Nonprofit · EIN 23-7450437
NATHANIEL A MESNIKOFF FOUNDATION INC
Tax-exempt · WASHINGTON, DC 20002
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $212,039 | $131,057 | $80,982 | $913,446 | $0 | $913,446 |
| December 31, 2024 | 990-PF | $99,884 | $113,110 | -$13,226 | $832,464 | $0 | $832,464 |
| December 31, 2023 | 990-PF | $180,356 | $119,052 | $61,304 | $845,690 | $0 | $845,690 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Dividends
- $25,055
- Net gain from sales of assets
- $186,984
Expenses
- Grants and similar amounts paid
- $125,000
- Compensation of officers, directors and key employees
- $0
- Disbursements for charitable purposes
- $125,000
- Excise tax on investment income
- $2,869
Balance sheet and other
- Total assets, start of year
- $832,464
- Total assets, end of year
- $913,446
- Total liabilities, end of year
- $0
- Net assets, end of year
- $913,446
- Fair market value of assets
- $1,392,158
- Qualifying distributions
- $125,000
- Net investment income
- $212,039
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 |
|---|---|---|---|
| JOEL MESNIKOFF 813 A STREET NE, WASHINGTON, DC 20002 | DIRECTOR | 5 | $0 |
| RACHEL MESNIKOFF GUGGENHEIM 813 A STREET NE, WASHINGTON, DC 20002 | DIRECTOR | 5 | $0 |
| STEVEN GUGGENHEIM 813 A STREET NE, WASHINGTON, DC 20002 | DIRECTOR | 5 | $0 |
| ANN MESNIKOFF CRYSTAL 813 A STREET NE, WASHINGTON, DC 20002 | DIRECTOR | 5 | $0 |
| HOWARD CRYSTAL 813 A STREET NE, WASHINGTON, DC 20002 | DIRECTOR | 5 | $0 |
990-PF for the year ended December 31, 2024: 5 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| JOEL MESNIKOFF 733 THIRD AVENUE, NEW YORK, NY 10017 | DIRECTOR | 5 | $0 |
| RACHEL MESNIKOFF GUGGENHEIM 733 THIRD AVENUE, NEW YORK, NY 10017 | DIRECTOR | 5 | $0 |
| STEVEN GUGGENHEIM 733 THIRD AVENUE, NEW YORK, NY 10017 | DIRECTOR | 5 | $0 |
| ANN MESNIKOFF CRYSTAL 733 THIRD AVENUE, NEW YORK, NY 10017 | DIRECTOR | 5 | $0 |
| HOWARD CRYSTAL 733 THIRD AVENUE, NEW YORK, NY 10017 | DIRECTOR | 5 | $0 |
990-PF for the year ended December 31, 2023: 5 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| JOEL MESNIKOFF 733 THIRD AVENUE, NEW YORK, NY 10017 | DIRECTOR | 5 | $0 |
| RACHEL MESNIKOFF GUGGENHEIM 733 THIRD AVENUE, NEW YORK, NY 10017 | DIRECTOR | 5 | $0 |
| STEVEN GUGGENHEIM 733 THIRD AVENUE, NEW YORK, NY 10017 | DIRECTOR | 5 | $0 |
| ANN MESNIKOFF CRYSTAL 733 THIRD AVENUE, NEW YORK, NY 10017 | DIRECTOR | 5 | $0 |
| HOWARD CRYSTAL 733 THIRD AVENUE, NEW YORK, NY 10017 | DIRECTOR | 5 | $0 |
Address and contacts
- Address (IRS master file)
- 813 A ST NE, WASHINGTON, DC 20002-6033
- In care of
- % ANN R MESNIKOFF-CRYSTAL
- Signed the 990-PF
- ANN MESNIKOFF-CRYSTAL, DIRECTOR
- Phone
- (202) 375-8296
- Return prepared by
- EISNER ADVISORY GROUP LLC
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
- 23-7450437
- 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
- 1975
- Accounting year ends
- December
- Files
- Form 990-PF
- Assets (IRS master file)
- $913,446
- Income (IRS master file)
- $754,568
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | $212,039 | $131,057 | $913,446 | IRS |
| 990-PF | December 2024 | $99,884 | $113,110 | $832,464 | XML |
| 990-PF | December 2023 | $180,356 | $119,052 | $845,690 | 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 23-7450437).
Questions about NATHANIEL A MESNIKOFF FOUNDATION INC
- What is the EIN of NATHANIEL A MESNIKOFF FOUNDATION INC?
- The employer identification number (EIN) of NATHANIEL A MESNIKOFF FOUNDATION INC is 23-7450437.
- Is NATHANIEL A MESNIKOFF FOUNDATION INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1975.
- Are donations to NATHANIEL A MESNIKOFF FOUNDATION INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does NATHANIEL A MESNIKOFF FOUNDATION INC file?
- Form 990-PF. Private foundations file every year.
- When is the next return of NATHANIEL A MESNIKOFF FOUNDATION INC 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 NATHANIEL A MESNIKOFF FOUNDATION INC 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 NATHANIEL A MESNIKOFF FOUNDATION INC?
- The 990-PF for the year ended December 31, 2025 lists 5 people; 0 received compensation from the organization.
- How much revenue does NATHANIEL A MESNIKOFF FOUNDATION INC have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $212,039, expenses of $131,057 and total assets of $913,446 at year end.
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