Diamond Hill Capital Management, Llc
- Regulatory AUM
- $29.4B
- Discretionary
- $29.4B
- Clients
- 3,192
- Avg AUM / client
- $9.2M
- Accounts
- 3,192
- Employees
- 120
AUM over time
Annual snapshots from Form ADV filings · as of May 22, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Individuals (non-high net worth) | 5 | $0 | — |
| High net worth individuals | 11 | $5.8M | 0.02% |
| Investment companies | 21 | $21.8B | 74.3% |
| Pooled investment vehicles (non-investment companies) | 10 | $2.6B | 8.88% |
| Pension and profit sharing plans | 15 | $994M | 3.38% |
| Charitable organizations | 29 | $336M | 1.14% |
| State or municipal government entities | 3 | $571M | 1.94% |
| Other investment advisers | 3,083 | $2.4B | 8.08% |
| Insurance companies | 1 | $133M | 0.45% |
| Corporations and other businesses | 14 | $530M | 1.81% |
Private funds (1)
Reported in Form ADV Section 7.B.(1), filing of Nov 2024 · $20.8M combined gross assets
| Fund | Type | Domicile | Gross assets | Owners |
|---|---|---|---|---|
| Diamond Hill Micro Cap Fund, Lp | Hedge Fund | Delaware | $20.8M | 13 |
Nonprofit clients
Charities that reported this firm as a top-paid contractor (investment services) on Form 990.
| Charity | Location | Period |
|---|---|---|
| Akron Community Foundation EIN 341087615 | Akron, OH | 03/31/2025 |
Retirement plan clients
Plans that reported this firm as an investment service provider on Form 5500 Schedule C.
| Plan | Location | Plan year |
|---|---|---|
| Retirement Plan For Hourly And Salaried Employees Of Donsco, Inc. Donsco, Inc. | 2024 | |
| Retirement Plan Of Norfolk Southern Corporation And Participating Subsidiary Companies Norfolk Southern Corporation | 2024 | |
| The Goldman Sachs 401(k) Plan The Goldman Sachs Group, Inc. | 2024 | |
| I.B.E.W. Local 456 Pension Plan Ibew Joint Pension Fund Local 456 | 2024 | |
| John Muir Health Retirement Plan John Muir Health | 2024 | |
| Oshkosh Corporation Hourly Employees' Retirement Plan Oshkosh Corporation | 2024 | |
| Northwell Health Pension Plan Northwell Health, Inc. | 2024 | |
| Highmark Retirement Plan Highmark Health | 2024 |
People (7)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Line, Thomas, Edward | Chief Financial Officer And Treasurer | Jan 2015 (12y) | Less than 5% | |
| Brilliant, Heather | Chief Executive Officer | Sep 2019 (7y) | Less than 5% | |
| Jo Ann Quinif | President And Chief Client Officer | Oct 2019 (7y) | Less than 5% | |
| Bentz, Alyssa, Ann | Chief Compliance Officer | May 2024 (2y) | Less than 5% | |
| Patrick Daniel Trencansky | Registered representative | Nov 2019 (7y) | ||
| Mark A. Theado | Registered representative | Apr 2022 (4y) | ||
| Christopher Stephen Mccarry | Registered representative | Feb 2025 (1y) |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| Diamond Hill Investment Group, Inc. | Parent Company | Jan 1993 | A | 75% or more |
Undisclosed: 0% – 25% of the firm is not attributable from the filed Schedule A bands.
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Private funds (1, $20.8M gross assets)
| Fund | Type | Gross assets | Min. investment | Owners |
|---|---|---|---|---|
| Diamond Hill Micro Cap Fund, Lp | Hedge Fund | $20.8M | $1.0M | 13 |
From Form ADV Section 7.B private fund reporting.
Retirement plans served (8)
| Plan | Sponsor | Participants | Plan assets | As of |
|---|---|---|---|---|
| Retirement Plan For Hourly And Salaried Employees Of Donsco, Inc. | Donsco, Inc. | 98 | $11.7M | 07/01/2024 |
| Retirement Plan Of Norfolk Southern Corporation And Participating Subsidiary Companies | Norfolk Southern Corporation | 4,771 | $2.5B | 01/01/2024 |
| The Goldman Sachs 401(k) Plan | The Goldman Sachs Group, Inc. | 23,891 | $12.8B | 01/01/2024 |
| I.B.E.W. Local 456 Pension Plan | Ibew Joint Pension Fund Local 456 | 712 | $302M | 01/01/2024 |
| John Muir Health Retirement Plan | John Muir Health | 5,166 | $630M | 01/01/2024 |
| Oshkosh Corporation Hourly Employees' Retirement Plan | Oshkosh Corporation | 885 | $166M | 01/01/2024 |
| Northwell Health Pension Plan | Northwell Health, Inc. | 26,078 | $2.8B | 01/01/2024 |
| Highmark Retirement Plan | Highmark Health | 12,825 | $3.1B | 01/01/2024 |
From Form 5500 service-provider disclosures.
Foundations & charities (1)
| Organization | Type | Assets | As of |
|---|---|---|---|
| Akron Community Foundation | Public charity | $305M | 03/31/2025 |
From IRS Form 990 investment-management-fee disclosures.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 05/22/2026 | 1.22 MB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
- • Performance-based fees
Services
- • Portfolio management for individuals/small businesses
- • Portfolio management for investment companies
- • Portfolio management for pooled investment vehicles
- • Portfolio management for businesses/institutional clients
Custody
Reported custodians
- Goldman Sachs $1.3B (4% of AUM) May 2026
- State Street $931M (3% of AUM) May 2026
- J.P. Morgan $909M (3% of AUM) May 2026
- Northern Trust $863M (3% of AUM) May 2026
- BNY Mellon $858M (3% of AUM) Jul 2021
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports having custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: May 22, 2026.
View current Form ADV (SEC/IAPD) ↗