Nonprofit · EIN 13-4037172
ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A INC
Tax-exempt · NEW YORK, NY 10013
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $1,365,011 | $4,630,798 | -$3,265,787 | $6,113,003 | $5,767,311 | $345,692 |
| December 31, 2024 | 990-PF | $3,436,652 | $4,294,492 | -$857,840 | $6,473,203 | $2,861,724 | $3,611,479 |
| December 31, 2023 | 990-PF | $4,789,435 | $5,732,030 | -$942,595 | $7,879,688 | $3,410,369 | $4,469,319 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $3,930,000
- Interest
- $443
- Net rental income
- $148,422
- Net gain from sales of assets
- -$2,735,668
- Other income
- $21,814
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $155,000
- Salaries, compensation and benefits (total)
- $570,430
- Disbursements for charitable purposes
- $3,636,107
- Excise tax on investment income
- $6
Balance sheet and other
- Total assets, start of year
- $6,473,203
- Total assets, end of year
- $6,113,003
- Total liabilities, end of year
- $5,767,311
- Net assets, end of year
- $345,692
- Fair market value of assets
- $6,113,003
- Qualifying distributions
- $3,636,107
- Net investment income
- $148,865
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 | Other / benefits |
|---|---|---|---|---|
| CLARE NELSON 394 BROADWAY 3RD FLOOR, NEW YORK, NY 10013 | OFFICE MANAGER Highest-paid employee | 40 | $193,700 | $29,055 |
| KAREN BROOKS HOPKINS 394 BROADWAY, NEW YORK, NY 10013 | SENIOR ADVISOR | 40 | $155,000 | $0 |
| MANTI BOIKOU 394 BROADWAY 3RD FLOOR, NEW YORK, NY 10013 | ADMINISTRATIVE DIREC Highest-paid employee | 40 | $143,000 | $21,450 |
| JAZIA HOMMOUDI 394 BROADWAY 3RD FLOOR, NEW YORK, NY 10013 | DEPUTY PROGRAM DIREC Highest-paid employee | 40 | $111,800 | $16,770 |
| SOFIA PIPA 394 BROADWAY 3RD FLOOR, NEW YORK, NY 10013 | MANAGER Highest-paid employee | 40 | $93,750 | $14,063 |
| DR ANTHONY S PAPADIMITRIOU ESQ 394 BROADWAY, NEW YORK, NY 10013 | PRESIDENT | 4 | $0 | $0 |
| MRS ELENI PANAGIOTAREA 394 BROADWAY, NEW YORK, NY 10013 | BOARD MEMBER | 1 | $0 | $0 |
| DR SIMON CRITCHLEY 394 BROADWAY, NEW YORK, NY 10013 | BOARD MEMBER | 1 | $0 | $0 |
| MICHAEL SOTIRHOS 394 BROADWAY, NEW YORK, NY 10013 | BOARD MEMBER | 1 | $0 | $0 |
990-PF for the year ended December 31, 2024: 9 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| CLARE NELSON 394 BROADWAY 3RD FLOOR, NEW YORK, NY 10013 | OFFICE MANAGER Highest-paid employee | 40 | $161,010 | $25,832 |
| KAREN BROOKS HOPKINS 645 FIFTH AVENUE, NEW YORK, NY 10022 | SENIOR ADVISOR | 40 | $155,000 | $0 |
| MANTI BOIKOU 394 BROADWAY 3RD FLOOR, NEW YORK, NY 10013 | ADMINISTRATIVE DIREC Highest-paid employee | 40 | $119,167 | $17,875 |
| JAZIA HOMMOUDI 394 BROADWAY 3RD FLOOR, NEW YORK, NY 10013 | DEPUTY PROGRAM DIREC Highest-paid employee | 40 | $93,167 | $9,147 |
| SOFIA PIPA 394 BROADWAY 3RD FLOOR, NEW YORK, NY 10013 | MANAGER Highest-paid employee | 40 | $73,667 | $1,622 |
| DR ANTHONY S PAPADIMITRIOU ESQ 645 FIFTH AVENUE, NEW YORK, NY 10022 | PRESIDENT | 4 | $0 | $0 |
| MRS ELENI PANAGIOTAREA 645 FIFTH AVENUE, NEW YORK, NY 10022 | BOARD MEMBER | 1 | $0 | $0 |
| DR SIMON CRITCHLEY 645 FIFTH AVENUE, NEW YORK, NY 10022 | BOARD MEMBER | 1 | $0 | $0 |
| MICHAEL SOTIRHOS 645 FIFTH AVENUE, NEW YORK, NY 10022 | BOARD MEMBER | 1 | $0 | $0 |
990-PF for the year ended December 31, 2023: 6 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| CLARE NELSON 645 FIFTH AVENUE STE 301, NEW YORK, NY 10022 | OFFICE MANAGER Highest-paid employee | 40 | $167,203 | $33,834 |
| KAREN BROOKS HOPKINS 645 FIFTH AVENUE, NEW YORK, NY 10022 | SENIOR ADVISOR | 40 | $155,000 | $0 |
| DR ANTHONY S PAPADIMITRIOU ESQ 645 FIFTH AVENUE, NEW YORK, NY 10022 | PRESIDENT | 4 | $0 | $0 |
| MRS ELENI PANAGIOTAREA 645 FIFTH AVENUE, NEW YORK, NY 10022 | BOARD MEMBER | 1 | $0 | $0 |
| DR SIMON CRITCHLEY 645 FIFTH AVENUE, NEW YORK, NY 10022 | BOARD MEMBER | 1 | $0 | $0 |
| MICHAEL SOTIRHOS 645 FIFTH AVENUE, NEW YORK, NY 10022 | BOARD MEMBER | 1 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 394 BROADWAY 3RD FLOOR, NEW YORK, NY 10013-6023
- In care of
- % ELMER CASTRO
- Signed the 990-PF
- CLARE NELSON, ASSISTANT SECRETARY
- Phone
- (212) 486-4448
- Website
- WWW.ONASSIS.ORG
- Return prepared by
- CBIZ ADVISORS 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
- 13-4037172
- 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
- 1999
- Accounting year ends
- December
- Files
- Form 990-PF
- Category (NTEE)
- Philanthropy, voluntarism and grantmaking foundations (T20)
- Assets (IRS master file)
- $6,113,003
- Income (IRS master file)
- $4,405,585
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | $1,365,011 | $4,630,798 | $6,113,003 | XML |
| 990-PF | December 2024 | $3,436,652 | $4,294,492 | $6,473,203 | XML |
| 990-PF | December 2023 | $4,789,435 | $5,732,030 | $7,879,688 | 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 13-4037172).
Questions about ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A INC
- What is the EIN of ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A INC?
- The employer identification number (EIN) of ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A INC is 13-4037172.
- Is ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1999.
- Are donations to ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A INC file?
- Form 990-PF. Private foundations file every year.
- When is the next return of ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A 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 ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A 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 ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A INC?
- The 990-PF for the year ended December 31, 2025 lists 9 people; 5 received compensation from the organization, the highest $193,700 (CLARE NELSON, OFFICE MANAGER).
- How much revenue does ALEXANDER S ONASSIS PUBLIC BENEFIT FOUNDATION U S A INC have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $1,365,011, expenses of $4,630,798 and total assets of $6,113,003 at year end.
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