Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Thomas L'Quentus 2. Issuer Name and Ticker or Trading Symbol DIAMOND HILL INVESTMENT GROUP INC [DHIL] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 325 JOHN H MCCONNELL BLVD, SUITE 200 3. Date of Earliest Transaction (Month/Day/Year) 12/08/2023 (Street) COLUMBUS, OH 43215 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Shares 06/14/2024 P(1) 6.731 A $149.44 2,540.731 D Common Shares 09/13/2024 P(2) 13.827 A $152.34 2,554.558 D Common Shares 12/06/2024 P(3) 10.615 A $165.07 2,565.173 D Common Shares 03/21/2025 P(3) 12.069 A $146.5 2,577.242 D Common Shares 06/13/2025 P(4) 12.191 A $146.51 2,589.433 D Common Shares 09/12/2025 P(4) 12.618 A $143 2,602.051 D Common Shares 03/22/2024 P(5) 6.558 A $151.87 2,608.609 D Common Shares 12/08/2023 P(5) 5.925 A $166.59 2,614.534 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Thomas L'Quentus 325 JOHN H MCCONNELL BLVD SUITE 200 COLUMBUS, OH 43215	X

Signatures

Carlotta D. King by POA		03/10/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Inadvertent purchase of the issuer's common shares through a broker-administered dividend reinvestment plan. The reporting person sold 250 common shares at $161.64 per share on September 23, 2024, which was reported on Form 4 filed on September 24, 2024 (the "2024 Sale"). This purchase and the 2024 Sale were matchable under Section 16(b) of the Securities Exchange Act of 1934, and resulted in a short swing profit of $82.12, which was disgorged in full to the issuer by the reporting person.
(2)	Inadvertent purchase of the issuer's common shares through a broker-administered dividend reinvestment plan. This purchase and the 2024 Sale were matchable under Section 16(b) of the Securities Exchange Act of 1934, and resulted in a short swing profit of $128.59, which was disgorged in full to the issuer by the reporting person.
(3)	Inadvertent purchase of the issuer's common shares through a broker-administered dividend reinvestment plan. Although this purchase was matchable against the 2024 Sale under Section 16(b) of the Securities Exchange Act of 1934, no profit was realized by the reporting person.
(4)	Inadvertent purchase of the issuer's common shares through a broker-administered dividend reinvestment plan. The reporting person sold 250 common shares at $141.10 per share on September 23, 2025, which was reported on Form 4 filed on September 25, 2025 (the "2025 Sale"). Although this purchase was matchable against the 2024 Sale under Section 16(b) of the Securities Exchange Act of 1934, no profit was realized by the reporting person.
(5)	Inadvertent purchase of the issuer's common shares through a broker-administered dividend reinvestment plan.
Remarks: The Amount of Securities Beneficially Owned Following the Reported Transaction (Table I, Column 5) in Mr. Thomas' most recent Form 4 (filed on September 25, 2025) was 2,534 common shares. When reporting delinquent transactions, the tally should be based on (i.e., should reflect adjustments to) the number of shares reported as beneficially owned in the insider's last filed report, and should not attempt to show the number of shares owned as of the date of each transaction being reported late (if different).

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