Nonprofit · EIN 33-0929538
NIERENBERG FOUNDATION
Tax-exempt · LA JOLLA, CA 92037
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $94,355 | $89,319 | $5,036 | $1,725,025 | $0 | $1,725,025 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Dividends
- $77,844
- Net gain from sales of assets
- -$2,072
- Other income
- $18,583
Expenses
- Grants and similar amounts paid
- $77,015
- Compensation of officers, directors and key employees
- $0
- Disbursements for charitable purposes
- $77,015
- Excise tax on investment income
- $1,259
Balance sheet and other
- Total assets, start of year
- $1,719,989
- Total assets, end of year
- $1,725,025
- Total liabilities, end of year
- $0
- Net assets, end of year
- $1,725,025
- Fair market value of assets
- $1,585,691
- Qualifying distributions
- $77,015
- Net investment income
- $96,427
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 |
|---|---|---|---|
| NICOLAS NIERENBERG 9494 LA JOLLA FARMS ROAD, LA JOLLA, CA 92037 | PRESIDENT, DIRECTOR | 1 | $0 |
| CAROLINE NIERENBERG 9494 LA JOLLA FARMS ROAD, LA JOLLA, CA 92037 | VP, SEC, TREAS, DIRECTOR | 1 | $0 |
Address and contacts
- Address (IRS master file)
- 9494 LA JOLLA FARMS RD, LA JOLLA, CA 92037-1127
- In care of
- % NICO NIERENBERG
- Signed the 990-PF
- NICOLAS NIERENBERG, DIRECTOR
- Phone
- (650) 845-8100
- Return prepared by
- DUFFY KRUSPODIN 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
- 33-0929538
- 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
- 2001
- Accounting year ends
- December
- Files
- Form 990-PF
- Category (NTEE)
- Philanthropy, voluntarism and grantmaking foundations (T22)
- Assets (IRS master file)
- $1,725,025
- Income (IRS master file)
- $317,358
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | – | – | – | IRS |
| 990-PF | December 2024 | – | – | – | IRS |
| 990-PF | December 2023 | $133,690 | $100,299 | $1,629,076 | IRS |
| 990-PF | December 2022 | – | – | – | IRS |
| 990-PF | December 2021 | – | – | – | IRS |
| 990-PF | December 2020 | – | – | – | IRS |
| 990-PF | December 2018 | – | – | – | IRS |
990-N: the IRS publishes only the latest e-Postcard per organization; earlier years appear here as 990.tax collects the monthly files. 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.
Questions about NIERENBERG FOUNDATION
- What is the EIN of NIERENBERG FOUNDATION?
- The employer identification number (EIN) of NIERENBERG FOUNDATION is 33-0929538.
- Is NIERENBERG FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2001.
- Are donations to NIERENBERG FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does NIERENBERG FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of NIERENBERG 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 NIERENBERG 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 NIERENBERG FOUNDATION?
- The 990-PF for the year ended December 31, 2025 lists 2 people; 0 received compensation from the organization.
- How much revenue does NIERENBERG FOUNDATION have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $94,355, expenses of $89,319 and total assets of $1,725,025 at year end.
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