordion feature with the right to request an increase in commitments under the facility from new and existing lenders on the same terms and conditions as the existing commitments up to a total of $1.718 billion and (iii) a revolving period through April 2029 and a final maturity date in April 2030.

As of June 30, 2025, borrowings under the Corporate Facility bore interest, subject to Main Street’s election and resetting on a monthly basis on the first of each month, at a rate equal to the applicable SOFR plus a credit spread adjustment of 0.10% plus 1.775% (or 1.65% after satisfying certain step-down conditions in the future). Main Street pays unused commitment fees of 0.25% on the unused lender commitments under the Corporate Facility. The Corporate Facility is secured by a first lien on the assets of MSCC and its subsidiaries, excluding the equity ownership and assets of the Funds, the Structured Subsidiaries and the External Investment Manager. In connection with the Corporate Facility, MSCC has made customary representations and warranties and is required to comply with various covenants, reporting requirements and other customary requirements for similar credit facilities.

As of June 30, 2025, the interest rate for borrowings on the Corporate Facility was 6.2%. The average interest rate for borrowings under the Corporate Facility was 6.2% and 7.3% for the three months ended June 30, 2025 and 2024, respectively, and 6.3% and 7.3% for the six months ended June 30, 2025 and 2024, respectively. As of June 30, 2025, Main Street was in compliance with all financial covenants of the Corporate Facility.

SPV Facility

Main Street, through MSCC Funding I, LLC (“MSCC Funding”), a wholly-owned Structured Subsidiary that primarily holds debt investments, maintains a special purpose vehicle revolving credit facility (the “SPV Facility” and, together with the Corporate Facility, the “Credit Facilities”) to finance its investment and operational activities. In April 2025, Main Street entered into an amendment to the SPV Facility to, among other things: (i) decrease the interest rate to the applicable SOFR plus an applicable margin of (a) 1.95% during the revolving period (from 2.35%), (b) 2.075% for the first year following the end of the revolving period (from 2.475%) and (c) 2.20% for the second year following the end of the revolving period (from 2.60%), (ii) extend the revolving period from through September 2027 to through September 2028, (iii) extend the final maturity date from September 2029 to September 2030 and (iv) decrease the unused fee to 0.40% (from 0.50%) on the unused amount up to 50% (from 35%) of the commitment amount.

As of June 30, 2025, the SPV Facility included (i) total commitments of $600.0 million from a diversified group of six lenders, (ii) an accordion feature providing MSCC Funding with the right to request increases in commitments under the facility, subject to the satisfaction of various conditions, from new and existing lenders on the same terms and conditions as the existing commitments to up to a total of $800.0 million and (iii) a revolving period through September 2028 and a final maturity date in September 2030. Advances under the SPV Facility bear interest at a rate equal to the applicable SOFR in effect, plus an applicable margin of 1.95% during the revolving period and 2.075% and 2.20% during the first and second years thereafter, respectively. MSCC Funding pays a commitment fee of 0.40% on the unused lender commitments up to 50% of the total lender commitments and 0.75% on the unused lender commitments greater than 50% of the total lender commitments. The SPV Facility is secured by a collateral loan on the assets of MSCC Funding and its subsidiaries. In connection with the SPV Facility, MSCC Funding has made customary representations and warranties and is required to comply with various covenants, reporting requirements and other customary requirements for similar credit facilities.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

As of June 30, 2025, the interest rate for borrowings on the SPV Facility was 6.3%. The average interest rate for borrowings under the SPV Facility was 6.4% and 7.9% for the three months ended June 30, 2025 and 2024, respectively, and 6.5% and 7.9% for the six months ended June 30, 2025 and 2024, respectively. As of June 30, 2025, MSCC Funding was in compliance with all financial covenants of the SPV Facility.

MSCC Funding’s balance sheets as of June 30, 2025 and December 31, 2024 are as follows:

Balance Sheets

(in thousands)


	June 30, 2025		December 31, 2024
	(Unaudited)
ASSETS
Investments at fair value:


Non-Control investments (cost: $351,592 and $351,053 as of June 30, 2025 and December 31, 2024, respectively)	$	349,140	$	350,892

Cash and cash equivalents	7,785		11,212
Interest and dividend receivable and other assets	3,581		4,124


Deferred financing costs (net of accumulated amortization of $2,565 and $1,859 as of June 30, 2025 and December 31, 2024, respectively)	7,833		6,512
Total assets	$	368,339	$	372,740
LIABILITIES
SPV Facility	$	176,000	$	176,000
Accounts payable and other liabilities to affiliates	—		65

Interest payable	1,096		1,229


Total liabilities	177,096		177,294

NET ASSETS

Contributed capital	123,490		138,088




Total undistributed earnings	67,753		57,358
Total net assets	191,243		195,446
Total liabilities and net assets	$	368,339	$	372,740

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

MSCC Funding’s statements of operations for the three and six months ended June 30, 2025 and 2024 are as follows:

Statements of Operations
(in thousands)

(Unaudited)


	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
INVESTMENT INCOME:
Interest, fee and dividend income:


Non‑Control/Non‑Affiliate investments	$	10,491	$	10,118	$	21,089	$	21,185
Total investment income	10,491		10,118		21,089		21,185
EXPENSES:
Interest	(3,771)		(3,096)		(7,587)		(4,774)
Management fee to MSCC	(453)		(395)		(743)		(800)
General and administrative	(6)		(18)		(75)		(36)
Total expenses	(4,230)		(3,509)		(8,405)		(5,610)
NET INVESTMENT INCOME	6,261		6,609		12,684		15,575






NET UNREALIZED APPRECIATION (DEPRECIATION):


Non‑Control/Non‑Affiliate investments	(2,353)		(769)		(2,290)		(1,246)

Total net unrealized depreciation	(2,353)		(769)		(2,290)		(1,246)




NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS	$	3,908	$	5,840	$	10,394	$	14,329

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

July 2026 Notes

In January 2021, Main Street issued $300.0 million in aggregate principal amount of 3.00% unsecured notes due July 14, 2026 (the “July 2026 Notes”) at an issue price of 99.004%. Subsequently, in October 2021, Main Street issued an additional $200.0 million in aggregate principal amount of the July 2026 Notes at an issue price of 101.741%. The July 2026 Notes issued in October 2021 have identical terms as, and are a part of a single series with, the July 2026 Notes issued in January 2021. The July 2026 Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness. The July 2026 Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The July 2026 Notes bear interest at a rate of 3.00% per year payable semiannually on January 14 and July 14 of each year.

As of June 30, 2025, Main Street was in compliance with all covenants and other requirements of the July 2026 Notes.

June 2027 Notes

In June 2024, Main Street issued $300.0 million in aggregate principal amount of 6.50% unsecured notes due June 4, 2027 (the “June 2027 Notes”) at an issue price of 99.793%. Subsequently, in September 2024, Main Street issued an additional $100.0 million in aggregate principal amount of the June 2027 Notes at a public offering price of 102.134% resulting in a yield-to-maturity of 5.617% on such issuance. The $400.0 million of outstanding June 2027 Notes bear interest at 6.50% per year with a yield-to-maturity of 6.34%. The June 2027 Notes issued in September 2024 have identical terms as, and are a part of a single series with, the June 2027 Notes issued in June 2024. The June 2027 Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness. The June 2027 Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The June 2027 Notes bear interest at a rate of 6.50% per year payable semiannually on June 4 and December 4 of each year.

As of June 30, 2025, Main Street was in compliance with all covenants and other requirements of the June 2027 Notes.

March 2029 Notes

In January 2024, Main Street issued $350.0 million in aggregate principal amount of 6.95% unsecured notes due March 1, 2029 (the “March 2029 Notes”) at an issue price of 99.865%. The March 2029 Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness. The March 2029 Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The March 2029 Notes bear interest at a rate of 6.95% per year payable semiannually on March 1 and September 1 of each year.

As of June 30, 2025, Main Street was in compliance with all covenants and other requirements of the March 2029 Notes.

SBIC Debentures

Under existing SBIC regulations, SBA-approved SBICs under common control have the ability to issue debentures guaranteed by the SBA up to a regulatory maximum amount of $350.0 million. Under existing SBA-approved commitments, Main Street, through the Funds, had $350.0 million of outstanding SBIC debentures as of both June 30, 2025 and December 31, 2024. SBIC debentures provide for interest to be paid semiannually, with principal due at the applicable 10-year maturity date of each debenture. The principal amount of the debentures is not required to be paid before maturity, but may be pre-paid at any time with no prepayment penalty. The weighted-average annual interest rate on the SBIC debentures was 3.3% as of both June 30, 2025 and December 31, 2024. The first principal maturity due under the existing SBIC debentures is in 2027, and the weighted-average remaining duration as of June 30, 2025 was 5.1 years. In accordance with SBIC regulations, the Funds are precluded from incurring additional non-SBIC debt without the prior approval of the SBA. Main Street expects to maintain SBIC debentures under the SBIC program in the future, subject to periodic repayments and borrowings, in an amount up to the regulatory maximum amount for affiliated SBIC funds.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

As of June 30, 2025, the SBIC debentures consisted of (i) $175.0 million par value of SBIC debentures issued by MSMF, with a recorded value of $170.6 million net of unamortized debt issuance costs of $4.4 million, and (ii) $175.0 million par value of SBIC debentures issued by MSC III, with a recorded value of $173.4 million net of unamortized debt issuance costs of $1.6 million.

December 2025 Notes

In December 2022, Main Street issued $100.0 million in aggregate principal amount of 7.84% Series A unsecured notes due December 23, 2025 (the “December 2025 Series A Notes”) at par. In February 2023, Main Street issued an additional $50.0 million in aggregate principal amount of 7.53% Series B unsecured notes due December 23, 2025 (the “December 2025 Series B Notes” and, together with the December 2025 Series A Notes, the “December 2025 Notes”) at par. The December 2025 Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness. The December 2025 Notes may be redeemed in whole or in part at any time at Main Street’s option at par plus accrued interest to the prepayment date, subject to certain make-whole provisions. The December 2025 Series A Notes and the December 2025 Series B Notes bear interest at a rate of 7.84% and 7.53% per year, respectively, payable semiannually on June 23 and December 23 of each year. In addition, Main Street is obligated to offer to repay the December 2025 Notes at par plus accrued and unpaid interest if certain change in control events occur. The December 2025 Notes will bear interest at an increased rate from the date that (i) the December 2025 Notes receive a below investment grade rating by a rating agency if there is one or two rating agencies providing ratings of the December 2025 Notes, or two-thirds of the rating agencies if there are three rating agencies who are rating the notes (a “Below Investment Grade Event”), or (ii) the ratio of the Company’s consolidated secured indebtedness (other than indebtedness of the Funds or any Structured Subsidiaries) to the value of its consolidated total assets is greater than 0.35 to 1.00 (a “Secured Debt Ratio Event”), to and until the date on which the Below Investment Grade Event and the Secured Debt Ratio Event are no longer continuing. The governing agreement for the December 2025 Notes contains customary terms and conditions for senior unsecured notes issued in a private placement, as well as customary events of default with customary cure and notice periods.

As of June 30, 2025, Main Street was in compliance with all covenants and other requirements of the December 2025 Notes.

May 2024 Notes

In May 2024, Main Street repaid the $450.0 million principal amount of the issued and outstanding 5.20% unsecured notes (the “May 2024 Notes”) at maturity at par value plus the accrued and unpaid interest.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

NOTE F — FINANCIAL HIGHLIGHTS

The following is a schedule of financial highlights of Main Street for the six months ended June 30, 2025 and 2024:


	Six Months Ended June 30,
Per Share Data:	2025		2024
NAV as of the beginning of the period	$	31.65	$	29.20
Net investment income (1)	1.96		1.99
Net realized gain (loss) (1)(2)	0.26		(0.10)
Net unrealized appreciation (1)(2)	0.49		0.74
Income tax provision on net realized gain and net unrealized appreciation (1)(2)	(0.03)		(0.18)
Net increase in net assets resulting from operations (1)	2.68		2.45
Dividends paid from net investment income (3)	(2.10)		(2.04)

Dividends paid (3)	(2.10)		(2.04)
Impact of the net change in monthly dividends declared prior to the end of the period and paid in the subsequent period	—		(0.01)
Accretive effect of stock offerings (issuing shares above NAV per share)	0.08		0.21
Accretive effect of DRIP issuance (issuing shares above NAV per share)	0.09		0.07
Other (4)	(0.10)		(0.08)
NAV as of the end of the period	$	32.30	$	29.80
Market value as of the end of the period	$	59.10	$	50.49
Shares outstanding as of the end of the period	89,282,595		86,552,506

___________________________

(1)Based on weighted-average number of common shares outstanding for the period.

(2)Net realized gains or losses, net unrealized appreciation or depreciation and related income tax provision or benefit can fluctuate significantly from period to period.

(3)MSCC’s taxable income for each period is an estimate and will not be finally determined until MSCC files its tax return for each year. As a result, the character of MSCC’s dividends and distributions for each period is also an estimate. Therefore, the final character of MSCC’s dividends and distributions may be different than this estimate.

(4)Includes the impact of the different share amounts as a result of calculating certain per share data based on the weighted-average basic shares outstanding during the period and certain per share data based on the shares outstanding as of a period end or transaction date.

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)


	Six Months Ended June 30,
	2025			2024
	(dollars in thousands)
NAV as of the end of the period	$	2,884,217		$	2,578,956
Average NAV	$	2,840,729		$	2,524,108
Average outstanding debt	$	2,206,714		$	2,051,543

Ratios to average NAV:
Ratio of total expenses, including income tax expense, to average NAV (1)(2)	3.86		%	4.31		%
Ratio of operating expenses to average NAV (2)(3)	3.45		%	3.43		%
Ratio of operating expenses, excluding interest expense, to average NAV (2)(3)	1.20		%	1.22		%
Ratio of net investment income to average NAV (2)	6.13		%	6.75		%
Portfolio turnover ratio (2)	11.40		%	8.62		%
Total investment return (2)(4)	4.67		%	21.97		%
Total return based on change in NAV (2)(5)	8.53		%	8.47		%

___________________________

(1)Total expenses are the sum of operating expenses and all tax expenses. The total tax provision or benefit includes the accrual of net deferred tax provision or benefit relating to book versus tax differences on income at the Taxable Subsidiaries that is included in net investment income, the net unrealized appreciation or depreciation on portfolio investments held in Taxable Subsidiaries and due to the change in the loss carryforwards, which are non-cash in nature and may vary significantly from period to period. Main Street is required to include net deferred tax provision or benefit in calculating its total expenses even though these net deferred taxes are not currently payable or receivable.

(2)Not annualized.

(3)Unless otherwise noted, operating expenses include interest, compensation, general and administrative and share-based compensation expenses, net of expenses allocated to the External Investment Manager of $11.2 million and $11.4 million for the six months ended June 30, 2025 and 2024, respectively.

(4)Total investment return is based on the purchase of stock at the current market price on the first day and a sale at the current market price on the last day of each period reported on the table and assumes reinvestment of dividends at prices obtained by Main Street’s dividend reinvestment plan during the period. The return does not reflect any sales load that may be paid by an investor.

(5)Total return based on change in NAV was calculated using the sum of ending NAV plus dividends to stockholders and other non-operating changes during the period, divided by the beginning NAV. Non-operating changes include any items that affect NAV other than the net increase in net assets resulting from operations, such as the effects of stock offerings, shares issued under the DRIP and equity incentive plans and other miscellaneous items.

100

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

NOTE G — DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME

Main Street currently pays regular monthly dividends to its stockholders and periodically pays supplemental dividends to its stockholders. Future dividends, if any, will be determined by its Board of Directors on a quarterly basis.

Summarized dividend information for the three and six months ended June 30, 2025 and 2024 is as follows:


	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
	(in thousands, except per share amounts)
Regular monthly dividends per share	$	0.75	$	0.72	$	1.50	$	1.44
Supplemental quarterly dividends per share	0.30		0.30		0.60		0.60
Total dividends per share	$	1.05	$	1.02	$	2.10	$	2.04

Total regular monthly dividends paid	$	66,908	$	61,958	$	133,416	$	123,226
Total supplemental quarterly dividends paid	26,818		25,996		53,457		51,563
Total dividends paid	$	93,726	$	87,954	$	186,873	$	174,789

MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds and Structured Subsidiaries, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to twelve months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated.

The determination of the tax attributes for Main Street’s distributions is made annually, based upon its taxable income for the full year and distributions paid for the full year. Therefore, a determination made on an interim basis may not be representative of the actual tax attributes of distributions for a full year. Ordinary dividend distributions from a RIC do not qualify for the 20% maximum tax rate (plus a 3.8% Medicare surtax, if applicable) on dividend income from domestic corporations and qualified foreign corporations, except to the extent that the RIC received the income in the form of qualifying dividends from domestic corporations and qualified foreign corporations. The tax attributes for distributions will generally include both ordinary income and qualified dividends, but may also include either one or both of capital gains and return of capital.

101

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

Listed below is a reconciliation of “Net increase in net assets resulting from operations” to taxable income and to total distributions declared to common stockholders for the six months ended June 30, 2025 and 2024.


	Six Months Ended June 30,
	2025		2024
	(estimated, in thousands)
Net increase in net assets resulting from operations	$	238,616	$	209,835
Book-tax difference from share-based compensation expense	(15,311)		(10,123)
Net unrealized appreciation	(44,239)		(63,693)
Income tax provision	11,642		22,010
Pre-tax book income not consolidated for tax purposes	(85,884)		(33,694)
Book income and tax income differences, including debt origination, structuring fees, dividends, realized gains and changes in estimates	52,988		29,576
Estimated taxable income (1)	157,812		153,911
Taxable income earned in prior year and carried forward for distribution in current year	120,488		56,142
Taxable income earned prior to period end and carried forward for distribution next period	(113,496)		(55,633)
Dividend payable as of period end and paid in the following period	22,767		21,205
Total distributions accrued or paid to common stockholders	$	187,571	$	175,625

___________________________

(1)MSCC’s taxable income for each period is an estimate and will not be finally determined until MSCC files its tax return for each year. Therefore, the final taxable income, and the taxable income earned in each period and carried forward for distribution in the following period, may be different than this estimate.

The Taxable Subsidiaries primarily hold certain equity investments for Main Street. The Taxable Subsidiaries permit Main Street to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes and to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The Taxable Subsidiaries are consolidated with MSCC for U.S. GAAP financial reporting purposes, and the portfolio investments held by the Taxable Subsidiaries are included in Main Street’s consolidated financial statements as portfolio investments and recorded at fair value. The Taxable Subsidiaries are not consolidated with MSCC for income tax purposes and may generate income tax expense, or benefit, and tax assets and liabilities, as a result of their ownership of certain portfolio investments. The taxable income, or loss, of the Taxable Subsidiaries may differ from their book income, or loss, due to temporary book and tax timing differences and permanent differences. The Taxable Subsidiaries are each taxed at corporate income tax rates based on their taxable income. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the Taxable Subsidiaries are reflected in Main Street’s consolidated financial statements.

102

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

The income tax provision for Main Street is generally composed of (i) deferred tax expense, which is primarily the result of the net activity relating to the portfolio investments held in the Taxable Subsidiaries, including changes in loss carryforwards, changes in net unrealized appreciation or depreciation and other temporary book tax differences, and (ii) current tax expense, which is primarily the result of current U.S. federal income and state taxes relating to net currently taxable activity relating to the portfolio investments held in the Taxable Subsidiaries and excise taxes on Main Street’s estimated undistributed taxable income. The income tax expense, or benefit, and the related tax assets and liabilities generated by the Taxable Subsidiaries, if any, are reflected in Main Street’s Consolidated Statements of Operations. Main Street’s net investment income related taxes were comprised of the following for the three and six months ended June 30, 2025 and 2024:


	Three Months Ended June 30,				Six Months Ended June 30,
	2025		2024		2025		2024
	(in thousands)
Net investment income taxes
Current tax expense (benefit):
Federal	$	(164)	$	329	$	—	$	657
State and other	487		997		1,147		1,878
Excise	818		272		2,159		1,193
Total current tax expense	1,141		1,598		3,306		3,728

Deferred tax expense:
Federal	3,575		1,600		5,470		2,398
State and other	435		203		288		650
Total deferred tax expense	4,010		1,803		5,758		3,048

Total net investment income tax provision	$	5,151	$	3,401	$	9,064	$	6,776

Investment valuation related taxes
Current tax expense:
Federal	$	4,071	$	—	$	4,391	$	—


Total current tax expense	4,071		—		4,391		—

Deferred tax expense (benefit):
Federal	(3,343)		7,267		(72)		14,120
State and other	(1,610)		402		(1,741)		1,114
Total deferred tax expense (benefit)	(4,953)		7,669		(1,813)		15,234

Total investment valuation related income tax provision (benefit)	$	(882)	$	7,669	$	2,578	$	15,234

Total income tax provision	$	4,269	$	11,070	$	11,642	$	22,010

The net deferred tax liability as of June 30, 2025 and December 31, 2024 was $90.1 million and $86.1 million, respectively, with the change primarily related to changes in net unrealized appreciation or depreciation, changes in loss carryforwards and other temporary book-tax differences relating to portfolio investments held by the Taxable Subsidiaries. As of June 30, 2025, for U.S. federal income tax purposes, the Taxable Subsidiaries had a net operating loss carryforward from prior years which is not subject to expiration and will carryforward indefinitely until utilized. Additionally, the Taxable Subsidiaries have interest expense limitation carryforwards which have an indefinite carryforward period.

103

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

NOTE H — COMMON STOCK

Main Street maintains a program with certain selling agents through which it can sell shares of its common stock by means of at-the-market offerings from time to time (the “ATM Program”). During the six months ended June 30, 2025, Main Street sold 280,730 shares of its common stock at a weighted-average price of $57.47 per share and raised $16.1 million of gross proceeds under the ATM Program. Net proceeds were $15.8 million after commissions to the selling agents on shares sold and offering costs. As of June 30, 2025, sales transactions representing 7,482 shares had not settled and thus were not issued and not included in shares issued and outstanding on the face of the Consolidated Balance Sheets but are included as outstanding on the Consolidated Statement of Changes in Net Assets, in the weighted-average shares outstanding in the Consolidated Statements of Operations and in the shares used to calculate the NAV per share. In March 2025, Main Street entered into new distribution agreements to sell up to 20,000,000 shares through the ATM Program. As of June 30, 2025, 19,790,632 shares remained available for sale under the ATM Program.

During the year ended December 31, 2024, Main Street sold 2,489,275 shares of its common stock at a weighted-average price of $49.75 per share and raised $123.8 million of gross proceeds under the ATM Program. Net proceeds were $122.2 million after commissions to the selling agents on shares sold and offering costs.

NOTE I — DIVIDEND REINVESTMENT PLAN

The dividend reinvestment feature of Main Street’s dividend reinvestment and direct stock purchase plan (the “DRIP”) provides for the reinvestment of dividends on behalf of its stockholders, unless a stockholder has elected to receive dividends in cash. As a result, if Main Street declares a cash dividend, its stockholders who have not “opted out” of the DRIP by the dividend record date will have their cash dividend automatically reinvested into additional shares of Main Street common stock. The share requirements of the DRIP may be satisfied through the issuance of shares of common stock or through open market purchases of common stock by the DRIP plan administrator. Newly issued shares will be valued based upon the final closing price of Main Street’s common stock on the valuation date determined for each dividend by Main Street’s Board of Directors. Shares purchased in the open market to satisfy the DRIP requirements will be valued based upon the average price of the applicable shares purchased, before any associated brokerage or other costs. Main Street’s DRIP is administered by its transfer agent on behalf of Main Street’s record holders and participating brokerage firms. Brokerage firms and other financial intermediaries may decide not to participate in Main Street’s DRIP but may provide a similar dividend reinvestment plan for their clients.

Summarized DRIP information for the six months ended June 30, 2025 and 2024 is as follows:


	Six Months Ended June 30,
	2025		2024
	(dollars in thousands)
DRIP participation	$	18,466	$	17,229
Shares issued for DRIP	324,454		366,496

104

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

NOTE J — SHARE-BASED COMPENSATION

Main Street accounts for its share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation. Accordingly, for restricted stock awards (“RSAs”), Main Street measured the grant date fair value based upon the market price of its common stock on the date of the grant and amortizes the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term.

Main Street’s Board of Directors approves the issuance of shares of restricted stock to Main Street employees pursuant to the Main Street Capital Corporation 2022 Equity and Incentive Plan (the “Equity and Incentive Plan”). These shares generally vest over a three-year or five-year period from the grant date. The fair value is expensed over the service period, starting on the grant date. The following table summarizes the restricted stock issuances approved by Main Street’s Board of Directors under the Equity and Incentive Plan, net of shares forfeited, if any, and the remaining shares of restricted stock available for issuance as of June 30, 2025.


Restricted stock authorized under the plan			5,000,000
Less net restricted stock granted			(1,488,038)
Restricted stock available for issuance as of June 30, 2025			3,511,962

As of June 30, 2025, the following table summarizes the restricted stock issued to Main Street’s non-employee directors and the remaining shares of restricted stock available for issuance pursuant to the Main Street Capital Corporation 2022 Non-Employee Director Restricted Stock Plan. These shares are granted upon appointment or election to the board and vest on the day immediately preceding the annual meeting of stockholders following the respective grant date and are expensed over such service period.


Restricted stock authorized under the plan			300,000
Less net restricted stock granted			(14,455)
Restricted stock available for issuance as of June 30, 2025			285,545

For the three months ended June 30, 2025 and 2024, Main Street recognized total share-based compensation expense of $5.4 million and $4.9 million, respectively, related to the restricted stock issued to Main Street employees and non-employee directors. For the six months ended June 30, 2025 and 2024, Main Street recognized total share-based compensation expense of $10.3 million and $9.0 million, respectively.

Summarized RSA activity for the six months ended June 30, 2025 is as follows:


	Six Months Ended June 30, 2025
	Number			Weighted-Average Grant-Date Fair Value
Restricted Stock Awards (RSAs):	of Shares			(dollars per share)
Non-vested, December 31, 2024	1,039,417			$	43.62
Granted (1)	455,810			57.71
Vested (1)(2)	(455,608)			42.95
Forfeited	(13,231)			50.76
Non-vested, June 30, 2025	1,026,388			$	50.08
Aggregate intrinsic value as of June 30, 2025 (in thousands)	$	60,660	(3)

___________________________

(1)Restricted units generally vest over a three-year or five-year period from the grant date (as noted above).

(2)Vested shares included 177,024 shares withheld for payroll taxes paid on behalf of employees.

(3)Aggregate intrinsic value is the product of total non-vested restricted shares as of June 30, 2025 and $59.10 per share, the closing price of Main Street’s common stock on June 30, 2025.

105

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

As of June 30, 2025, there was $46.0 million of total unrecognized compensation expense related to Main Street’s non-vested restricted shares. This compensation expense is expected to be recognized over a remaining weighted-average period of 2.8 years as of June 30, 2025.

NOTE K — COMMITMENTS AND CONTINGENCIES

As of June 30, 2025, Main Street had the following outstanding commitments (in thousands):



Investments with equity capital commitments that have not yet funded:	Amount

Brightwood Capital Fund Investments
Brightwood Capital Fund V, LP	$	500
Brightwood Capital Fund III, LP	65
	565

EnCap Equity - Fund XII, LP	7,083

Harris Preston Fund Investments
HPEP 4, L.P.	5,742
HPEP 3, L.P.	1,308
423 AER II, LP	211
	7,261

MS Private Loan Fund I, LP	750

MS Private Loan Fund II, LP	6,000

UnionRock Energy Fund Investments
UnionRock Energy Fund III, LP	4,782
UnionRock Energy Fund II, LP	2,472
	7,254

Total Equity Commitments (1)(2)	$	28,913

Investments with commitments to fund revolving loans that have not been fully drawn or term loans with additional commitments not yet funded:

Mission Critical Group	$	39,040
ZRG Partners, LLC	20,795
TEC Services, LLC	16,167
Creative Foam Corporation	15,375
HEADLANDS OP-CO LLC	12,150
MS Private Loan Fund I, LP	11,000
MS Private Loan Fund II, LP	10,000
GradeEight Corp.	9,380
Ansira Partners II, LLC	8,341

106

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)


Richardson Sales Solutions						7,806
JDC Power Services, LLC						7,263
South Coast Terminals Holdings, LLC						7,160
California Splendor Holdings LLC						6,000
BP Loenbro Holdings Inc.						5,469
ITA Holdings Group, LLC						5,310
SI East, LLC						5,250
Electro Technical Industries, LLC						4,588
Gamber-Johnson Holdings, LLC						3,752
AVEX Aviation Holdings, LLC						3,684
Microbe Formulas, LLC						3,601
CenterPeak Holdings, LLC						3,600
Winter Services LLC						3,333
VVS Holdco LLC						3,200
Metalforming Holdings, LLC						2,795
PTL US Bidco, Inc						2,703
Career Team Holdings, LLC						2,700
Insight Borrower Corporation						2,572
ArborWorks, LLC						2,534
IG Parent Corporation						2,500
IG Investor, LLC						2,400
Centre Technologies Holdings, LLC						2,400
CQ Fluency, LLC						2,250
Titan Meter Midco Corp.						2,159
Batjer TopCo, LLC						2,070
Bluestem Brands, Inc.						2,044
Garyline, LLC						2,002
The Affiliati Network, LLC						2,000
Coregistics Buyer LLC						1,908
Channel Partners Intermediateco, LLC						1,864
Victory Energy Operations, LLC						1,723
Mills Fleet Farm Group, LLC						1,672
Pinnacle TopCo, LLC						1,600
Colonial Electric Company LLC						1,600
Trantech Radiator Topco, LLC						1,600
Chamberlin Holding LLC						1,600
BDB Holdings, LLC						1,380
American Health Staffing Group, Inc.						1,333
Escalent, Inc.						1,326
Implus Footcare, LLC						1,272
Clad-Rex Steel, LLC						1,200
B-O-F Corporation						1,161
KMS, LLC						1,086
SPAU Holdings, LLC						1,086
ATS Operating, LLC						1,080

107

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)


RFG AcquireCo, LLC	1,000
RA Outdoors LLC	917
Bond Brand Loyalty ULC	856
Orttech Holdings, LLC	800
Mystic Logistics Holdings, LLC	800
Barfly Ventures, LLC	760
Burning Glass Intermediate Holding Company, Inc.	639
Jensen Jewelers of Idaho, LLC	500
Wash & Wax Systems LLC	473
Cody Pools, Inc.	443
Mini Melts of America, LLC	414
Island Pump and Tank, LLC	274
Roof Opco, LLC	233
GRT Rubber Technologies LLC	204
GULF PACIFIC ACQUISITION, LLC	151
Obra Capital, Inc.	148
AAC Holdings, Inc.	50
HDC/HW Intermediate Holdings	45
Invincible Boat Company, LLC.	42

Total Loan Commitments	$	278,633

Total Commitments	$	307,546

___________________________

(1)This table excludes commitments related to five additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses. The Company does not expect any material future capital to be called on its commitment to these investments and as a result has excluded those commitments from this table.

(2)This table excludes commitments related to five additional Other Portfolio investments for which the investment period has expired and remaining commitments may only be drawn to pay fund expenses or for follow-on investments in existing portfolio companies. The Company does not expect any material future capital to be called on its commitment to these investments to pay fund expenses, and based on representations from the fund manager, the Company does not expect any further capital will be called on its commitment for follow-on investments. As a result, the Company has excluded those commitments from this table.

Main Street will fund its unfunded commitments from the same sources it uses to fund its investment commitments that are funded at the time they are made (which are typically through existing cash and cash equivalents and borrowings under the Credit Facilities). Main Street follows a process to manage its liquidity and ensure that it has available capital to fund its unfunded commitments as necessary. The Company had no unrealized appreciation or depreciation on the outstanding unfunded commitments as of June 30, 2025.

Main Street may, from time to time, be involved in litigation arising out of its operations in the normal course of business or otherwise. Furthermore, third parties may seek to impose liability on Main Street in connection with the activities of its portfolio companies. While the outcome of any current legal proceedings cannot at this time be predicted with certainty, Main Street does not expect any current matters will materially affect its financial condition or results of operations; however, there can be no assurance whether any pending or future legal proceedings will have a material adverse effect on Main Street’s financial condition or results of operations in any future reporting period.

108

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

NOTE L — RELATED PARTY TRANSACTIONS

As discussed further in Note D — External Investment Manager, the External Investment Manager is treated as a wholly-owned portfolio company of Main Street and is included as part of Main Street’s Investment Portfolio. As of June 30, 2025, Main Street had a receivable of $10.7 million due from the External Investment Manager, which included (i) $7.8 million related primarily to operating expenses incurred by Main Street as required to support the External Investment Manager’s business and amounts due from the External Investment Manager to Main Street under a tax sharing agreement (see further discussion in Note D — External Investment Manager) and (ii) $2.8 million of dividends declared but not paid by the External Investment Manager. MSCC has entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for the External Investment Manager’s relationship with MSC Income and its other clients (see further discussion in Note A.1. — Organization and Basis of Presentation — Organization and Note D — External Investment Manager).

From time to time, Main Street may make investments in clients of the External Investment Manager in the form of debt or equity capital on terms approved by Main Street’s Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act.

Following the closing of the MSC Income’s follow-on public offering, Main Street entered into a share purchase plan to purchase up to $20.0 million in the aggregate of shares of MSC Income common stock in the open market for a twelve-month period beginning in March 2025, at times when the market price per share of MSC Income common stock is trading below the most recently reported NAV per share of MSC Income’s common stock by certain pre-determined levels (including any updates, corrections or adjustments publicly announced by MSC Income to any previously announced NAV per share). The purchases of shares of MSC Income common stock pursuant to the share purchase plan are intended to satisfy the conditions of Rule 10b5-1 and Rule 10b-18 under the Exchange Act and will otherwise be subject to applicable law, including Regulation M, which may prohibit purchases under certain circumstances. MSC Income also entered into a share repurchase plan to purchase up to $65.0 million in the aggregate of its common stock in the open market with terms and conditions substantially similar to Main Street’s share purchase plan for shares of MSC Income common stock, and daily purchases under the two plans, if any, are expected to be split pro rata (or as close thereto as reasonably possible) between Main Street and MSC Income based on the respective plan sizes. In connection with Main Street’s potential acquisition in excess of 3% of MSC Income’s outstanding shares of common stock as a result of any purchases pursuant to Main Street’s share purchase plan for shares of MSC Income common stock or otherwise, Main Street entered into a Fund of Funds Investment Agreement with MSC Income. The Fund of Funds Investment Agreement provides for the acquisition by Main Street of MSC Income’s shares of common stock, and MSC Income’s sale of such shares to Main Street, in a manner consistent with the requirements of Rule 12d1-4 under the 1940 Act.

The following table summarizes Main Street’s purchases of MSC Income’s common stock for the three months ended June 30, 2025 pursuant to the share purchase plan.


Period	Total number of shares purchased	Average price paid per share (1)		Total number of shares purchased as part of publicly announced plans or programs	Approximate dollar value of shares that may yet be purchased under the plans or programs
	(in thousands, except shares and per share amounts)
April 1 through April 30, 2025	3,054	$	14.59	3,054	$	19,955
May 1 through May 31, 2025	26	14.97		26	19,955
June 1 through June 30, 2025	—	—		—	19,955

___________________________

(1)Includes broker commissions.

109

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

As of June 30, 2025, Main Street owned 1,377,952 shares of MSC Income’s common stock. Each of Main Street’s purchases of MSC Income common stock was unanimously approved by the Board of Directors and MSC Income’s board of directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act, of each board. In addition, certain of Main Street’s officers and employees own shares of MSC Income and therefore have direct pecuniary interests in MSC Income.

In December 2020, the External Investment Manager entered into an investment management agreement with Private Loan Fund I to provide investment advisory and management services in exchange for an asset-based fee and certain incentive fees. Private Loan Fund I is a private investment fund exempt from registration under the 1940 Act that co-invests with Main Street in Main Street’s Private Loan investment strategy. In connection with Private Loan Fund I’s initial closing in December 2020, Main Street committed to contribute up to $10.0 million as a limited partner and is entitled to distributions on such interest. In February 2022, Main Street increased its total commitment to Private Loan Fund I from $10.0 million to $15.0 million. In addition, certain of Main Street’s officers and employees (and certain of their immediate family members) have made capital commitments to Private Loan Fund I as limited partners and therefore have direct pecuniary interests in Private Loan Fund I. As of June 30, 2025, Main Street has funded $14.2 million of its limited partner commitment and Main Street’s unfunded commitment was $0.8 million. Main Street’s limited partner commitment to Private Loan Fund I was unanimously approved by the Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act.

In March 2022, Main Street provided Private Loan Fund I with a revolving line of credit pursuant to a Secured Revolving Promissory Note, dated March 17, 2022 (as amended, the “PL Fund 2022 Note”), which provides for borrowings up to $15.0 million. Borrowings under the PL Fund 2022 Note bear interest at a rate of SOFR plus 3.0%, subject to a 2.0% SOFR floor, can be advanced through March 2026 and mature in March 2027. Available borrowings under the PL Fund 2022 Note are subject to a 0.25% non-use fee. The borrowings are collateralized by all assets of Private Loan Fund I (other than the assets of its special purpose vehicle financing subsidiary). The PL Fund 2022 Note was unanimously approved by Main Street’s Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. As of June 30, 2025, there were $4.0 million of borrowings outstanding under the PL Fund 2022 Note.

In September 2023, the External Investment Manager entered into an investment management agreement with Private Loan Fund II to provide investment advisory and management services in exchange for an asset-based fee and certain incentive fees. Private Loan Fund II is a private investment fund exempt from registration under the 1940 Act that co-invests with Main Street in Main Street’s Private Loan investment strategy. In connection with Private Loan Fund II’s initial closing in September 2023, Main Street committed to contribute up to $15.0 million (limited to 20% of total commitments) as a limited partner and is entitled to distributions on such interest. In addition, certain of Main Street’s officers and employees (and certain of their immediate family members) have made capital commitments to Private Loan Fund II as limited partners and therefore have direct pecuniary interests in Private Loan Fund II. As of June 30, 2025, Main Street has funded $9.0 million of its limited partner commitment and Main Street’s unfunded commitment was $6.0 million. Main Street’s limited partner commitment to Private Loan Fund II was unanimously approved by the Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act.

In September 2023, Main Street provided Private Loan Fund II with a revolving line of credit pursuant to a Secured Revolving Promissory Note, dated September 5, 2023 (as amended, the “PL Fund II 2023 Note”), which provided for borrowings up to $50.0 million. Borrowings under the PL Fund II 2023 Note bore interest at a rate of SOFR plus 3.5%, subject to a 2.0% SOFR floor, and was scheduled to mature on September 5, 2025. Available borrowings under the PL Fund II 2023 Note were subject to a 0.25% non-use fee. The borrowings were collateralized by all assets of Private Loan Fund II. The PL Fund II 2023 Note was unanimously approved by Main Street’s Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. In November 2024, Private Loan Fund II fully repaid all borrowings outstanding under the PL Fund II 2023 Note and the PL Fund II 2023 Note was extinguished.

110

Table of contents

MAIN STREET CAPITAL CORPORATION

Notes to the Consolidated Financial Statements (Continued)

(Unaudited)

In November 2024, Main Street provided Private Loan Fund II with a revolving line of credit pursuant to a Secured Revolving Promissory Note, dated November 22, 2024 (the “PL Fund II 2024 Note”), which provides for borrowings up to $10.0 million. Borrowings under the PL Fund II 2024 Note bear interest at a rate of SOFR plus 3.0%, subject to a 2.0% SOFR floor, and mature on the date upon which Private Loan Fund II’s investment period concludes, which is scheduled to occur in June 2029. Available borrowings under the PL Fund II 2024 Note are subject to a 0.25% non-use fee. The borrowings are collateralized by all assets of Private Loan Fund II (other than the assets of its special purpose vehicle financing subsidiary). The PL Fund II 2024 Note was unanimously approved by Main Street’s Board of Directors, including each director who is not an “interested person,” as such term is defined in Section 2(a)(19) of the 1940 Act. As of June 30, 2025, there were no borrowings outstanding under the PL Fund II 2024 Note.

As described in Note B.9. — Summary of Significant Accounting Policies — Deferred Compensation Plan, participants in the Deferred Compensation Plan elect one or more investment options, including phantom Main Street stock units, interests in affiliated funds and various mutual funds, where their deferred amounts are notionally invested pending distribution pursuant to participant elections and plan terms. As of June 30, 2025, $30.1 million of directors’ fees and employee compensation, plus net unrealized gains and losses and investment income, and minus previous distributions, was deferred under the Deferred Compensation Plan. As of June 30, 2025, $11.4 million was deferred into phantom Main Street stock units, representing 193,549 shares of Main Street’s common stock. In addition, as of June 30, 2025, the Company had $18.7 million of funded investments from deferred compensation in trust, including $2.1 million in Private Loan Fund I and $4.5 million in Private Loan Fund II.

NOTE M — SUBSEQUENT EVENTS

The Company’s management has evaluated subsequent events through the date of issuance of the consolidated financial statements, and identified the following to report:

In August 2025, Main Street declared a supplemental dividend of $0.30 per share payable in September 2025. This supplemental dividend is in addition to the previously announced regular monthly dividends that Main Street declared of $0.255 per share for each month of July, August and September 2025, or total regular monthly dividends of $0.765 per share for the third quarter of 2025, resulting in total dividends declared for the third quarter of 2025 of $1.065 per share.

In August 2025, Main Street also declared regular monthly dividends of $0.255 per share for each month of October, November and December of 2025. These regular monthly dividends equal a total of $0.765 per share for the fourth quarter of 2025, representing a 4.1% increase from the regular monthly dividends paid in the fourth quarter of 2024. Including the regular monthly and supplemental dividends declared for the third and fourth quarters of 2025, Main Street will have paid $46.855 per share in cumulative dividends since its October 2007 initial public offering.

111


Table of contents			Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates

June 30, 2025

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)		Amount of Unrealized Gain/(Loss)		Amount of Interest, Fees or Dividends Credited to Income (2)		December 31, 2024 Fair Value (13)		Gross Additions (3)		Gross Reductions (4)		June 30, 2025 Fair Value (13)
Majority-Owned Investments
Analytical Systems Keco Holdings, LLC					Secured Debt	(8)	$	—	$	—	$	—	$	—	$	—	$	—	$	—
	17.50%				Secured Debt	(8)	—		—		360		4,048		6		100		3,954
					Preferred Member Units	(8)	—		—		—		—		—		—		—
					Preferred Member Units	(8)	—		40		—		5,300		40		—		5,340
					Warrants	(8)	—		—		—		—		—		—		—
BDB Holdings, LLC					Preferred Equity	(7)	—		(1,060)		—		18,920		—		1,060		17,860
	12.00%				Secured Debt (12)	(7)	—		—		17		—		420		—		420
Brewer Crane Holdings, LLC	14.48%	SF+	10.00%		Secured Debt	(9)	—		—		364		5,016		—		—		5,016
					Preferred Member Units	(9)	—		(1,420)		60		4,680		—		1,420		3,260
Café Brazil, LLC					Member Units	(8)	—		(190)		34		1,200		—		190		1,010
California Splendor Holdings LLC	14.00%				Secured Debt	(9)	—		388		1,933		28,465		593		3,292		25,766
					Secured Debt (12)	(9)	—		—		44		1,506		18		1,540		(16)
					Preferred Member Units	(9)	—		(6,940)		125		22,215		—		6,940		15,275
	15.00%			15.00%	Preferred Member Units	(9)	—		—		823		10,909		823		—		11,732
Clad-Rex Steel, LLC					Secured Debt (12)	(5)	—		—		1		—		—		—		—
	9.00%				Secured Debt	(5)	—		(5)		312		6,760		5		485		6,280
	10.00%				Secured Debt	(5)	—		—		48		973		—		22		951
					Member Units	(5)	—		1,300		811		10,990		1,300		—		12,290
					Member Units	(5)	—		320		—		950		320		—		1,270
Cody Pools, Inc.	12.50%				Secured Debt (12)	(8)	—		(3)		119		—		4,197		425		3,772
	12.50%				Secured Debt	(8)	—		(6)		2,375		39,227		7		2,154		37,080
					Preferred Member Units	(8)	—		(660)		1,344		67,810		—		660		67,150
CompareNetworks Topco, LLC	13.48%	SF+	9.00%		Secured Debt	(9)	—		—		204		2,903		11		210		2,704
					Preferred Member Units	(9)	—		(1,630)		—		11,260		—		1,630		9,630
Cybermedia Technologies, LLC					Secured Debt	(6)	—		—		5		—		—		—		—
	13.00%				Secured Debt	(6)	—		(592)		1,810		27,116		28		681		26,463
					Preferred Member Units	(6)	—		(15,000)		125		15,000		—		15,000		—
					Preferred Equity	(6)	—		1,000		—		—		3,500		100		3,400
Datacom, LLC	7.50%				Secured Debt	(8)	—		—		36		493		721		540		674
	10.00%				Secured Debt	(8)	—		(689)		471		7,947		68		823		7,192
					Preferred Member Units	(8)	—		(600)		—		240		360		600		—
Direct Marketing Solutions, Inc.					Secured Debt	(9)	—		(14)		23		—		14		14		—
	14.00%				Secured Debt	(9)	—		(20)		1,669		23,902		20		840		23,082
					Preferred Stock	(9)	—		540		—		17,930		540		—		18,470
Gamber-Johnson Holdings, LLC		SF+	7.50%		Secured Debt (12)	(5)	—		—		3		—		—		—		—
	11.50%	SF+	7.50%		Secured Debt (12)	(5)	—		(25)		4,252		73,126		25		825		72,326
					Member Units	(5)	—		—		3,484		114,750		—		—		114,750
Garreco, LLC					Member Units	(8)	—		(230)		39		2,060		—		230		1,830
GRT Rubber Technologies LLC	10.48%	SF+	6.00%		Secured Debt (12)	(8)	—		(2)		167		3,146		2		2		3,146
	12.48%	SF+	8.00%		Secured Debt	(8)	—		(23)		2,561		40,493		23		23		40,493
					Member Units	(8)	—		930		3,128		45,890		930		—		46,820
Gulf Publishing Holdings, LLC		SF+	9.50%		Secured Debt	(8)	—		—		—		—		—		—		—
	12.50%				Secured Debt	(8)	—		467		—		1,518		360		—		1,878

112


Table of contents			Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2024 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2025 Fair Value (13)
					Preferred Equity	(8)	—	—	—	—	—	—	—
					Member Units	(8)	—	—	—	—	—	—	—
IG Investor, LLC	13.00%				Secured Debt (12)	(6)	—	24	115	1,572	28	—	1,600
	13.00%				Secured Debt	(6)	—	209	2,330	35,257	247	440	35,064
					Common Equity	(6)	—	3,330	—	16,230	3,330	—	19,560
Jensen Jewelers of Idaho, LLC		P+	6.75%		Secured Debt (12)	(9)	—	—	—	—	—	—	—
	14.25%	P+	6.75%		Secured Debt	(9)	—	—	102	1,498	—	320	1,178
					Member Units	(9)	—	(280)	544	11,820	—	280	11,540
MSC Adviser I, LLC					Member Units	(8)	—	26,600	5,342	246,000	26,600	—	272,600
Mystic Logistics Holdings, LLC					Secured Debt (12)	(6)	—	—	2	—	—	—	—
	10.00%				Secured Debt	(6)	—	(4)	292	5,746	4	4	5,746
					Common Stock	(6)	—	410	1,972	26,370	410	—	26,780
NRP Jones, LLC	12.00%				Secured Debt	(5)	—	—	137	2,178	6	—	2,184
					Member Units	(5)	—	(1,601)	—	2,696	—	1,601	1,095
					Member Units	(5)	—	(49)	—	94	—	49	45
					Preferred Equity	(5)	—	756	—	—	1,238	—	1,238
					Common Equity	(5)	—	—	—	—	1,200	—	1,200
OMi Topco, LLC					Secured Debt	(8)	—	(30)	207	9,000	—	9,000	—
					Secured Debt	(8)	—	—	434	—	—	—	—
	12.00%				Secured Debt	(8)	—	44	146	—	19,000	—	19,000
					Preferred Member Units	(8)	—	4,900	14,093	72,720	4,900	—	77,620
PPL RVs, Inc.		SF+	7.00%		Secured Debt	(8)	—	(1)	1	—	1	1	—
	11.48%	SF+	7.00%		Secured Debt	(8)	—	(26)	946	16,456	26	1,154	15,328
					Common Stock	(8)	—	1,140	261	17,110	1,140	—	18,250
					Common Stock	(8)	—	61	—	514	61	—	575
Principle Environmental, LLC	13.00%				Secured Debt	(8)	—	—	330	4,861	9	—	4,870
					Preferred Member Units	(8)	—	1,190	654	12,600	1,190	—	13,790
					Common Stock	(8)	—	60	—	600	60	—	660
Quality Lease Service, LLC					Member Units	(7)	—	—	—	460	—	—	460
Robbins Bros. Jewelry, Inc.				10.00%	Secured Debt	(9)	—	—	—	(39)	—	12	(51)
	12.50%			10.00%	Secured Debt	(9)	—	—	—	14,562	—	427	14,135
					Preferred Equity	(9)	—	—	—	—	—	—	—
Trantech Radiator Topco, LLC					Secured Debt (12)	(7)	—	—	2	(1)	—	—	(1)
	13.50%				Secured Debt	(7)	—	—	551	7,855	14	—	7,869
					Common Stock	(7)	—	890	58	8,570	890	—	9,460
Victory Energy Operations, LLC	13.00%				Secured Debt (12)	(8)	—	—	68	(33)	1,727	—	1,694
	13.00%				Secured Debt	(8)	—	—	3,202	47,792	49	—	47,841
					Preferred Equity	(8)	—	—	232	22,686	—	215	22,471
Volusion, LLC	10.00%				Secured Debt	(8)	—	—	106	2,100	—	—	2,100
					Preferred Member Units	(8)	—	—	—	—	—	—	—
					Preferred Member Units	(8)	22	(1,627)	—	7,003	22	2,745	4,280
					Preferred Member Units	(8)	—	—	—	—	—	—	—
					Common Stock	(8)	—	—	—	—	—	—	—
Ziegler’s NYPD, LLC	12.00%				Secured Debt	(8)	—	—	107	1,750	—	—	1,750

113


Table of contents			Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2024 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2025 Fair Value (13)
					Preferred Member Units	(8)	—	(270)	—	320	—	270	50
					Warrants	(8)	—	—	—	—	—	—	—
Other Controlled Investments
2717 MH, L.P.					LP Interests (2717 MH, L.P.)	(8)	5,466	(4,945)	—	8,818	4,046	11,178	1,686
					LP Interests (2717 HPP-MS, L.P.)	(8)	—	64	—	383	64	—	447
					LP Interests (2717 GRE-LP, L.P.)	(8)	—	—	—	441	—	—	441
HPEP 423 COR, LP					LP Interests (423 COR, L.P.)	(8)	—	981	—	4,187	981	—	5,168
American Nuts, LLC					Preferred Equity	(9)	—	(1,180)	—	—	8,970	1,180	7,790
	12.95%	SF+	8.50%	12.95%	Secured Debt	(9)	—	—	253	—	7,653	—	7,653
	12.95%	SF+	8.50%	12.95%	Secured Debt	(9)	—	—	253	—	7,653	—	7,653
ASC Interests, LLC	13.00%				Secured Debt	(8)	—	—	27	400	—	—	400
	13.00%				Secured Debt	(8)	—	(98)	105	1,598	—	170	1,428
					Preferred Member Units	(8)	—	—	—	—	—	—	—
					Member Units	(8)	—	—	—	—	—	—	—
ATS Workholding, LLC	5.00%				Secured Debt	(9)	(1,897)	2,261	—	113	2,324	2,437	—
	5.00%				Secured Debt	(9)	(2,842)	2,698	—	143	2,698	2,841	—
					Preferred Member Units	(9)	(3,725)	3,726	—	—	3,726	3,726	—
Barfly Ventures, LLC	7.00%				Secured Debt (12)	(5)	—	—	24	711	—	—	711
					Member Units	(5)	—	950	1,103	5,860	950	—	6,810
Batjer TopCo, LLC					Secured Debt (12)	(8)	—	—	12	446	1	450	(3)
	10.00%				Secured Debt (12)	(8)	—	—	14	270	—	—	270
	10.00%				Secured Debt	(8)	—	—	569	10,529	11	—	10,540
					Preferred Stock	(8)	—	1,820	350	5,160	1,820	—	6,980
Bolder Panther Group, LLC	11.67%	SF+	7.29%		Secured Debt	(9)	—	(69)	6,000	101,643	68	665	101,046
	8.00%				Class B Preferred Member Units	(9)	—	(220)	1,187	30,520	—	220	30,300
					Secured Debt	(9)	—	—	76	—	—	—	—
Bridge Capital Solutions Corporation					Preferred Member Units	(6)	—	—	—	—	—	—	—
					Warrants	(6)	—	—	—	—	—	—	—
					Warrants	(6)	—	—	—	—	—	—	—
CBT Nuggets, LLC					Member Units	(9)	—	(580)	1,235	49,540	—	580	48,960
Centre Technologies Holdings, LLC		SF+	10.00%		Secured Debt (12)	(8)	—	—	6	—	—	—	—
	14.48%	SF+	10.00%		Secured Debt	(8)	—	(8)	1,775	25,534	8	1,078	24,464
					Preferred Member Units	(8)	—	4,140	60	12,410	4,140	—	16,550
Chamberlin Holding LLC		SF+	6.00%		Secured Debt (12)	(8)	—	(45)	49	—	45	45	—
	12.49%	SF+	8.00%		Secured Debt	(8)	—	4	1,064	15,620	3,200	—	18,820
					Member Units	(8)	—	(820)	4,758	33,110	—	820	32,290
					Member Units	(8)	—	140	46	3,550	140	—	3,690
Charps, LLC	14.00%				Unsecured Debt	(5)	—	(49)	444	5,694	50	50	5,694
					Preferred Member Units	(5)	—	(220)	536	15,580	—	220	15,360
Colonial Electric Company LLC					Secured Debt (12)	(6)	—	—	4	—	—	—	—

114


Table of contents			Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2024 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2025 Fair Value (13)
	12.00%				Secured Debt	(6)	—	(19)	833	14,310	19	2,835	11,494
					Preferred Member Units	(6)	—	1,700	1,871	13,570	1,700	—	15,270
Compass Systems & Sales, LLC					Secured Debt	(5)	—	—	3	(21)	3	—	(18)
	13.50%				Secured Debt	(5)	—	(139)	1,184	17,067	17	140	16,944
					Preferred Equity	(5)	—	4	120	7,450	4	—	7,454
Copper Trail Fund Investments					LP Interests (CTMH, LP)	(9)	—	—	—	500	15	—	515
Digital Products Holdings LLC	14.38%	SF+	10.00%		Secured Debt	(5)	—	—	898	12,422	23	660	11,785
					Preferred Member Units	(5)	—	—	100	9,835	—	—	9,835
Doral Holdings, LLC					Preffered Equity	(5)	—	—	—	—	13,000	—	13,000
					Secured Debt	(5)	—	—	—	—	—	—	—
	13.00%				Secured Debt	(5)	—	—	1,047	—	29,215	—	29,215
Elgin AcquireCo, LLC		SF+	6.00%		Secured Debt	(5)	—	—	5	(5)	1	—	(4)
	12.00%				Secured Debt	(5)	—	—	1,099	17,969	20	492	17,497
	9.00%				Secured Debt	(5)	—	—	283	6,207	1	26	6,182
					Common Stock	(5)	—	(570)	—	5,730	—	570	5,160
					Common Stock	(5)	—	110	—	3,050	110	—	3,160
Flame King Holdings, LLC					Preferred Equity	(9)	—	5,450	6,952	35,920	5,450	—	41,370
	12.00%				Secured Debt	(9)	—	—	671	—	65,351	—	65,351
Harrison Hydra-Gen, Ltd.					Common Stock	(8)	—	260	—	7,010	260	—	7,270
JorVet Holdings, LLC	12.00%				Secured Debt	(9)	—	—	1,430	23,216	24	—	23,240
					Preferred Equity	(9)	—	300	539	13,180	300	—	13,480
KBK Industries, LLC					Secured Debt	(5)	—	(24)	130	3,700	—	3,700	—
					Member Units	(5)	—	—	2,333	25,180	—	—	25,180
	9.50%				Secured Debt	(5)	—	51	156	—	9,400	700	8,700
Kickhaefer Manufacturing Company, LLC	12.00%				Secured Debt	(5)	—	—	836	14,987	4	1,600	13,391
	9.00%				Secured Debt	(5)	—	—	178	3,926	1	24	3,903
					Preferred Equity	(5)	—	2,040	—	12,240	2,040	—	14,280
					Member Units	(5)	—	—	59	2,710	—	—	2,710
Metalforming Holdings, LLC					Secured Debt (12)	(7)	—	4	12	(11)	11	—	—
	9.75%				Secured Debt	(7)	—	85	977	20,844	117	2,397	18,564
	8.00%			8.00%	Preferred Equity	(7)	—	(360)	604	6,397	—	362	6,035
					Common Stock	(7)	—	(90)	748	6,850	—	90	6,760
MS Private Loan Fund I, LP	5.00%	SF+	3.00%		Secured Debt (12)	(8)	—	—	200	1,600	10,100	7,700	4,000
					LP Interests (12)	(8)	—	(508)	878	14,034	—	508	13,526
MS Private Loan Fund II, LP		SF+	3.00%		Secured Debt (12)	(8)	—	—	37	(59)	1,612	1,650	(97)
					LP Interests (12)	(8)	—	—	490	7,843	1,551	—	9,394
MSC Income Fund, Inc.					Common Equity	(8)	—	202	991	16,810	4,747	—	21,557
MVI MSO, LLC (Milford Vascular)	13.00%				Secured Debt	(6)	—	—	541	—	9,758	—	9,758
					Preferred Equity	(6)	—	—	—	—	2,700	—	2,700
NAPCO Precast, LLC					Member Units	(8)	—	2,770	275	9,050	2,770	—	11,820
Nello Industries Investco, LLC		SF+	6.50%		Secured Debt	(5)	—	—	16	(16)	16	—	—
	13.50%				Secured Debt	(5)	—	—	1,874	26,959	27	—	26,986
					Preferred Equity	(5)	—	2,680	398	15,560	2,680	—	18,240
NexRev LLC					Secured Debt	(8)	—	—	—	—	—	—	—

115


Table of contents			Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)		Amount of Unrealized Gain/(Loss)		Amount of Interest, Fees or Dividends Credited to Income (2)		December 31, 2024 Fair Value (13)		Gross Additions (3)		Gross Reductions (4)		June 30, 2025 Fair Value (13)
					Secured Debt	(8)	—		(9)		151		9,811		9		9,820		—
					Preferred Member Units	(8)	—		480		433		11,910		480		—		12,390
NuStep, LLC	10.98%	SF+	6.50%		Secured Debt	(5)	—		—		201		3,600		—		1,200		2,400
	12.00%				Secured Debt	(5)	—		—		1,114		18,439		1		—		18,440
					Preferred Member Units	(5)	—		650		—		11,550		650		—		12,200
					Preferred Member Units	(5)	—		—		—		6,000		—		—		6,000
Orttech Holdings, LLC		SF+	11.00%		Secured Debt (12)	(5)	—		—		—		—		—		—		—
	15.48%	SF+	11.00%		Secured Debt	(5)	—		(24)		1,700		21,960		24		824		21,160
					Preferred Stock	(5)	—		—		120		13,450		—		—		13,450
Pinnacle TopCo, LLC					Secured Debt (12)	(8)	—		(2)		6		—		2		2		—
	13.00%				Secured Debt	(8)	—		(34)		1,888		28,640		34		834		27,840
					Preferred Equity	(8)	—		1,170		1,019		18,360		1,170		—		19,530
River Aggregates, LLC					Member Units	(8)	—		60		—		9,530		60		—		9,590
Tedder Industries, LLC	12.00%			12.00%	Secured Debt	(9)	—		(3)		—		1,646		—		2		1,644
	12.00%			12.00%	Secured Debt	(9)	—		(150)		—		3,603		—		151		3,452
					Preferred Member Units	(9)	—		—		—		—		—		—		—
					Preferred Member Units	(9)	—		—		—		—		—		—		—
					Preferred Member Units	(9)	—		—		—		—		—		—		—
Televerde, LLC					Member Units	(8)	—		769		298		4,252		769		—		5,021
					Preferred Stock	(8)	—		—		—		1,794		—		—		1,794
VVS Holdco LLC		SF+	6.00%		Secured Debt (12)	(5)	—		—		8		—		—		—		—
	11.50%				Secured Debt	(5)	—		—		1,491		25,661		30		1,281		24,410
					Preferred Equity	(5)	—		—		99		12,240		—		—		12,240


Other
Amounts related to investments transferred to or from other 1940 Act classification during the period							—		(3,450)		227		(35,920)		—		—		—
Total Control investments							$	(2,976)	$	33,555	$	116,454	$	2,087,890	$	291,307	$	119,552	$	2,295,565



Affiliate Investments
423 HAR, LP					LP Interests (423 HAR, L.P.)	(8)	$	—	$	—	$	—	$	1,226	$	—	$	—	$	1,226
AAC Holdings, Inc.	18.00%			18.00%	Secured Debt	(7)	(139)		3		—		609		—		609		—
	18.00%			18.00%	Secured Debt	(7)	(3,303)		80		—		17,365		—		17,365		—
					Preferred Equity	(7)	—		(360)		—		—		8,520		360		8,160
	10.00%			10.00%	Secured Debt	(7)	—		—		—		—		3,109		—		3,109
	12.00%			12.00%	Secured Debt	(7)	—		—		—		—		3,109		—		3,109
					Common Stock	(7)	—		—		—		—		—		—		—
					Warrants	(7)	—		—		—		—		—		—		—
	18.00%			18.00%	Secured Debt (12)	(7)	—		—		—		—		779		—		779
Boccella Precast Products LLC	10.00%				Secured Debt	(6)	—		55		15		266		55		65		256
					Member Units	(6)	—		1,180		254		310		1,180		—		1,490
Buca C, LLC	15.00%			15.00%	Secured Debt	(7)	—		—		—		—		—		—		—
	6.00%			6.00%	Preferred Member Units	(7)	—		—		—		—		—		—		—
	15.00%			15.00%	Secured Debt	(7)	—		—		—		—		—		—		—
	15.00%			15.00%	Secured Debt	(7)	—		(391)		—		—		391		391		—

116


Table of contents			Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2024 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2025 Fair Value (13)
Career Team Holdings, LLC		SF+	6.00%		Secured Debt (12)	(6)	—	—	95	887	—	936	(49)
	12.50%				Secured Debt	(6)	—	—	1,341	19,364	2,298	203	21,459
					Common Stock	(6)	—	(186)	—	4,740	666	186	5,220
Classic H&G Holdings, LLC					Preferred Member Units	(6)	—	(890)	—	2,850	—	890	1,960
Congruent Credit Opportunities Funds					LP Interests (Congruent Credit Opportunities Fund III, LP)	(8)	—	(78)	69	2,276	—	1,614	662
Connect Telecommunications Solutions Holdings, Inc.	13.00%				Secured Debt	(6)	—	—	1,801	27,315	46	2,160	25,201
					Preferred Equity	(6)	—	—	—	12,596	—	—	12,596
DMA Industries, LLC	12.00%				Secured Debt	(7)	—	—	1,022	16,722	8	—	16,730
					Preferred Equity	(7)	—	350	—	5,944	350	—	6,294
	12.00%				Secured Debt	(7)	—	—	34	555	1	—	556
	15.00%			15.00%	Preferred Equity	(7)	—	180	245	3,240	425	—	3,665
Dos Rios Partners					LP Interests (Dos Rios Partners, LP)	(8)	—	226	—	7,708	226	139	7,795
					LP Interests (Dos Rios Partners - A, LP)	(8)	—	72	—	2,447	72	44	2,475
Dos Rios Stone Products LLC					Class A Preferred Units	(8)	—	—	—	—	—	—	—
EIG Fund Investments					LP Interests (EIG Global Private Debt Fund-A, L.P.)	(8)	—	—	16	369	—	—	369
FCC Intermediate Holdco, LLC	13.00%				Secured Debt	(5)	—	3,191	2,603	29,109	3,691	820	31,980
					Warrants	(5)	—	3,790	570	10,840	3,790	—	14,630
Freeport Financial SBIC Fund LP					LP Interests (Freeport Financial SBIC Fund LP)	(5)	—	(347)	—	2,190	—	347	1,843
					LP Interests (Freeport First Lien Loan Fund III LP)	(5)	—	(82)	(23)	1,263	—	1,070	193
GFG Group, LLC					Secured Debt	(5)	—	(21)	185	8,185	—	8,185	—
					Preferred Member Units	(5)	—	(430)	582	10,540	—	430	10,110
	8.00%				Secured Debt	(5)	—	—	185	—	9,253	—	9,253
Gulf Manufacturing, LLC		SF+	7.63%		Secured Debt	(8)	—	(42)	18	—	5	42	(37)
	12.00%	SF+	7.63%		Secured Debt	(8)	—	(325)	2,352	39,000	46	1,325	37,721
					Member Units	(8)	—	(130)	354	14,730	—	130	14,600
					Common Stock	(8)	—	72	—	888	72	—	960
Hawk Ridge Systems, LLC	10.48%	SF+	6.00%		Secured Debt	(9)	—	—	173	2,645	3,245	3,400	2,490
	12.50%				Secured Debt	(9)	—	(27)	2,871	45,256	27	27	45,256
					Preferred Member Units	(9)	—	2,470	—	20,260	2,470	—	22,730
					Preferred Member Units	(9)	—	130	—	1,070	130	—	1,200
Houston Plating and Coatings, LLC	10.00%				Unsecured Convertible Debt	(8)	—	60	151	2,940	60	—	3,000
					Member Units	(8)	—	420	114	3,930	420	—	4,350
HPEP 3, L.P.					LP Interests (HPEP 3, L.P.) (12)	(8)	—	194	—	4,472	194	204	4,462
					LP Interests (HPEP 4, L.P.) (12)	(8)	—	425	—	5,861	1,302	—	7,163
Independent Pet Partners Intermediate Holdings, LLC					Common Equity	(6)	—	(630)	—	20,390	—	630	19,760

117


Table of contents			Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2024 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2025 Fair Value (13)
Infinity X1 Holdings, LLC					Secured Debt	(9)	—	(96)	683	15,050	—	15,050	—
					Preferred Equity	(9)	—	(530)	1,155	9,080	—	530	8,550
	12.00%				Secured Debt	(9)	—	14	339	—	16,372	—	16,372
Integral Energy Services	12.06%	SF+	7.50%		Secured Debt	(8)	—	(187)	839	12,728	29	829	11,928
	10.00%			10.00%	Preferred Equity	(8)	—	55	13	452	68	—	520
					Common Stock	(8)	—	140	—	550	140	—	690
	10.00%			10.00%	Preferred Equity	(8)	—	76	—	—	190	—	190
Iron-Main Investments, LLC	13.00%				Secured Debt	(5)	—	—	298	4,493	4	—	4,497
	13.00%				Secured Debt	(5)	—	—	194	2,927	2	—	2,929
	13.00%				Secured Debt	(5)	—	—	585	8,944	—	—	8,944
	13.00%				Secured Debt	(5)	—	—	1,165	17,542	14	—	17,556
	13.00%				Secured Debt	(5)	—	—	667	9,638	38	288	9,388
					Common Stock	(5)	—	(150)	—	2,850	—	150	2,700
	25.00%			25.00%	Preferred Equity	(5)	—	150	—	760	150	—	910
ITA Holdings Group, LLC	12.46%	SF+	8.00%		Secured Debt	(8)	—	(2)	79	1,180	2	2	1,180
		SF+	8.00%		Secured Debt	(8)	—	(12)	77	994	—	994	—
		SF+	7.00%		Secured Debt (12)	(5)	—	—	—	—	—	—	—
	11.46%	SF+	7.00%		Secured Debt	(8)	—	(133)	403	4,438	630	133	4,935
	13.46%	SF+	9.00%		Secured Debt	(8)	—	(133)	448	4,438	630	133	4,935
	11.46%	SF+	7.00%		Secured Debt	(8)	—	7	11	—	1,770	—	1,770
					Warrants	(8)	—	4,150	844	5,690	4,150	—	9,840
Johnson Downie Opco, LLC					Secured Debt (12)	(8)	—	(3)	12	—	3	3	—
	15.00%				Secured Debt	(8)	—	(25)	1,645	21,507	23	23	21,507
					Preferred Equity	(8)	—	4,220	1,397	14,550	4,220	—	18,770
KMS, LLC	14.50%	SF+	9.75%		Secured Debt	(5)	(415)	339	—	—	—	—	—
	14.50%	SF+	9.75%		Secured Debt	(5)	(3,037)	2,562	—	—	—	—	—
		SF+	9.75%	14.23%	Secured Debt	(5)	—	—	—	—	—	—	—
		SF+	9.75%	14.23%	Secured Debt	(5)	—	—	—	—	—	—	—
	14.23%	SF+	9.75%	14.23%	Secured Debt	(5)	—	—	—	—	—	—	—
	12.50%			12.50%	Secured Debt (12)	(5)	—	—	60	—	1,113	—	1,113
	12.50%			12.50%	Secured Debt	(5)	—	—	56	—	1,180	—	1,180
					Preferred Equity	(5)	—	—	—	—	4,890	—	4,890
Mills Fleet Farm Group, LLC	9.79%	SF+	5.50%	9.79%	Secured Debt (12)	(5)	—	—	114	—	2,763	—	2,763
					Preferred Equity	(5)	—	(1,516)	556	13,840	556	1,516	12,880
Moffitt Holdings, LLC	13.00%				Secured Debt	(8)	—	—	1,167	—	34,673	—	34,673
					Preferred Equity	(8)	—	—	—	—	14,300	—	14,300
MoneyThumb Acquisition, LLC	14.00%				Secured Debt	(9)	—	—	756	8,967	87	320	8,734
	12.00%			12.00%	Preferred Member Units	(9)	—	—	105	1,707	105	—	1,812
					Warrants	(9)	—	—	—	594	—	—	594
Nebraska Vet AcquireCo, LLC		SF+	7.00%		Secured Debt	(5)	—	(7)	10	—	7	7	—
					Preferred Member Units	(5)	55,647	(25,053)	5,695	32,040	55,647	87,687	—
					Secured Debt	(5)	—	(115)	3,143	62,200	115	62,315	—
					Secured Debt	(5)	—	(171)	193	4,650	2,771	7,421	—
OnAsset Intelligence, Inc.	12.00%			12.00%	Secured Debt	(8)	—	—	—	99	—	—	99

118


Table of contents			Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2024 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2025 Fair Value (13)
	12.00%			12.00%	Secured Debt	(8)	—	—	—	101	—	—	101
	12.00%			12.00%	Secured Debt	(8)	—	—	—	218	—	—	218
	12.00%			12.00%	Secured Debt	(8)	—	—	—	457	1	2	456
	10.00%			10.00%	Unsecured Debt	(8)	—	—	—	305	—	—	305
	7.00%			7.00%	Preferred Stock	(8)	—	—	—	—	—	—	—
					Common Stock	(8)	—	—	—	—	—	—	—
					Warrants	(8)	—	—	—	—	—	—	—
Oneliance, LLC					Preferred Stock	(7)	—	510	52	2,580	510	—	3,090
RA Outdoors (Aspira) LLC	11.25%	SF+	6.75%	11.25%	Secured Debt	(8)	—	(148)	80	1,257	42	150	1,149
	11.25%	SF+	6.75%	11.25%	Secured Debt	(8)	—	(1,553)	824	13,155	425	1,569	12,011
					Common Equity	(8)	—	—	—	—	—	—	—
RFG AcquireCo, LLC					Secured Debt (12)	(7)	—	—	1	—	—	10	(10)
					Secured Debt	(7)	—	—	—	—	—	—	—
	12.50%				Secured Debt	(7)	—	—	1,040	—	33,666	—	33,666
					Preferred Equity	(7)	—	—	—	—	11,401	—	11,401
SI East, LLC	11.85%				Secured Debt (12)	(7)	—	(2)	145	2,250	2	2	2,250
	12.79%				Secured Debt	(7)	—	48	4,368	67,661	—	—	67,661
					Preferred Member Units	(7)	—	(1,190)	—	13,660	—	1,190	12,470
Slick Innovations, LLC					Secured Debt	(6)	—	(140)	510	16,320	—	16,320	—
	14.00%				Secured Debt	(6)	—	265	1,371	—	25,880	320	25,560
					Common Stock	(6)	—	(450)	873	2,440	—	450	1,990
Student Resource Center, LLC	8.50%			8.50%	Secured Debt	(6)	—	(583)	—	1,644	—	583	1,061
					Preferred Equity	(6)	—	—	—	—	—	—	—
	8.50%			8.50%	Secured Debt	(6)	—	673	9	204	682	—	886
Superior Rigging & Erecting Co.					Preferred Member Units	(7)	—	5,420	—	10,530	5,420	—	15,950
The Affiliati Network, LLC					Secured Debt (12)	(9)	—	—	36	394	2,562	2,960	(4)
	13.00%				Secured Debt	(9)	—	51	307	5,053	57	—	5,110
					Preferred Stock	(9)	—	—	115	6,400	—	—	6,400
					Preferred Stock	(9)	—	—	—	287	26	—	313
UnionRock Energy Fund II, LP					LP Interests (12)	(9)	—	—	—	4,732	—	335	4,397
UnionRock Energy Fund III, LP					LP Interests (12)	(9)	—	(405)	—	5,612	447	887	5,172
UniTek Global Services, Inc.				15.00%	Secured Convertible Debt	(6)	3,762	(2,384)	41	5,642	505	6,147	—
				15.00%	Secured Convertible Debt	(6)	1,743	(1,155)	21	2,663	235	2,898	—
				20.00%	Preferred Stock	(6)	—	—	104	3,181	1,633	4,814	—
	20.00%			20.00%	Preferred Stock	(6)	—	(788)	—	4,272	5,116	—	9,388
	19.00%			19.00%	Preferred Stock	(6)	—	—	—	—	—	—	—
	13.50%			13.50%	Preferred Stock	(6)	—	—	—	—	—	—	—
					Common Stock	(6)	—	—	—	—	—	—	—
Urgent DSO LLC	13.50%				Secured Debt	(5)	—	—	606	8,727	8	—	8,735
	9.00%			9.00%	Preferred Equity	(5)	—	—	194	4,320	194	—	4,514
Wildcats Topco LLC (NVS Heritage)					Common Equity	(5)	—	—	—	—	22,427	—	22,427
World Micro Holdings, LLC	11.00%				Secured Debt	(7)	—	—	579	10,702	15	878	9,839
					Preferred Equity	(7)	—	—	198	3,845	—	—	3,845
Other

119


Table of contents			Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)		Amount of Unrealized Gain/(Loss)		Amount of Interest, Fees or Dividends Credited to Income (2)		December 31, 2024 Fair Value (13)		Gross Additions (3)		Gross Reductions (4)		June 30, 2025 Fair Value (13)
Amounts related to investments transferred to or from other 1940 Act classification during the period							3,453		550		291		35,920		—		—		—
Total Affiliate investments							$	57,711	$	(8,742)	$	49,501	$	846,798	$	303,836	$	258,488	$	856,226

___________________________

(1)The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the Consolidated Schedule of Investments included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

(2)Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it was in the category other than the one shown at period end is included in “Amounts related to investments transferred from other 1940 Act classifications during the period.”

(3)Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category.

(4)Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category.

(5)Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of June 30, 2025 for Control investments located in this region was $586,104. This represented 20.3% of net assets as of June 30, 2025. The fair value as of June 30, 2025 for Affiliate investments located in this region was $173,435. This represented 6.0% of net assets as of June 30, 2025.

(6)Portfolio company located in the Northeast region and Canada as determined by location of the corporate headquarters. The fair value as of June 30, 2025 for Control investments located in this region was $157,835. This represented 5.5% of net assets as of June 30, 2025. The fair value as of June 30, 2025 for Affiliate investments located in this region was $126,778. This represented 4.4% of net assets as of June 30, 2025.

(7)Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of June 30, 2025 for Control investments located in this region was $67,427. This represented 2.3% of net assets as of June 30, 2025. The fair value as of June 30, 2025 for Affiliate investments located in this region was $202,564. This represented 7.0% of net assets as of June 30, 2025.

(8)Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of June 30, 2025 for Control investments located in this region was $990,024. This represented 34.3% of net assets as of June 30, 2025. The fair value as of June 30, 2025 for Affiliate investments located in this region was $224,323. This represented 7.8% of net assets as of June 30, 2025.

120


Table of contents			Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2025

(dollars in thousands)

(Unaudited)

(9)Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of June 30, 2025 for Control investments located in this region was $494,175. This represented 17.1% of net assets as of June 30, 2025. The fair value as of June 30, 2025 for Affiliate investments located in this region was $129,126. This represented 4.5% of net assets as of June 30, 2025.

(10)All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted.

(11)This schedule should be read in conjunction with the Consolidated Schedule of Investments and Notes to the Consolidated Financial Statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q. Supplemental information can be located within the Consolidated Schedule of Investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs.

(12)Investment has an unfunded commitment as of June 30, 2025 (see Note K — Commitments and Contingencies). The fair value of the investment includes the impact of the fair value of any unfunded commitments.

(13)Negative fair value is the result of the capitalized discount being greater than the principal amount outstanding on the loan.

121

Table of contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates

June 30, 2024

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)		Amount of Unrealized Gain/(Loss)		Amount of Interest, Fees or Dividends Credited to Income (2)		December 31, 2023 Fair Value (13)		Gross Additions (3)		Gross Reductions (4)		June 30, 2024 Fair Value (13)
Majority-Owned Investments
Analytical Systems Keco Holdings, LLC	15.38%	SF+	10.00%		Secured Debt (12)	(8)	$	—	$	—	$	—	$	219	$	1	$	—	$	220
	15.38%	SF+	10.00%		Secured Debt	(8)	—		—		346		4,084		34		195		3,923
	14.13%				Preferred Member Units	(8)	—		—		—		—		—		—		—
					Preferred Member Units	(8)	—		760		—		4,860		760		—		5,620
					Warrants	(8)	—		—		—		—		—		—		—
Brewer Crane Holdings, LLC	15.48%	SF+	10.00%		Secured Debt	(9)	—		—		429		5,498		14		248		5,264
					Preferred Member Units	(9)	—		(320)		60		5,620		—		320		5,300
Café Brazil, LLC					Member Units	(8)	—		(189)		20		1,980		—		190		1,790
California Splendor Holdings LLC	14.00%			4.00%	Secured Debt	(9)	—		(79)		2,088		27,655		299		79		27,875
					Preferred Member Units	(9)	—		—		125		15,695		—		—		15,695
	15.00%			15.00%	Preferred Member Units	(9)	—		—		572		4,601		5,572		—		10,173
Clad-Rex Steel, LLC					Secured Debt (12)	(5)	—		—		1		—		—		—		—
	11.50%				Secured Debt	(5)	—		—		512		8,422		—		621		7,801
	10.00%				Secured Debt	(5)	—		—		51		1,004		—		19		985
					Member Units	(5)	—		1,010		422		5,200		1,010		—		6,210
					Member Units	(5)	—		(179)		—		1,129		—		179		950
Cody Pools, Inc.					Secured Debt (12)	(8)	—		4		31		—		1,264		1,264		—
	12.50%				Secured Debt	(8)	—		(6)		2,604		42,073		6		1,278		40,801
					Preferred Member Units	(8)	—		2,010		1,508		72,470		2,010		—		74,480
CompareNetworks Topco, LLC		SF+	9.00%		Secured Debt	(9)	—		—		—		—		—		—		—
	14.48%	SF+	9.00%		Secured Debt	(9)	—		—		247		3,454		—		357		3,097
					Preferred Member Units	(9)	—		(1,520)		—		14,450		—		1,520		12,930
Cybermedia Technologies, LLC					Secured Debt (12)	(6)	—		—		5		—		—		—		—
	13.00%				Secured Debt	(6)	—		—		1,881		28,389		35		975		27,449
					Preferred Member Units	(6)	—		1,020		1,041		15,000		1,020		—		16,020
Datacom, LLC	7.50%				Secured Debt	(8)	—		—		14		447		226		405		268
	10.00%				Secured Debt	(8)	—		—		491		7,587		73		135		7,525
					Preferred Member Units	(8)	—		130		—		70		130		—		200
Direct Marketing Solutions, Inc.					Secured Debt	(9)	—		(14)		48		1,233		1,289		2,522		—
	14.00%				Secured Debt	(9)	—		(23)		1,797		25,543		23		843		24,723
					Preferred Stock	(9)	—		(1,140)		—		20,740		—		1,140		19,600
Elgin AcquireCo, LLC		SF+	6.00%		Secured Debt (12)	(5)	—		—		4		(7)		1		—		(6)
	12.00%				Secured Debt	(5)	—		—		1,133		18,632		21		469		18,184
	9.00%				Secured Debt	(5)	—		—		285		6,252		2		24		6,230
					Common Stock	(5)	—		(360)		—		6,090		—		360		5,730
					Common Stock	(5)	—		80		—		1,670		80		—		1,750
Gamber-Johnson Holdings, LLC		SF+	7.50%		Secured Debt (12)	(5)	—		—		3		—		—		—		—
	10.50%	SF+	7.50%		Secured Debt	(5)	—		(61)		2,763		54,078		61		4,861		49,278
					Member Units	(5)	—		9,840		3,001		96,710		9,840		—		106,550
GRT Rubber Technologies LLC	11.48%	SF+	6.00%		Secured Debt (12)	(8)	—		2		163		2,400		746		—		3,146
	13.48%	SF+	8.00%		Secured Debt	(8)	—		(23)		2,782		40,493		23		23		40,493
					Member Units	(8)	—		—		84		44,440		—		—		44,440
Gulf Publishing Holdings, LLC		SF+	9.50%		Secured Debt (12)	(8)	—		—		—		—		—		—		—

122

Table of contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2024

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2023 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2024 Fair Value (13)
	12.50%			12.50%	Secured Debt	(8)	—	(336)	76	2,284	—	336	1,948
					Preferred Equity	(8)	—	(2,460)	—	2,460	—	2,460	—
					Member Units	(8)	—	—	—	—	—	—	—
IG Investor, LLC					Secured Debt (12)	(6)	—	—	14	(35)	4	—	(31)
	13.00%				Secured Debt	(6)	—	—	2,448	36,934	42	880	36,096
					Common Equity	(6)	—	—	—	14,400	—	—	14,400
Jensen Jewelers of Idaho, LLC		P+	6.75%		Secured Debt (12)	(9)	—	—	3	—	—	—	—
	15.00%	P+	6.75%		Secured Debt	(9)	—	—	149	1,998	—	198	1,800
					Member Units	(9)	—	(90)	769	12,420	—	90	12,330
Kickhaefer Manufacturing Company, LLC	12.00%				Secured Debt	(5)	—	—	1,174	19,774	8	2,400	17,382
	9.00%				Secured Debt	(5)	—	—	174	3,805	164	21	3,948
					Preferred Equity	(5)	—	2,240	—	9,690	2,240	—	11,930
					Member Units	(5)	—	(240)	65	2,730	—	240	2,490
Metalforming Holdings, LLC					Secured Debt (12)	(7)	—	—	5	—	—	—	—
	10.75%				Secured Debt	(7)	—	—	1,370	23,623	31	1,146	22,508
	8.00%			8.00%	Preferred Equity	(7)	—	236	—	6,035	236	119	6,152
					Common Stock	(7)	—	1,570	434	1,500	1,570	—	3,070
MH Corbin Holding LLC	14.00%				Secured Debt	(5)	—	—	369	5,022	—	160	4,862
					Preferred Member Units	(5)	—	—	—	330	—	—	330
					Preferred Member Units	(5)	—	—	—	—	—	—	—
MSC Adviser I, LLC					Member Units	(8)	—	12,497	6,312	174,063	12,497	—	186,560
Mystic Logistics Holdings, LLC					Secured Debt (12)	(6)	—	—	2	—	—	—	—
	10.00%				Secured Debt	(6)	—	18	292	5,746	—	—	5,746
					Common Stock	(6)	—	(290)	1,924	26,390	—	290	26,100
OMi Topco, LLC	12.00%				Secured Debt	(8)	—	(16)	766	12,750	16	766	12,000
					Preferred Member Units	(8)	—	11,900	2,475	36,380	11,900	—	48,280
PPL RVs, Inc.		SF+	8.75%		Secured Debt	(8)	—	(1)	1	—	1	1	—
	14.23%	SF+	8.75%		Secured Debt	(8)	—	(30)	1,438	19,877	30	886	19,021
					Common Stock	(8)	—	(1,110)	—	16,980	—	1,110	15,870
					Common Stock	(8)	—	146	—	368	146	—	514
Principle Environmental, LLC	13.00%				Secured Debt	(8)	—	—	399	5,829	12	—	5,841
					Preferred Member Units	(8)	—	50	491	10,750	50	—	10,800
					Common Stock	(8)	—	—	—	510	—	—	510
Quality Lease Service, LLC					Member Units	(7)	—	—	—	460	—	—	460
Robbins Bros. Jewelry, Inc.				10.00%	Secured Debt	(9)	—	—	8	(26)	2	—	(24)
	12.50%			10.00%	Secured Debt	(9)	—	(12,978)	1,083	30,798	19	13,429	17,388
					Preferred Equity	(9)	—	—	6	—	—	—	—
Trantech Radiator Topco, LLC					Secured Debt (12)	(7)	—	—	2	—	—	—	—
	13.50%				Secured Debt	(7)	—	71	529	7,920	—	—	7,920
					Common Stock	(7)	—	(2,970)	58	12,740	—	2,970	9,770
Volusion, LLC	10.00%				Secured Debt	(8)	—	—	106	2,100	—	—	2,100
					Preferred Member Units	(8)	—	—	—	—	—	—	—
					Preferred Member Units	(8)	—	1,867	—	7,250	1,868	2,118	7,000
					Preferred Member Units	(8)	—	—	—	—	—	—	—

123

Table of contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2024

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2023 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2024 Fair Value (13)
					Common Stock	(8)	—	—	—	—	—	—	—
Ziegler’s NYPD, LLC	12.00%				Secured Debt	(8)	—	—	27	450	—	—	450
	6.50%				Secured Debt	(8)	—	—	33	945	—	—	945
	14.00%				Secured Debt	(8)	—	(369)	195	2,080	—	370	1,710
					Preferred Member Units	(8)	—	—	—	—	—	—	—
					Warrants	(8)	—	—	—	—	—	—	—
Other Controlled Investments
2717 MH, L.P.					LP Interests (2717 MH, L.P.)	(8)	57	2,941	278	6,050	2,998	57	8,991
					LP Interests (2717 HPP-MS, L.P.)	(8)	—	60	—	315	59	—	374
					LP Interests (2717 GRE-LP, L.P.)	(8)	—	—	—	—	441	—	441
ASC Interests, LLC	13.00%				Secured Debt	(8)	—	—	27	400	—	—	400
	13.00%				Secured Debt	(8)	—	—	109	1,597	1	—	1,598
					Preferred Member Units	(8)	—	—	—	266	—	—	266
					Member Units	(8)	—	(60)	—	100	—	60	40
ATS Workholding, LLC	5.00%				Secured Debt	(9)	—	(281)	—	328	167	281	214
	5.00%				Secured Debt	(9)	—	(187)	—	473	—	188	285
					Preferred Member Units	(9)	—	—	—	—	—	—	—
Barfly Ventures, LLC	7.00%				Secured Debt (12)	(5)	—	—	26	711	—	—	711
					Member Units	(5)	—	580	—	4,140	580	—	4,720
Batjer TopCo, LLC	10.00%				Secured Debt (12)	(8)	—	(6)	18	—	451	6	445
	10.00%				Secured Debt (12)	(8)	—	—	14	270	—	—	270
	10.00%				Secured Debt	(8)	—	(67)	545	10,575	10	67	10,518
					Preferred Stock	(8)	—	(430)	407	6,150	—	430	5,720
Bolder Panther Group, LLC	13.43%	SF+	8.05%		Secured Debt	(9)	—	(27)	6,787	96,556	7,563	1,283	102,836
	8.00%				Class B Preferred Member Units	(9)	—	3,690	1,390	31,020	3,690	—	34,710
					Secured Debt	(9)	—	—	95	—	—	—	—
Bridge Capital Solutions Corporation	13.00%				Secured Debt	(6)	—	—	579	8,813	—	—	8,813
	13.00%				Secured Debt	(6)	—	—	66	1,000	—	—	1,000
					Preferred Member Units	(6)	—	—	50	1,000	—	—	1,000
					Warrants	(6)	—	(25)	—	1,808	—	25	1,783
					Warrants	(6)	—	(35)	—	2,482	—	35	2,447
CBT Nuggets, LLC					Member Units	(9)	—	(590)	1,235	50,130	—	590	49,540
Centre Technologies Holdings, LLC		SF+	10.00%		Secured Debt (12)	(8)	—	—	6	—	—	—	—
	15.48%	SF+	10.00%		Secured Debt	(8)	—	223	1,383	—	21,974	1,512	20,462
					Secured Debt	(8)	—	(62)	281	17,574	—	17,574	—
					Preferred Member Units	(8)	—	460	60	11,040	460	—	11,500
Chamberlin Holding LLC		SF+	6.00%		Secured Debt (12)	(8)	—	(45)	49	—	45	45	—
	13.49%	SF+	8.00%		Secured Debt	(8)	—	(1)	1,066	15,620	1	1	15,620
					Member Units	(8)	—	710	3,396	29,320	710	—	30,030
					Member Units	(8)	—	290	46	2,860	290	—	3,150

124

Table of contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2024

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2023 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2024 Fair Value (13)
Charps, LLC	10.00%				Unsecured Debt	(5)	—	(244)	528	5,694	244	244	5,694
					Preferred Member Units	(5)	—	(110)	155	15,690	—	110	15,580
Colonial Electric Company LLC					Secured Debt (12)	(6)	—	—	4	—	—	—	—
	12.00%				Secured Debt	(6)	—	385	1,246	21,627	423	3,910	18,140
					Preferred Member Units	(6)	—	(1,440)	1,440	2,400	—	2,400	—
					Preferred Member Units	(6)	—	4,060	556	7,680	4,060	—	11,740
Compass Systems & Sales, LLC	13.50%				Secured Debt	(5)	—	—	42	—	1,584	—	1,584
	13.50%				Secured Debt	(5)	—	—	1,191	17,034	17	—	17,051
					Preferred Equity	(5)	—	496	120	7,454	496	—	7,950
Copper Trail Fund Investments					LP Interests (CTMH, LP)	(9)	—	—	—	568	—	—	568
Digital Products Holdings LLC	15.38%	SF+	10.00%		Secured Debt	(5)	—	—	1,116	14,690	34	1,453	13,271
					Preferred Member Units	(5)	—	—	100	9,835	—	—	9,835
Garreco, LLC		SF+	8.00%		Secured Debt	(8)	—	—	92	3,088	—	3,088	—
					Member Units	(8)	—	—	43	1,580	—	—	1,580
Harrison Hydra-Gen, Ltd.					Common Stock	(8)	—	560	—	4,660	560	—	5,220
JorVet Holdings, LLC	12.00%				Secured Debt	(9)	—	—	1,584	25,483	30	647	24,866
					Preferred Equity	(9)	—	—	490	10,741	—	—	10,741
KBK Industries, LLC	9.00%				Secured Debt	(5)	—	(8)	214	4,700	8	408	4,300
					Member Units	(5)	—	2,050	1,135	22,770	2,050	—	24,820
MS Private Loan Fund I, LP	5.00%				Secured Debt (12)	(8)	—	—	32	—	15,500	8,500	7,000
					LP Interests (12)	(8)	—	(58)	1,089	14,527	—	58	14,469
MS Private Loan Fund II, LP	8.88%	SF+	3.50%		Secured Debt (12)	(8)	—	—	1,446	23,367	32,541	6,500	49,408
					LP Interests (12)	(8)	—	85	93	1,561	2,249	—	3,810
MSC Income Fund, Inc.					Common Equity	(8)	—	(131)	868	10,025	5,000	131	14,894
NAPCO Precast, LLC					Member Units	(8)	—	(1,350)	63	11,730	—	1,350	10,380
Nello Industries Investco, LLC	11.88%	SF+	6.50%		Secured Debt (12)	(5)	—	—	118	—	10,946	—	10,946
	13.50%				Secured Debt	(5)	—	—	751	—	24,556	—	24,556
					Common Equity	(5)	—	—	—	—	12,120	—	12,120
NexRev LLC	10.00%				Secured Debt (12)	(8)	—	—	42	—	1,600	—	1,600
	10.00%				Secured Debt	(8)	—	34	522	9,751	60	—	9,811
					Preferred Member Units	(8)	—	1,860	471	6,350	1,860	—	8,210
NRP Jones, LLC	12.00%				Secured Debt	(5)	—	—	126	2,080	—	—	2,080
					Member Units	(5)	—	(77)	—	1,466	—	77	1,389
					Member Units	(5)	—	(3)	—	53	—	3	50
NuStep, LLC	11.98%	SF+	6.50%		Secured Debt	(5)	—	—	221	3,600	—	—	3,600
	12.00%				Secured Debt	(5)	—	—	1,125	18,426	6	—	18,432
					Preferred Member Units	(5)	—	960	—	9,240	960	—	10,200
					Preferred Member Units	(5)	—	—	—	5,150	—	—	5,150
Orttech Holdings, LLC		SF+	11.00%		Secured Debt (12)	(5)	—	—	—	—	—	—	—
	16.48%	SF+	11.00%		Secured Debt	(5)	—	(23)	1,852	22,040	23	103	21,960
					Preferred Stock	(5)	—	(1,990)	264	17,050	—	1,990	15,060
Pearl Meyer Topco LLC	12.00%				Secured Debt	(6)	—	—	279	3,500	1,500	—	5,000
	12.00%				Secured Debt	(6)	—	110	1,724	20,000	18,219	—	38,219
	12.00%				Secured Debt	(6)	—	(13)	1,692	27,681	13	13	27,681

125

Table of contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2024

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)		Amount of Unrealized Gain/(Loss)		Amount of Interest, Fees or Dividends Credited to Income (2)		December 31, 2023 Fair Value (13)		Gross Additions (3)		Gross Reductions (4)		June 30, 2024 Fair Value (13)
					Preferred Equity	(6)	—		9,250		5,885		44,090		9,250		—		53,340
Pinnacle TopCo, LLC					Secured Debt (12)	(8)	—		—		12		444		2		460		(14)
	13.00%				Secured Debt	(8)	—		—		2,044		30,339		30		—		30,369
					Preferred Equity	(8)	—		2,790		853		12,540		2,790		—		15,330
River Aggregates, LLC					Member Units	(8)	(409)		80		—		3,710		80		—		3,790
Tedder Industries, LLC	12.00%			12.00%	Secured Debt	(9)	—		—		56		1,726		—		—		1,726
	12.00%			12.00%	Secured Debt	(9)	—		(9,605)		461		14,262		—		9,605		4,657
					Preferred Member Units	(9)	—		—		—		—		—		—		—
					Preferred Member Units	(9)	—		—		—		—		—		—		—
					Preferred Member Units	(9)	—		—		—		—		—		—		—
Televerde, LLC					Member Units	(8)	—		(2,164)		—		4,734		—		2,164		2,570
					Preferred Stock	(8)	—		—		—		1,794		—		1		1,793
Vision Interests, Inc.					Series A Preferred Stock	(9)	—		—		—		3,000		—		—		3,000
VVS Holdco LLC		SF+	6.00%		Secured Debt (12)	(5)	—		—		8		—		—		—		—
	11.50%				Secured Debt	(5)	—		—		1,648		28,035		34		1,160		26,909
					Preferred Equity	(5)	—		—		204		12,240		—		—		12,240
							—		—		—		—		—		—		—
							—		—		—		—		—		—		—
Other
Amounts related to investments transferred to or from other 1940 Act classification during the period							—		4,370		2,811		60,384		—		—		—
Total Control investments							$	(352)	$	37,659	$	102,437	$	2,006,698	$	243,661	$	114,546	$	2,075,429
Affiliate Investments
423 HAR, LP					LP Interests (423 HAR, L.P.)	(8)	$	—	$	51	$	—	$	996	$	52	$	—	$	1,048
AAC Holdings, Inc.	18.00%			18.00%	Secured Debt (12)	(7)	—		(2)		44		418		60		2		476
	18.00%			18.00%	Secured Debt	(7)	—		(44)		1,404		13,895		1,919		44		15,770
					Common Stock	(7)	—		—		—		—		—		—		—
					Warrants	(7)	—		—		—		—		—		—		—
Boccella Precast Products LLC	10.00%				Secured Debt	(6)	—		(55)		16		320		—		55		265
					Member Units	(6)	—		(1,680)		18		1,990		—		1,680		310
Buca C, LLC	14.00%			14.00%	Secured Debt	(7)	—		—		563		12,144		371		—		12,515
	6.00%			6.00%	Preferred Member Units	(7)	—		—		—		—		—		—		—
	14.00%			14.00%	Secured Debt (12)	(7)	—		—		—		—		58		—		58
Career Team Holdings, LLC	11.38%	SF+	6.00%		Secured Debt (12)	(6)	—		—		53		881		1,803		1,800		884
	13.00%				Secured Debt	(6)	—		—		1,330		19,906		21		180		19,747
					Common Stock	(6)	—		—		—		4,500		—		—		4,500
Classic H&G Holdings, LLC		SF+	6.00%		Secured Debt	(6)	—		—		181		4,560		—		4,560		—
					Secured Debt	(6)	—		(50)		654		19,274		50		19,324		—
					Preferred Member Units	(6)	10,365		(7,771)		1,470		16,000		10,365		23,896		2,469
Congruent Credit Opportunities Funds					LP Interests (Congruent Credit Opportunities Fund III, LP)	(8)	—		(51)		152		4,352		—		1,810		2,542
DMA Industries, LLC	12.00%				Secured Debt	(7)	—		(28)		1,139		18,800		28		2,028		16,800
					Preferred Equity	(7)	—		(1,716)		—		7,660		3,068		1,716		9,012

126

Table of contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2024

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2023 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2024 Fair Value (13)
	12.00%				Secured Debt	(7)	—	6	8	—	560	—	560
Dos Rios Partners					LP Interests (Dos Rios Partners, LP)	(8)	—	111	—	8,443	111	142	8,412
					LP Interests (Dos Rios Partners - A, LP)	(8)	—	35	—	2,631	35	45	2,621
Dos Rios Stone Products LLC					Class A Preferred Units	(8)	—	(250)	—	1,580	—	250	1,330
EIG Fund Investments					LP Interests (EIG Global Private Debt Fund-A, L.P.)	(8)	—	—	42	760	1	—	761
FCC Intermediate Holdco, LLC	13.00%				Secured Debt	(5)	—	—	1,198	—	28,691	—	28,691
					Warrants	(5)	—	—	—	—	3,920	—	3,920
Flame King Holdings, LLC					Preferred Equity	(9)	—	7,850	1,570	27,900	7,850	—	35,750
Freeport Financial SBIC Fund LP					LP Interests (Freeport Financial SBIC Fund LP)	(5)	—	(77)	—	3,012	—	356	2,656
					LP Interests (Freeport First Lien Loan Fund III LP)	(5)	—	—	255	3,704	1	1,109	2,596
GFG Group, LLC	8.00%				Secured Debt	(5)	—	(10)	388	9,345	10	10	9,345
					Preferred Member Units	(5)	—	(1,650)	781	11,460	—	1,650	9,810
Gulf Manufacturing, LLC		SF+	7.63%		Secured Debt (12)	(8)	—	47	111	—	—	—	—
	13.00%	SF+	7.63%		Secured Debt	(8)	—	373	2,887	—	40,000	—	40,000
					Member Units	(8)	—	5,910	1,092	9,070	5,910	—	14,980
Hawk Ridge Systems, LLC	11.48%	SF+	6.00%		Secured Debt	(9)	—	—	142	1,974	3,876	3,760	2,090
	12.50%				Secured Debt	(9)	—	(27)	2,887	45,256	27	27	45,256
					Preferred Member Units	(9)	—	600	—	17,460	600	—	18,060
					Preferred Member Units	(9)	—	30	—	920	30	—	950
Houston Plating and Coatings, LLC	8.00%				Unsecured Convertible Debt	(8)	—	60	121	2,880	60	—	2,940
					Member Units	(8)	—	(130)	34	3,340	—	130	3,210
HPEP 3, L.P.					LP Interests (HPEP 3, L.P.) (12)	(8)	—	247	—	4,225	247	—	4,472
					LP Interests (HPEP 4, L.P.) (12)	(8)	—	329	—	3,773	1,211	—	4,984
					LP Interests (423 COR, L.P.)	(8)	—	675	88	1,869	2,175	—	4,044
I-45 SLF LLC					Member Units (Fully diluted 20.0%; 21.75% profits interest)	(8)	(7,107)	6,710	429	13,490	—	13,490	—
Independent Pet Partners Intermediate Holdings, LLC					Common Equity	(6)	—	420	—	17,690	420	—	18,110
Infinity X1 Holdings, LLC	13.00%				Secured Debt	(9)	—	—	1,147	17,403	33	2,050	15,386
					Preferred Equity	(9)	—	—	512	4,000	368	—	4,368
Integral Energy Services	13.06%	SF+	7.50%		Secured Debt	(8)	—	330	955	13,891	380	1,570	12,701
	10.00%			10.00%	Preferred Equity	(8)	—	125	15	300	140	—	440
					Common Stock	(8)	—	390	21	160	390	—	550
Iron-Main Investments, LLC	13.50%				Secured Debt	(5)	—	—	311	4,487	3	—	4,490
	13.50%				Secured Debt	(5)	—	—	203	2,922	2	—	2,924
	13.50%				Secured Debt	(5)	—	—	610	8,944	—	—	8,944

127

Table of contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2024

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)	Amount of Unrealized Gain/(Loss)	Amount of Interest, Fees or Dividends Credited to Income (2)	December 31, 2023 Fair Value (13)	Gross Additions (3)	Gross Reductions (4)	June 30, 2024 Fair Value (13)
	13.50%				Secured Debt	(5)	—	—	1,363	19,503	26	2,000	17,529
	13.50%				Secured Debt	(5)	—	—	752	10,273	45	400	9,918
					Common Stock	(5)	—	—	—	2,680	—	—	2,680
					Preferred Equity	(5)	—	—	—	—	711	—	711
ITA Holdings Group, LLC	16.46%	SF+	9.00%	2.00%	Secured Debt	(8)	—	—	86	816	365	—	1,181
	16.46%	SF+	9.00%	2.00%	Secured Debt (12)	(8)	—	—	63	697	10	—	707
	15.46%	SF+	8.00%	2.00%	Secured Debt	(8)	—	—	476	3,430	177	—	3,607
	17.46%	SF+	10.00%	2.00%	Secured Debt	(8)	—	—	521	3,430	177	—	3,607
					Warrants	(8)	—	569	—	2,091	569	—	2,660
Johnson Downie Opco, LLC					Secured Debt (12)	(8)	—	(3)	12	—	3	3	—
	15.00%				Secured Debt	(8)	—	(29)	1,829	24,207	29	2,729	21,507
					Preferred Equity	(8)	—	3,450	469	9,620	3,450	—	13,070
Nebraska Vet AcquireCo, LLC	12.48%	SF+	7.00%		Secured Debt (12)	(5)	—	8	19	—	1,250	—	1,250
					Secured Debt	(5)	—	(121)	1,205	25,794	—	25,794	—
					Secured Debt	(5)	—	(43)	454	10,500	—	10,500	—
					Preferred Member Units	(5)	—	4,390	474	15,020	4,390	—	19,410
	12.50%				Secured Debt	(5)	—	140	1,425	—	62,200	—	62,200
					Secured Debt	(5)	—	198	108	—	—	—	—
OnAsset Intelligence, Inc.	12.00%			12.00%	Secured Debt	(8)	—	(110)	—	326	—	111	215
	12.00%			12.00%	Secured Debt	(8)	—	(113)	—	332	—	112	220
	12.00%			12.00%	Secured Debt	(8)	—	(243)	—	716	—	243	473
	12.00%			12.00%	Secured Debt	(8)	—	(506)	—	1,493	—	506	987
	10.00%			10.00%	Unsecured Debt	(8)	—	—	—	305	—	—	305
	7.00%			7.00%	Preferred Stock	(8)	—	—	—	—	—	—	—
					Common Stock	(8)	—	—	—	—	—	—	—
					Warrants	(8)	—	—	—	—	—	—	—
Oneliance, LLC		SF+	10.00%		Secured Debt	(7)	—	—	—	—	—	—	—
	15.48%	SF+	10.00%		Secured Debt	(7)	—	83	438	5,350	90	240	5,200
					Preferred Stock	(7)	—	522	—	1,128	522	—	1,650
Quality Lease Service, LLC					Preferred Member Units	(8)	(2,505)	2,500	—	—	2,500	2,500	—
SI East, LLC	11.75%				Secured Debt (12)	(7)	—	(2)	121	1,125	2,252	1,127	2,250
					Secured Debt	(7)	—	(241)	2,599	54,536	—	54,536	—
	12.62%				Secured Debt	(7)	—	58	1,464	—	67,661	—	67,661
					Preferred Member Units	(7)	—	(1,480)	1,858	19,170	—	1,480	17,690
Slick Innovations, LLC	14.00%				Secured Debt	(6)	—	86	1,231	11,440	7,600	960	18,080
					Common Stock	(6)	—	26	234	2,310	26	456	1,880
Student Resource Center, LLC	8.50%			8.50%	Secured Debt	(6)	—	(1,546)	—	3,190	—	1,546	1,644
					Preferred Equity	(6)	—	—	—	—	—	—	—
Superior Rigging & Erecting Co.					Secured Debt	(7)	—	—	1,193	20,427	73	20,500	—
					Preferred Member Units	(7)	—	490	—	5,940	490	—	6,430
The Affiliati Network, LLC					Secured Debt (12)	(9)	—	—	9	150	642	800	(8)
	10.00%				Secured Debt	(9)	—	—	440	7,347	14	1,200	6,161
					Preferred Stock	(9)	—	—	53	6,400	—	—	6,400
					Preferred Stock	(9)	—	—	—	172	64	—	236

128

Table of contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2024

(dollars in thousands)

(Unaudited)


Company	Total Rate	Base Rate	Spread	PIK Rate	Type of Investment (1) (10) (11)	Geography	Amount of Realized Gain/(Loss)		Amount of Unrealized Gain/(Loss)		Amount of Interest, Fees or Dividends Credited to Income (2)		December 31, 2023 Fair Value (13)		Gross Additions (3)		Gross Reductions (4)		June 30, 2024 Fair Value (13)
UnionRock Energy Fund II, LP					LP Interests (12)	(9)	—		197		—		5,694		198		168		5,724
UnionRock Energy Fund III, LP					LP Interests (12)	(9)	—		994		—		2,838		3,494		—		6,332
UniTek Global Services, Inc.	15.00%			15.00%	Secured Convertible Debt	(6)	—		—		132		3,889		132		—		4,021
	15.00%			15.00%	Secured Convertible Debt	(6)	—		—		65		1,908		64		—		1,972
	20.00%			20.00%	Preferred Stock	(6)	—		(224)		270		2,833		271		224		2,880
	20.00%			20.00%	Preferred Stock	(6)	—		140		—		3,698		140		—		3,838
	19.00%			19.00%	Preferred Stock	(6)	—		—		—		—		—		—		—
	13.50%			13.50%	Preferred Stock	(6)	—		—		—		—		—		—		—
					Common Stock	(6)	—		—		—		—		—		—		—
Universal Wellhead Services Holdings, LLC	14.00%			14.00%	Preferred Member Units	(8)	—		(150)		—		150		—		150		—
					Member Units	(8)	—		—		—		—		—		—		—
Urgent DSO LLC	13.50%				Secured Debt	(5)	—		—		631		—		8,718		—		8,718
	9.00%			9.00%	Preferred Equity	(5)	—		—		136		—		4,136		—		4,136
World Micro Holdings, LLC	13.00%				Secured Debt	(7)	—		—		778		12,028		12		—		12,040
					Preferred Equity	(7)	—		—		—		3,845		—		—		3,845
Other
Amounts related to investments transferred to or from other 1940 Act classification during the period							—		(4,370)		(2,811)		(60,384)		—		—		—
Total Affiliate investments							$	753	$	15,428	$	40,928	$	615,002	$	287,347	$	209,969	$	752,764

___________________________

(5)Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of June 30, 2024 for Control investments located in this region was $514,812. This represented 20.0% of net assets as of June 30, 2024. The fair value as of June 30, 2024 for Affiliate investments located in this region was $199,928. This represented 7.8% of net assets as of June 30, 2024.

129

Table of contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates (Continued)

June 30, 2024

(dollars in thousands)

(Unaudited)

(6)Portfolio company located in the Northeast region and Canada as determined by location of the corporate headquarters. The fair value as of June 30, 2024 for Control investments located in this region was $294,943. This represented 11.4% of net assets as of June 30, 2024. The fair value as of June 30, 2024 for Affiliate investments located in this region was $80,600. This represented 3.1% of net assets as of June 30, 2024.

(7)Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of June 30, 2024 for Control investments located in this region was $49,880. This represented 1.9% of net assets as of June 30, 2024. The fair value as of June 30, 2024 for Affiliate investments located in this region was $171,957. This represented 6.7% of net assets as of June 30, 2024.

(8)Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of June 30, 2024 for Control investments located in this region was $826,500. This represented 32.0% of net assets as of June 30, 2024. The fair value as of June 30, 2024 for Affiliate investments located in this region was $153,574. This represented 6.0% of net assets as of June 30, 2024.

(9)Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of June 30, 2024 for Control investments located in this region was $389,294. This represented 15.1% of net assets as of June 30, 2024. The fair value as of June 30, 2024 for Affiliate investments located in this region was $146,705. This represented 5.7% of net assets as of June 30, 2024.

(10)All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted.

(12)Investment has an unfunded commitment as of June 30, 2024 (see Note K — Commitments and Contingencies). The fair value of the investment includes the impact of the fair value of any unfunded commitments.

(13)Negative fair value is the result of the capitalized discount being greater than the principal amount outstanding on the loan.

130

Table of contents

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This Quarterly Report on Form 10-Q contains forward-looking statements regarding the plans and objectives of management for future operations and which relate to future events or our future performance or financial condition. Any such forward-looking statements may involve known and unknown risks, uncertainties and other factors which may cause our actual results, performance or achievements to be materially different from future results, performance or achievements expressed or implied by any forward-looking statements. Forward-looking statements, which involve assumptions and describe our future plans, strategies and expectations, are generally identifiable by use of the words “may,” “will,” “should,” “expect,” “anticipate,” “estimate,” “believe,” “intend” or “project” or the negative of these words or other variations on these words or comparable terminology. These forward-looking statements are based on assumptions that may be incorrect, and we cannot assure you that the projections included in these forward-looking statements will come to pass. Our actual results could differ materially from those expressed or implied by the forward-looking statements as a result of various factors, including, without limitation, the factors referenced in Item 1A entitled “Risk Factors” below in this Quarterly Report on Form 10-Q, if any, and discussed in Item 1A entitled “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2024, filed with the Securities and Exchange Commission (“SEC”) on February 28, 2025 and elsewhere in this Quarterly Report on Form 10-Q and our other SEC filings. Other factors that could cause actual results to differ materially include changes in the economy and future changes in laws or regulations and conditions in our operating areas.

We have based the forward-looking statements included in this Quarterly Report on Form 10-Q on information available to us on the date of this Quarterly Report on Form 10-Q, and we assume no obligation to update any such forward-looking statements, unless we are required to do so by applicable law. However, you are advised to refer to any additional disclosures that we may make directly to you or through reports that we in the future may file with the SEC, including subsequent periodic and current reports.

This discussion should be read in conjunction with our consolidated financial statements as of December 31, 2024, and for the year then ended, and Management’s Discussion and Analysis of Financial Condition and Results of Operations, both contained in our Annual Report on Form 10-K for the year ended December 31, 2024, as well as the consolidated financial statements (unaudited) and notes to the consolidated financial statements (unaudited) contained in this report.

ORGANIZATION

131

Table of contents

Unless otherwise noted or the context otherwise indicates, the terms “we,” “us,” “our,” the “Company” and “Main Street” refer to MSCC and its consolidated subsidiaries, which include the Funds, the Taxable Subsidiaries and the Structured Subsidiaries.

OVERVIEW OF OUR BUSINESS

Our principal investment objective is to maximize our Investment Portfolio’s total return by generating current income from our debt investments and current income and capital appreciation from our equity and equity-related investments, including warrants, convertible securities and other rights to acquire equity securities in a portfolio company. We seek to achieve our investment objective primarily through our LMM and Private Loan investment strategies. Our LMM investment strategy involves investments in companies that generally have annual revenues between $10 million and $150 million and annual earnings before interest, tax, depreciation and amortization expenses (“EBITDA”) between $3 million and $20 million. Our LMM portfolio investments generally range in size from $5 million to $125 million. Our Private Loan investment strategy involves investments in companies that generally have annual revenues between $25 million and $500 million and annual EBITDA between $7.5 million and $50 million. Our Private Loan investments generally range in size from $10 million to $100 million.

We seek to fill the financing gap for LMM businesses, which, historically, have had limited access to financing from commercial banks and other traditional sources. The underserved nature of the LMM creates the opportunity for us to meet the financing needs of LMM companies while also negotiating favorable transaction terms and equity participation. Our ability to invest across a company’s capital structure, from secured loans to equity securities, allows us to offer portfolio companies a comprehensive suite of financing options, or a “one-stop” financing solution. We believe that providing customized, “one-stop” financing solutions is important and valuable to LMM portfolio companies. We generally seek to partner directly with entrepreneurs, management teams and business owners in making our LMM investments. Our LMM portfolio debt investments are generally secured by a first lien on the assets of the portfolio company and typically have a term of between five and seven years from the original investment date.

132

Table of contents

Private Loan investments primarily consist of debt securities that have primarily been originated directly by us or, to a lesser extent, through our strategic relationships with other investment funds on a collaborative basis through investments that are often referred to in the debt markets as “club deals” because of the small lender group size. In both cases, our Private Loan investments are typically made in a company owned by or in the process of being acquired by a private equity fund. Our Private Loan portfolio debt investments are generally secured by a first priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date. We may also co-invest with the private equity fund in the equity securities of our Private Loan portfolio companies.

We also maintain a legacy portfolio of investments in larger Middle Market companies. Our Middle Market investments are generally debt investments in companies owned by private equity funds that were originally issued through a syndication financing process. We have generally stopped making new Middle Market investments and expect the size of our Middle Market investment portfolio to continue to decline in future periods as existing Middle Market investments are repaid or sold. Our Middle Market debt investments generally range in size from $3 million to $25 million, are generally secured by a first priority lien on the assets of the portfolio company and typically have an expected duration of between three and seven years from the original investment date.

Our Other Portfolio investments primarily consist of investments that are not consistent with the typical profiles for our LMM, Private Loan or Middle Market portfolio investments, including investments which may be managed by third parties. In our Other Portfolio, we may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds.

Based upon our liquidity and capital structure management activities, our Investment Portfolio may also periodically include short-term portfolio investments that are atypical of our LMM and Private Loan portfolio investments in that they are intended to be a short-term deployment of capital. These assets are typically expected to be realized in one year or less and are not expected to be a significant portion of our overall Investment Portfolio.

Our external asset management business is conducted through the External Investment Manager. The External Investment Manager earns management fees based on the assets of the funds under management and may earn incentive fees, or a carried interest, based on the performance of the funds managed.

Our portfolio investments are generally made through MSCC, the Taxable Subsidiaries, the Funds and the Structured Subsidiaries. MSCC, the Taxable Subsidiaries, the Funds and the Structured Subsidiaries share the same investment strategies and criteria, although they are subject to different regulatory regimes. An investor’s return in MSCC will depend, in part, on the Taxable Subsidiaries’, the Funds’ and the Structured Subsidiaries’ investment returns as they are wholly-owned subsidiaries of MSCC.

The level of new portfolio investment activity will fluctuate from period to period based upon our view of the current economic fundamentals, our ability to identify new investment opportunities that meet our investment criteria and our ability to consummate the identified opportunities. The level of new investment activity, and associated interest and fee income, will directly impact future investment income. In addition, the level of dividends paid by portfolio companies and the portion of our portfolio debt investments on non-accrual status will directly impact future investment income. While we intend to grow our portfolio and our investment income over the long term, our growth and our operating results may be more limited during depressed economic periods. However, we intend to appropriately manage our cost structure and liquidity position based on applicable economic conditions and our investment outlook. The level of realized gains or losses and unrealized appreciation or depreciation on our investments will also fluctuate depending upon portfolio activity, economic conditions and the performance of our individual portfolio companies. The changes in realized gains and losses and unrealized appreciation or depreciation could have a material impact on our operating results.

133

Table of contents

Because we are internally managed, we do not pay any external investment advisory fees, but instead directly incur the operating costs associated with employing investment and portfolio management professionals. We believe that our internally managed structure provides us with a better alignment of interests between our management team and our employees and our stockholders and a beneficial operating expense structure when compared to other publicly traded and privately held investment firms which are externally managed, and our internally managed structure allows us the opportunity to leverage our non-interest operating expenses as we grow our Investment Portfolio and our External Investment Manager’s asset management business (as described below). The ratio of our total operating expenses, excluding interest expense, as a percentage of our quarterly average total assets was 1.3% for each of the trailing twelve months ended June 30, 2025 and 2024 and for the year ended December 31, 2024. The ratio of our total operating expenses, including interest expense, as a percentage of our quarterly average total assets was 3.8% and 3.6% for the trailing twelve months ended June 30, 2025 and 2024, respectively, and 3.8% for the year ended December 31, 2024. Our ratio of expenses as a percentage of our average net asset value is described in greater detail in Note F — Financial Highlights to the consolidated financial statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

The External Investment Manager serves as the investment adviser and administrator to MSC Income Fund, Inc. (“MSC Income”) pursuant to an Investment Advisory and Administrative Services Agreement entered into in October 2020 between the External Investment Manager and MSC Income (as amended and restated on January 29, 2025, the “Advisory Agreement”). Under the Advisory Agreement, prior to January 29, 2025, the External Investment Manager earned a 1.75% annual base management fee on MSC Income’s average total assets, a subordinated incentive fee on income equal to 20% of pre-incentive fee net investment income above a specified investment return hurdle rate and a 20% incentive fee on cumulative net realized capital gains in exchange for providing advisory services to MSC Income. On and after January 29, 2025, under the Advisory Agreement, the External Investment Manager earns a 1.5% annual base management fee on MSC Income’s average total assets (including cash and cash equivalents), payable quarterly in arrears (with additional future contractual reductions based upon changes to MSC Income’s investment portfolio composition), a subordinated incentive fee on income equal to 17.5% of pre-incentive fee net investment income above a specified investment return hurdle rate, subject to a 50% / 50% catch-up feature, and a 17.5% incentive fee on cumulative net realized capital gains from January 29, 2025.

Additionally, the External Investment Manager has entered into investment management agreements with MS Private Loan Fund I, LP (“Private Loan Fund I”) and MS Private Loan Fund II, LP (“Private Loan Fund II”), each a private investment fund with a strategy to co-invest with Main Street in Private Loan portfolio investments, pursuant to which the External Investment Manager provides investment advisory and management services to each fund in exchange for an asset-based management fee and certain incentive fees. The External Investment Manager may also advise other clients, including funds and separately managed accounts, pursuant to advisory and services agreements with such clients in exchange for asset-based and incentive fees.

The External Investment Manager earns management fees based on the assets of the funds and accounts under management and may earn incentive fees, or a carried interest, based on the performance of the funds and accounts managed. For the three months ended June 30, 2025 and 2024, the External Investment Manager earned $5.7 million and $5.9 million in base management fees, respectively, $3.7 million and $4.1 million in incentive fees, respectively, and $0.2 million of administrative service fee income for each of the three months ended June 30, 2025 and 2024. For the six months ended June 30, 2025 and 2024, the External Investment Manager earned $11.5 million and $11.6 million in base management fees, respectively, $6.4 million and $8.0 million in incentive fees, respectively, and $0.3 million of administrative service fee income for each of the six months ended June 30, 2025 and 2024.

We have entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for its relationship with MSC Income and its other clients. Through this agreement, we share employees with the External Investment Manager, including their related infrastructure, business relationships, management expertise and capital raising capabilities, and we allocate the related expenses to the External Investment Manager pursuant to the sharing agreement. Our total expenses for each of the three months ended June 30, 2025 and 2024 are net of expenses allocated to the External Investment Manager of $5.9 million. Our total expenses for the six months ended June 30, 2025 and 2024 are net of expenses allocated to the External Investment Manager of $11.2 million and $11.4 million, respectively.

134

Table of contents

The total contribution of the External Investment Manager to our net investment income consists of the combination of the expenses allocated to the External Investment Manager and the dividend income earned from the External Investment Manager. For the three months ended June 30, 2025 and 2024, dividends accrued by us from the External Investment Manager were $2.8 million and $3.3 million, respectively. For the three months ended June 30, 2025 and 2024, the total contribution of the External Investment Manager to our net investment income was $8.7 million and $9.2 million, respectively. For the six months ended June 30, 2025 and 2024, dividends accrued by us from the External Investment Manager were $5.3 million and $6.3 million, respectively. For the six months ended June 30, 2025 and 2024, the total contribution of the External Investment Manager to our net investment income was $16.6 million and $17.8 million, respectively.

We have received an exemptive order from the SEC permitting co-investments among us, MSC Income and other advisory clients of the External Investment Manager in certain negotiated transactions where co-investing would otherwise be prohibited under the 1940 Act. We have made co-investments with, and in the future intend to continue to make co-investments with MSC Income, Private Loan Fund I, Private Loan Fund II and other advisory clients of the External Investment Manager, in accordance with the conditions of the order. The order requires, among other things, that we and the External Investment Manager consider whether each such investment opportunity is appropriate for us and the External Investment Manager’s advised clients, as applicable, and if it is appropriate, to propose an allocation of the investment opportunity between such parties. Because the External Investment Manager may earn performance-based fee compensation from its advisory clients, this may provide the Company and the External Investment Manager an incentive to allocate opportunities to advisory clients instead of us. However, both we and the External Investment Manager have policies and procedures in place to manage this conflict, including approval of investment allocations and oversight of co-investments by the independent members of our Board of Directors. In addition to the co-investment program described above, we also co-invest in certain investment transactions where price is the only negotiated point by us and our affiliates.

INVESTMENT PORTFOLIO SUMMARY

The following tables provide a summary of our investments in the LMM and Private Loan portfolios as of June 30, 2025 and December 31, 2024 (this information excludes Middle Market, Other Portfolio investments and the External Investment Manager, which are discussed further below).


	As of June 30, 2025
	LMM (a)			Private Loan
	(dollars in millions)
Number of portfolio companies	88			87
Fair value	$	2,668.8		$	1,920.3
Cost	$	2,105.0		$	1,958.0
Debt investments as a % of portfolio (at cost)	70.1		%	94.7		%
Equity investments as a % of portfolio (at cost)	29.9		%	5.3		%
% of debt investments at cost secured by first priority lien	99.3		%	99.9		%
Weighted-average annual effective yield (b)	12.8		%	11.4		%
Average EBITDA (c)	$	10.4		$	32.5

___________________________

(a)As of June 30, 2025, we had equity ownership in all of our LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 38%.

(b)The weighted-average annual effective yields were computed using the effective interest rates for all debt investments as of June 30, 2025, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status, and are weighted based upon the principal amount of each applicable debt investment as of June 30, 2025. The weighted-average annual effective yield on our debt portfolio as of June 30, 2025, including debt investments on non-accrual status, was 12.1% for our LMM portfolio and 10.0% for our Private Loan portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of our common stock will realize on its investment because it does not reflect changes in the market value of our stock, our utilization of debt capital in our capital structure, our expenses or any sales load paid by an investor.

135

Table of contents

(c)The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan portfolio. These calculations exclude certain portfolio companies, including six LMM portfolio companies and six Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for our investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate and those portfolio companies whose primary operations have ceased and only residual value remains.


	As of December 31, 2024
	LMM (a)			Private Loan
	(dollars in millions)
Number of portfolio companies	84			91
Fair value	$	2,502.9		$	1,904.3
Cost	$	1,937.8		$	1,952.5
Debt investments as a % of portfolio (at cost)	70.8		%	95.4		%
Equity investments as a % of portfolio (at cost)	29.2		%	4.6		%
% of debt investments at cost secured by first priority lien	99.2		%	99.9		%
Weighted-average annual effective yield (b)	12.8		%	11.8		%
Average EBITDA (c)	$	10.2		$	30.5

___________________________

(a)As of December 31, 2024, we had equity ownership in all of our LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was 38%.

(b)The weighted-average annual effective yields were computed using the effective interest rates for all debt investments as of December 31, 2024, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status, and are weighted based upon the principal amount of each applicable debt investment as of December 31, 2024. The weighted-average annual effective yield on our debt portfolio as of December 31, 2024, including debt investments on non-accrual status, was 12.3% for our LMM portfolio and 11.5% for our Private Loan portfolio. The weighted-average annual effective yield is not reflective of what an investor in shares of our common stock will realize on its investment because it does not reflect changes in the market value of our stock, our utilization of debt capital in our capital structure, our expenses or any sales load paid by an investor.

(c)The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Private Loan portfolio. These calculations exclude certain portfolio companies, including five LMM portfolio companies and five Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for our investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate and those portfolio companies whose primary operations have ceased and only residual value remains.

For the three months ended June 30, 2025 and 2024, we achieved an annualized total return on investments of 16.4% and 15.7%, respectively. For each of the six months ended June 30, 2025 and 2024, we achieved an annualized total return on investments of 16.2%. For the year ended December 31, 2024, we achieved a total return on investments of 17.9%. Total return on investments is calculated using the interest, dividend and fee income, as well as the realized and unrealized change in fair value of the Investment Portfolio for the specified period. Our total return on investments is not reflective of what an investor in shares of our common stock will realize on its investment because it does not reflect changes in the market value of our stock, our utilization of debt capital in our capital structure, our expenses or any sales load paid by an investor.

As of June 30, 2025, we had Middle Market portfolio investments in 12 portfolio companies, collectively totaling $108.7 million in fair value and $134.2 million in cost basis, which comprised 2.1% and 3.1% of our Investment Portfolio at fair value and cost, respectively. As of December 31, 2024, we had Middle Market portfolio investments in 15 portfolio companies, collectively totaling $155.3 million in fair value and $195.0 million in cost basis, which comprised 3.1% and 4.6% of our Investment Portfolio at fair value and cost, respectively.

As of June 30, 2025, we had Other Portfolio investments in 32 entities, spread across 12 investment managers, collectively totaling $122.7 million in fair value and $126.0 million in cost basis, which comprised 2.4% and 2.9% of our Investment Portfolio at fair value and cost, respectively. As of December 31, 2024, we had Other Portfolio investments in 31 entities, spread across 12 investment managers, collectively totaling $124.1 million in fair value and $122.5 million in cost basis, which comprised 2.5% and 2.9% of our Investment Portfolio at fair value and cost, respectively.

136

Table of contents

As previously discussed in Note A.1. — Organization and Basis of Presentation — Organization, we hold an investment in the External Investment Manager, a wholly-owned subsidiary that is treated as a portfolio investment. As of June 30, 2025, this investment had a fair value of $272.6 million and a cost basis of $29.5 million, which comprised 5.4% and 0.7% of our Investment Portfolio at fair value and cost, respectively. As of December 31, 2024, this investment had a fair value of $246.0 million and a cost basis of $29.5 million, which comprised 5.0% and 0.7% of our Investment Portfolio at fair value and cost, respectively.

CRITICAL ACCOUNTING POLICIES

The preparation of financial statements and related disclosures in conformity with generally accepted accounting principles (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and contingent assets and liabilities at the date of the financial statements, and revenues and expenses during the periods reported. Actual results could materially differ from those estimates. Critical accounting policies are those that require management to make subjective or complex judgments about the effect of matters that are inherently uncertain and may change in subsequent periods. Changes that may be required in the underlying assumptions or estimates in these areas could have a material impact on our current and future financial condition and results of operations.

Management has discussed the development and selection of each critical accounting policy and estimate with the Audit Committee of the Board of Directors. Our critical accounting policies and estimates include the Investment Portfolio Valuation and Revenue Recognition policies described below. Our significant accounting policies are described in greater detail in Note B — Summary of Significant Accounting Policies to the consolidated financial statements included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

Investment Portfolio Valuation

The most significant determination inherent in the preparation of our consolidated financial statements is the valuation of our Investment Portfolio and the related amounts of unrealized appreciation and depreciation. We consider this determination to be a critical accounting estimate, given the significant judgments and subjective measurements required. As of both June 30, 2025 and December 31, 2024, our Investment Portfolio valued at fair value represented 96% of our total assets. We are required to report our investments at fair value. We follow the provisions of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 820, Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value and enhances disclosure requirements for fair value measurements. ASC 820 requires us to assume that the portfolio investment is to be sold in the principal market to independent market participants, which may be a hypothetical market. Market participants are defined as buyers and sellers in the principal market that are independent, knowledgeable and willing and able to transact. See Note B.1. — Summary of Significant Accounting Policies — Valuation of the Investment Portfolio included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q for a detailed discussion of our Investment Portfolio valuation process and procedures.

Due to the inherent uncertainty in the valuation process, our determination of fair value for our Investment Portfolio may differ materially from the values that would have been determined had a ready market for the securities existed. In addition, changes in the market environment, portfolio company performance and other events that may occur over the lives of the investments may cause the gains or losses ultimately realized on these investments to be materially different than the valuations currently assigned. We determine the fair value of each individual investment and record changes in fair value as unrealized appreciation or depreciation.

Rule 2a-5 under the 1940 Act permits a BDC’s board of directors to designate its executive officers or investment adviser as a valuation designee to determine the fair value for its investment portfolio, subject to the active oversight of the board. Our Board of Directors has approved policies and procedures pursuant to Rule 2a-5 (the “Valuation Procedures”) and has designated a group of our executive officers to serve as the Board of Directors’ valuation designee. We believe our Investment Portfolio as of June 30, 2025 and December 31, 2024 approximates fair value as of those dates based on the markets in which we operate and other conditions in existence on those reporting dates.

137

Table of contents

Revenue Recognition

Interest and Dividend Income

We record interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded as dividends are declared by the portfolio company or at the point an obligation exists for the portfolio company to make a distribution. We evaluate accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if we otherwise do not expect the debtor to be able to service its debt obligation, we will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt obligation, or if a loan or debt security is sold or written off, we remove it from non-accrual status.

Fee Income

We may periodically provide services, including structuring and advisory services, to our portfolio companies or other third parties. For services that are separately identifiable and evidence exists to substantiate fair value, fee income is recognized as earned, which is generally when the investment or other applicable transaction closes. Fees received in connection with debt financing transactions for services that do not meet these criteria are treated as debt origination fees and are generally deferred and accreted into income over the life of the financing.

Payment-in-Kind (“PIK”) Interest and Cumulative Dividends

We hold certain debt and preferred equity instruments in our Investment Portfolio that contain PIK interest and cumulative dividend provisions. The PIK interest, computed at the contractual rate specified in each debt agreement, is periodically added to the principal balance of the debt and is recorded as interest income. Thus, the actual collection of this interest may be deferred until the time of debt principal repayment. Cumulative dividends are recorded as dividend income, and any dividends in arrears are added to the balance of the preferred equity investment. The actual collection of these dividends in arrears may be deferred until such time as the preferred equity is redeemed or sold. To maintain RIC tax treatment (as discussed in Note B.10. — Summary of Significant Accounting Policies — Income Taxes included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though we may not have collected the PIK interest and cumulative dividends in cash. We stop accruing PIK interest and cumulative dividends and write off any accrued and uncollected interest and dividends in arrears when we determine that such PIK interest and dividends in arrears are no longer collectible. For the three months ended June 30, 2025 and 2024, (i) 2.3% and 3.7%, respectively, of our total investment income was attributable to PIK interest income not paid currently in cash and (ii) 0.9% and 0.5%, respectively, of our total investment income was attributable to cumulative dividend income not paid currently in cash. For the six months ended June 30, 2025 and 2024, 2.6% and 3.5%, respectively, of our total investment income was attributable to PIK interest income not paid currently in cash. For the six months ended June 30, 2025 and 2024, 0.7% and 0.4%, respectively, of our total investment income was attributable to cumulative dividend income not paid currently in cash.

138

Table of contents

INVESTMENT PORTFOLIO COMPOSITION

The following tables summarize the composition of our total combined LMM, Private Loan and Middle Market portfolio investments at cost and fair value by type of investment as a percentage of the total combined LMM, Private Loan and Middle Market portfolio investments as of June 30, 2025 and December 31, 2024 (this information excludes Other Portfolio investments and the External Investment Manager, which are discussed above).


Cost:	June 30, 2025		December 31, 2024
First lien debt	81.5	%	82.9	%
Equity	17.9		16.4
Second lien debt	0.1		0.2
Equity warrants	0.3		0.3
Other	0.2		0.2
	100.0	%	100.0	%


Fair Value:	June 30, 2025		December 31, 2024
First lien debt	70.5	%	71.4	%
Equity	28.7		27.8
Second lien debt	0.1		0.2
Equity warrants	0.5		0.4
Other	0.2		0.2
	100.0	%	100.0	%

Our LMM, Private Loan and Middle Market portfolio investments carry a number of risks including: (1) investing in companies which may have limited operating histories and financial resources; (2) holding investments that generally are not publicly traded and which may be subject to legal and other restrictions on resale; and (3) other risks common to investing in below investment-grade debt and equity investments in our Investment Portfolio. Please see Item 1A. Risk Factors contained in Part II of this Form 10-Q for further information.

PORTFOLIO ASSET QUALITY

We utilize an internally developed investment rating system to rate the performance of each LMM, Private Loan and Middle Market portfolio company and to monitor our expected level of returns on each of our LMM, Private Loan and Middle Market investments in relation to our expectations for the portfolio company. The investment rating system takes into consideration various factors, including, but not limited to, each investment’s expected level of returns, the collectability of our debt investments and the ability to receive a return of the invested capital in our equity investments, comparisons to competitors and other industry participants, the portfolio company’s future outlook and other factors that are deemed to be significant to the portfolio company.

As of June 30, 2025, investments on non-accrual status comprised 2.1% of our total Investment Portfolio at fair value and 5.0% at cost. As of December 31, 2024, investments on non-accrual status comprised 0.9% of our total Investment Portfolio at fair value and 3.5% at cost.

The operating results of our portfolio companies are impacted by changes in the broader fundamentals of the United States economy. In periods during which the United States economy contracts, it is likely that the financial results of small to mid-sized companies, like those in which we invest, could experience deterioration or limited growth from current levels, which could ultimately lead to difficulty in meeting their debt service requirements, to an increase in defaults on our debt investments or in realized losses on our investments and to difficulty in maintaining historical dividend payment rates and unrealized appreciation on our equity investments. Consequently, we can provide no assurance that the performance of certain portfolio companies will not be negatively impacted by future economic cycles or other conditions, which could also have a negative impact on our future results.

139

Table of contents

DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS

Comparison of the three months ended June 30, 2025 and 2024

Set forth below is a comparison of the results of operations, and a reconciliation of net investment income to distributable net investment income, for the three months ended June 30, 2025 and 2024. All prior period net investment income, net investment income per share, distributable net investment income and distributable net investment income per share amounts presented in this section have been retrospectively adjusted to conform to the current presentation. See Note A.3. — Organization and Basis of Presentation — Revisions to the Presentation of Previously Issued Financial Statements for details.


	Three Months Ended June 30,				Net Change
	2025		2024		Amount		%
	(in thousands)
Total investment income	$	143,973	$	132,154	$	11,819	9	%
Total expenses	(50,639)		(44,854)		(5,785)		13	%
Net investment income before taxes	93,334		87,300		6,034		7	%
Excise tax expense	(818)		(272)		(546)		201	%
Federal and state income and other tax expenses	(4,333)		(3,129)		(1,204)		38	%
Net investment income	88,183		83,899		4,284		5	%
Net realized gain	52,420		3,414		49,006		NM
Net unrealized appreciation (depreciation)	(18,951)		23,044		(41,995)		NM
Income tax benefit (provision) on net realized gain and net unrealized appreciation (depreciation)	882		(7,669)		8,551		NM
Net increase in net assets resulting from operations	$	122,534	$	102,688	$	19,846	19	%


	Three Months Ended June 30,				Net Change
	2025		2024		Amount		%
	(in thousands, except per share amounts)
Net investment income	$	88,183	$	83,899	$	4,284	5	%
Share‑based compensation expense	5,416		4,883		533		11	%

Deferred compensation expense	745		103		642		NM
Distributable net investment income (a)	$	94,344	$	88,885	$	5,459	6	%
Net investment income per share—Basic and diluted	$	0.99	$	0.97	$	0.02	2	%

Distributable net investment income per share—Basic and diluted (a)	$	1.06	$	1.03	$	0.03	3	%

___________________________

NM — Net Change % not meaningful

(a)Distributable net investment income is net investment income as determined in accordance with U.S. GAAP, excluding the impacts of share-based compensation expense and deferred compensation expense or benefit. We believe presenting distributable net investment income and the related per share amounts is useful and appropriate supplemental disclosure for analyzing our financial performance since share-based compensation does not require settlement in cash and deferred compensation expense or benefit does not result in a net cash impact to Main Street upon settlement. However, distributable net investment income is a non-U.S. GAAP measure and should not be considered as a replacement for net investment income or other earnings measures presented in accordance with U.S. GAAP and should be reviewed only in connection with such U.S. GAAP measures in analyzing our financial performance. A reconciliation of net investment income in accordance with U.S. GAAP to distributable net investment income is detailed in the table above.

140

Table of contents

Investment Income

Total investment income for the three months ended June 30, 2025 was $144.0 million, a 9% increase from the $132.2 million of total investment income for the corresponding period of 2024. The following table provides a summary of the changes in the comparable period activity.


	Three Months Ended June 30,				Net Change
	2025		2024		Amount		%
	(in thousands)
Interest income	$	100,857	$	100,031	$	826	1	%	(a)
Dividend income	37,845		26,688		11,157		42	%	(b)
Fee income	5,271		5,435		(164)		(3)	%
Total investment income	$	143,973	$	132,154	$	11,819	9	%	(c)

___________________________

(a)The increase in interest income was primarily due to higher average levels of income producing Investment Portfolio debt investments, partially offset by (i) an increase in investments on non-accrual status and (ii) a decrease in interest rates on floating rate Investment Portfolio debt investments primarily resulting from decreases in benchmark index rates.

(b)The increase in dividend income was primarily a result of (i) an increase of $11.5 million in dividend income from our LMM portfolio companies and (ii) an increase of $0.6 million in dividend income from our Private Loan portfolio companies, partially offset by a decrease of $0.5 million in dividend income from our External Investment Manager.

(c)The increase in total investment income includes a net increase of $3.0 million in certain income considered less consistent or non-recurring, including (i) a $3.0 million increase in such dividend income and (ii) a $0.7 million increase in such interest income from accelerated prepayment, repricing and other activity related to certain Investment Portfolio debt investments, partially offset by a $0.7 million decrease in such fee income.

Expenses

Total expenses for the three months ended June 30, 2025 were $50.6 million, a 13% increase from the $44.9 million in the corresponding period of 2024. The following table provides a summary of the changes in the comparable period activity.


	Three Months Ended June 30,				Net Change
	2025		2024		Amount		%
	(in thousands)
Cash compensation	$	11,932	$	11,219	$	713	6	%	(a)
Deferred compensation plan expense	745		103		642		NM
Compensation	12,677		11,322		1,355		12	%
General and administrative	5,919		5,375		544		10	%	(b)
Interest	32,519		29,161		3,358		12	%	(c)
Share-based compensation	5,416		4,883		533		11	%	(d)
Gross expenses	56,531		50,741		5,790		11	%
Expenses allocated to the External Investment Manager	(5,892)		(5,887)		(5)		—	%
Total expenses	$	50,639	$	44,854	$	5,785	13	%

___________________________

NM — Net Change % not meaningful

(a)The increase in cash compensation was primarily attributable to (i) increased incentive compensation accruals, (ii) increased headcount to support our growing Investment Portfolio and asset management activities and (iii) increased base compensation rates.

(b)The increase in general and administrative expense was primarily attributable to increased expenses related to business development activities.

141

Table of contents

(c)The increase in interest expense was primarily related to (i) an increase in average borrowings outstanding used to fund a portion of the growth of our Investment Portfolio and (ii) an increased weighted-average interest rate on our debt obligations resulting from the issuance of the June 2027 Notes and the repayment at maturity of the May 2024 Notes (each as defined in the Liquidity and Capital Resources section below), partially offset by a decrease in the weighted-average interest rate on our Credit Facilities (as defined in the Liquidity and Capital Resources section below) resulting from decreases in the benchmark index interest rates and decreases to the applicable margin rates related to the amendments of our Credit Facilities in April 2025.

(d)The increase in share-based compensation expense was primarily attributable to incentive compensation awards issued in April 2025.

Net Investment Income

Net investment income for the three months ended June 30, 2025 increased 5% to $88.2 million, or $0.99 per share, compared to net investment income of $83.9 million, or $0.97 per share, in the corresponding period of 2024. The increase in net investment income per share reflects the impact of the increase in weighted-average shares outstanding for the three months ended June 30, 2025, primarily due to shares issued since the beginning of the comparable period of the prior year through our (i) at-the-market program (“ATM Program”), (ii) dividend reinvestment plan and (iii) equity incentive plans. The increase in net investment income on a per share basis also includes a $0.02 per share increase from items considered less consistent or non-recurring in nature, including a $0.03 per share increase in investment income and a $0.01 per share increase in deferred compensation expense.

Distributable Net Investment Income

Distributable net investment income for the three months ended June 30, 2025 increased 6% to $94.3 million, or $1.06 per share, compared to $88.9 million, or $1.03 per share, in the corresponding period of 2024. The increase in distributable net investment income was primarily due to (i) the increase in net investment income as discussed above, (ii) an increase in deferred compensation expense and (iii) an increase in share-based compensation expense. The increase in distributable net investment income per share reflects the impact of the increase in weighted-average shares outstanding for the three months ended June 30, 2025, as discussed above. The increase in distributable net investment income on a per share basis also includes a $0.03 per share increase in investment income considered less consistent or non-recurring in nature.

Net Realized Gain

The following table provides a summary of the primary components of the total net realized gain on investments of $52.4 million for the three months ended June 30, 2025.


	Three Months Ended June 30, 2025
	Full Exits			Partial Exits			Restructures			Other (a)		Total
	Net Gain/(Loss)		# of Investments	Net Gain/(Loss)		# of Investments	Net Gain/(Loss)		# of Investments	Net Gain/(Loss)		Net Gain/(Loss)
	(in thousands)
LMM portfolio	$	55,647	1	$	—	—	$	—	—	$	15	$	55,662
Private Loan portfolio	(3,300)		2	(163)		2	(6,165)		1	(183)		(9,811)
Middle Market portfolio	—		—	—		—	—		—	—		—
Other Portfolio	—		—	6,167		2	—		—	402		6,569
Short-term portfolio	—		—	—		—	—		—	—		—
Total net realized gain/(loss)	$	52,347	3	$	6,004	4	$	(6,165)	1	$	234	$	52,420

___________________________

(a)Other activity includes realized gains and losses from transactions involving seven portfolio companies which are not considered to be significant individually or in the aggregate.

142

Table of contents

Net Unrealized Depreciation

The following table provides a summary of the total net unrealized depreciation of $19.0 million for the three months ended June 30, 2025.


	Three Months Ended June 30, 2025
	LMM (a)		Private Loan		Middle Market		Other			Total
	(in thousands)
Accounting reversals of net unrealized (appreciation) depreciation recognized in prior periods due to net realized (gains / income) losses recognized during the current period	$	(56,744)	$	7,802	$	(167)	$	(6,569)		$	(55,678)
Net unrealized appreciation (depreciation) relating to portfolio investments	5,862		(3,441)		(2,222)		36,528		(b)	36,727
Total net unrealized appreciation (depreciation) relating to portfolio investments	$	(50,882)	$	4,361	$	(2,389)	$	29,959		$	(18,951)

___________________________

(a)Includes unrealized appreciation on 36 LMM portfolio investments and unrealized depreciation on 26 LMM portfolio investments.

(b)Includes $34.4 million of unrealized appreciation related to the External Investment Manager.

Income Taxes

Main Street’s income taxes include excise tax expense at MSCC and federal and state income and other tax expenses at the Taxable Subsidiaries. MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds and Structured Subsidiaries, which are treated as disregarded entities for tax purposes. As a result of its investment activities and dividend policy and activities, MSCC incurs federal excise tax on its estimated undistributed taxable income. The Taxable Subsidiaries incur federal and state income and other taxes related to net investment income resulting from the Taxable Subsidiaries’ investment activities. The excise tax expense increase is due to changes in our estimated undistributed taxable income at the RIC, which is taxed at a 4% rate. The net investment income related federal and state income and other tax expenses increase is due to increases in taxable net investment income at the Taxable Subsidiaries.

The Taxable Subsidiaries also incur taxes on realized gains (losses) and unrealized appreciation (depreciation). These taxes will change over time due to changes in the valuations of our portfolio investments and due to realized gains and losses on our investments owned by the Taxable Subsidiaries.

Net Increase in Net Assets Resulting from Operations

The net increase in net assets resulting from operations for the three months ended June 30, 2025 was $122.5 million, or $1.37 per share, compared to $102.7 million, or $1.19 per share, during the three months ended June 30, 2024. The tables above provide a summary of the reasons for the change in net increase in net assets resulting from operations for the three months ended June 30, 2025 as compared to the three months ended June 30, 2024.

143

Table of contents

Comparison of the six months ended June 30, 2025 and 2024

Set forth below is a comparison of the results of operations, and a reconciliation of net investment income to distributable net investment income, for the six months ended June 30, 2025 and 2024. All prior period net investment income, net investment income per share, distributable net investment income and distributable net investment income per share amounts presented in this section have been retrospectively adjusted to conform to the current presentation. See Note A.3. — Organization and Basis of Presentation — Revisions to the Presentation of Previously Issued Financial Statements for details.


	Six Months Ended June 30,				Net Change
	2025		2024		Amount		%
	(in thousands)
Total investment income	$	281,019	$	263,759	$	17,260	7	%
Total expenses	(97,875)		(86,653)		(11,222)		13	%
Net investment income before taxes	183,144		177,106		6,038		3	%
Excise tax expense	(2,159)		(1,193)		(966)		81	%
Federal and state income and other tax expenses	(6,905)		(5,583)		(1,322)		24	%
Net investment income	174,080		170,330		3,750		2	%
Net realized gain (loss) from investments	22,875		(8,954)		31,829		NM
Net unrealized appreciation from investments	44,239		63,693		(19,454)		NM
Income tax provision on net realized gain (loss) and unrealized appreciation	(2,578)		(15,234)		12,656		NM
Net increase in net assets resulting from operations	$	238,616	$	209,835	$	28,781	14	%


	Six Months Ended June 30,				Net Change
	2025		2024		Amount		%
	(in thousands, except per share amounts)
Net investment income	$	174,080	$	170,330	$	3,750	2	%
Share‑based compensation expense	10,258		8,986		1,272		14	%
Deferred compensation expense	925		565		360		NM
Distributable net investment income (a)	$	185,263	$	179,881	$	5,382	3	%
Net investment income per share—Basic and diluted	$	1.96	$	1.99	$	(0.03)	(2)	%
Distributable net investment income per share—Basic and diluted (a)	$	2.08	$	2.10	$	(0.02)	(1)	%

____________________

NM Net change % not meaningful

144

Table of contents

Investment Income

Total investment income for the six months ended June 30, 2025 was $281.0 million, a 7% increase from the $263.8 million of total investment income for the corresponding period of 2024. The following table provides a summary of the changes in the comparable period activity.


	Six Months Ended June 30,				Net Change
	2025		2024		Amount		%
	(in thousands)
Interest income	$	198,874	$	200,136	$	(1,262)	(1)	%	(a)
Dividend income	73,871		49,479		24,392		49	%	(b)
Fee income	8,274		14,144		(5,870)		(42)	%	(c)
Total investment income	$	281,019	$	263,759	$	17,260	7	%	(d)

____________________

(a)The decrease in interest income was primarily attributable to (i) an increase in investments on non-accrual status and (ii) a decrease in interest rates on floating rate Investment Portfolio debt investments primarily resulting from decreases in benchmark index rates, partially offset by higher average levels of income producing Investment Portfolio debt investments.

(b)The increase in dividend income was primarily a result of (i) an increase of $24.6 million in dividend income from our LMM portfolio companies and (ii) an increase $1.8 million in dividend income from our Private Loan portfolio companies, partially offset by (i) a decrease of $1.0 million in dividend income from our External Investment Manager and (ii) a decrease of $0.9 million in dividend income from our Other Portfolio investments.

(c)The decrease in fee income was primarily related to (i) a $4.0 million decrease from lower exit, prepayment and amendment activity and (ii) a $1.9 million decrease in fees related to decreased investment activity.

(d)The increase in total investment income includes a net decrease of $2.1 million in certain income considered less consistent or non-recurring, including a $4.2 million decrease in such fee income, partially offset by (i) a $1.9 million increase in such dividend income and (ii) a $0.2 million increase in such interest income from accelerated prepayment, repricing and other activity related to certain Investment Portfolio debt investments.

145

Table of contents

Expenses

Total expenses for the six months ended June 30, 2025 were $97.9 million, a 13% increase from the $86.7 million in the corresponding period of 2024. The following table provides a summary of the changes in the comparable period activity.


	Six Months Ended June 30,				Net Change
	2025		2024		Amount		%
	(in thousands)
Cash compensation	$	23,228	$	23,016	$	212	1	%
Deferred compensation plan expense	925		565		360		NM
Compensation	24,153		23,581		572		2	%
General and administrative	11,005		9,595		1,410		15	%	(a)
Interest	63,687		55,937		7,750		14	%	(b)
Share-based compensation	10,258		8,986		1,272		14	%	(c)
Gross expenses	109,103		98,099		11,004		11	%
Expenses allocated to the External Investment Manager	(11,228)		(11,446)		218		(2)	%
Total expenses	$	97,875	$	86,653	$	11,222	13	%

____________________

(a)The increase in general and administrative expense was primarily attributable to increased expenses related to business development activities and professional fees.

(b)The increase in interest expense was primarily related to (i) an increase in average borrowings outstanding used to fund a portion of the growth of our Investment Portfolio and (ii) an increased weighted-average interest rate on our debt obligations resulting from the issuance of the March 2029 Notes and the June 2027 Notes and the repayment at maturity of the May 2024 Notes (each as defined in the Liquidity and Capital Resources section below), partially offset by a decreased average interest rate on our Credit Facilities due to decreases in benchmark index rates and a decrease to the applicable margin rates related to the amendments of our Credit Facilities in April 2025.

(c)The increase in share-based compensation expense was primarily attributable to incentive compensation awards issued in April 2025.

Net Investment Income

Net investment income for the six months ended June 30, 2025 increased 2% to $174.1 million, or $1.96 per share, compared to net investment income of $170.3 million, or $1.99 per share, for the corresponding period of 2024. The decrease in net investment income per share reflects the impact of the increase in weighted-average shares outstanding for the six months ended June 30, 2025, primarily due to shares issued through our (i) ATM Program, (ii) dividend reinvestment plan and (iii) equity incentive plans, in each case over the last twelve months. The decrease in net investment income on a per share basis includes a $0.03 per share decrease in investment income considered less consistent or non-recurring in nature.

Distributable Net Investment Income

Distributable net investment income for the six months ended June 30, 2025 increased 3% to $185.3 million, or $2.08 per share, compared with $179.9 million, or $2.10 per share, in the corresponding period of 2024. The decrease in distributable net investment income per share reflects the impact of the increase in weighted-average shares outstanding for the six months ended June 30, 2025, as discussed above. The decrease in distributable net investment income on a per share basis includes a $0.03 per share decrease in investment income considered less consistent or non-recurring in nature.

146

Table of contents

Net Realized Gain

The following table provides a summary of the primary components of the total net realized gain on investments of $22.9 million for the six months ended June 30, 2025.


	Six Months Ended June 30, 2025
	Full Exits			Partial Exits			Restructures			Other (a)		Total
	Net Gain/(Loss)		# of Investments	Net Gain/(Loss)		# of Investments	Net Gain/(Loss)		# of Investments	Net Gain/(Loss)		Net Gain/(Loss)
	(dollars in thousands)
LMM portfolio	$	55,647	1	$	—	—	$	—	—	$	39	$	55,686
Private Loan portfolio	2,459		4	(163)		2	(21,453)		3	(152)		(19,309)
Middle Market portfolio	(16,264)		1	(1,156)		2	(3,442)		1	831		(20,031)
Other Portfolio	—		—	6,167		2	—		—	587		6,754
Short-term portfolio	—		—	—		—	—		—	(225)		(225)
Total net realized gain (loss)	$	41,842	6	$	4,848	6	$	(24,895)	4	$	1,080	$	22,875

____________________

(a)Other activity includes realized gains and losses from transactions involving 14 portfolio companies which are not considered to be significant individually or in the aggregate.

Net Unrealized Appreciation

The following table provides a summary of the total net unrealized appreciation of $44.2 million for the six months ended June 30, 2025:


	Six Months Ended June 30, 2025
	LMM (a)		Private Loan		Middle Market		Other			Total
	(in thousands)
Accounting reversals of net unrealized (appreciation) depreciation recognized in prior periods due to net realized (gains / income) losses recognized during the current period	$	(57,356)	$	16,643	$	20,695	$	(6,754)		$	(26,772)
Net unrealized appreciation (depreciation) relating to portfolio investments	56,144		(7,981)		(6,433)		29,281		(b)	71,011
Total net unrealized appreciation (depreciation) relating to portfolio investments	$	(1,212)	$	8,662	$	14,262	$	22,527		$	44,239

____________________

(a)Includes unrealized appreciation on 38 LMM portfolio investments and unrealized depreciation on 31 LMM portfolio investments.

(b)Other includes (i) $26.6 million of unrealized appreciation relating to the External Investment Manager.

Income Taxes

147

Table of contents

Net Increase in Net Assets Resulting from Operations

The net increase in net assets resulting from operations for the six months ended June 30, 2025 was $238.6 million, or $2.68 per share, compared with $209.8 million, or $2.45 per share, during the six months ended June 30, 2024. The tables above provide a summary of the reasons for the change in net increase in net assets resulting from operations for the six months ended June 30, 2025 as compared to the six months ended June 30, 2024.

LIQUIDITY AND CAPITAL RESOURCES

Cash Flows

For the six months ended June 30, 2025, we realized a net increase in cash and cash equivalents of $8.7 million, which is the net result of $82.1 million of cash provided by our operating activities and $73.4 million of cash used in our financing activities.

The $82.1 million of cash provided by our operating activities resulted primarily from (i) cash proceeds totaling $573.3 million from the sales and repayments of debt investments and sales and return of capital from equity investments and (ii) cash flows that we generated from the operating profits earned totaling $168.7 million, which is our distributable net investment income, excluding the non-cash effects of the accretion of unearned income, payment-in-kind interest income, cumulative dividends and the amortization expense for deferred financing costs, partially offset by (i) cash uses totaling $646.0 million for the funding of new and follow-on portfolio investments and (ii) $14.3 million in cash uses related to other assets and liabilities.

The $73.4 million of cash used in our financing activities principally consisted of (i) $168.1 million in dividends paid to our stockholders, (ii) $10.0 million in purchases of vested stock for employee payroll tax withholdings and (iii) $4.4 million in deferred financing costs, partially offset by (i) $93.0 million in net borrowings from our Credit Facilities and (ii) $16.0 million in net cash proceeds from equity offerings from our ATM Program.

Capital Resources

As of June 30, 2025, we had $87.0 million in cash and cash equivalents and $1.264 billion of unused capacity under our Credit Facilities (as defined below) which we maintain to support our investment and operating activities. As of June 30, 2025, our NAV totaled $2.9 billion, or $32.30 per share.

As of June 30, 2025, we had $301.0 million outstanding and $840.1 million of undrawn commitments under our floating rate multi-year revolving credit facility (the “Corporate Facility”), and we, through MSCC Funding, had $176.0 million outstanding and $424.0 million of undrawn commitments under our special purpose vehicle revolving credit facility (the “SPV Facility” and, together with the Corporate Facility, the “Credit Facilities”), both of which we estimated approximated fair value. Availability under our Credit Facilities is subject to certain leverage and borrowing base limitations, various covenants, reporting requirements and other customary requirements for similar credit facilities.

In April 2025, we entered into an amendment to our Corporate Facility to, among other things: (i) decrease the interest rate to the applicable Term Secured Overnight Financing Rate (“SOFR”) plus a credit spread adjustment of 0.10% plus (a) 1.775% prior to satisfying certain step-down conditions or (b) 1.65% after satisfying certain step-down conditions, (ii) increase the revolving commitments to $1.145 billion, (iii) increase the accordion feature providing us with the right to request increases in commitments under the facility from new and existing lenders on the same terms and conditions as the existing commitments to up to a total of $1.718 billion and (iv) extend the revolving period and final maturity date through April 2029 and to April 2030, respectively.

In April 2025, we entered into an amendment to our SPV Facility to, among other things: (i) decrease the interest rate to the applicable SOFR plus an applicable margin of (a) 1.95% during the revolving period (from 2.35%), (b) 2.075% for the first year following the end of the revolving period (from 2.475%) and (c) 2.20% for the second year following the end of the revolving period (from 2.60%), (ii) extend the revolving period from through September 2027 to through September 2028, (iii) extend the final maturity date from September 2029 to September 2030 and (iv) decrease the unused fee to 0.40% (from 0.50%) on the unused amount up to 50% (from 35%) of the commitment amount.

For further information on our Credit Facilities, including key terms and financial covenants, refer to Note E — Debt included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

In January 2021, we issued $300.0 million in aggregate principal amount of 3.00% unsecured notes due July 14, 2026 (the “July 2026 Notes”). In October 2021, we issued an additional $200.0 million in aggregate principal amount of the July 2026 Notes. The outstanding aggregate principal amount of the July 2026 Notes was $500.0 million as of both June 30, 2025 and December 31, 2024.

148

Table of contents

In June 2024, we issued $300.0 million in aggregate principal amount of 6.50% unsecured notes due June 4, 2027 (the “June 2027 Notes”). In September 2024, we issued an additional $100.0 million in aggregate principal amount of the June 2027 Notes at a public offering price of 102.134% resulting in a yield-to-maturity of 5.617% on such issuance. The June 2027 Notes issued in September 2024 have identical terms as, and are a part of a single series with, the June 2027 Notes issued in June 2024. The outstanding aggregate principal amount of the June 2027 Notes was $400.0 million and bear interest at a rate of 6.50% per year with a yield-to-maturity of approximately 6.34% as of both June 30, 2025 and December 31, 2024.

In January 2024, we issued $350.0 million in aggregate principal amount of 6.95% unsecured notes due March 1, 2029 (the “March 2029 Notes”). The outstanding aggregate principal amount of the March 2029 Notes was $350.0 million as of both June 30, 2025 and December 31, 2024.

Through the Funds, we have the ability to issue SBIC debentures guaranteed by the SBA at favorable interest rates and favorable terms and conditions. Under existing SBIC regulations, SBA-approved SBICs under common control have the ability to issue debentures guaranteed by the SBA up to a regulatory maximum amount of $350.0 million. Under existing SBA-approved commitments, we had $350.0 million of outstanding SBIC debentures guaranteed by the SBA as of June 30, 2025 through our wholly-owned SBICs, which bear a weighted-average annual fixed interest rate of 3.3%, paid semiannually, and mature ten years from issuance. The first maturity related to our SBIC debentures occurs in March 2027, and the weighted-average remaining duration is 5.1 years as of June 30, 2025. Debentures guaranteed by the SBA have fixed interest rates that equal prevailing 10-year Treasury Note rates plus a market spread and have a maturity of ten years with interest payable semiannually. The principal amount of the debentures is not required to be paid before maturity, but may be pre-paid at any time with no prepayment penalty. We expect to maintain SBIC debentures under the SBIC program in the future, subject to periodic repayments and borrowings, in an amount up to the regulatory maximum amount for affiliated SBIC funds.

In December 2022, we issued $100.0 million in aggregate principal amount of 7.84% Series A unsecured notes due December 23, 2025 (the “December 2025 Notes”). In February 2023, we issued an additional $50.0 million in aggregate principal amount of the December 2025 Notes bearing interest at a fixed rate of 7.53% per year. The outstanding aggregate principal amount of the December 2025 Notes as of both June 30, 2025 and December 31, 2024 was $150.0 million.

In May 2024, we repaid the entire $450.0 million principal amount of the issued and outstanding 5.20% unsecured notes (the “May 2024 Notes”).

We maintain the ATM Program with certain selling agents through which we can sell shares of our common stock by means of at-the-market offerings from time to time. During the six months ended June 30, 2025, we sold 280,730 shares of our common stock at a weighted-average price of $57.47 per share and raised $16.1 million of gross proceeds under the ATM Program. Net proceeds were $15.8 million after commissions to the selling agents on shares sold and offering costs. As of June 30, 2025, sales transactions representing 7,482 shares had not settled and thus were not issued and not included in shares issued and outstanding on the Consolidated Balance Sheets but are included as outstanding on the Consolidated Statement of Changes in Net Assets, in the weighted-average shares outstanding in the Consolidated Statements of Operations and in the shares used to calculate the NAV per share. In March 2025, we entered into new distribution agreements to sell up to 20,000,000 shares through the ATM Program. As of June 30, 2025, 19,790,632 shares remained available for sale under the ATM Program.

During the year ended December 31, 2024, we sold 2,489,275 shares of our common stock at a weighted-average price of $49.75 per share and raised $123.8 million of gross proceeds under the ATM Program. Net proceeds were $122.2 million after commissions to the selling agents on shares sold and offering costs.

We anticipate that we will continue to fund our investment activities through existing cash and cash equivalents, cash flows generated through our ongoing operating activities, utilization of available borrowings under our Credit Facilities, and a combination of future issuances of debt and equity capital. Our primary uses of funds will be investments in portfolio companies, operating expenses, cash distributions to holders of our common stock and repayments of note and debenture obligations as they come due.

We periodically invest excess cash balances into marketable securities and short-term investments. The primary investment objective of marketable securities and short-term investments is to generate incremental cash returns on excess cash balances prior to utilizing those funds for investment in our LMM and Private Loan portfolio investments. Marketable securities generally consist of money market funds and certificates of deposit with financial institutions. Short-term portfolio investments consist primarily of investments in secured debt investments and independently rated debt investments.

149

Table of contents

If our common stock trades below our NAV per share, we will generally not be able to issue additional common stock at the market price, unless our stockholders approve such a sale and our Board of Directors makes certain determinations. We did not seek stockholder authorization to sell shares of our common stock below the then current NAV per share of our common stock at our 2025 Annual Meeting of Stockholders, and have not sought such authorization since 2012, because our common stock price per share has generally traded significantly above the NAV per share of our common stock since 2011. We would therefore need future approval from our stockholders to issue shares below the then current NAV per share.

In order to satisfy the Code requirements applicable to a RIC, we intend to distribute to our stockholders, after consideration and application of our ability under the Code to carry forward certain excess undistributed taxable income from one tax year into the next tax year, substantially all of our taxable income.

In accordance with the 1940 Act, we are allowed to borrow amounts such that our asset coverage ratio, or BDC asset coverage ratio, of our total assets to our total senior securities, which include borrowings and any preferred stock we may issue in the future, is at least 150% after such borrowing. In January 2008, we received exemptive relief from the SEC to exclude SBA-guaranteed debt securities issued by the Funds and any other wholly-owned subsidiaries of ours which operate as SBICs from the BDC asset coverage ratio which, in turn, enables us to fund more investments with debt capital. Upon receipt of stockholder approval in accordance with the 1940 Act, our BDC asset coverage ratio was reduced from 200% to 150% effective May 3, 2022. As of June 30, 2025, our BDC asset coverage ratio was 253%.

Although we have been able to secure access to additional liquidity, including through our Credit Facilities, public and private debt issuances, leverage available through the SBIC program and equity offerings, there is no assurance that debt or equity capital will be available to us in the future on favorable terms, or at all.

Recently Issued or Adopted Accounting Standards

From time to time, new accounting pronouncements are issued by the FASB or other standards setting bodies that are adopted by us as of the specified effective date. We believe that the impact of recently issued standards and any that are not yet effective will not have a material impact on our consolidated financial statements upon adoption. For a description of recently issued or adopted accounting standards, see Note B.15. — Summary of Significant Accounting Policies — Recently Issued or Adopted Accounting Standards included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

Inflation

Inflation has not historically had a significant effect on our results of operations in any of the reporting periods presented herein. However, our portfolio companies have experienced, specifically including over the last few years, as a result of recent geopolitical events, uncertainty with respect to the imposition of tariffs on and trade disputes with certain countries, supply chain and labor issues, and may continue to experience, the increasing impacts of inflation on their operating results, including periodic escalations in their costs for labor, raw materials and third-party services and required energy consumption. These issues and challenges related to inflation are receiving significant attention from our investment teams and the management teams of our portfolio companies as we work to manage these growing challenges. Prolonged or more severe impacts of inflation to our portfolio companies could continue to affect their operating profits and, thereby, increase their borrowing costs, and as a result negatively impact their ability to service their debt obligations and/or reduce their available cash for distributions. In addition, these factors could have a negative effect on the fair value of our investments in these portfolio companies. The combined impacts therefrom in turn could negatively affect our results of operations.

Off-Balance Sheet Arrangements

We may be a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financial needs of our portfolio companies. These instruments include commitments to extend credit and fund equity capital and involve, to varying degrees, elements of liquidity and credit risk in excess of the amount recognized in the Consolidated Balance Sheets. As of June 30, 2025, we had a total of $307.5 million in outstanding commitments comprised of (i) 73 investments with commitments to fund revolving loans that had not been fully drawn or term loans with additional commitments not yet funded and (ii) ten investments with equity capital commitments that had not been fully called.

150

Table of contents

Contractual Obligations

As of June 30, 2025, the future fixed commitments for cash payments in connection with the July 2026 Notes, the June 2027 Notes, the March 2029 Notes, SBIC debentures, the December 2025 Notes and rent obligations under our office lease for each of the next five years and thereafter are as follows.


	2025		2026		2027		2028		2029		Thereafter		Total
	(in thousands)
July 2026 Notes	$	—	$	500,000	$	—	$	—	$	—	$	—	$	500,000
Interest due on July 2026 Notes	7,500		15,000		—		—		—		—		22,500
June 2027 Notes	—		—		400,000		—		—		—		400,000
Interest due on June 2027 Notes	13,000		26,000		13,000		—		—		—		52,000
March 2029 Notes	—		—		—		—		350,000		—		350,000
Interest due on March 2029 Notes	12,162		24,325		24,325		24,325		12,163		—		97,300
SBIC debentures	—		—		75,000		75,000		—		200,000		350,000
Interest due on SBIC debentures	5,651		11,394		10,678		8,239		6,197		24,577		66,736
December 2025 Notes	150,000		—		—		—		—		—		150,000
Interest due on December 2025 Notes	5,835		—		—		—		—		—		5,835
Operating Lease Obligation (1)	578		1,193		1,214		1,235		1,256		5,576		11,052
Total	$	194,726	$	577,912	$	524,217	$	108,799	$	369,616	$	230,153	$	2,005,423

___________________________

(1)Operating Lease Obligation means a rent payment obligation under a lease classified as an operating lease and disclosed pursuant to ASC 842, as may be modified or supplemented.

As of June 30, 2025, we had $301.0 million in borrowings outstanding under our Corporate Facility, which is scheduled to mature in April 2030. As of June 30, 2025, we, through MSCC Funding, had $176.0 million in borrowings outstanding under our SPV Facility, which is scheduled to mature in September 2030.

Related Party Transactions and Agreements

We have entered into agreements and transactions with the External Investment Manager, MSC Income, Private Loan Fund I and Private Loan Fund II, whereby we have made debt and equity investments and receive certain fees, expense reimbursements and investment income. See Note D — External Investment Manager and Note L — Related Party Transactions included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q for additional information regarding these related party transactions and agreements.

In addition, we have a deferred compensation plan, whereby non-employee directors and certain key employees may defer receipt of some or all of their fees and cash compensation, subject to certain limitations. See Note L — Related Party Transactions included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q for additional information regarding the deferred compensation plan.

Recent Developments

In August 2025, we declared a supplemental dividend of $0.30 per share payable in September 2025. This supplemental dividend is in addition to the previously announced regular monthly dividends that we declared of $0.255 per share for each month of July, August and September 2025 or total regular monthly dividends of $0.765 per share for the third quarter of 2025, resulting in total dividends declared for the third quarter of 2025 of $1.065 per share.

In August 2025, we also declared regular monthly dividends of $0.255 per share for each month of October, November and December of 2025. These regular monthly dividends equal a total of $0.765 per share for the fourth quarter of 2025, representing a 4.1% increase from the regular monthly dividends paid in the fourth quarter of 2024. Including the regular monthly and supplemental dividends declared for the third and fourth quarters of 2025, we will have paid $46.855 per share in cumulative dividends since our October 2007 initial public offering.

151

Table of contents

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are subject to financial market risks, including changes in interest rates, and changes in interest rates may affect both our interest expense on the debt outstanding under our Credit Facilities and our interest income from portfolio investments. Our risk management systems and procedures are designed to identify and analyze our risk, to set appropriate policies and limits and to continually monitor these risks. Our investment income will be affected by changes in various interest rate indices, including SOFR and Prime rates, to the extent that any debt investments include floating interest rates. See Risk Factors — Risks Related to our Business and Structure — We are subject to risks associated with the interest rate environment and changes in interest rates will affect our cost of capital, net investment income and the value of our investments. and Risk Factors — Risks Related to Leverage — Because we borrow money, the potential for gain or loss on amounts invested in us is magnified and may increase the risk of investing in us. included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024 for more information regarding risks associated with our debt investments and borrowings that utilize SOFR or Prime as a reference rate.

The majority of our debt investments are made with either fixed interest rates or floating rates that are subject to contractual minimum interest rates for the term of the investment. As of June 30, 2025, 66% of our debt Investment Portfolio (at cost) bore interest at floating rates, 96% of which were subject to contractual minimum interest rates. As of June 30, 2025, 79% of our debt obligations bore interest at fixed rates. Our interest expense will be affected by changes in the published SOFR in connection with our Credit Facilities; however, the interest rates on our outstanding July 2026 Notes, June 2027 Notes, March 2029 Notes, SBIC debentures and December 2025 Notes, which collectively comprise the majority of our outstanding debt, are fixed for the life of such debt. As of June 30, 2025, we had not entered into any interest rate hedging arrangements. Due to our limited use of derivatives, we have claimed an exclusion from the definition of the term “commodity pool operator” under the Commodity Exchange Act and, therefore, are not subject to registration or regulation as a pool operator under such Act. The Company expects to operate as a “limited derivatives user” under Rule 18f-4 under the 1940 Act. In addition, the investment management and other services provided by our External Investment Manager also involve floating rate debt investments and floating rate debt obligations, and as a result the incentive fees earned by our External Investment Manager, and the corresponding benefits to our net investment income contributions from our External Investment Manager, are subject to change based upon any changes in floating benchmark index rates.

152

Table of contents

The following table shows the approximate annualized increase or decrease in the components of net investment income due to hypothetical base rate changes in interest rates, assuming no changes in our investments and borrowings, or in the investments and borrowings related to the investment management and other services provided by our External Investment Manager, in both cases as of June 30, 2025.


Basis Point Change	Increase (Decrease) in Interest Income		(Increase) Decrease in Interest Expense		Increase (Decrease) in Net Investment Income from the External Investment Manager (1)		Increase (Decrease) in Net Investment Income		Increase (Decrease) in Net Investment Income per Share
	(dollars in thousands, except per share amounts)
(200)	$	(42,342)	$	9,540	$	(855)	$	(33,657)	$	(0.38)
(175)	(36,971)		8,348		(739)		(29,362)		(0.33)
(150)	(31,599)		7,155		(623)		(25,067)		(0.28)
(125)	(26,213)		5,963		(504)		(20,754)		(0.23)
(100)	(20,823)		4,770		(384)		(16,437)		(0.18)
(75)	(15,485)		3,578		(265)		(12,172)		(0.14)
(50)	(10,291)		2,385		(152)		(8,058)		(0.09)
(25)	(5,146)		1,193		(38)		(3,991)		(0.04)
25	5,146		(1,193)		187		4,140		0.05
50	10,291		(2,385)		438		8,344		0.09
75	15,438		(3,578)		551		12,411		0.14
100	20,590		(4,770)		665		16,485		0.18
125	25,742		(5,963)		778		20,557		0.23
150	30,895		(7,155)		892		24,632		0.28
175	36,047		(8,348)		1,005		28,704		0.32
200	41,199		(9,540)		1,119		32,778		0.37

___________________________

(1)Main Street’s total contribution from the External Investment Manager is based on the performance of assets managed by the External Investment Manager (as discussed in Note D — External Investment Manager included in Item 1. Consolidated Financial Statements of this Quarterly Report on Form 10-Q), and any related cost of debt obligations related to such managed assets, which may fluctuate depending on changes in interest rates.

Although we believe that this analysis is indicative of the impact of interest rate changes to our net investment income as of June 30, 2025, the analysis does not take into consideration future changes in the credit market, credit quality or other business or economic developments that could affect our net investment income. Accordingly, we can offer no assurances that actual results would not differ materially from the analysis above. The hypothetical results assume that all SOFR and Prime rate changes would be effective on the first day of the period. However, the contractual SOFR and Prime rate reset dates would vary throughout the period. The majority of our investments, and the investments managed by our External Investment Manager, are based on contracts which reset quarterly, while our Credit Facilities, and the debt obligations related to the assets managed by our External Investment Manager, reset monthly. The hypothetical results would also be impacted by the changes in the amount of outstanding debt under our Credit Facilities (with an increase (decrease) in the debt outstanding under the Credit Facilities resulting in an (increase) decrease in the hypothetical interest expense).

Item 4. CONTROLS AND PROCEDURES

As of the end of the period covered by this quarterly report on Form 10-Q, we carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer, President, Chief Financial Officer, General Counsel and Chief Accounting Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15 of the Exchange Act). Based on that evaluation, our Chief Executive Officer, President, Chief Financial Officer, General Counsel and Chief Accounting Officer have concluded that our current disclosure controls and procedures are effective in timely alerting them of material information relating to us that is required to be disclosed in the reports we file or submit under the Exchange Act. There have been no changes in our internal control over financial reporting that occurred during the quarter ended June 30, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

153

Table of contents

PART II—OTHER INFORMATION

Item 1. LEGAL PROCEEDINGS

We may, from time to time, be involved in litigation arising out of our operations in the normal course of business or otherwise. Furthermore, third parties may seek to impose liability on us in connection with the activities of our portfolio companies. While the outcome of any current legal proceedings cannot at this time be predicted with certainty, we do not expect any current matters will materially affect our financial condition or results of operations; however, there can be no assurance whether any pending or future legal proceedings will have a material adverse effect on our financial condition or results of operations in any future reporting period.

Item 1A. RISK FACTORS

You should carefully consider the risks described below and all other information contained in this Quarterly Report on Form 10-Q, including our interim consolidated financial statements and the related notes thereto, before making a decision to purchase our securities. The risks and uncertainties described below are not the only ones facing us. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may have a material adverse effect on our business, financial condition and/or operating results, as well as the market price of our securities.

In addition to the other information set forth in this report, you should carefully consider the risk factors described in Item 1A. Risk Factors in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024 that we filed with the SEC on February 28, 2025 and in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2025 that we filed with the SEC on May 9, 2025, which could materially affect our business, financial condition and/or operating results.

There are no material changes to the risk factors as previously disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024 and in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2025.

Item 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

During the three months ended June 30, 2025, we issued 167,705 shares of our common stock under our dividend reinvestment plan. These issuances were not subject to the registration requirements of the Securities Act of 1933, as amended. The aggregate value of the shares of common stock issued during the three months ended June 30, 2025 under the dividend reinvestment plan was $9.4 million.

Upon vesting of restricted stock awarded pursuant to our employee equity compensation plan, shares may be withheld to meet applicable tax withholding requirements. Any withheld shares are treated as common stock purchases by the Company in our consolidated financial statements as they reduce the number of shares received by employees upon vesting (see “Purchase of vested stock for employee payroll tax withholding” in the Consolidated Statements of Changes in Net Assets for share amounts withheld).

Item 5. OTHER INFORMATION

Rule 10b5-1 Trading Plans

During the fiscal quarter ended June 30, 2025, none of our directors or officers adopted or terminated any contract, instruction or written plans for the purchase or sale of our securities to satisfy the affirmative defense conditions of Exchange Act Rule 10b5-1(c) or any “non-Rule 10b5-1 trading arrangement.”

154

Table of contents

Item 6. EXHIBITS

Listed below are the exhibits which are filed as part of this report (according to the number assigned to them in Item 601 of Regulation S-K):


Exhibit Number						Description of Exhibit
10.1						Seventh Amendment to Third Amended and Restated Credit Agreement, dated as of April 30, 2025, by and among Main Street Capital Corporation, the guarantors party thereto, Truist Bank, as administrative agent, and the lenders party thereto (previously filed as Exhibit 10.1 to Main Street Capital Corporation’s Current Report on Form 8-K filed on May 1, 2025 (File No. 814-00746)).
10.2						Third Amendment to Credit Agreement, dated as of April 24 2025, by and among MSCC Funding I, LLC, as the borrower, Main Street Capital Corporation, as the collateral manager, the lenders from time to time party thereto, Truist Bank, as administrative agent and swingline lender, Citibank, N.A., as collateral agent, document custodian and custodian, Virtus Group, L.P., as collateral administrator, and Western Alliance Trust Company, N.A., as successor collateral agent, successor document custodian, successor custodian and successor collateral administrator (previously filed as Exhibit 10.1 to Main Street Capital Corporation’s Current Report on Form 8-K filed on April 25, 2025 (File No. 814-00746)).
31.1*						Certification of Chief Executive Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934.
31.2*						Certification of Chief Financial Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934.
32.1**						Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350).
32.2**						Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350).
101*						The following financial information from our Quarterly Report on Form 10-Q for the second quarter of fiscal year 2025, filed with the SEC on August 8, 2025, formatted in Inline Extensible Business Reporting Language (iXBRL): (i) the Consolidated Balance Sheets as of June 30, 2025 and December 31, 2024, (ii) the Consolidated Statements of Operations for the three and six months ended June 30, 2025 and 2024, (iii) the Consolidated Statements of Changes in Net Assets for the three and six months ended June 30, 2025 and 2024, (iv) the Consolidated Statements of Cash Flows for the six months ended June 30, 2025 and 2024, (v) the Consolidated Schedule of Investments for the periods ended June 30, 2025 and December 31, 2024, (vi) the Notes to Consolidated Financial Statements and (vii) the Consolidated Schedule 12-14 for the six months ended June 30, 2025 and 2024.





104*						Cover Page Interactive Data File (embedded within the Inline XBRL document)

___________________________

* Filed herewith

** Furnished herewith

155

Table of contents

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.


			Main Street Capital Corporation

			/s/ DWAYNE L. HYZAK
Date: August 8, 2025			Dwayne L. Hyzak
			Chief Executive Officer
			(principal executive officer)

			/s/ RYAN R. NELSON
Date: August 8, 2025			Ryan R. Nelson
			Chief Financial Officer
			(principal financial officer)

			/s/ RYAN H. MCHUGH
Date: August 8, 2025			Ryan H. McHugh
			Chief Accounting Officer
			(principal accounting officer)

156

EX-31.1 2 main-q22025xexx311.htm EX-31.1 Document

Exhibit 31.1

CERTIFICATION PURSUANT TO

RULE 13a-14(a) and 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS AMENDED

I, Dwayne L. Hyzak, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2025 of Main Street Capital Corporation (the “registrant”);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated this August 8, 2025.


By:			/s/ DWAYNE L. HYZAK
			Dwayne L. Hyzak
			Chief Executive Officer

EX-31.2 3 main-q22025xexx312.htm EX-31.2 Document

Exhibit 31.2

CERTIFICATION PURSUANT TO

RULE 13a-14(a) and 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS AMENDED

I, Ryan R. Nelson, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2025 of Main Street Capital Corporation (the “registrant”);

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated this August 8, 2025.


By:			/s/ RYAN R. NELSON
			Ryan R. Nelson
			Chief Financial Officer

EX-32.1 4 main-q22025xexx321.htm EX-32.1 Document

Exhibit 32.1

Certification of Chief Executive Officer

Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350)

In connection with the accompanying Quarterly Report of Main Street Capital Corporation (the “Registrant”) on Form 10-Q for the quarterly period ended June 30, 2025 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Dwayne L. Hyzak, the Chief Executive Officer of the Registrant, hereby certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.


			/s/ DWAYNE L. HYZAK
			Name:			Dwayne L. Hyzak
			Date:			August 8, 2025

EX-32.2 5 main-q22025xexx322.htm EX-32.2 Document

Exhibit 32.2

Certification of Chief Financial Officer

Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350)

In connection with the accompanying Quarterly Report of Main Street Capital Corporation (the “Registrant”) on Form 10-Q for the quarterly period ended June 30, 2025 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Ryan R. Nelson, the Chief Financial Officer of the Registrant, hereby certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.


			/s/ RYAN R. NELSON
			Name:			Ryan R. Nelson
			Date:			August 8, 2025