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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 10-Q
(mark one)    
  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2024
OR
  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: 000-56598
logoa14.jpg
NORTHWESTERN ENERGY GROUP, INC.
(Exact name of registrant as specified in its charter)
Delaware   93-2020320
(State or other jurisdiction of
incorporation or organization)
  (I.R.S. Employer
Identification No.)
3010 W. 69th Street Sioux Falls South Dakota   57108
(Address of principal executive offices)   (Zip Code)
Registrant’s telephone number, including area code: 605-978-2900

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(s) Name of each exchange on which registered
Common stock NWE Nasdaq Stock Market LLC
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 x 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 (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x 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☐ No ☒

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date:

Common Stock, Par Value $0.01, 61,314,217 shares outstanding at October 25, 2024
1


NORTHWESTERN ENERGY GROUP
 
FORM 10-Q
 
INDEX
  Page
 
 
 
 


2


SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

On one or more occasions, we may make statements in this Quarterly Report on Form 10-Q regarding our assumptions, projections, expectations, targets, intentions or beliefs about future events. All statements other than statements of historical facts, included or incorporated by reference in this Quarterly Report, relating to our current expectations of future financial performance, continued growth, changes in economic conditions or capital markets and changes in customer usage patterns and preferences are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934.

Words or phrases such as “anticipates," “may," “will," “should," “believes," “estimates," “expects," “intends," “plans," “predicts," “projects," “targets," “will likely result," “will continue" or similar expressions identify forward-looking statements. Forward-looking statements involve risks and uncertainties, which could cause actual results or outcomes to differ materially from those expressed. We caution that while we make such statements in good faith and believe such statements are based on reasonable assumptions, including without limitation, our examination of historical operating trends, data contained in records and other data available from third parties, we cannot assure you that we will achieve our projections. Factors that may cause such differences include, but are not limited to:

•adverse determinations by regulators, as well as potential adverse federal, state, or local legislation or regulation, including costs of compliance with existing and future environmental requirements, and wildfire damages in excess of liability insurance coverage, could have a material effect on our liquidity, results of operations and financial condition;
•the impact of extraordinary external events and natural disasters, such as a wide-spread or global pandemic, geopolitical events, earthquake, flood, drought, lightning, weather, wind, and fire, could have a material effect on our liquidity, results of operations and financial condition;
•acts of terrorism, cybersecurity attacks, data security breaches, or other malicious acts that cause damage to our generation, transmission, or distribution facilities, information technology systems, or result in the release of confidential customer, employee, or Company information;
•supply chain constraints, recent high levels of inflation for product, services and labor costs, and their impact on capital expenditures, operating activities, and/or our ability to safely and reliably serve our customers;
•changes in availability of trade credit, creditworthiness of counterparties, usage, commodity prices, fuel supply costs or availability due to higher demand, shortages, weather conditions, transportation problems or other developments, may reduce revenues or may increase operating costs, each of which could adversely affect our liquidity and results of operations;
•unscheduled generation outages or forced reductions in output, maintenance or repairs, which may reduce revenues and increase operating costs or may require additional capital expenditures or other increased operating costs; and
•adverse changes in general economic and competitive conditions in the U.S. financial markets and in our service territories.

We have attempted to identify, in context, certain of the factors that we believe may cause actual future experience and results to differ materially from our current expectation regarding the relevant matter or subject area. In addition to the items specifically discussed above, our business and results of operations are subject to the uncertainties described under the caption “Risk Factors” which is part of the disclosure included in Part II, Item 1A of this Quarterly Report on Form 10-Q.

From time to time, oral or written forward-looking statements are also included in our reports on Forms 10-K, 10-Q and 8-K, Proxy Statements on Schedule 14A, press releases, analyst and investor conference calls, and other communications released to the public. We believe that at the time made, the expectations reflected in all of these forward-looking statements are and will be reasonable. However, any or all of the forward-looking statements in this Quarterly Report on Form 10-Q, our reports on Forms 10-K and 8-K, our other reports on Form 10-Q, our Proxy Statements on Schedule 14A and any other public statements that are made by us may prove to be incorrect. This may occur as a result of assumptions, which turn out to be inaccurate, or as a consequence of known or unknown risks and uncertainties. Many factors discussed in this Quarterly Report on Form 10-Q, certain of which are beyond our control, will be important in determining our future performance. Consequently, actual results may differ materially from those that might be anticipated from forward-looking statements. In light of these and other uncertainties, you should not regard the inclusion of any of our forward-looking statements in this Quarterly Report on Form 10-Q or other public communications as a representation by us that our plans and objectives will be achieved, and you should not place undue reliance on such forward-looking statements.

3


We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. However, your attention is directed to any further disclosures made on related subjects in our subsequent reports filed with the Securities and Exchange Commission (SEC) on Forms 10-K, 10-Q and 8-K and Proxy Statements on Schedule 14A.

Unless the context requires otherwise, references to “we,” “us,” “our,” “NorthWestern Energy Group,” “NorthWestern Energy,” and “NorthWestern” refer specifically to NorthWestern Energy Group, Inc. and its subsidiaries.
4


PART 1. FINANCIAL INFORMATION
 
ITEM 1.FINANCIAL STATEMENTS
 
NORTHWESTERN ENERGY GROUP

CONDENSED CONSOLIDATED STATEMENTS OF INCOME
 
(Unaudited)
 
(in thousands, except per share amounts)
 
  Three Months Ended September 30, Nine Months Ended September 30,
  2024 2023 2024 2023
Revenues  
Electric $ 306,478  $ 280,030  $ 909,798  $ 804,604 
Gas 38,683  41,060  230,634  261,530 
Total Revenues 345,161  321,090  1,140,432  1,066,134 
Operating expenses  
Fuel, purchased supply and direct transmission expense (exclusive of depreciation and depletion shown separately below) 87,888  88,943  339,089  322,013 
Operating and maintenance 55,866  53,240  167,415  163,941 
Administrative and general 34,924  29,355  106,650  94,058 
Property and other taxes 41,596  41,763  125,023  131,043 
Depreciation and depletion 56,954  52,159  170,630  157,787 
Total Operating Expenses 277,228  265,460  908,807  868,842 
Operating income 67,933  55,630  231,625  197,292 
Interest expense, net (33,397) (28,725) (96,251) (85,144)
Other income, net 9,116  4,127  19,595  12,926 
Income before income taxes 43,652  31,032  154,969  125,074 
Income tax benefit (expense) 3,167  (1,697) (11,410) (14,085)
Net Income $ 46,819  $ 29,335  $ 143,559  $ 110,989 
Average Common Shares Outstanding 61,302  60,442  61,286  60,011 
Basic Earnings per Average Common Share $ 0.76  $ 0.48  $ 2.34  $ 1.85 
Diluted Earnings per Average Common Share $ 0.76  $ 0.48  $ 2.34  $ 1.85 
Dividends Declared per Common Share $ 0.65  $ 0.64  $ 1.95  $ 1.92 
See Notes to Condensed Consolidated Financial Statements
 
5


NORTHWESTERN ENERGY GROUP

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
 
(Unaudited)
 
(in thousands)
 
Three Months Ended September 30, Nine Months Ended September 30,
  2024 2023 2024 2023
Net Income $ 46,819  $ 29,335  $ 143,559  $ 110,989 
Other comprehensive income, net of tax:
Foreign currency translation adjustment (7) (1) (10)
Postretirement medical liability adjustment —  (168) —  (502)
Reclassification of net losses on derivative instruments 113  113  339  339 
Total Other Comprehensive Income (Loss) 114  (62) 338  (173)
Comprehensive Income $ 46,933  $ 29,273  $ 143,897  $ 110,816 

See Notes to Condensed Consolidated Financial Statements
 
6


NORTHWESTERN ENERGY GROUP

CONDENSED CONSOLIDATED BALANCE SHEETS
 
(Unaudited)

(in thousands, except share data)
  September 30, 2024 December 31, 2023
ASSETS    
Current Assets:    
Cash and cash equivalents $ 2,527  $ 9,164 
Restricted cash 25,365  16,023 
Accounts receivable, net 144,186  212,257 
Inventories 121,568  114,539 
Regulatory assets 34,334  29,626 
Prepaid expenses and other 40,440  25,397 
      Total current assets  368,420  407,006 
Property, plant, and equipment, net 6,304,721  6,039,801 
Goodwill 357,586  357,586 
Regulatory assets 766,229  743,945 
Other noncurrent assets 57,118  52,314 
      Total Assets  $ 7,854,074  $ 7,600,652 
LIABILITIES AND SHAREHOLDERS' EQUITY    
Current Liabilities:    
Current maturities of finance leases $ 3,529  $ 3,338 
Current portion of long-term debt 299,918  99,950 
Short-term borrowings 100,000  — 
Accounts payable 93,748  124,340 
Accrued expenses and other 286,070  246,167 
Regulatory liabilities 30,001  61,103 
      Total current liabilities  813,266  534,898 
Long-term finance leases 2,798  5,461 
Long-term debt 2,567,940  2,684,635 
Deferred income taxes 640,082  600,520 
Noncurrent regulatory liabilities 665,360  657,452 
Other noncurrent liabilities 348,166  332,372 
      Total Liabilities  5,037,612  4,815,338 
Commitments and Contingencies (Note 10)
Shareholders' Equity:    
Common stock, par value $0.01; authorized 200,000,000 shares; issued and outstanding 64,803,949 and 61,308,009 shares, respectively; Preferred stock, par value $0.01; authorized 50,000,000 shares; none issued
648  648 
Treasury stock at cost (97,557) (97,926)
Paid-in capital 2,084,560  2,078,753 
Retained earnings 836,129  811,495 
Accumulated other comprehensive loss (7,318) (7,656)
Total Shareholders' Equity  2,816,462  2,785,314 
Total Liabilities and Shareholders' Equity $ 7,854,074  $ 7,600,652 

See Notes to Condensed Consolidated Financial Statements
7


NORTHWESTERN ENERGY GROUP
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)
(in thousands)
  Nine Months Ended September 30,
  2024 2023
OPERATING ACTIVITIES:    
Net income $ 143,559  $ 110,989 
Items not affecting cash:  
Depreciation and depletion 170,630  157,787 
Amortization of debt issuance costs, discount and deferred hedge gain 3,490  3,997 
Stock-based compensation costs 5,291  5,119 
Equity portion of allowance for funds used during construction (15,371) (12,530)
Gain on disposition of assets (14) (27)
Impairment of alternative energy storage investment 4,159  — 
Deferred income taxes 7,128  (13,281)
Changes in current assets and liabilities:
Accounts receivable 68,071  96,910 
Inventories (7,030) (11,721)
Other current assets (15,043) 389 
Accounts payable (14,235) (60,815)
Accrued expenses and other 39,928  65,058 
Regulatory assets (4,708) 94,069 
Regulatory liabilities (31,102) 10,588 
Other noncurrent assets and liabilities (10,849) (19,610)
Cash Provided by Operating Activities 343,904  426,922 
INVESTING ACTIVITIES:    
Property, plant, and equipment additions (400,511) (407,170)
Investment in equity securities (4,599) (3,804)
Cash Used in Investing Activities (405,110) (410,974)
FINANCING ACTIVITIES:    
Proceeds from issuance of common stock, net —  73,613 
Dividends on common stock (118,925) (115,048)
Issuance of long-term debt 215,000  300,000 
Issuances of short-term borrowings 100,000  — 
Repayments on long-term debt (100,000) — 
Line of credit repayments, net (32,000) (273,000)
Other financing activities, net (164) (2,336)
Cash Provided by (Used in) Financing Activities 63,911  (16,771)
Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash 2,705  (823)
Cash, Cash Equivalents, and Restricted Cash, beginning of period 25,187  22,463 
Cash, Cash Equivalents, and Restricted Cash, end of period  $ 27,892  $ 21,640 
Supplemental Cash Flow Information:    
Cash (received) paid during the period for:    
Income taxes $ (4,469) $ 3,204 
Interest 92,562  64,533 
Significant non-cash transactions:    
Capital expenditures included in accounts payable 25,966  43,389 
Refinancing of Pollution Control Revenue Refunding Bonds —  144,660 
See Notes to Condensed Consolidated Financial Statements
8


NORTHWESTERN ENERGY GROUP

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

(Unaudited)

(in thousands, except per share data)

Three Months Ended September 30,
Number of Common Shares Number of Treasury Shares Common Stock Treasury Stock Paid in Capital Retained Earnings Accumulated Other Comprehensive Loss  Total Shareholders' Equity
Balance at June 30, 2023 63,518  3,527  $ 635  $ (98,302) $ 2,015,367  $ 776,983  $ (7,959) $ 2,686,724 
Net income —  —  —  —  —  29,335  —  29,335 
Foreign currency translation adjustment, net of tax —  —  —  —  —  —  (7) (7)
Reclassification of net losses on derivative instruments from OCI to net income, net of tax —  —  —  —  —  —  113  113 
Postretirement medical liability adjustment, net of tax —  —  —  —  —  —  (168) (168)
Stock-based compensation —  —  —  —  239  —  —  239 
Issuance of shares 1,244  (7) 13  180  62,948  —  —  63,141 
Dividends on common stock ($0.640 per share)
—  —  —  —  —  (38,963) —  (38,963)
Balance at September 30, 2023 64,762 3,520 $ 648  $ (98,122) $ 2,078,554  $ 767,355  $ (8,021) $ 2,740,414 
Balance at June 30, 2024 64,803 3,504 $ 648  $ (97,776) $ 2,082,857  $ 828,960  $ (7,432) $ 2,807,257 
Net income —  —  —  —  —  46,819  —  46,819 
Foreign currency translation adjustment, net of tax —  —  —  —  —  — 
Reclassification of net losses on derivative instruments from OCI to net income, net of tax —  —  —  —  —  —  113  113 
Stock-based compensation —  —  —  1,481  —  —  1,481 
Issuance of shares —  (8) —  219  222  —  —  441 
Dividends on common stock ( $0.650 per share)
—  —  —  —  —  (39,650) —  (39,650)
Balance at September 30, 2024 64,804 3,496 648 (97,557) 2,084,560 836,129 (7,318) 2,816,462

9


Nine Months Ended September 30,
Number of Common Shares Number of Treasury Shares Common Stock Treasury Stock Paid in Capital Retained Earnings Accumulated Other Comprehensive Loss  Total Shareholders' Equity
Balance at December 31, 2022 63,278  3,534  $ 633  $ (98,392) $ 1,999,376  $ 771,414  $ (7,848) $ 2,665,183 
Net income —  —  —  —  —  110,989  —  110,989 
Foreign currency translation adjustment, net of tax —  —  —  —  —  —  (10) (10)
Reclassification of net losses on derivative instruments from OCI to net income, net of tax —  —  —  —  —  —  339  339 
Postretirement medical liability adjustment, net of tax —  —  —  —  —  —  (502) (502)
Stock-based compensation 51  —  —  —  4,911  —  —  4,911 
Issuance of shares 1,433  (14) 15  270  74,267  —  —  74,552 
Dividends on common stock ($1.920 per share)
—  —  —  —  —  (115,048) —  (115,048)
Balance at September 30, 2023 64,762 3,520 $ 648  $ (98,122) $ 2,078,554  $ 767,355  $ (8,021) $ 2,740,414 
Balance at December 31, 2023 64,762 3,513 $ 648  $ (97,926) $ 2,078,753  $ 811,495  $ (7,656) $ 2,785,314 
Net income —  —  —  —  —  143,559  —  143,559 
Foreign currency translation adjustment, net of tax —  —  —  —  —  —  (1) (1)
Reclassification of net losses on derivative instruments from OCI to net income, net of tax —  —  —  —  —  —  339  339 
Postretirement medical liability adjustment, net of tax —  —  —  —  —  —  —  — 
Stock-based compensation 42  —  —  (272) 5,252  —  —  4,980 
Issuance of shares —  (17) —  641  555  —  —  1,196 
Dividends on common stock ($1.950 per share)
—  —  —  —  —  (118,925) —  (118,925)
Balance at September 30, 2024 64,804 3,496 648 (97,557) 2,084,560 836,129 (7,318) 2,816,462

See Notes to Condensed Consolidated Financial Statements

10


NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
(Reference is made to Notes to Financial Statements included in the NorthWestern Energy Group's Annual Report)
(Unaudited)

(1) Nature of Operations and Basis of Consolidation
 
NorthWestern Energy Group, doing business as NorthWestern Energy, provides electricity and/or natural gas to approximately 775,300 customers in Montana, South Dakota, Nebraska and Yellowstone National Park, through its subsidiaries NorthWestern Corporation (NW Corp) and NorthWestern Energy Public Service Corporation (NWE Public Service). We have generated and distributed electricity in South Dakota and distributed natural gas in South Dakota and Nebraska since 1923 and have generated and distributed electricity and distributed natural gas in Montana since 2002.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires us to make estimates and assumptions that may affect the reported amounts of assets, liabilities, revenues and expenses during the reporting period. Actual results could differ from those estimates. The unaudited Condensed Consolidated Financial Statements (Financial Statements) reflect all adjustments (which unless otherwise noted are normal and recurring in nature) that are, in our opinion, necessary to fairly present our financial position, results of operations and cash flows. The actual results for the interim periods are not necessarily indicative of the operating results to be expected for a full year or for other interim periods. Events occurring subsequent to September 30, 2024 have been evaluated as to their potential impact to the Financial Statements through the date of issuance.

The Financial Statements included herein have been prepared by NorthWestern, without audit, pursuant to the rules and regulations of the SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations; however, we believe that the condensed disclosures provided are adequate to make the information presented not misleading. We recommend that these Financial Statements be read in conjunction with the audited financial statements and related footnotes included in the NorthWestern Energy Group Annual Report on Form 10-K for the year ended December 31, 2023.

Holding Company Reorganization

On January 1, 2024, we completed the second and final phase of our holding company reorganization. NW Corp contributed the assets and liabilities of its South Dakota and Nebraska regulated utilities to NWE Public Service, and then distributed its equity interest in NWE Public Service and certain other subsidiaries to NorthWestern Energy Group, resulting in NW Corp owning and operating the Montana regulated utility and NWE Public Service owning and operating the Nebraska and South Dakota utilities, each as a direct subsidiary of NorthWestern Energy Group.

Supplemental Cash Flow Information

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Condensed Consolidated Statements of Cash Flows (in thousands):
September 30, December 31, September 30, December 31,
2024 2023 2023 2022
Cash and cash equivalents $ 2,527  $ 9,164  $ 5,091  $ 8,489 
Restricted cash 25,365  16,023  16,549  13,974 
Total cash, cash equivalents, and restricted cash shown in the Condensed Consolidated Statements of Cash Flows $ 27,892  $ 25,187  $ 21,640  $ 22,463 

Goodwill

We completed our annual goodwill impairment test as of April 1, 2024, and no impairment was identified. We calculate the fair value of our reporting units by considering various factors, including valuation studies based primarily on a discounted cash flow analysis, with published industry valuations and market data as supporting information. Key assumptions in the determination of fair value include the use of an appropriate discount rate and estimated future cash flows.
11


In estimating cash flows, we incorporate expected long-term growth rates in our service territory, regulatory stability, and commodity prices (where appropriate), as well as other factors that affect our revenue, expense and capital expenditure projections.

(2) Regulatory Matters

Montana Rate Review

In July 2024, we filed a Montana electric and natural gas rate review with the Montana Public Service Commission (MPSC). The filing requests a base rate annual revenue increase of $156.5 million ($69.4 million net with Property Tax and Power Cost and Credit Adjustment Mechanism (PCCAM) tracker adjustments) for electric and $28.6 million for natural gas. Our request is based on a return on equity of 10.80 percent with a capital structure including 46.81 percent equity, and forecasted 2024 electric and natural gas rate base of $3.45 billion and $731.9 million, respectively. The electric rate base investment includes the 175-megawatt natural gas-fired Yellowstone County Generating Station ("YCGS"), which was placed in service in October 2024.

Our filing included a request for interim base rates to be effective October 1, 2024. Implementation of interim base rates, if any, has been delayed beyond our requested effective date as the MPSC has not yet made a decision on the interim rate request.

The MPSC has developed its procedural schedule for our rate review request including a hearing scheduled to commence on April 22, 2025. If a final order is not received by May 23, 2025, which is 270 days from acceptance of our filing, we intend to implement, as permitted by the MPSC regulations, our requested rates, which will be subject to refund, until a final order is received.

South Dakota Natural Gas Rate Review

In June 2024, we filed a natural gas rate review (2023 test year) with the South Dakota Public Utilities Commission. The filing requests a base rate annual revenue increase of $6.0 million. Our request is based on a return on equity of 10.70 percent, a capital structure including 53.13 percent equity, and rate base of $95.6 million. If a final order is not received by December 21, 2024, interim base rates may go into effect.

Nebraska Natural Gas Rate Review

In June 2024, we filed a natural gas rate review (2023 test year) with the Nebraska Public Service Commission (NPSC). The filing requests a base rate annual revenue increase of $3.6 million. Our request is based on a return on equity of 10.70 percent, a capital structure including 53.13 percent equity, and rate base of $47.4 million. Interim rates, which increased base natural gas rates $2.3 million, were implemented on October 1, 2024. Interim rates will remain in effect on a refundable basis until the NPSC issues a final order.

(3) Income Taxes
 
We compute income tax expense for each quarter based on the estimated annual effective tax rate for the year, adjusted for certain discrete items. Our effective tax rate typically differs from the federal statutory tax rate due to the regulatory impact of flowing through the federal and state tax benefit of repairs deductions, state tax benefit of accelerated tax depreciation deductions (including bonus depreciation when applicable) and production tax credits. The regulatory accounting treatment of these deductions requires immediate income recognition for temporary tax differences of this type, which is referred to as the flow-through method. When the flow-through method of accounting for temporary differences is reflected in regulated revenues, we record deferred income taxes and establish related regulatory assets and liabilities.

The following table summarizes the differences between our effective tax rate and the federal statutory rate (in thousands):
12


  Three Months Ended September 30,
2024 2023
Income before income taxes $ 43,652  $ 31,032 
Income tax calculated at federal statutory rate 9,167  21.0  % 6,516  21.0  %
Permanent or flow-through adjustments:
State income tax, net of federal provisions 61  0.1  121  0.4 
Gas repairs safe harbor method change (6,994) (16.0) —  — 
Flow-through repairs deductions (4,581) (10.5) (4,189) (13.5)
Production tax credits (2,447) (5.6) (1,261) (4.1)
Amortization of excess deferred income tax (219) (0.5) (323) (1.0)
Income tax return to accrual adjustment —  —  411  1.3 
Plant and depreciation flow-through items 1,816  4.2  358  1.2 
Other, net 30  0.0  64  0.2 
(12,334) (28.3) (4,819) (15.5)
Income tax (benefit) expense $ (3,167) (7.3) % $ 1,697  5.5  %

  Nine Months Ended September 30,
2024 2023
Income before income taxes $ 154,969  $ 125,074 
Income tax calculated at federal statutory rate 32,544  21.0  % 26,265  21.0  %
Permanent or flow through adjustments:
State income, net of federal provisions 749  0.5  1,353  1.1 
Flow-through repairs deductions (13,824) (8.9) (11,742) (9.4)
Production tax credits (7,434) (4.8) (5,607) (4.5)
Gas repairs safe harbor method change (6,994) (4.5) —  — 
Amortization of excess deferred income tax (775) (0.5) (1,355) (1.1)
Reduction to previously claimed alternative minimum tax credit —  —  3,186  2.5 
Income tax return to accrual adjustment —  —  411  0.3 
Plant and depreciation flow through items 5,955  3.8  1,247  1.0 
Share-based compensation 298  0.2  388  0.3 
Other, net 891  0.6  (61) 0.1 
(21,134) (13.6) (12,180) (9.7)
Income tax expense $ 11,410  7.4  % $ 14,085  11.3  %

In 2023, the Internal Revenue Service (IRS) issued a safe harbor method of accounting for the repair and maintenance of natural gas transmission and distribution property. During the three months ended September 30, 2024, after completion of our impact analysis of the gas repairs safe harbor method change, we recorded an income tax benefit of approximately $7.0 million related to tax deductions for repair costs that were previously capitalized in the 2022 and prior tax years.
13


Uncertain Tax Positions

We recognize tax positions that meet the more-likely-than-not threshold as the largest amount of tax benefit that is greater than 50 percent likely of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. We had unrecognized tax benefits of approximately $26.9 million as of September 30, 2024, including approximately $24.3 million that, if recognized, would impact our effective tax rate. In the next twelve months we expect the statute of limitations to expire for certain uncertain tax benefits, which would result in a decrease to our total unrecognized tax benefits of approximately $16.9 million.

Our policy is to recognize interest and penalties related to uncertain tax positions in income tax expense. As of September 30, 2024, we have accrued $6.8 million for the payment of interest and penalties on the Condensed Consolidated Balance Sheets. As of December 31, 2023, we had accrued $4.5 million for the payment of interest and penalties on the Condensed Consolidated Balance Sheets.

Tax years 2020 and forward remain subject to examination by the Internal Revenue Service and state taxing authorities.

(4) Comprehensive (Loss) Income

The following tables display the components of Other Comprehensive Income (Loss), after-tax, and the related tax effects (in thousands):
Three Months Ended
September 30, 2024 September 30, 2023
  Before-Tax Amount Tax Expense Net-of-Tax Amount Before-Tax Amount Tax Expense Net-of-Tax Amount
Foreign currency translation adjustment $ $ —  $ $ (7) $ —  $ (7)
Reclassification of net income on derivative instruments 153  (40) 113  153  (40) 113 
Defined benefit pension plan and postretirement medical liability adjustment —  —  —  (212) 44  (168)
Other comprehensive income (loss) $ 154  $ (40) $ 114  $ (66) $ $ (62)

Nine Months Ended
September 30, 2024 September 30, 2023
  Before-Tax Amount Tax Expense Net-of-Tax Amount Before-Tax Amount Tax Expense Net-of-Tax Amount
Foreign currency translation adjustment $ (1) $ —  $ (1) $ (10) $ —  $ (10)
Reclassification of net income on derivative instruments 459  (120) 339  459  (120) 339 
Defined benefit pension plan and postretirement medical liability adjustment —  —  —  (636) 134  (502)
Other comprehensive income (loss) $ 458  $ (120) $ 338  $ (187) $ 14  $ (173)

Balances by classification included within accumulated other comprehensive loss (AOCL) on the Condensed Consolidated Balance Sheets are as follows, net of tax (in thousands):
  September 30, 2024 December 31, 2023
Foreign currency translation $ 1,436  $ 1,437 
Derivative instruments designated as cash flow hedges (9,034) (9,373)
Defined benefit pension plan 280  280 
Accumulated other comprehensive loss $ (7,318) $ (7,656)

14


The following tables display the changes in AOCL by component, net of tax (in thousands):
Three Months Ended
September 30, 2024
Affected Line Item in the Condensed Consolidated Statements of Income Interest Rate Derivative Instruments Designated as Cash Flow Hedges Defined Benefit Pension Plan Foreign Currency Translation Total
Beginning balance $ (9,147) $ 280  $ 1,435  $ (7,432)
Other comprehensive income before reclassifications —  — 
Amounts reclassified from AOCL Interest Expense 113  —  —  113 
Net current-period other comprehensive income 113  —  114 
Ending balance $ (9,034) $ 280  $ 1,436  $ (7,318)

Three Months Ended
September 30, 2023
Affected Line Item in the Condensed Consolidated Statements of Income Interest Rate Derivative Instruments Designated as Cash Flow Hedges Postretirement Medical Plans Foreign Currency Translation Total
Beginning balance $ (9,599) $ 208  $ 1,432  $ (7,959)
Other comprehensive loss before reclassifications —  —  (7) (7)
Amounts reclassified from AOCL Interest Expense 113  —  —  113 
Amounts reclassified from AOCL —  (168) —  (168)
Net current-period other comprehensive income (loss) 113  (168) (7) (62)
Ending balance $ (9,486) $ 40  $ 1,425  $ (8,021)

Nine Months Ended
September 30, 2024
Affected Line Item in the Condensed Consolidated Statements of Income Interest Rate Derivative Instruments Designated as Cash Flow Hedges Defined Benefit Pension Plan and Postretirement Medical Plans Foreign Currency Translation Total
Beginning balance $ (9,373) $ 280  $ 1,437  $ (7,656)
Other comprehensive loss before reclassifications —  —  (1) (1)
Amounts reclassified from AOCL Interest Expense 339  —  —  339 
Net current-period other comprehensive income (loss) 339  —  (1) 338 
Ending balance $ (9,034) $ 280  $ 1,436  $ (7,318)
15



Nine Months Ended
September 30, 2023
Affected Line Item in the Condensed Consolidated Statements of Income Interest Rate Derivative Instruments Designated as Cash Flow Hedges Pension and Postretirement Medical Plans Foreign Currency Translation Total
Beginning balance $ (9,825) $ 542  $ 1,435  $ (7,848)
Other comprehensive loss before reclassifications —  —  (10) (10)
Amounts reclassified from AOCL Interest Expense 339  —  —  339 
Amounts reclassified from AOCL —  (502) —  (502)
Net current-period other comprehensive income (loss) 339  (502) (10) (173)
Ending balance $ (9,486) $ 40  $ 1,425  $ (8,021)

(5) Financing Activities

On March 28, 2024, NW Corp issued and sold $175.0 million aggregate principal amount of Montana First Mortgage Bonds at a fixed interest rate of 5.56 percent maturing on March 28, 2031. These bonds were issued in transactions exempt from the registration requirements of the Securities Act of 1933. Proceeds were used to redeem NW Corp's $100.0 million of Montana First Mortgage Bonds due this year and for other general utility purposes. The bonds are secured by NW Corp's electric and natural gas assets associated with its Montana utility operations.

On March 28, 2024, NWE Public Service issued and sold $33.0 million aggregate principal amount of South Dakota First Mortgage Bonds at a fixed interest rate of 5.55 percent maturing on March 28, 2029, and $7.0 million aggregate principal amount of South Dakota First Mortgage Bonds at a fixed interest rate of 5.75 percent maturing on March 28, 2034. These bonds were issued in transactions exempt from the registration requirements of the Securities Act of 1933. Proceeds were used for general utility purposes. The bonds are secured by NWE Public Service's electric and natural gas assets associated with its South Dakota and Nebraska utility operations.

On April 12, 2024, NorthWestern Energy Group entered into a $100.0 million Term Loan Credit Agreement (Term Loan) with a maturity date of April 11, 2025. Borrowings may be made at a variable interest rate equal to the Secured Overnight Financing Rate plus an applicable margin as provided in the Term Loan. These proceeds were used to repay a portion of our outstanding revolving credit facility borrowings and for general corporate purposes. The Term Loan provides for prepayment of the principal and interest; however, amounts prepaid may not be reborrowed. The Term Loan requires us to maintain a consolidated indebtedness to total capitalization ratio of 65 percent or less. It also contains covenants which, among other things, limit our ability to engage in any consolidation or merger or otherwise liquidate or dissolve, dispose of property, and restricts certain affiliate transactions. A default on the South Dakota or Montana First Mortgage Bonds would trigger a cross default on the Term Loan; however a default on the Term Loan would not trigger a default on the South Dakota or Montana First Mortgage Bonds.


(6) Segment Information
 
Our reportable business segments are primarily engaged in the electric and natural gas business. The remainder of our operations are presented as other, which primarily consists of unallocated corporate costs and unregulated activity.

We evaluate the performance of these segments based on utility margin. The accounting policies of the operating segments are the same as the parent except that the parent allocates some of its operating expenses to the operating segments according to a methodology designed by us for internal reporting purposes and involves estimates and assumptions.

Financial data for the business segments are as follows (in thousands):
16


Three Months Ended        
September 30, 2024 Electric Gas Other Eliminations Total
Operating revenues $ 306,478  $ 38,683  $ —  $ —  $ 345,161 
Fuel, purchased supply and direct transmission expense (exclusive of depreciation and depletion shown separately below) 80,761  7,127  —  —  87,888 
Utility margin 225,717  31,556  —  —  257,273 
Operating and maintenance 42,491  13,375  —  —  55,866 
Administrative and general 24,892  9,887  145  —  34,924 
Property and other taxes 32,251  9,345  —  —  41,596 
Depreciation and depletion 47,540  9,414  —  —  56,954 
Operating income (loss) 78,543  (10,465) (145) —  67,933 
Interest expense, net (24,188) (7,537) (1,672) —  (33,397)
Other income, net 6,057  3,017  42  —  9,116 
Income tax (expense) benefit (7,635) 9,734  1,068  —  3,167 
Net income (loss) $ 52,777  $ (5,251) $ (707) $ —  $ 46,819 
Total assets $ 6,256,750  $ 1,578,075  $ 19,249  $ —  $ 7,854,074 
Capital expenditures $ 109,925  $ 43,225  $ —  $ —  $ 153,150 

Three Months Ended
September 30, 2023 Electric Gas Other Eliminations Total
Operating revenues $ 280,030  $ 41,060  $ —  $ —  $ 321,090 
Fuel, purchased supply and direct transmission expense (exclusive of depreciation and depletion shown separately below) 77,995  10,948  —  —  88,943 
Utility margin 202,035  30,112  —  —  232,147 
Operating and maintenance 39,990  13,250  —  —  53,240 
Administrative and general 20,682  8,249  424  —  29,355 
Property and other taxes 33,740  9,574  (1,551) —  41,763 
Depreciation and depletion 43,230  8,929  —  —  52,159 
Operating income (loss) 64,393  (9,890) 1,127  —  55,630 
Interest expense, net (21,300) (4,426) (2,999) —  (28,725)
Other income (expense), net 3,380  1,328  (581) —  4,127 
Income tax (expense) benefit (3,223) (41) 1,567  —  (1,697)
Net income (loss) $ 43,250  $ (13,029) $ (886) $ —  $ 29,335 
Total assets $ 5,963,950  $ 1,454,445  $ 11,104  $ —  $ 7,429,499 
Capital expenditures $ 110,804  $ 46,359  $ —  $ —  $ 157,163 

17


Nine Months Ended        
September 30, 2024 Electric Gas Other Eliminations Total
Operating revenues $ 909,798  $ 230,634  $ —  $ —  $ 1,140,432 
Fuel, purchased supply and direct transmission expense (exclusive of depreciation and depletion shown separately below) 256,989  82,100  —  —  339,089 
Utility margin 652,809  148,534  —  —  801,343 
Operating and maintenance 126,257  41,158  —  —  167,415 
Administrative and general 76,105  27,754  2,791  —  106,650 
Property and other taxes 96,557  28,465  —  125,023 
Depreciation and depletion 142,390  28,240  —  —  170,630 
Operating income (loss) 211,500  22,917  (2,792) —  231,625 
Interest expense, net (72,143) (20,933) (3,175) —  (96,251)
Other income (expense), net 15,549  4,998  (952) —  19,595 
Income tax (expense) benefit
(18,809) 6,865  534  —  (11,410)
Net income (loss) $ 136,097  $ 13,847  $ (6,385) $ —  $ 143,559 
Total assets $ 6,256,750  $ 1,578,075  $ 19,249  $ —  $ 7,854,074 
Capital expenditures $ 312,773  $ 87,738  $ —  $ —  $ 400,511 

Nine Months Ended
September 30, 2023 Electric Gas Other Eliminations Total
Operating revenues $ 804,604  $ 261,530  $ —  $ —  $ 1,066,134 
Fuel, purchased supply and direct transmission expense (exclusive of depreciation and depletion shown separately below) 198,492  123,521  —  —  322,013 
Utility margin 606,112  138,009  —  —  744,121 
Operating and maintenance 123,771  40,170  —  —  163,941 
Administrative and general 67,285  26,336  437  —  94,058 
Property and other taxes 103,013  29,576  (1,546) —  131,043 
Depreciation and depletion 130,447  27,340  —  —  157,787 
Operating income 181,596  14,587  1,109  —  197,292 
Interest expense, net (61,584) (12,167) (11,393) —  (85,144)
Other income (expense), net 9,700  3,887  (661) —  12,926 
Income tax expense (13,366) (180) (539) —  (14,085)
Net income (loss) $ 116,346  $ 6,127  $ (11,484) $ —  $ 110,989 
Total assets $ 5,963,950  $ 1,454,445  $ 11,104  $ —  $ 7,429,499 
Capital expenditures $ 326,313  $ 94,212  $ —  $ —  $ 420,525 

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(7)  Revenue from Contracts with Customers

Nature of Goods and Services

We provide retail electric and natural gas services to three primary customer classes. Our largest customer class consists of residential customers, which includes single private dwellings and individual apartments. Our commercial customers consist primarily of main street businesses, and our industrial customers consist primarily of manufacturing and processing businesses that turn raw materials into products.

Electric Segment - Our regulated electric utility business primarily provides generation, transmission, and distribution services to customers in our Montana and South Dakota jurisdictions. We recognize revenue when electricity is delivered to the customer. Payments on our tariff-based sales are generally due 0-30 days after the billing date.

Natural Gas Segment - Our regulated natural gas utility business primarily provides production, storage, transmission, and distribution services to customers in our Montana, South Dakota, and Nebraska jurisdictions. We recognize revenue when natural gas is delivered to the customer. Payments on our tariff-based sales are generally due 0-30 days after the billing date.

Disaggregation of Revenue

The following tables disaggregate our revenue by major source and customer class (in millions):
Three Months Ended
September 30, 2024 September 30, 2023
Electric Natural Gas Total Electric Natural Gas Total
Montana $ 100.7  $ 8.4  $ 109.1  $ 96.8  $ 9.6  $ 106.4 
South Dakota 19.1  1.7  20.8  18.0  2.0  20.0 
Nebraska —  1.8  1.8  —  2.2  2.2 
Residential 119.8  11.9  131.7  114.8  13.8  128.6 
Montana 109.6  6.2  115.8  110.1  6.1  116.2 
South Dakota 30.1  1.3  31.4  27.5  1.5  29.0 
Nebraska —  0.8  0.8  —  1.3  1.3 
Commercial 139.7  8.3  148.0  137.6  8.9  146.5 
Industrial 11.8  0.1  11.9  11.4  0.1  11.5 
Lighting, governmental, irrigation, and interdepartmental 14.1  0.2  14.3  13.2  0.2  13.4 
Total Customer Revenues 285.4  20.5  305.9  277.0  23.0  300.0 
Other tariff and contract based revenues 28.0  9.3  37.3  22.1  10.2  32.3 
Total Revenue from Contracts with Customers 313.4  29.8  343.2  299.1  33.2  332.3 
Regulatory amortization and other (6.9) 8.9  2.0  (19.1) 7.9  (11.2)
Total Revenues $ 306.5  $ 38.7  $ 345.2  $ 280.0  $ 41.1  $ 321.1 

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Nine Months Ended
September 30, 2024 September 30, 2023
Electric Natural Gas Total Electric Natural Gas Total
Montana $ 304.1  $ 75.9  $ 380.0  $ 306.1  $ 94.1  $ 400.2 
South Dakota 53.8  21.2  75.0  53.4  30.3  83.7 
Nebraska —  16.1  16.1  —  30.2  30.2 
   Residential 357.9  113.2  471.1  359.5  154.6  514.1 
Montana 310.8  42.0  352.8  324.6  52.4  377.0 
South Dakota 84.2  14.3  98.5  77.8  21.3  99.1 
Nebraska —  9.0  9.0  —  19.1  19.1 
   Commercial 395.0  65.3  460.3  402.4  92.8  495.2 
Industrial 34.8  0.7  35.5  34.0  1.0  35.0 
Lighting, governmental, irrigation, and interdepartmental 27.4  1.1  28.5  27.2  1.3  28.5 
Total Customer Revenues 815.1  180.3  995.4  823.1  249.7  1,072.8 
Other tariff and contract based revenues 77.4  30.9  108.3  63.5  33.1  96.6 
Total Revenue from Contracts with Customers 892.5  211.2  1,103.7  886.6  282.8  1,169.4 
Regulatory amortization and other 17.3  19.4  36.7  (82.0) (21.3) (103.3)
Total Revenues $ 909.8  $ 230.6  $ 1,140.4  $ 804.6  $ 261.5  $ 1,066.1 

(8) Earnings Per Share
 
Basic earnings per share are computed by dividing earnings applicable to common stock by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflect the potential dilution of common stock equivalent shares that could occur if unvested shares were to vest. Common stock equivalent shares are calculated using the treasury stock method, as applicable. The dilutive effect is computed by dividing earnings applicable to common stock by the weighted average number of common shares outstanding plus the effect of the outstanding unvested restricted stock and performance share awards. Average shares used in computing the basic and diluted earnings per share are as follows:

Three Months Ended
September 30, 2024 September 30, 2023
Basic computation 61,301,696  60,442,164 
Dilutive effect of:
Performance share awards(1)
95,279  35,533 
Diluted computation 61,396,975  60,477,697 

Nine Months Ended
September 30, 2024 September 30, 2023
Basic computation 61,285,570  60,010,609 
  Dilutive effect of:  
Performance share awards(1)
69,136  31,311 
Diluted computation 61,354,706  60,041,920 
(1) Performance share awards are included in diluted weighted average number of shares outstanding based upon what would be issued if the end of the most recent reporting period was the end of the term of the award.

As of September 30, 2024, there were 16,015 shares from performance and restricted share awards which were antidilutive and excluded from the earnings per share calculations, compared to 32,649 shares as of September 30, 2023.

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(9) Employee Benefit Plans
 
We sponsor and/or contribute to pension and postretirement health care and life insurance benefit plans for eligible employees. Net periodic benefit cost (credit) for our pension and other postretirement plans consists of the following (in thousands):
  Pension Benefits Other Postretirement Benefits
  Three Months Ended September 30, Three Months Ended September 30,
  2024 2023 2024 2023
Components of Net Periodic Benefit Cost (Credit)        
Service cost $ 1,398  $ 1,459  $ 77  $ 84 
Interest cost 5,736  6,524  139  168 
Expected return on plan assets (6,331) (6,679) (320) (274)
Amortization of prior service credit —  —  —  29 
Recognized actuarial loss (gain) 68  (18) 18 
Net periodic benefit cost (credit) $ 811  $ 1,372  $ (122) $ 25 

  Pension Benefits Other Postretirement Benefits
  Nine Months Ended September 30, Nine Months Ended September 30,
  2024 2023 2024 2023
Components of Net Periodic Benefit Cost (Credit)        
Service cost $ 4,194  $ 4,375  $ 231  $ 250 
Interest cost 17,208  19,571  418  505 
Expected return on plan assets (18,994) (20,036) (960) (822)
Amortization of prior service credit —  —  —  87 
Recognized actuarial loss (gain) 25  205  (55) 54 
Net periodic benefit cost (credit) $ 2,433  $ 4,115  $ (366) $ 74 
We contributed $8.6 million to our pension plans during the nine months ended September 30, 2024. We expect to contribute an additional $2.6 million to our pension plans during the remainder of 2024.

(10) Commitments and Contingencies

ENVIRONMENTAL LIABILITIES AND REGULATION
Except as set forth below, the circumstances set forth in Note 18 - Commitments and Contingencies to the financial statements included in the NorthWestern Energy Group Annual Report on Form 10-K for the year ended December 31, 2023 appropriately represent, in all material respects, the current status of our environmental liabilities and regulation.

Environmental Protection Agency (EPA) Rules

On April 25, 2024, the EPA released final rules related to greenhouse gas (GHG) emission standards (GHG Rules) for existing coal-fired facilities and new coal and natural gas-fired facilities as well as final rules strengthening the MATS requirements (MATS Rules). Compliance with the rules will require expensive upgrades at Colstrip Units 3 and 4 with proposed compliance dates that may not be achievable and / or require technology that is unproven, resulting in significant impacts to costs of the facilities. The final MATS and GHG Rules require compliance as early as 2027 and 2032, respectively.

Previous efforts by the EPA were met with extensive litigation, and this time is no different. We, along with many other utilities, electric cooperatives, organizations, and states, have petitioned for judicial review of the GHG and MATS Rules with the U.S. Court of Appeals for the D.C. Circuit. The United States Supreme Court denied the multiple stay requests related to the MATS Rule and the GHG Rule. The litigation on the merits continues for both the MATS and GHG rules in the D.C. Circuit Court of Appeals, and decisions are expected in 2025. If the MATS Rules and GHG Rules are implemented, it would result in additional material compliance costs.
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We will continue working with federal and state regulatory authorities, other utilities, and stakeholders to seek relief from the MATS and GHG regulations that, in our view, disproportionately impact customers in our region.

These GHG Rules and MATS Rules as well as future additional environmental requirements - federal or state - could cause us to incur material costs of compliance, increase our costs of procuring electricity, decrease transmission revenue and impact cost recovery. Technology to efficiently capture, remove and/or sequester such GHG emissions or hazardous air pollutants may not be available within a timeframe consistent with the implementation of any such requirements.

LEGAL PROCEEDINGS

State of Montana - Riverbed Rents

On April 1, 2016, the State of Montana (State) filed a complaint on remand (the State’s Complaint) with the Montana First Judicial District Court (State District Court), naming us, along with Talen Montana, LLC (Talen) as defendants. The State claimed it owns the riverbeds underlying 10 of our, and formerly Talen’s, hydroelectric facilities (dams, along with reservoirs and tailraces) on the Missouri, Madison and Clark Fork Rivers, and seeks rents for Talen’s and our use and occupancy of such lands. The facilities at issue include the Hebgen, Madison, Hauser, Holter, Black Eagle, Rainbow, Cochrane, Ryan, and Morony facilities on the Missouri and Madison Rivers and the Thompson Falls facility on the Clark Fork River. We acquired these facilities from Talen in November 2014.

The litigation has a long prior history in state and federal court, including before the United States Supreme Court, as detailed in Note 18 - Commitments and Contingencies to the financial statements included in the NorthWestern Energy Group Annual Report on Form 10-K for the year ended December 31, 2023. On April 20, 2016, we removed the case from State District Court to the United States District Court for the District of Montana (Federal District Court). On August 1, 2018, the Federal District Court granted our and Talen’s motions to dismiss the State’s Complaint as it pertains to the navigability of the riverbeds associated with four of our hydroelectric facilities near Great Falls. A bench trial before the Federal District Court commenced January 4, 2022, and concluded on January 18, 2022, which addressed the issue of navigability concerning our other six facilities. On August 25, 2023, the Federal District Court issued its Findings of Fact, Conclusions of Law, and Order (the "Order"), which found all but one of the segments of the riverbeds in dispute not navigable, and thus not owned by the State of Montana. The one segment found navigable, and thus owned by the State, was the segment on which the Black Eagle development was located. The State filed a motion to pursue an interlocutory appeal of the Order, and on January 2, 2024, the Federal District Court certified the Order for appeal to the 9th Circuit Court of Appeals. Briefing in the appeal is underway. Damages were bifurcated by agreement and will be tried separately for the Black Eagle segment, and any other segments found navigable, should the State prevail on appeal.

We dispute the State’s claims and intend to continue to vigorously defend the lawsuit. If the Federal District Court calculates damages as the State District Court did in 2008, we do not anticipate the resulting annual rent for the Black Eagle segment would have a material impact to our financial position or results of operations. We anticipate that any obligation to pay the State rent for use and occupancy of the riverbeds would be recoverable in rates from customers, although there can be no assurances that the MPSC would approve any such recovery.

Colstrip Arbitration

The remaining depreciable life of our investment in Colstrip Unit 4 is through 2042. The six owners of Colstrip Units 3 and 4 currently share the operating costs pursuant to the terms of an Ownership and Operation Agreement (O&O Agreement). However, several of the owners are mandated by Washington and Oregon law to eliminate coal-fired resources in 2025 and 2029, respectively.

As a result of the mandate, the owners have disagreed on various operational funding decisions, including whether closure requires each owner’s consent under the O&O Agreement. On March 12, 2021, we initiated an arbitration under the O&O Agreement (the “Arbitration”), to resolve the issues of whether closure requires each owner's consent and to clarify each owner's obligations to continue to fund operations until all joint owners agree on closure. On September 17, 2024, the owners agreed to stay the Arbitration for 120 days.

Colstrip Coal Dust Litigation

On December 14, 2020, a claim was filed against Talen in the Montana Sixteenth Judicial District Court, Rosebud County, Cause No. CV-20-58. Talen is one of the co-owners of Colstrip Unit 3, and the operator of Units 3 and 4. The plaintiffs allege they have suffered adverse effects from coal dust generated during operations associated with Colstrip. On August 26, 2021, the claim was amended to add in excess of 100 plaintiffs; though the number of plaintiffs has since decreased to 57.
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It also added NorthWestern, the other owners of Colstrip, and Westmoreland Rosebud Mining LLC, as defendants. Plaintiffs are seeking economic damages, costs and disbursements, punitive damages, attorneys’ fees, and an injunction prohibiting defendants from allowing coal dust to blow onto plaintiffs’ properties. We do not anticipate that the amount of ultimate liability, if any, will have a material effect on our financial position, results of operations, or cash flows.

Yellowstone County Generating Station Air Permit

On October 21, 2021, the Montana Environmental Information Center and the Sierra Club filed a lawsuit in Montana State District Court, against the Montana Department of Environmental Quality (MDEQ) and NorthWestern, alleging that the environmental analysis conducted by MDEQ prior to issuance of the Yellowstone County Generating Station's air quality construction permit was inadequate. On April 4, 2023, the Montana District Court issued an order finding MDEQ's environmental analysis was deficient in not addressing exterior lighting and greenhouse gases and remanded it back to MDEQ to address the deficiencies and vacated the air quality permit pending that remand. As a result of the vacatur of the permit, we paused construction. On June 8, 2023, the Montana District Court granted our motion to stay the order vacating the air quality permit pending the outcome of our appeal to the Montana Supreme Court. Oral argument was held May 15, 2024. We recommenced construction in June 2023 and placed the plant in service in October 2024. The ultimate resolution of the lawsuit challenging the Yellowstone County Generating Station air quality permit could impact our ability to operate the facility.

During the litigation of the air permit, Montana House Bill 971 was signed into law, preventing the MDEQ from, except under certain exceptions, evaluating greenhouse gas emissions and corresponding impacts to the climate in environmental reviews of large projects such as coal mines and power plants. On August 4, 2023, the Montana First Judicial District Court in Held v. State of Montana, a separate case by Montana youths alleging climate damages, issued its order finding House Bill 971 unconstitutional delaying the issuance of the revised Yellowstone County Generating Station's air permit. The Montana Supreme Court granted NorthWestern permission to participate as amicus in the Held appeal. The Montana Supreme Court heard oral argument on the Held appeal on July 10, 2024.

Other Legal Proceedings

We are also subject to various other legal proceedings, governmental audits and claims that arise in the ordinary course of business. In our opinion, the amount of ultimate liability with respect to these other actions will not materially affect our financial position, results of operations, or cash flows.
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ITEM 2.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Non-GAAP Financial Measure

The following discussion includes financial information prepared in accordance with GAAP, as well as another financial measure, Utility Margin, that is considered a “non-GAAP financial measure.” Generally, a non-GAAP financial measure is a numerical measure of a company’s financial performance, financial position or cash flows that excludes (or includes) amounts that are included in (or excluded from) the most directly comparable measure calculated and presented in accordance with GAAP. We define Utility Margin as Operating Revenues less fuel, purchased supply and direct transmission expense (exclusive of depreciation and depletion) as presented in our Condensed Consolidated Statements of Income. This measure differs from the GAAP definition of Gross Margin due to the exclusion of Operating and maintenance, Property and other taxes, and Depreciation and depletion expenses, which are presented separately in our Condensed Consolidated Statements of Income. The following discussion includes a reconciliation of Utility Margin to Gross Margin, the most directly comparable GAAP measure.

We believe that Utility Margin provides a useful measure for investors and other financial statement users to analyze our financial performance in that it excludes the effect on total revenues caused by volatility in energy costs and associated regulatory mechanisms. This information is intended to enhance an investor's overall understanding of results. Under our various state regulatory mechanisms, as detailed below, our supply costs are generally collected from customers. In addition, Utility Margin is used by us to determine whether we are collecting the appropriate amount of energy costs from customers to allow for recovery of operating costs, as well as to analyze how changes in loads (due to weather, economic or other conditions), rates and other factors impact our results of operations. Our Utility Margin measure may not be comparable to that of other companies' presentations or more useful than the GAAP information provided elsewhere in this report.

OVERVIEW

NorthWestern Energy Group, doing business as NorthWestern Energy, provides electricity and/or natural gas to approximately 775,300 customers in Montana, South Dakota, Nebraska and Yellowstone National Park. Our operations in Montana and Yellowstone National Park are conducted through our subsidiary, NW Corp, and our operations in South Dakota and Nebraska are conducted through our subsidiary, NWE Public Service. For a discussion of NorthWestern’s business strategy, see Management’s Discussion and Analysis of Financial Condition and Results of Operations in the NorthWestern Energy Group Annual Report on Form 10-K for the year ended December 31, 2023.

We work to deliver safe, reliable, and innovative energy solutions that create value for customers, communities, employees, and investors. We do this by providing low-cost and reliable service performed by highly-adaptable and skilled employees. We are focused on delivering long-term shareholder value through:

•Infrastructure investment focused on a stronger and smarter grid to improve the customer experience, while enhancing grid reliability and safety. This includes automation in customer meters, distribution and substations that enables the use of proven new technologies.

•Investing in and integrating supply resources that balance reliability, cost, capacity, and sustainability considerations with more predictable long-term commodity prices.

•Continually improving our operating efficiency. Financial discipline is essential to earning our authorized return on invested capital and maintaining a strong balance sheet, stable cash flows, and quality credit ratings to continue to attract cost-effective capital for future investment.

We expect to pursue these investment opportunities and manage our business in a manner that allows us to be flexible in adjusting to changing economic conditions by adjusting the timing and scale of the projects.

We are committed to providing customers with reliable and affordable electric and natural gas services while also being good stewards of the environment. Towards this end, our efforts towards a carbon-free future are outlined through our goal to achieve net zero carbon emissions by 2050.

As you read this discussion and analysis, refer to our Condensed Consolidated Statements of Income, which present the results of our operations for the three and nine months ended September 30, 2024 and 2023.

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HOW WE PERFORMED AGAINST OUR THIRD QUARTER 2023 RESULTS
Three Months Ended
September 30, 2024 vs. 2023
Income Before Income Taxes
Income Tax (Expense) Benefit(3)
Net Income
(in millions)
Third Quarter, 2023 $ 31.0  $ (1.7) $ 29.3 
Variance in revenue and fuel, purchased supply, and direct transmission expense(1) items impacting net income:
Base rates
17.2  (4.4) 12.8 
Electric transmission revenue
5.9  (1.5) 4.4 
Electric retail volumes
3.6  (0.9) 2.7 
Montana property tax tracker collections 1.5  (0.4) 1.1 
Montana natural gas transportation
0.9  (0.2) 0.7 
Non-recoverable Montana electric supply costs
0.6  (0.2) 0.4 
Natural gas retail volumes
(0.3) 0.1  (0.2)
Production tax credits, offset within income tax benefit
(0.2) 0.2  — 
Other (1.2) 0.3  (0.9)
Variance in expense items(2) impacting net income:
Operating, maintenance, and administrative
(5.5) 1.4  (4.1)
Depreciation
(4.8) 1.2  (3.6)
Interest expense
(4.7) 1.2  (3.5)
Property and other taxes not recoverable within trackers (1.9) 0.5  (1.4)
Gas repairs safe harbor method change
—  7.0  7.0 
Other 1.5  0.6  2.1 
Third Quarter, 2024 $ 43.6  $ 3.2  $ 46.8 
Change in Net Income $ 17.5 
(1) Exclusive of depreciation and depletion shown separately below
(2) Excluding fuel, purchased supply, and direct transmission expense
(3) Income tax expense calculation on reconciling items assumes a blended federal plus state effective tax rate of 25.3 percent.

Consolidated net income for the three months ended September 30, 2024 was $46.8 million as compared with $29.3 million for the same period in 2023. This increase was primarily due to new base rates in Montana and South Dakota, electric transmission revenues, electric retail volumes, Montana property tax tracker collections, lower non-recoverable Montana electric supply costs, and an income tax benefit from a change to the gas repairs safe harbor method. These were offset in part by natural gas retail volumes, depreciation, operating, administrative and general costs, and interest expense.

SIGNIFICANT TRENDS AND REGULATION

Refer to the NorthWestern Energy Group Annual Report on the Form 10-K for the year ended December 31, 2023 for disclosure of the significant trends and regulations that could have a significant impact on our business. These significant trends and regulations have not changed materially since such disclosure, except as follows:

Yellowstone County 175 MW plant

Construction of the new generation facility was substantially completed and the plant placed in service in October 2024. The lawsuit challenging the YCGS air quality permit, which required us to suspend construction activities for a period of time, as well as additional related legal and construction challenges, delayed the project timing and have increased costs. As of September 30, 2024, total costs of approximately $305.6 million have been incurred, with expected total costs of approximately $310.0 million to $320.0 million.
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See Note 10 - Commitments and Contingencies to the Condensed Consolidated Financial Statements included herein for additional information regarding legal challenges impacting YCGS.

Regulatory Update

Rate reviews are necessary to recover the cost of providing safe, reliable service, while contributing to earnings growth and achieving our financial objectives. We regularly review the need for electric and natural gas rate relief in each state in which we provide service. Our ongoing rate review activity includes the following:

Montana Rate Review - In July 2024, we filed a Montana electric and natural gas rate review with the MPSC. The filing requests a base rate annual revenue increase of $156.5 million ($69.4 million net with Property Tax and PCCAM tracker adjustments) for electric and $28.6 million for natural gas. Our request is based on a return on equity of 10.80 percent with a capital structure including 46.81 percent equity, and forecasted 2024 electric and natural gas rate base of $3.45 billion and $731.9 million, respectively. The electric rate base investment includes the 175-megawatt natural gas-fired Yellowstone County Generating Station, which was placed in service in October 2024.

Our filing included a request for interim base rates to be effective October 1, 2024. Implementation of interim base rates, if any, has been delayed beyond our requested effective date as the MPSC has not yet made a decision on the interim rate request.

The MPSC has developed its procedural schedule for our rate review request including a hearing scheduled to commence on April 22, 2025. If a final order is not received by May 23, 2025, which is 270 days from acceptance of our filing, we intend to implement, as permitted by the MPSC regulations, our requested rates, which will be subject to refund, until a final order is received.

South Dakota Natural Gas Rate Review - In June 2024, we filed a natural gas rate review with the South Dakota Public Utilities Commission. The filing requests a base rate annual revenue increase of $6.0 million. Our request is based on a return on equity of 10.70 percent, a capital structure including 53.13 percent equity, and rate base of $95.6 million. If a final order is not received by December 21, 2024, interim base rates may go into effect.

Nebraska Natural Gas Rate Review - In June 2024, we filed a natural gas rate review with the NPSC. The filing requests a base rate annual revenue increase of $3.6 million. Our request is based on a return on equity of 10.70 percent, a capital structure including 53.13 percent equity, and rate base of $47.4 million. Interim rates, which increased base natural gas rates $2.3 million, were implemented on October 1, 2024. Interim rates will remain in effect on a refundable basis until the NPSC issues a final order.

EPA Rules

On April 25, 2024, the EPA released GHG Rules for existing coal-fired facilities and new coal and natural gas-fired facilities as well as MATS Rules. Compliance with the rules will require expensive upgrades at Colstrip Units 3 and 4 with proposed compliance dates that may not be achievable and / or require technology that is unproven, resulting in significant impacts to costs of the facilities. The final MATS and GHG Rules require compliance as early as 2027 and 2032, respectively. See Note 10 - Commitments and Contingencies to the Condensed Consolidated Financial Statements included herein for additional information regarding these rules.

Acquisition of Energy West Montana Assets

On July 29, 2024, we entered into an Asset Purchase Agreement with Hope Utilities to acquire its Energy West natural gas utility distribution system and operations serving approximately 33,000 customers located near Great Falls, Cut Bank, and West Yellowstone, Montana for approximately $39.0 million in cash, subject to certain working capital and other agreed upon closing adjustments. The transaction is subject to a number of customary closing conditions, including MPSC approval, and we expect the acquisition to be completed by the end of the first quarter of 2025.

Colstrip - Puget Sound Energy Transaction

On July 30, 2024, we entered into a definitive agreement (the Agreement) with Puget Sound Energy (Puget) to acquire Puget's 25 percent interest in each of Units 3 and 4 (collectively representing 370 megawatts) at the Colstrip Generating Station for $0. The acquisition would be effective December 31, 2025, subject to the satisfaction of the closing conditions contained within the Agreement. Under the terms of the Agreement, we will be responsible for operating costs starting on January 1, 2026; while Puget will retain responsibility for its pre-closing share of environmental and pension liabilities attributed to events or conditions existing prior to the closing of the transaction and for any future decommission and demolition costs associated with the existing facilities that comprise Puget's interest. The Agreement is subject to customary conditions and approvals.
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The ultimate amount of Puget's ownership interest we acquire is contingent on a right-of-first-refusal held by other Colstrip owners which, if exercised prior to expiration in fourth quarter 2024, would reduce our acquired interest proportionately.

Acquisition of Puget’s entire ownership interest, in addition to the previously disclosed acquisition of Avista’s 15 percent interest in each of Colstrip Units 3 and 4 (collectively representing 222 megawatts), would result in our ownership of 55 percent of the facility with the ability to guide operating and maintenance investments. This provides capacity to help us meet our obligation to provide reliable and cost effective power to our customers in Montana, while allowing opportunity for us to identify and plan for newer lower or no-carbon technologies in the future.

Regional Transmission Development Activities

In August 2024, the U.S. Department of Energy awarded a $700.0 million grant through the Grid Resilience and Innovation Partnership (GRIP) program to advance the North Plains Connector (NPC) Consortium project. The 415-mile, high-voltage direct-current transmission line is intended to connect Montana's Colstrip substation, of which we are the operator and a joint owner, to central North Dakota, bridging the eastern and western U.S. energy grids. The NPC Consortium includes potential upgrades to our jointly owned Colstrip Transmission System and $70.0 million of the award is earmarked for the Colstrip Transmission System Upgrade. The NPC project, estimated to be a $3.6 billion investment, aims to enhance grid reliability, support renewable energy integration, and provide additional capacity across multiple states. We collaborated with Grid United, the Montana Department of Commerce, and other regional utilities on the successful GRIP grant application. The project is a critical infrastructure investment that aligns with our commitment to providing reliable and affordable energy to our customers while also supporting broader grid resilience efforts in the region. In addition to the Colstrip Transmission System Upgrade, we are considering an investment in NPC and are engaged in regional transmission development activities.
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RESULTS OF OPERATIONS

Our consolidated results include the results of our divisions and subsidiaries constituting each of our business segments. The overall consolidated discussion is followed by a detailed discussion of utility margin by segment.

Factors Affecting Results of Operations

Our revenues may fluctuate substantially with changes in supply costs, which are generally collected in rates from customers. In addition, various regulatory agencies approve the prices for electric and natural gas utility service within their respective jurisdictions and regulate our ability to recover costs from customers.

Revenues are also impacted by customer growth and usage, the latter of which is primarily affected by weather and the impact of energy efficiency initiatives and investment. Very cold winters increase demand for natural gas and to a lesser extent, electricity, while warmer than normal summers increase demand for electricity, especially among our residential and commercial customers. We measure this effect using degree-days, which is the difference between the average daily actual temperature and a baseline temperature of 65 degrees. Heating degree-days result when the average daily temperature is less than the baseline. Cooling degree-days result when the average daily temperature is greater than the baseline. The statistical weather information in our regulated segments represents a comparison of this data.

Fuel, purchased supply and direct transmission expenses are costs directly associated with the generation and procurement of electricity and natural gas. These costs are generally collected in rates from customers and may fluctuate substantially with market prices and customer usage.

Operating and maintenance expenses are costs associated with the ongoing operation of our vertically-integrated utility facilities which provide electric and natural gas utility products and services to our customers. Among the most significant of these costs are those associated with direct labor and supervision, repair and maintenance expenses, and contract services. These costs are normally fairly stable across broad volume ranges and therefore do not normally increase or decrease significantly in the short term with increases or decreases in volumes.

OVERALL CONSOLIDATED RESULTS

Three Months Ended September 30, 2024 Compared with the Three Months Ended September 30, 2023

Consolidated net income for the three months ended September 30, 2024 was $46.8 million as compared with $29.3 million for the same period in 2023. This increase was primarily due to new base rates in Montana and South Dakota, electric transmission revenues, electric retail volumes, Montana property tax tracker collections, lower non-recoverable Montana electric supply costs, and a income tax benefit from a change to the gas repairs safe harbor method. These were offset in part by natural gas retail volumes, depreciation, operating, administrative and general costs, and interest expense.

Consolidated gross margin for the three months ended September 30, 2024 was $102.8 million as compared with $83.5 million in 2023, an increase of $19.3 million, or 23.1 percent. This increase was primarily due to new base rates in Montana and South Dakota, electric transmission revenues, electric retail volumes, Montana property tax tracker collections, and lower non-recoverable Montana electric supply costs. These were offset in part by natural gas retail volumes, depreciation, and operating and maintenance costs.
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Electric Natural Gas Total
2024 2023 2024 2023 2024 2023
(in millions)
Reconciliation of gross margin to utility margin:
Operating Revenues $ 306.5  $ 280.0  $ 38.7  $ 41.1  $ 345.2  $ 321.1 
Less: Fuel, purchased supply and direct transmission expense (exclusive of depreciation and depletion shown separately below) 80.8  78.0  7.1  10.9  87.9  88.9 
Less: Operating and maintenance 42.5  40.0  13.4  13.2  55.9  53.2 
Less: Property and other taxes 32.3  33.7  9.3  9.6  41.6  43.3 
Less: Depreciation and depletion 47.6  43.3  9.4  8.9 57.0  52.2 
Gross Margin 103.3  85.0  (0.5) (1.5) 102.8  83.5 
Operating and maintenance 42.5  40.0  13.4  13.2  55.9  53.2 
Property and other taxes 32.3  33.7  9.3  9.6  41.6  43.3 
Depreciation and depletion 47.6  43.3  9.4  8.9  57.0  52.2 
Utility Margin(1)
$ 225.7  $ 202.0  $ 31.6  $ 30.2  $ 257.3  $ 232.2 
(1) Non-GAAP financial measure. See “Non-GAAP Financial Measure” above.


  Three Months Ended September 30,
  2024 2023 Change % Change
  (dollars in millions)
Utility Margin        
Electric $ 225.7  $ 202.0  $ 23.7  11.7  %
Natural Gas 31.6  30.2  1.4  4.6 
Total Utility Margin(1)
$ 257.3  $ 232.2  $ 25.1  10.8  %
(1) Non-GAAP financial measure. See “Non-GAAP Financial Measure” above.

Consolidated utility margin for the three months ended September 30, 2024 was $257.3 million as compared with $232.2 million for the same period in 2023, an increase of $25.1 million, or 10.8 percent. Primary components of the change in utility margin include the following (in millions):
  Utility Margin 2024 vs. 2023
Utility Margin Items Impacting Net Income
Base rates
$ 17.2 
Transmission revenue due to market conditions and rates
5.9 
Electric retail volumes
3.6 
Montana property tax tracker collections 1.5 
Montana natural gas transportation
0.9 
Non-recoverable Montana electric supply costs
0.6 
Natural gas retail volumes
(0.3)
Other (1.2)
Change in Utility Margin Items Impacting Net Income 28.2 
Utility Margin Items Offset Within Net Income
Property and other taxes recovered in revenue, offset in property and other taxes
(2.0)
Operating expenses recovered in revenue, offset in operating and maintenance expense
(0.9)
Production tax credits, offset in income tax expense
(0.2)
Change in Utility Margin Items Offset Within Net Income (3.1)
Increase in Consolidated Utility Margin(1)
$ 25.1 
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(1) Non-GAAP financial measure. See “Non-GAAP Financial Measure” above.

Higher electric retail volumes were driven by favorable weather in Montana impacting residential demand, higher commercial and industrial demand, and customer growth in all jurisdictions, partly offset by unfavorable weather in South Dakota impacting residential demand. Lower natural gas retail volumes were driven by unfavorable weather in Montana partly offset by customer growth in all jurisdictions.

Under the PCCAM, net supply costs higher or lower than the PCCAM base rate (PCCAM Base) (excluding qualifying facility (QF) costs) are allocated 90 percent to Montana customers and 10 percent to shareholders. For the three months ended September 30, 2024, we over-collected supply costs of $5.9 million resulting in a reduction to our under collection of costs, and recorded an increase in pre-tax earnings of $0.7 million (10 percent of the PCCAM Base cost variance). For the three months ended September 30, 2023, we over-collected supply costs of $1.0 million resulting in a reduction to our under collection of costs, and recorded an increase in pre-tax earnings of $0.1 million.

  Three Months Ended September 30,
  2024 2023 Change % Change
  (dollars in millions)
Operating Expenses (excluding fuel, purchased supply and direct transmission expense)        
Operating and maintenance $ 55.9  $ 53.2  $ 2.7  5.1  %
Administrative and general 34.9  29.4  5.5  18.7 
Property and other taxes 41.6  41.8  (0.2) (0.5)
Depreciation and depletion 57.0  52.2  4.8  9.2 
Total Operating Expenses (excluding fuel, purchased supply and direct transmission expense) $ 189.4  $ 176.6  $ 12.8  7.2  %
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Consolidated operating expenses, excluding fuel, purchased supply and direct transmission expense, were $189.4 million for the three months ended September 30, 2024, as compared with $176.6 million for the three months ended September 30, 2023. Primary components of the change include the following (in millions):
  Operating Expenses
  2024 vs. 2023
Operating Expenses (excluding fuel, purchased supply and direct transmission expense) Impacting Net Income
Depreciation expense due to plant additions and higher depreciation rates
$ 4.8 
Insurance expense, primarily due to increased wildfire risk premiums
3.4 
Labor and benefits(1)
3.0 
Electric generation maintenance
1.9 
Property and other taxes not recoverable within trackers 1.9 
Technology implementation and maintenance expenses
(0.1)
Partial recovery from previously impaired alternative energy storage investment
(0.5)
Uncollectible accounts
(1.1)
Other (1.1)
Change in Items Impacting Net Income 12.2 
Operating Expenses Offset Within Net Income
Property and other taxes recovered in trackers, offset in revenue
(2.0)
Operating and maintenance expenses recovered in trackers, offset in revenue
(0.9)
Deferred compensation, offset in other income
2.8 
Pension and other postretirement benefits, offset in other income(1)
0.7 
Change in Items Offset Within Net Income 0.6 
Increase in Operating Expenses (excluding fuel, purchased supply and direct transmission expense) $ 12.8 
(1) In order to present the total change in labor and benefits, we have included the change in the non-service cost component of our pension and other postretirement benefits, which is recorded within other income on our Condensed Consolidated Statements of Income. This change is offset within this table as it does not affect our operating expenses.

We estimate property taxes throughout each year, and update those estimates based on valuation reports received from the Montana Department of Revenue. Under Montana law, we are allowed to track the increases and decreases in the actual level of state and local taxes and fees and adjust our rates to recover the increase or decrease between rate cases less the amount allocated to FERC-jurisdictional customers and net of the associated income tax benefit.

Consolidated operating income for the three months ended September 30, 2024 was $67.9 million as compared with $55.6 million in the same period of 2023. This increase was primarily due to new base rates in Montana and South Dakota, electric transmission revenues, electric retail volumes, Montana property tax tracker collections, and lower non-recoverable Montana electric supply costs. These were offset in part by natural gas retail volumes, depreciation, operating, and administrative and general expenses.

Consolidated interest expense was $33.4 million for the three months ended September 30, 2024 as compared with $28.7 million for the same period of 2023. This increase was due to higher borrowings and interest rates, partly offset by higher capitalization of Allowance for Funds Used During Construction (AFUDC).

Consolidated other income was $9.1 million for the three months ended September 30, 2024 as compared with $4.1 million for the same period of 2023. This increase was primarily due to higher capitalization of AFUDC, a decrease in the non-service component of pension expense, and an increase in the value of deferred shares held in trust for deferred compensation.

Consolidated income tax benefit was $3.2 million for the three months ended September 30, 2024 as compared to income tax expense of $1.7 million for the same period of 2023. Our effective tax rate for the three months ended September 30, 2024 was (7.3)% as compared with 5.5% for the same period in 2023. As further discussed in Note 3 - Income Taxes, during the third quarter of 2024 we filed a tax accounting method change with the IRS consistent with the guidance for natural gas transmission and distribution property.
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This resulted in an income tax benefit of $7.0 million during the three months ended September 30, 2024, related to repair costs that were previously capitalized for tax purposes in the 2022 and prior tax years.

The following table summarizes the differences between our effective tax rate and the federal statutory rate (in millions):
  Three Months Ended September 30,
2024 2023
Income Before Income Taxes $ 43.7  $ 31.0 
Income tax calculated at federal statutory rate 9.2  21.0  % 6.5  21.0  %
Permanent or flow-through adjustments:
State income tax, net of federal provisions 0.1  0.1  0.1  0.4 
Gas repairs safe harbor method change (7.0) (16.0) —  — 
Flow-through repairs deductions (4.6) (10.5) (4.2) (13.5)
Production tax credits (2.4) (5.6) (1.3) (4.1)
Amortization of excess deferred income tax (0.2) (0.5) (0.3) (1.0)
Income tax return to accrual adjustment —  —  0.4  1.3 
Plant and depreciation flow-through items 1.8  4.2  0.4  1.2 
Other, net (0.1) —  0.1  0.2 
(12.4) (28.3) (4.8) (15.5)
Income tax (benefit) expense $ (3.2) (7.3) % $ 1.7  5.5  %

We compute income tax expense for each quarter based on the estimated annual effective tax rate for the year, adjusted for certain discrete items. Our effective tax rate typically differs from the federal statutory tax rate primarily due to the regulatory impact of flowing through federal and state tax benefits of repairs deductions, state tax benefit of accelerated tax depreciation deductions (including bonus depreciation when applicable) and production tax credits.

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Nine Months Ended September 30, 2024 Compared with the Nine Months Ended September 30, 2023

Consolidated net income for the nine months ended September 30, 2024 was $143.6 million as compared with $111.0 million for the same period in 2023. This increase was primarily due to new base rates in Montana and South Dakota, electric transmission revenues, Montana property tax tracker collections, electric retail volumes, and an income tax benefit from a change to the gas repairs safe harbor method. These were offset in part by non-recoverable Montana electric supply costs, a less favorable QF liability adjustment in the current year, natural gas retail volumes, depreciation, operating, administrative and general costs, and interest expense.
Consolidated gross margin for the nine months ended September 30, 2024 was $338.3 million as compared with $289.8 million in 2023, an increase of $48.5 million, or 16.7 percent. This increase was primarily due to new base rates in Montana and South Dakota, electric transmission revenues, Montana property tax tracker collections, and electric retail volumes. These were offset in part by non-recoverable Montana electric supply costs, a less favorable QF liability adjustment in the current year, natural gas retail volumes, depreciation, and operating and maintenance costs.

Electric Natural Gas Total
2024 2023 2024 2023 2024 2023
(in millions)
Reconciliation of gross margin to utility margin:
Operating Revenues $ 909.8  $ 804.6  $ 230.6  $ 261.5  $ 1,140.4  $ 1,066.1 
Less: Fuel, purchased supply and direct transmission expense (exclusive of depreciation and depletion shown separately below) 257.0  198.5  82.1  123.5  339.1  322.0 
Less: Operating and maintenance 126.3  123.8  41.1  40.1  167.4  163.9 
Less: Property and other taxes 96.6  103.0  28.4  29.6  125.0  132.6 
Less: Depreciation and depletion 142.4  130.5  28.2  27.3 170.6  157.8 
Gross Margin 287.5  248.8  50.8  41.0  338.3  289.8 
Operating and maintenance 126.3  123.8  41.1  40.1  167.4  163.9 
Property and other taxes 96.6  103.0  28.4  29.6  125.0  132.6 
Depreciation and depletion 142.4  130.5  28.2  27.3  170.6  157.8 
Utility Margin(1)
$ 652.8  $ 606.1  $ 148.5  $ 138.0  $ 801.3  $ 744.1 
(1) Non-GAAP financial measure. See “Non-GAAP Financial Measure” above.

  Nine Months Ended September 30,
  2024 2023 Change % Change
  (dollars in millions)
Utility Margin        
Electric $ 652.8  $ 606.1  $ 46.7  7.7  %
Natural Gas 148.5  138.0  10.5  7.6 
Total Utility Margin(1)
$ 801.3  $ 744.1  $ 57.2  7.7  %
(1) Non-GAAP financial measure. See “Non-GAAP Financial Measure” above.

Consolidated utility margin for the nine months ended September 30, 2024 was $801.3 million as compared with $744.1 million for the same period in 2023, an increase of $57.2 million, or 7.7 percent. Primary components of the change in utility margin include the following (in millions):
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Utility Margin 2024 vs. 2023
Utility Margin Items Impacting Net Income
Base rates
$ 53.4 
Transmission revenue due to market conditions and rates 13.5 
Montana property tax tracker collections(1)
4.9 
Montana natural gas transportation
1.9 
Electric retail volumes
1.0 
QF liability adjustment (4.2)
Non-recoverable Montana electric supply costs
(3.8)
Natural gas retail volumes
(2.7)
Other 2.4 
Change in Utility Margin Items Impacting Net Income 66.4 
Utility Margin Items Offset Within Net Income
Property and other taxes recovered in revenue, offset in property and other taxes
(8.2)
Production tax credits, offset in income tax expense
(1.5)
Operating expenses recovered in revenue, offset in operating and maintenance expense
0.5 
Change in Utility Margin Items Offset Within Net Income (9.2)
Increase in Consolidated Utility Margin(2)
$ 57.2 
(1) In the fourth quarter of 2023, upon receiving the final valuation reports from the Montana Department of Revenue, we recorded a significant reduction in property tax expense. Accordingly, we do not anticipate this year-to-date favorable change to Utility Margin to continue on a full year basis.
(2) Non-GAAP financial measure. See “Non-GAAP Financial Measure” above.

Under the PCCAM, net supply costs higher or lower than the PCCAM Base (excluding qualifying facility (QF) costs) are allocated 90 percent to Montana customers and 10 percent to shareholders. For the nine months ended September 30, 2024, we under-collected supply costs of $10.1 million resulting in an increase to our under collection of costs, and recorded a decrease in pre-tax earnings of $1.2 million (10 percent of the PCCAM Base cost variance). For the nine months ended September 30, 2023, we over-collected supply costs of $23.5 million resulting in a reduction to our under collection of costs, and recorded an increase in pre-tax earnings of $2.6 million.

Electric retail volume impact was favorable due to higher residential usage in Montana due to favorable weather, higher industrial volumes, and customer growth, partly offset by lower residential usage due to unfavorable weather in South Dakota, and lower commercial demand. Lower natural gas retail volumes were driven by unfavorable weather in all jurisdictions partly offset by customer growth.

The adjustment to our electric QF liability (unrecoverable costs associated with PURPA contracts as part of a 2002 stipulation with the MPSC and other parties) reflects a $0.8 million gain in 2024, as compared with a $5.0 million gain for the same period in 2023, as further explained above in the consolidated results of operations for the three months ended June 30, 2024.

  Nine Months Ended September 30,
  2024 2023 Change % Change
  (dollars in millions)
Operating Expenses (excluding fuel, purchased supply and direct transmission expense)        
Operating and maintenance $ 167.4  $ 163.9  $ 3.5  2.1  %
Administrative and general 106.7  94.1  12.6  13.4 
Property and other taxes 125.0  131.0  (6.0) (4.6)
Depreciation and depletion 170.6  157.8  12.8  8.1 
Total Operating Expenses (excluding fuel, purchased supply and direct transmission expense) $ 569.7  $ 546.8  $ 22.9  4.2  %
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Consolidated operating expenses, excluding fuel, purchased supply and direct transmission expense, were $569.7 million for the nine months ended September 30, 2024, as compared with $546.8 million for the nine months ended September 30, 2023. Primary components of the change include the following (in millions):
  Operating Expenses
 
2024 vs. 2023
Operating Expenses (excluding fuel, purchased supply and direct transmission expense) Impacting Net Income
Depreciation expense due to plant additions and higher depreciation rates
$ 12.8 
Labor and benefits(1)
6.4 
Insurance expense, primarily due to increased wildfire risk premiums
4.4 
Litigation outcome (Pacific Northwest Solar) 2.4 
Property and other taxes not recoverable within trackers
2.2 
Non-cash impairment of alternative energy storage investment 1.7 
Electric generation maintenance
1.3 
Technology implementation and maintenance expenses
0.5 
Uncollectible accounts
(2.1)
Other (2.4)
Change in Items Impacting Net Income 27.2 
Operating Expenses Offset Within Net Income
Property and other taxes recovered in trackers, offset in revenue
(8.2)
Deferred compensation, offset in other income
2.9 
Pension and other postretirement benefits, offset in other income(1)
0.5 
Operating and maintenance expenses recovered in trackers, offset in revenue
0.5 
Change in Items Offset Within Net Income (4.3)
Increase in Operating Expenses (excluding fuel, purchased supply and direct transmission expense) $ 22.9 
(1) In order to present the total change in labor and benefits, we have included the change in the non-service cost component of our pension and other postretirement benefits, which is recorded within other income on our Condensed Consolidated Statements of Income. This change is offset within this table as it does not affect our operating expenses.

Consolidated operating income for the nine months ended September 30, 2024 was $231.6 million as compared with $197.3 million in the same period of 2023. This increase was primarily due to new base rates in Montana and South Dakota, electric transmission revenues, Montana property tax tracker collections, and electric retail volumes. These were offset in part by non-recoverable Montana electric supply costs, a less favorable QF liability adjustment in the current year, natural gas retail volumes, depreciation, operating, and administrative and general costs.

Consolidated interest expense was $96.3 million for the nine months ended September 30, 2024 as compared with $85.1 million for the same period of 2023. This increase was due to higher borrowings and interest rates partly offset by higher capitalization of AFUDC.

Consolidated other income was $19.6 million for the nine months ended September 30, 2024 as compared to $12.9 million during the same period of 2023. This increase was primarily due a $2.3 million reversal of a previously expensed Community Renewable Energy Project penalty due to a favorable legal ruling, higher capitalization of AFUDC, a decrease in the non-service component of pension expense, and an increase in the value of deferred shares held in trust for deferred compensation, partly offset by a $2.5 million non-cash impairment of an alternative energy storage equity investment.

Consolidated income tax expense for the nine months ended September 30, 2024 was $11.4 million as compared to $14.1 million in the same period of 2023. Our effective tax rate for the nine months ended September 30, 2024 was 7.4% as compared with 11.3% for the same period in 2023. As further discussed in Note 3 - Income Taxes, during the third quarter of 2024 we filed a tax accounting method change with the IRS consistent with the guidance for natural gas transmission and distribution property. This resulted in an income tax benefit of $7.0 million during the nine months ended September 30, 2024, related to repair costs that were previously capitalized for tax purposes in the 2022 and prior tax years. Income tax expense for the nine months ended September 30, 2023 includes a one-time $3.2 million charge for the reduction of previously claimed alternative minimum tax credits.
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The following table summarizes the differences between our effective tax rate and the federal statutory rate (in millions):
  Nine Months Ended September 30,
2024 2023
Income Before Income Taxes $ 155.0  $ 125.1 
Income tax calculated at federal statutory rate 32.5  21.0  % 26.3  21.0  %
Permanent or flow-through adjustments:
State income tax, net of federal provisions 0.7  0.5  1.4  1.1 
Flow-through repairs deductions (13.8) (8.9) (11.7) (9.4)
Production tax credits (7.4) (4.8) (5.6) (4.5)
Gas repairs safe harbor method change (7.0) (4.5) —  — 
Amortization of excess deferred income tax (0.8) (0.5) (1.4) (1.1)
Reduction to previously claimed alternative minimum tax credit —  —  3.2  2.5 
Income tax return to accrual adjustment —  —  0.4  0.3 
Plant and depreciation flow-through items 6.0  3.8  1.2  1.0 
Share-based compensation 0.3  0.2  0.4  0.3 
Other, net 0.9  0.6  (0.1) 0.1 
(21.1) (13.6) (12.2) (9.7)
Income tax expense $ 11.4  7.4  % $ 14.1  11.3  %

We compute income tax expense for each quarter based on the estimated annual effective tax rate for the year, adjusted for certain discrete items. Our effective tax rate typically differs from the federal statutory tax rate primarily due to the regulatory impact of flowing through federal and state tax benefits of repairs deductions, state tax benefit of accelerated tax depreciation deductions (including bonus depreciation when applicable) and production tax credits.


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ELECTRIC SEGMENT

We have various classifications of electric revenues, defined as follows:

•Retail: Sales of electricity to residential, commercial and industrial customers, and the impact of regulatory
mechanisms.
•Regulatory amortization: Primarily represents timing differences for electric supply costs and property taxes between when we incur these costs and when we recover these costs in rates from our customers, which is also reflected in fuel, purchased supply and direct transmission expense and therefore has minimal impact on utility margin. The amortization of these amounts are offset in retail revenue.
•Transmission: Reflects transmission revenues regulated by the FERC.
•Wholesale and other are largely utility margin neutral as they are offset by changes in fuel, purchased supply and direct transmission expense.

Three Months Ended September 30, 2024 Compared with the Three Months Ended September 30, 2023
  Revenues Change Megawatt Hours (MWH) Avg. Customer Counts
  2024 2023 $ % 2024 2023 2024 2023
  (in thousands)    
Montana $ 100,737  $ 96,812  $ 3,925  4.1  % 685  664  328,962  322,832 
South Dakota 19,062  17,951  1,111  6.2  145  151  51,393  51,236 
Residential  119,799  114,763  5,036  4.4  830  815  380,355  374,068 
Montana 109,655  110,100  (445) (0.4) 830  825  75,857  74,385 
South Dakota 30,053  27,474  2,579  9.4  288  289  13,115  12,989 
Commercial 139,708  137,574  2,134  1.6  1,118  1,114  88,972  87,374 
Industrial 11,852  11,423  429  3.8  726  691  80  79 
Other 14,071  13,243  828  6.3  82  71  8,274  8,204 
Total Retail Electric $ 285,430  $ 277,003  $ 8,427  3.0  % 2,756  2,691  477,681  469,725 
Regulatory amortization (6,805) (18,534) 11,729  (63.3)
Transmission 25,750  19,847  5,903  29.7 
Wholesale and Other 2,103  1,714  389  22.7 
Total Revenues $ 306,478  $ 280,030  $ 26,448  9.4  %
Fuel, purchased supply and direct transmission expense(1)
80,761  77,995  2,766  3.5 
Utility Margin(2)
$ 225,717  $ 202,035  $ 23,682  11.7  %
(1) Exclusive of depreciation and depletion.
(2) Non-GAAP financial measure. See “Non-GAAP Financial Measure” above. Also see "Overall Consolidated Results" above for reconciliation of gross margin to utility margin.


  Cooling Degree Days 2024 as compared with:
2024 2023 Historic Average 2023 Historic Average
Montana 441 396 385 11% warmer 15% warmer
South Dakota 628 744 635 16% cooler 1% cooler
  Heating Degree Days
2024 as compared with:
2024 2023 Historic Average 2023 Historic Average
Montana(1)
169 190 280 11% warmer 40% warmer
South Dakota 39 25 76 56% colder 49% warmer
(1) Montana electric and natural gas heating degree days may differ due to differences in service territory.
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The following summarizes the components of the changes in electric utility margin for the three months ended September 30, 2024 and 2023 (in millions):
 
Utility Margin 2024 vs. 2023
Utility Margin Items Impacting Net Income
Base rates
$ 15.2 
Transmission revenue due to market conditions and rates 5.9 
Retail volumes
3.6 
Montana property tax tracker collections 1.2 
Non-recoverable Montana electric supply costs 0.6 
Other 0.2 
Change in Utility Margin Items Impacting Net Income 26.7 
Utility Margin Items Offset Within Net Income
Property and other taxes recovered in revenue, offset in property and other taxes
(1.9)
Operating expenses recovered in revenue, offset in operating and maintenance expense
(0.9)
Production tax credits, offset in income tax expense
(0.2)
Change in Utility Margin Items Offset Within Net Income (3.0)
Increase in Utility Margin(1)
$ 23.7 
(1) Non-GAAP financial measure. See "Non-GAAP Financial Measure" above. Also see "Overall Consolidated Results" above for reconciliation of gross margin to utility margin.

Higher electric retail volumes were driven by favorable weather in Montana impacting residential demand, higher commercial and industrial demand, and customer growth in all jurisdictions, partly offset by unfavorable weather in South Dakota impacting residential demand.

Under the PCCAM, net supply costs higher or lower than the PCCAM base rate (PCCAM Base) (excluding qualifying facility (QF) costs) are allocated 90 percent to Montana customers and 10 percent to shareholders. For the three months ended September 30, 2024, we over-collected supply costs of $5.9 million resulting in a reduction to our under collection of costs, and recorded an increase in pre-tax earnings of $0.7 million (10 percent of the PCCAM Base cost variance). For the three months ended September 30, 2023, we over-collected supply costs of $1.0 million resulting in a reduction to our under collection of costs, and recorded an increase in pre-tax earnings of $0.1 million.

The change in regulatory amortization revenue is primarily due to timing differences between when we incur electric supply costs and property taxes and when we recover these costs in rates from our customers, which has a minimal impact on utility margin. Our wholesale and other revenues are largely utility margin neutral as they are offset by changes in fuel, purchased supply and direct transmission expenses.


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Nine Months Ended September 30, 2024 Compared with the Nine Months Ended September 30, 2023
  Revenues Change Megawatt Hours (MWH) Avg. Customer Counts
  2024 2023 $ % 2024 2023 2024 2023
  (in thousands)    
Montana $ 304,128  $ 306,114  $ (1,986) (0.6) % 2,114  2,103  327,644  321,797 
South Dakota 53,764  53,408  356  0.7  435  481  51,395  51,224 
Residential  357,892  359,522  (1,630) (0.5) 2,549  2,584  379,039  373,021 
Montana 310,813  324,632  (13,819) (4.3) 2,410  2,435  75,712  74,294 
South Dakota 84,182  77,736  6,446  8.3  834  834  13,070  12,972 
Commercial 394,995  402,368  (7,373) (1.8) 3,244  3,269  88,782  87,266 
Industrial 34,803  33,986  817  2.4  2,190  1,961  80  79 
Other 27,437  27,229  208  0.8  131  119  6,552  6,483 
Total Retail Electric $ 815,127  $ 823,105  $ (7,978) (1.0) % 8,114  7,933  474,453  466,849 
Regulatory amortization 18,637  (80,085) 98,722  (123.3)
Transmission 70,573  57,092  13,481  23.6 
Wholesale and Other 5,461  4,492  969  21.6 
Total Revenues $ 909,798  $ 804,604  $ 105,194  13.1  %
Fuel, purchased supply and direct transmission expense(1)
256,989  198,492  58,497  29.5 
Utility Margin(2)
$ 652,809  $ 606,112  $ 46,697  7.7  %
(1) Exclusive of depreciation and depletion.
(2) Non-GAAP financial measure. See “Non-GAAP Financial Measure” above. Also see "Overall Consolidated Results" above for reconciliation of gross margin to utility margin.

  Cooling Degree Days
2024 as compared with:
2024 2023 Historic Average 2023 Historic Average
Montana(1)
484 440 447 10% warmer 8% warmer
South Dakota 682 945 707 28% cooler 4% cooler
  Heating Degree Days
2024 as compared with:
2024 2023 Historic Average 2023 Historic Average
Montana(1)
4,661 4,746 4,755 2% warmer 2% warmer
South Dakota 4,847 5,982 5,730 19% warmer 15% warmer
(1) Montana electric and natural gas heating degree days may differ due to differences in service territory.
39


The following summarizes the components of the changes in electric utility margin for the nine months ended September 30, 2024 and 2023 (in millions):
 
Utility Margin 2024 vs. 2023
Utility Margin Items Impacting Net Income
Base rates
$ 43.2 
Transmission revenue due to market conditions and rates 13.5 
Montana property tax tracker collections 3.9 
Retail volumes
1.0 
QF liability adjustment (4.2)
Non-recoverable Montana electric supply costs
(3.8)
Other 1.6 
Change in Utility Margin Items Impacting Net Income 55.2 
Utility Margin Items Offset Within Net Income
Property and other taxes recovered in revenue, offset in property and other taxes
(7.5)
Production tax credits, offset in income tax expense
(1.5)
Operating expenses recovered in revenue, offset in operating and maintenance expense
0.5 
Change in Utility Margin Items Offset Within Net Income (8.5)
Increase in Utility Margin(1)
$ 46.7 
(1) Non-GAAP financial measure. See "Non-GAAP Financial Measure" above. Also see "Overall Consolidated Results" above for reconciliation of gross margin to utility margin.

Electric retail volume impact was favorable due to higher residential usage in Montana due to favorable weather, higher industrial volumes, and customer growth, partly offset by lower residential usage in South Dakota due to unfavorable weather, and lower commercial demand.

Under the PCCAM, net supply costs higher or lower than the PCCAM Base (excluding qualifying facility (QF) costs) are allocated 90 percent to Montana customers and 10 percent to shareholders. For the nine months ended September 30, 2024, we under-collected supply costs of $10.1 million resulting in an increase to our under collection of costs, and recorded a decrease in pre-tax earnings of $1.2 million (10 percent of the PCCAM Base cost variance). For the nine months ended September 30, 2023, we over-collected supply costs of $23.5 million resulting in a reduction to our under collection of costs, and recorded an increase in pre-tax earnings of $2.6 million.

The adjustment to our electric QF liability (unrecoverable costs associated with PURPA contracts as part of a 2002 stipulation with the MPSC and other parties) reflects a $0.8 million gain in 2024, as compared with a $5.0 million gain for the same period in 2023, as further explained above in the consolidated results of operations for the nine months ended September 30, 2024.

The change in regulatory amortization revenue is due to timing differences between when we incur electric supply costs and when we recover these costs in rates from our customers, which has a minimal impact on utility margin. Our wholesale and other revenues are largely utility margin neutral as they are offset by changes in fuel, purchased supply and direct transmission expenses.

40



NATURAL GAS SEGMENT

We have various classifications of natural gas revenues, defined as follows:

•Retail: Sales of natural gas to residential, commercial and industrial customers, and the impact of regulatory mechanisms.
•Regulatory amortization: Primarily represents timing differences for natural gas supply costs and property taxes between when we incur these costs and when we recover these costs in rates from our customers, which is also reflected in fuel, purchased supply and direct transmission expenses and therefore has minimal impact on utility margin. The amortization of these amounts are offset in retail revenue.
•Wholesale: Primarily represents transportation and storage for others.

Three Months Ended September 30, 2024 Compared with the Three Months Ended September 30, 2023
  Revenues Change Dekatherms (Dkt) Avg. Customer Counts
  2024 2023 $ % 2024 2023 2024 2023
  (in thousands)    
Montana $ 8,422  $ 9,603  $ (1,181) (12.3) % 739  825  185,578  183,586 
South Dakota 1,745  1,987  (242) (12.2) 108  102  42,389  41,821 
Nebraska 1,791  2,251  (460) (20.4) 143  138  37,834  37,580 
Residential 11,958  13,841  (1,883) (13.6) 990  1,065  265,801  262,987 
Montana 6,190  6,136  54  0.9  609  622  26,094  25,657 
South Dakota 1,262  1,498  (236) (15.8) 225  208  7,336  7,184 
Nebraska 795  1,291  (496) (38.4) 134  142  5,009  4,970 
Commercial 8,247  8,925  (678) (7.6) 968  972  38,439  37,811 
Industrial 115  106  8.5  15  13  238  231 
Other 169  160  5.6  23  19  196  191 
Total Retail Gas $ 20,489  $ 23,032  $ (2,543) (11.0) % 1,996  2,069  304,674  301,220 
Regulatory amortization 8,025  7,458  567  (7.6)
Wholesale and other 10,169  10,570  (401) (3.8)
Total Revenues $ 38,683  $ 41,060  $ (2,377) (5.8) %
Fuel, purchased supply and direct transmission expense(1)
7,127  10,948  (3,821) (34.9)
Utility Margin(2)
$ 31,556  $ 30,112  $ 1,444  4.8  %
(1) Exclusive of depreciation and depletion.
(2) Non-GAAP financial measure. See “Non-GAAP Financial Measure” above. Also see "Overall Consolidated Results" above for reconciliation of gross margin to utility margin.

  Heating Degree Days
2024 as compared with:
2024 2023 Historic Average 2023 Historic Average
Montana(1)
203 226 319 10% warmer 36% warmer
South Dakota 39 25 76 56% colder 49% warmer
Nebraska 7 15 33 53% warmer 79% warmer
(1) Montana electric and natural gas heating degree days may differ due to differences in service territory.

41


The following summarizes the components of the changes in natural gas utility margin for the three months ended September 30, 2024 and 2023:
 
Utility Margin 2024 vs. 2023
  (in millions)
Utility Margin Items Impacting Net Income
Base rates
$ 2.0 
Montana natural gas transportation
0.9 
Montana property tax tracker collections 0.3 
Retail volumes
(0.3)
Other (1.4)
Change in Utility Margin Items Impacting Net Income 1.5 
Utility Margin Items Offset Within Net Income
Property and other taxes recovered in revenue, offset in property and other taxes
(0.1)
Change in Utility Margin Items Offset Within Net Income (0.1)
Increase in Utility Margin(1)
$ 1.4 
(1) Non-GAAP financial measure. See "Non-GAAP Financial Measure" above. Also see "Overall Consolidated Results" above for reconciliation of gross margin to utility margin.

Lower retail volumes were driven by unfavorable weather in Montana partly offset by customer growth in all jurisdictions.


42


Nine Months Ended September 30, 2024 Compared with the Nine Months Ended September 30, 2023
  Revenues Change Dekatherms (Dkt) Avg. Customer Counts
  2024 2023 $ % 2024 2023 2024 2023
  (in thousands)    
Montana $ 75,933  $ 94,074  $ (18,141) (19.3) % 9,220  9,206  185,412  183,584 
South Dakota 21,244  30,297  (9,053) (29.9) 2,113  2,557  42,477  41,962 
Nebraska 16,106  30,221  (14,115) (46.7) 1,812  2,053  37,924  37,752 
Residential 113,283  154,592  (41,309) (26.7) 13,145  13,816  265,813  263,298 
Montana 42,016  52,393  (10,377) (19.8) 5,307  5,456  26,112  25,679 
South Dakota 14,283  21,289  (7,006) (32.9) 2,139  2,385  7,353  7,218 
Nebraska 8,982  19,119  (10,137) (53.0) 1,328  1,528  5,045  5,017 
Commercial 65,281  92,801  (27,520) (29.7) 8,774  9,369  38,510  37,914 
Industrial 703  995  (292) (29.3) 98  107  237  231 
Other 1,036  1,282  (246) (19.2) 156  155  196  189 
Total Retail Gas $ 180,303  $ 249,670  $ (69,367) (27.8) % 22,173  23,447  304,756  301,632 
Regulatory amortization 18,686  (21,312) 39,998  (187.7)
Wholesale and other 31,645  33,172  (1,527) (4.6)
Total Revenues $ 230,634  $ 261,530  $ (30,896) (11.8) %
Fuel, purchased supply and direct transmission expense(1)
82,100  123,521  (41,421) (33.5)
Utility Margin(2)
$ 148,534  $ 138,009  $ 10,525  7.6  %
(1) Exclusive of depreciation and depletion.
(2) Non-GAAP financial measure. See “Non-GAAP Financial Measure” above. Also see "Overall Consolidated Results" above for reconciliation of gross margin to utility margin.

  Heating Degree Days
2024 as compared with:
2024 2023 Historic Average 2023 Historic Average
Montana(1)
4,792 4,855 4,854 1% warmer 1% warmer
South Dakota 4,847 5,982 5,730 19% warmer 15% warmer
Nebraska 3,985 4,521 4,501 12% warmer 11% warmer
(1) Montana electric and natural gas heating degree days may differ due to differences in service territory.

43


The following summarizes the components of the changes in natural gas utility margin for the nine months ended September 30, 2024 and 2023:
 
Utility Margin 2024 vs. 2023
  (in millions)
Utility Margin Items Impacting Net Income
Base rates
$ 10.2 
Montana natural gas transportation
1.9 
Montana property tax tracker collections 1.0 
Retail volumes
(2.7)
Other 0.8 
Change in Utility Margin Items Impacting Net Income 11.2 
Utility Margin Items Offset Within Net Income
Property and other taxes recovered in revenue, offset in property tax expense (0.7)
Change in Utility Margin Items Offset Within Net Income (0.7)
Increase in Utility Margin(1)
$ 10.5 
(1) Non-GAAP financial measure. See "Non-GAAP Financial Measure" above. Also see "Overall Consolidated Results" above for reconciliation of gross margin to utility margin.

Lower retail volumes were driven by unfavorable weather in all jurisdictions partly offset by customer growth.


44


LIQUIDITY AND CAPITAL RESOURCES

Liquidity

We require liquidity to support and grow our business, and use our liquidity for working capital needs, capital expenditures, investments in or acquisitions of assets, and to repay debt. For NorthWestern Energy Group, liquidity is primarily provided through its revolving credit facility and dividends from its utility operating subsidiaries, NW Corp and NWE Public Service. These subsidiaries are subject to certain restrictions that may limit the amount of their dividend distributions. See Note 16 - Common Stock in the NorthWestern Energy Group Annual Report on Form 10-K for the year ended December 31, 2023 for further information regarding these dividend restrictions. As of September 30, 2024, we are in compliance with these provisions.

We believe our cash flows from operations, existing borrowing capacity, debt and equity issuances and future utility rate increases should be sufficient to fund our operations, service existing debt, pay dividends, and fund capital expenditures. We plan to maintain a 50 - 55 percent debt to total capital ratio excluding finance leases, and expect to continue targeting a long-term dividend payout ratio of 60 - 70 percent of earnings per share; however, there can be no assurance that we will be able to meet these targets.

As of September 30, 2024, our total net liquidity was approximately $316.5 million, including $2.5 million of cash and $314.0 million of revolving credit facility availability with no letters of credit outstanding.

Cash Flows

The following table summarizes our consolidated cash flows (in millions):
  Nine Months Ended September 30,
  2024 2023
Operating Activities    
Net income $ 143.6  $ 111.0 
Non-cash adjustments to net income 175.3  141.1 
Changes in working capital 35.9  194.5 
Other noncurrent assets and liabilities (10.9) (19.6)
Cash Provided by Operating Activities 343.9  427.0 
Investing Activities    
Property, plant and equipment additions (400.5) (407.2)
Investment in equity securities (4.6) (3.8)
Cash Used in Investing Activities (405.1) (411.0)
Financing Activities    
Proceeds from issuance of common stock, net —  73.6 
Issuance of long-term debt 215.0  300.0 
Issuances of short-term borrowings 100.0  — 
Line of credit repayments, net (32.0) (273.0)
Repayments on long-term debt (100.0) — 
Dividends on common stock (118.9) (115.0)
Other financing activities, net (0.2) (2.4)
Cash Provided by (Used in) Financing Activities 63.9  (16.8)
Increase (decrease) in Cash, Cash Equivalents, and Restricted Cash 2.7  (0.8)
Cash, Cash Equivalents, and Restricted Cash, beginning of period 25.2  22.5 
Cash, Cash Equivalents, and Restricted Cash, end of period $ 27.9  $ 21.7 

Operating Activities
45



As of September 30, 2024, cash, cash equivalents, and restricted cash were $27.9 million as compared with $25.2 million as of December 31, 2023 and $21.7 million as of September 30, 2023. Cash provided by operating activities totaled $343.9 million for the nine months ended September 30, 2024 as compared with $427.0 million during the nine months ended September 30, 2023. As shown in the table below, this decrease in operating cash flows is primarily due to significant net cash inflows in the prior period from the recovery of previously under-collected energy supply costs, compared to minimal net cash inflows for energy supply costs in the current period due to the timely recovery of energy supply costs.

Uncollected energy supply costs (in millions)
Beginning of period End of period Net cash inflows (outflows)
2023 $ 115.4  $ 16.6  $ 98.8 
2024 $ 7.8  $ 1.8  $ 6.0 
Decrease in net cash inflows $ (92.8)

Investing Activities

Cash used in investing activities totaled $405.1 million during the nine months ended September 30, 2024, as compared with $411.0 million during the nine months ended September 30, 2023. Plant additions during the first nine months of 2024 include maintenance additions of approximately $216.5 million and capacity related capital expenditures of $184.0 million. Plant additions during the first nine months of 2023 included maintenance additions of approximately $235.0 million and capacity related capital expenditures of approximately $172.2 million.

Financing Activities

Cash provided by financing activities totaled $63.9 million during the nine months ended September 30, 2024, as compared with cash used in financing activities of $16.8 million during the nine months ended September 30, 2023. During the nine months ended September 30, 2024, cash provided by financing activities reflects proceeds from the issuance of debt of $215.0 million and short-term borrowings of $100.0 million, partly offset by payment of dividends of $118.9 million, repayment of 1.00 percent, $100.0 million of Montana First Mortgage Bonds, and net repayments under our revolving lines of credit of $32.0 million. During the nine months ended September 30, 2023, cash used in financing activities reflects net repayments under our revolving lines of credit of $273.0 million and payment of dividends of $115.0 million, partly offset by proceeds from the issuance of debt of $300.0 million and proceeds received from the issuance of common stock of $73.6 million.

Cash Requirements and Capital Resources

We believe our cash flows from operations, existing borrowing capacity, debt and equity issuances and future rate increases should be sufficient to satisfy our material cash requirements over the short-term and the long-term. As a rate-regulated utility our customer rates are generally structured to recover expected operating costs, with an opportunity to earn a return on our invested capital. This structure supports recovery for many of our operating expenses, although there are situations where the timing of our cash outlays results in increased working capital requirements. Due to the seasonality of our utility business, our short-term working capital requirements typically peak during the coldest winter months and warmest summer months when we cover the lag between when purchasing energy supplies and when customers pay for these costs. Our credit facilities may also be utilized for funding cash requirements during seasonally active construction periods, with peak activity during warmer months. Our cash requirements also include a variety of contractual obligations as outlined below in the “Contractual Obligations and Other Commitments” section.

Our material cash requirements are also related to investment in our business through our capital expenditure program. Our estimated capital expenditures are discussed in the NorthWestern Energy Group Annual Report on Form 10-K for the year ended December 31, 2023 within the Management’s Discussion and Analysis of Financial Condition and Results of Operations under the "Significant Infrastructure Investments and Initiatives" section. As of September 30, 2024, there have been no material changes in our estimated capital expenditures. The actual amount of capital expenditures is subject to certain factors including the impact that a material change in operations, available financing, supply chain issues, or inflation could impact our current liquidity and ability to fund capital resource requirements. Events such as these could cause us to defer a portion of our planned capital expenditures, as necessary. To fund our strategic growth opportunities, we evaluate the additional capital need in balance with debt capacity and equity issuances that would be intended to allow us to maintain investment grade ratings.

Credit Facilities
46



Liquidity is generally provided by internal operating cash flows and the use of our unsecured revolving credit facilities. We utilize availability under our revolving credit facilities to manage our cash flows due to the seasonality of our business and to fund capital investment. Cash on hand in excess of current operating requirements is generally used to invest in our business and reduce borrowings.

For further information on our credit facilities, see Note 10 - Unsecured Credit Facilities in the NorthWestern Energy Group Annual Report on Form 10-K for the year ended December 31, 2023.

As of September 30, 2024 and 2023 the outstanding balances of our credit facilities were $286.0 million and $177.0 million, respectively. As of October 25, 2024, the availability under our credit facilities was approximately $335.0 million, and there were no letters of credit outstanding.

Long-term Debt and Equity

We generally issue long-term debt to refinance other long-term debt maturities and borrowings under our revolving credit facilities, as well as to fund long-term capital investments and strategic opportunities.

For further information on our recent long-term debt activity, see Note 5 - Financing Activities to the Condensed Consolidated Financial Statements included herein.

We generally issue equity securities to fund long-term investment in our business. We evaluate our equity issuance needs to support our plan to maintain a 50 - 55 percent debt to total capital ratio excluding finance leases.

Credit Ratings

In general, less favorable credit ratings make debt financing more costly and more difficult to obtain on terms that are favorable to us and our customers, may impact our trade credit availability, and could result in the need to issue additional equity securities. Fitch Ratings (Fitch), Moody’s Investors Service (Moody’s), and S&P Global Ratings (S&P) are independent credit-rating agencies that rate our debt securities. These ratings indicate the agencies’ assessment of our ability to pay interest and principal when due on our debt. As of October 25, 2024, our current ratings with these agencies are as follows:
Issuer Rating Senior Secured Rating Senior Unsecured Rating Outlook
NorthWestern Energy Group
  Fitch(1)(2)
BBB - BBB Stable
Moody’s - - - -
  S&P(2)
BBB - - Stable
NW Corp
  Fitch(1)(2)
BBB A- BBB+ Stable
  Moody’s(2)
Baa2 A3 Baa2 Stable
  S&P(2)
BBB A- - Stable
NWE Public Service
  Fitch(1)(2)
BBB A- BBB+ Stable
  Moody’s(2)
Baa2 A3 - Stable
  S&P(2)
BBB A- - Stable
(1) This Fitch Issuer Rating represents the Issuer Default Rating.
(2) As part of completing the holding company reorganization, NorthWestern Energy Group and NWE Public Service received their credit ratings from these agencies in December 2023. These agencies also affirmed their ratings for NW Corp.

A security rating is not a recommendation to buy, sell or hold securities. Such rating may be subject to revision or withdrawal at any time by the credit rating agency and each rating should be evaluated independently of any other rating.

Contractual Obligations and Other Commitments

47


We have a variety of contractual obligations and other commitments that require payment of cash at certain specified periods. The following table summarizes our contractual cash obligations and commitments as of September 30, 2024.
  Total 2024 2025 2026 2027 2028 Thereafter
  (in thousands)
Long-term debt(1)
$ 2,880,660  $ —  $ 300,000  $ 105,000  $ —  $ 465,660  $ 2,010,000 
Finance leases 6,327  866  3,596  1,865  —  —  — 
Short-term borrowings 100,000  —  100,000  —  —  —  — 
Estimated pension and other postretirement obligations(2)
47,785  2,937  11,437  11,137  11,137  11,137  N/A
Qualifying facilities liability(3)
247,480  18,528  60,360  55,393  56,665  42,400  14,134 
Supply and capacity contracts(4)
3,279,236  92,481  331,100  294,228  275,410  257,802  2,028,215 
Contractual interest payments on debt(5)
1,578,806  35,493  125,836  116,651  114,992  112,135  1,073,699 
Commitments for significant capital projects(6)
34,800  26,817  7,983  —  —  —  — 
Total Commitments(7)
$ 8,175,094  $ 177,122  $ 940,312  $ 584,274  $ 458,204  $ 889,134  $ 5,126,048 
_________________________
(1)Represents cash payments for long-term debt and excludes $12.8 million of debt discounts and debt issuance costs, net.
(2)We estimate cash obligations related to our pension and other postretirement benefit programs for five years, as it is not practicable to estimate thereafter. Pension and postretirement benefit estimates reflect our expected cash contributions, which may be in excess of minimum funding requirements.
(3)Certain QFs require us to purchase minimum amounts of energy at prices ranging from $118 to $130 per MWH through 2029. Our estimated gross contractual obligation related to these QFs is approximately $247.5 million. A portion of the costs incurred to purchase this energy is recoverable through rates authorized by the MPSC, totaling approximately $221.0 million.
(4)We have entered into various purchase commitments, largely purchased power, electric transmission, coal and natural gas supply and natural gas transportation contracts. These commitments range from one to 26 years. The energy supply costs incurred under these contracts are generally recoverable through rate mechanisms approved by the MPSC.
(5)Contractual interest payments include our revolving credit facilities, which have a variable interest rate. We have assumed an average interest rate of 6.19 percent on the outstanding balance through maturity of the facilities.
(6)Represents significant firm purchase commitments for construction of planned capital projects.
(7)The table above excludes potential tax payments related to uncertain tax positions as they are not practicable to estimate. Additionally, the table above excludes reserves for environmental remediation (See Note 10 - Commitments and Contingencies) and asset retirement obligations as the amount and timing of cash payments may be uncertain.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES
 
Our discussion and analysis of financial condition and results of operations is based on our Financial Statements, which have been prepared in accordance with GAAP. The preparation of these Financial Statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. We base our estimates on historical experience and other assumptions that are believed to be proper and reasonable under the circumstances.

We continually evaluate the appropriateness of our estimates and assumptions. Actual results could differ from those estimates. We consider an estimate to be critical if it is material to the Financial Statements and it requires assumptions to be made that were uncertain at the time the estimate was made and changes in the estimate are reasonably likely to occur from period to period. This includes the accounting for the following: regulatory assets and liabilities, pension and postretirement benefit plans and income taxes. These policies were disclosed in Management’s Discussion and Analysis of Financial Condition and Results of Operations in the NorthWestern Energy Group Annual Report on Form 10-K for the year ended December 31, 2023. As of September 30, 2024, there have been no material changes in these policies.




48


ITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
 
We are exposed to market risks, including, but not limited to, interest rates, energy commodity price volatility, and counterparty credit exposure. We have established comprehensive risk management policies and procedures to manage these market risks. There have been no material changes in our market risks as disclosed in the NorthWestern Energy Group Annual Report on Form 10-K for the year ended December 31, 2023.
 

49


ITEM 4.CONTROLS AND PROCEDURES
 
Evaluation of Disclosure Controls and Procedures

We have established disclosure controls and procedures designed to ensure that information required to be disclosed in the reports we file or submit under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms, and accumulated and reported to management, including the principal executive officer and principal financial officer to allow timely decisions regarding required disclosure.

We conducted an evaluation, under the supervision and with the participation of our principal executive officer and principal financial officer, of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934). Based on this evaluation, our principal executive officer and principal financial officer have concluded that, as of the end of the period covered by this report, our disclosure controls and procedures were effective.

Changes in Internal Control Over Financial Reporting

There have been no changes in our internal control over financial reporting during the most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.




50





PART II. OTHER INFORMATION
 
ITEM 1.LEGAL PROCEEDINGS
 
See Note 10 - Commitments and Contingencies, to the Financial Statements for information regarding legal proceedings.
 
ITEM 1A.  RISK FACTORS

Refer to the NorthWestern Energy Group Annual Report on the Form 10-K for the year ended December 31, 2023 for disclosure of the risk factors that could have a significant impact on our business, financial condition, results of operations or cash flows and could cause actual results or outcomes to differ materially from those discussed in our reports filed with the SEC (including this Quarterly Report on Form 10-Q), and elsewhere. These risk factors have not changed materially since such disclosure.

ITEM 5.  OTHER INFORMATION

Rule 10b5-1 Plans

During the three months ended September 30, 2024, no director or officer of the Company adopted or terminated a "Rule 10b5-1 trading agreement" or "non-Rule 10b5-1 trading agreement," as each term is defined in Item 408(a) of Regulation S-K.

51


ITEM 6.                      EXHIBITS -
 
(a) Exhibits

Exhibit 2.1 — Colstrip Units 3&4 Interests Abandonment and Acquisition Agreement, dated as of July 30, 2024 by and between Northwestern Corporation and Puget Sound Energy Inc. (incorporated by reference to Exhibit 2.1 of NorthWestern Energy Group, Inc.'s Current Report on Form 8-K, dated July 30, 2024 Commission File No. 000-56598).

Exhibit 31.1 — Certification of chief executive officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 - NorthWestern Energy Group, Inc. 

Exhibit 31.2 — Certification of chief financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 - NorthWestern Energy Group, Inc.

Exhibit 32.1 — Certification of chief executive officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 - NorthWestern Energy Group, Inc.
 
Exhibit 32.2 — Certification of chief financial officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 - NorthWestern Energy Group, Inc.
 
Exhibit 101.INS—Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
 
Exhibit 101.SCH—Inline XBRL Taxonomy Extension Schema Document
 
Exhibit 101.CAL—Inline XBRL Taxonomy Extension Calculation Linkbase Document
 
Exhibit 101.DEF—Inline XBRL Taxonomy Extension Definition Linkbase Document
 
Exhibit 101.LAB—Inline XBRL Taxonomy Label Linkbase Document
 
Exhibit 101.PRE—Inline XBRL Taxonomy Extension Presentation Linkbase Document

Exhibit 104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)
52



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.
    NorthWestern Energy Group, Inc.
Date: October 29, 2024 By: /s/ CRYSTAL LAIL
    Crystal Lail
    Vice President and Chief Financial Officer
    Duly Authorized Officer and Principal Financial Officer
53
EX-31.1 2 ex311certificationq32024.htm EX-31.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER Document

EXHIBIT 31.1
CERTIFICATION
I, Brian B. Bird, certify that:
1.I have reviewed this report on Form 10-Q of NorthWestern Energy Group, Inc.;
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(s) 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(s) 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.
October 29, 2024
/s/ BRIAN B. BIRD
Brian B. Bird
President and Chief Executive Officer







EX-31.2 3 ex312certificationq32024.htm EX-31.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER Document

EXHIBIT 31.2
CERTIFICATION

I, Crystal Lail, certify that:
1.I have reviewed this report on Form 10-Q of NorthWestern Energy Group, Inc.;
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(s) 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(s) 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.
October 29, 2024
/s/ CRYSTAL LAIL
Crystal Lail
Vice President and Chief Financial Officer




EX-32.1 4 ex321certificationq32024.htm EX-32.1 CERT BRIAN B. BIRD PURSUANT TO SECTION 906 Document


EXHIBIT 32.1
CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of NorthWestern Energy Group, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Brian B. Bird, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:
1)The Report fully complies with the requirements of Sections 13(a) or 15(d) of the Securities Exchange Act of 1934; and
2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
October 29, 2024 /s/ BRIAN B. BIRD
Brian B. Bird
President and Chief Executive Officer


EX-32.2 5 ex322certificationq32024.htm EX-32.2 CERT OF CRYSTAL LAIL PURSUANT TO SECTION 906 NWE GROUP INC. Document


Exhibit 32.2
CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of NorthWestern Energy Group, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Crystal Lail, Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:
1)The Report fully complies with the requirements of Sections 13(a) or 15(d) of the Securities Exchange Act of 1934; and
2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
October 29, 2024 /s/ CRYSTAL LAIL
Crystal Lail
Vice President and Chief Financial Officer