Nonprofit · EIN 74-6367261
LOUIS & MARY STUMBERG FOUNDATION
Tax-exempt · SAN ANTONIO, TX 78212
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $3,025,050 | $1,005,305 | $2,019,745 | $15,713,458 | $0 | $15,713,458 |
| December 31, 2024 | 990-PF | $4,152,587 | $919,303 | $3,233,284 | $13,692,145 | $0 | $13,692,145 |
| December 31, 2023 | 990-PF | $1,102,801 | $705,405 | $397,396 | $10,458,861 | $0 | $10,458,861 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $1,128,156
- Dividends
- $469,973
- Net gain from sales of assets
- $1,425,328
- Other income
- $1,593
Expenses
- Grants and similar amounts paid
- $847,500
- Compensation of officers, directors and key employees
- $0
- Disbursements for charitable purposes
- $860,237
- Excise tax on investment income
- $24,879
Balance sheet and other
- Total assets, start of year
- $13,692,145
- Total assets, end of year
- $15,713,458
- Total liabilities, end of year
- $0
- Net assets, end of year
- $15,713,458
- Fair market value of assets
- $21,230,596
- Qualifying distributions
- $860,237
- Net investment income
- $1,895,301
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 December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MARY PAT STUMBERG 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
| LOUIS H STUMBERG JR 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
| DIANA M STUMBERG 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
| ERIC B STUMBERG 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
990-PF for the year ended December 31, 2024: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MARY PAT STUMBERG 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
| LOUIS H STUMBERG JR 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
| DIANA M STUMBERG 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
| ERIC B STUMBERG 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
990-PF for the year ended December 31, 2023: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MARY PAT STUMBERG 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
| LOUIS H STUMBERG JR 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
| DIANA M STUMBERG 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
| ERIC B STUMBERG 227 W OLMOS DRIVE, SAN ANTONIO, TX 78212 | TRUSTEE | 1 | $0 |
Address and contacts
- Address (IRS master file)
- 227 W OLMOS DR, SAN ANTONIO, TX 78212-1957
- In care of
- % DIANA M STUMBERG
- Signed the 990-PF
- L HERBERT STUMBERG, TRUSTEE
- Phone
- (210) 271-0448
- Return prepared by
- ERNST & YOUNG US 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 December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990-PF on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-PF on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-PF on file |
IRS record
- EIN
- 74-6367261
- 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
- 1989
- Accounting year ends
- December
- Files
- Form 990-PF
- Assets (IRS master file)
- $15,713,458
- Income (IRS master file)
- $4,914,358
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | $3,025,050 | $1,005,305 | $15,713,458 | IRS |
| 990-PF | December 2024 | $4,152,587 | $919,303 | $13,692,145 | IRS |
| 990-PF | December 2023 | $1,102,801 | $705,405 | $10,458,861 | XML |
| 990-PF | December 2022 | – | – | – | IRS |
| 990-PF | December 2021 | – | – | – | IRS |
| 990-PF | December 2020 | – | – | – | IRS |
| 990-PF | December 2018 | – | – | – | 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 74-6367261).
Questions about LOUIS & MARY STUMBERG FOUNDATION
- What is the EIN of LOUIS & MARY STUMBERG FOUNDATION?
- The employer identification number (EIN) of LOUIS & MARY STUMBERG FOUNDATION is 74-6367261.
- Is LOUIS & MARY STUMBERG FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1989.
- Are donations to LOUIS & MARY STUMBERG FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does LOUIS & MARY STUMBERG FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of LOUIS & MARY STUMBERG FOUNDATION due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did LOUIS & MARY STUMBERG FOUNDATION last file with the IRS?
- The latest return in the IRS public files is the 990-PF for the year ended December 2025.
- Who are the officers and directors of LOUIS & MARY STUMBERG FOUNDATION?
- The 990-PF for the year ended December 31, 2025 lists 4 people; 0 received compensation from the organization.
- How much revenue does LOUIS & MARY STUMBERG FOUNDATION have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $3,025,050, expenses of $1,005,305 and total assets of $15,713,458 at year end.
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