Nonprofit · EIN 46-1256191
HAROLD HAMM FOUNDATION
Tax-exempt · OKLAHOMA CITY, OK 73101
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| March 31, 2026 | 990-PF | $159,347 | $1,705,601 | -$1,546,254 | $8,142,566 | $0 | $8,142,566 |
| March 31, 2025 | 990-PF | $160,081 | $4,548,947 | -$4,388,866 | $8,950,006 | $0 | $8,950,006 |
| March 31, 2024 | 990-PF (amended) | $162,896 | $2,635,638 | -$2,472,742 | $11,084,019 | $0 | $11,084,019 |
Financial details: 990-PF for the year ended March 31, 2026
Revenue
- Contributions, gifts and grants
- $2,000
- Dividends
- $157,291
- Interest
- $56
Expenses
- Grants and similar amounts paid
- $1,696,425
- Compensation of officers, directors and key employees
- $0
- Disbursements for charitable purposes
- $1,697,920
- Excise tax on investment income
- $2,169
Balance sheet and other
- Total assets, start of year
- $8,950,006
- Total assets, end of year
- $8,142,566
- Total liabilities, end of year
- $0
- Net assets, end of year
- $8,142,566
- Fair market value of assets
- $15,869,426
- Qualifying distributions
- $1,697,920
- Net investment income
- $157,347
From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.
Officers, directors and key employees
As listed on the 990-PF for the year ended March 31, 2026, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| HAROLD G HAMM 20 N BROADWAY 1410, OKLAHOMA CITY, OK 73102 | PRESIDENT | 2 | $0 |
| SHELLY LAMBERTZ 20 N BROADWAY 1410, OKLAHOMA CITY, OK 73102 | SECRETARY | 2 | $0 |
990-PF for the year ended March 31, 2025: 2 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| HAROLD G HAMM 20 N BROADWAY 1410, OKLAHOMA CITY, OK 73102 | PRESIDENT | 2 | $0 |
| SHELLY LAMBERTZ 20 N BROADWAY 1410, OKLAHOMA CITY, OK 73102 | SECRETARY | 2 | $0 |
990-PF for the year ended March 31, 2024: 2 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| HAROLD G HAMM 20 N BROADWAY 1410, OKLAHOMA CITY, OK 73102 | PRESIDENT | 2 | $0 |
| SHELLY LAMBERTZ 20 N BROADWAY 1410, OKLAHOMA CITY, OK 73102 | SECRETARY | 2 | $0 |
Address and contacts
- Address (IRS master file)
- PO BOX 1295, OKLAHOMA CITY, OK 73101-1295
- In care of
- % HAMM CAPITAL LLC
- Signed the 990-PF
- HAROLD G HAMM, PRESIDENT
- Phone
- (405) 605-7788
- Return prepared by
- HOGANTAYLOR LLP
What it must file and when
IRS records say it files Form 990-PF. Private foundations file every year. Its accounting year ends in March, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | March 31, 2026 | August 17, 2026 | 990-PF on file |
| 2024 | March 31, 2025 | August 15, 2025 | 990-PF on file |
| 2023 | March 31, 2024 | August 15, 2024 | 990-PF on file |
IRS record
- EIN
- 46-1256191
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Private non-operating foundation
- Donations deductible (Pub 78)
- Private foundation, 30% limit
- Exempt since
- 2013
- Accounting year ends
- March
- Files
- Form 990-PF
- Category (NTEE)
- Philanthropy, voluntarism and grantmaking foundations (T21)
- Assets (IRS master file)
- $8,142,566
- Income (IRS master file)
- $159,347
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | March 2026 | $159,347 | $1,705,601 | $8,142,566 | XML |
| 990-PF | March 2025 | $160,081 | $4,548,947 | $8,950,006 | XML |
| 990-PF | March 2024 | $162,896 | $2,635,638 | $11,084,019 | XML |
| 990-PF | March 2023 | – | – | – | IRS |
| 990-PF | March 2022 | – | – | – | IRS |
| 990-PF | March 2021 | – | – | – | IRS |
990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 46-1256191).
Questions about HAROLD HAMM FOUNDATION
- What is the EIN of HAROLD HAMM FOUNDATION?
- The employer identification number (EIN) of HAROLD HAMM FOUNDATION is 46-1256191.
- Is HAROLD HAMM FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2013.
- Are donations to HAROLD HAMM FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does HAROLD HAMM FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of HAROLD HAMM FOUNDATION due?
- The return for tax year 2026 (the year ending March 31, 2027) is due August 16, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did HAROLD HAMM FOUNDATION last file with the IRS?
- The latest return in the IRS public files is the 990-PF for the year ended March 2026.
- Who are the officers and directors of HAROLD HAMM FOUNDATION?
- The 990-PF for the year ended March 31, 2026 lists 2 people; 0 received compensation from the organization.
- How much revenue does HAROLD HAMM FOUNDATION have?
- On its 990-PF for the year ended March 31, 2026 it reported revenue of $159,347, expenses of $1,705,601 and total assets of $8,142,566 at year end.
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