Diamond Hill (NASDAQ: DHIL) reports $25.9B assets under management mix

Rhea-AI Filing Summary

Diamond Hill Investment Group, Inc. filed an update on assets under management for its subsidiary Diamond Hill Capital Management as of March 31, 2026. Total assets under management were $25,911 million, showing the overall scale of client capital the firm oversees.

By investment vehicle, Proprietary Funds held $16,668 million, separately managed accounts held $4,169 million, collective investment trusts held $1,430 million, and other pooled vehicles held $3,644 million. This highlights that most assets sit in proprietary fund structures.

By investment strategy, the largest allocations were Large Cap at $10,745 million, Short Duration Securitized Bond at $5,340 million, Core Fixed Income at $3,826 million, and Long-Short at $2,187 million, with smaller amounts in Small Cap, Mid Cap, Select, International, Micro Cap, and other securitized strategies.

8-K Event Classification

Item 8.01 — Other Events

1 item

Item 8.01 Other Events Other

Voluntary disclosure of events the company deems important to shareholders but not covered by other items.

Key Figures

Total assets under management: $25,911 million Proprietary Funds AUM: $16,668 million Separately managed accounts AUM: $4,169 million +5 more

8 metrics

Total assets under management $25,911 million As of March 31, 2026

Proprietary Funds AUM $16,668 million By investment vehicle

Separately managed accounts AUM $4,169 million By investment vehicle

Other pooled vehicles AUM $3,644 million By investment vehicle

Large Cap strategy AUM $10,745 million By investment strategy

Short Duration Securitized Bond AUM $5,340 million By investment strategy

Core Fixed Income AUM $3,826 million By investment strategy

Long-Short strategy AUM $2,187 million By investment strategy

Key Terms

assets under management, separately managed accounts, collective investment trusts, other pooled vehicles, +1 more

5 terms

assets under management financial

"The following is a summary of assets under management as of March 31, 2026"

Assets under management (AUM) is the total value of all the investments that a financial company or fund is responsible for overseeing on behalf of its clients. It’s like a big bucket that shows how much money the firm is managing for people or organizations. A higher AUM often indicates a larger, more trusted company, and it can influence how much money they earn and the services they can offer.

separately managed accounts financial

"Separately managed accounts | | 4,169"

A separately managed account is an investment portfolio owned by a single investor but professionally managed to that investor’s specific goals and preferences, rather than pooled with other clients’ money. It matters to investors because it offers greater customization, tax control and transparency—like hiring a personal chef instead of eating from a shared buffet—though it often requires higher minimums and can have different fee and liquidity implications.

collective investment trusts financial

"Collective investment trusts | | 1,430"

Collective investment trusts are pooled investment funds run by banks or trust companies for workplace retirement plans and other qualified accounts; think of them like a shared shopping cart where many investors combine money to buy a mix of stocks or bonds. They matter to investors because they often charge lower fees and are designed for long-term retirement use, which can improve net returns and affect the cost, liquidity and transparency of retirement savings.

other pooled vehicles financial

"Other pooled vehicles | | 3,644"

Short Duration Securitized Bond financial

"Short Duration Securitized Bond | | 5,340"

Understanding 8-K Material Events →

0000909108false00009091082026-04-022026-04-02

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): 4/2/2026

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 March 31. 2026 of Diamond Hill Capital Management, Inc., a wholly owned subsidiary of Diamond Hill Investment Group, Inc. (in millions):

By Investment Vehicle
Proprietary Funds	$	16,668
Separately managed accounts		4,169
Collective investment trusts		1,430
Other pooled vehicles		3,644
Total		25,911
By Investment Strategy
Small Cap	$	275
Small-Mid Cap		1,300
Mid Cap		883
Large Cap		10,745
Large Cap Concentrated		178
Select		769
Long-Short		2,187
International		170
Micro Cap		40
Short Duration Securitized Bond		5,340
Securitized Credit		140
Securitized Total Return		32
Core Fixed Income		3,826
Long Duration Treasury		26
Total	$	25,911

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:	4/2/2026	By:		/s/ Thomas E. Line
				Thomas E. Line, Chief Financial Officer and Treasurer

FAQ

What total assets under management did DHIL report as of March 31, 2026?

Diamond Hill reported total assets under management of $25,911 million as of March 31, 2026. This figure reflects all client assets overseen across proprietary funds, separately managed accounts, collective investment trusts, and other pooled vehicles within Diamond Hill Capital Management.

How are Diamond Hill’s assets under management split by investment vehicle?

Diamond Hill’s assets under management are led by Proprietary Funds at $16,668 million, followed by separately managed accounts at $4,169 million, collective investment trusts at $1,430 million, and other pooled vehicles at $3,644 million, totaling $25,911 million.

Which investment strategies hold the most AUM at Diamond Hill (DHIL)?

The largest strategies by AUM are Large Cap at $10,745 million, Short Duration Securitized Bond at $5,340 million, Core Fixed Income at $3,826 million, and Long-Short at $2,187 million, indicating a focus on large-cap equity and fixed income strategies.

What equity strategies and amounts did Diamond Hill list in this 8-K?

Equity strategies and assets under management included Small Cap $275 million, Small-Mid Cap $1,300 million, Mid Cap $883 million, Large Cap $10,745 million, Large Cap Concentrated $178 million, Select $769 million, Long-Short $2,187 million, and Micro Cap $40 million.

What fixed income and securitized strategies did DHIL report AUM for?

Fixed income and securitized strategies included Short Duration Securitized Bond at $5,340 million, Securitized Credit at $140 million, Securitized Total Return at $32 million, Core Fixed Income at $3,826 million, and Long Duration Treasury at $26 million.

What international exposure did Diamond Hill report in its AUM breakdown?

Diamond Hill listed an International strategy with assets under management of $170 million as of March 31, 2026. This amount forms part of the overall $25,911 million total across the firm’s range of equity, fixed income, and securitized strategies.

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