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United States
Securities and Exchange Commission
Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 4, 2025

DH_Logo_No Tagline_Black.jpg

DIAMOND HILL INVESTMENT GROUP, INC.

(Exact Name of Registrant as Specified in its Charter)
 
Ohio 000-24498   65-0190407
(State or other jurisdiction of
incorporation)
(Commission File Number)   (I.R.S. Employer
Identification No.)
325 John H. McConnell Blvd, Suite 200, Columbus, Ohio 43215
(Address of principal executive offices) (Zip Code)


Registrant's Telephone Number, Including Area Code: (614) 255-3333

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐  Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐  Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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, no par value DHIL The NASDAQ Stock Market
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
                                        
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. ☐

Item 8.01 Other Events

The following is a summary of assets under management as of July 31, 2025 of Diamond Hill Capital Management, Inc., a wholly owned subsidiary of Diamond Hill Investment Group, Inc. (in millions):

By Investment Vehicle
Diamond Hill Funds $ 19,403 
Separately managed accounts 5,537 
Collective investment trusts 1,443 
Other pooled vehicles 3,803 
Total $ 30,186 
By Investment Strategy
Small Cap $ 236 
Small-Mid Cap 1,447 
Mid Cap 1,001 
Large Cap 16,471 
Large Cap Concentrated 164 
Select 774 
Long-Short 1,945 
International 153 
Micro Cap 40 
Short Duration Securitized Bond 4,497 
Securitized Credit 107 
Securitized Total Return 27 
Core Fixed Income 3,299 
Long Duration Treasury 25 
Total $ 30,186 


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 hereunto duly authorized.

DIAMOND HILL INVESTMENT GROUP, INC.
Date: August 4, 2025 By: /s/ Thomas E. Line
Thomas E. Line, Chief Financial Officer and Treasurer