Nonprofit · EIN 27-3630528
ARISTIDES DE SOUSA MENDES FOUNDATION-US
Also known as SOUSA MENDES FOUNDATION, Sousa Mendes Foundation
Tax-exempt · GREENLAWN, NY 11740
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $191,286 | $146,006 | $45,280 | $298,134 | $88,678 | $209,456 |
| June 30, 2025 | 990 | $189,751 | $235,448 | -$45,697 | $252,291 | $88,115 | $164,176 |
| June 30, 2024 | 990 | $292,011 | $261,867 | $30,144 | $213,339 | $3,465 | $209,874 |
| June 30, 2023 | 990 | $168,668 | $181,833 | -$13,165 | $304,359 | $124,629 | $179,730 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $110,354
- Program service revenue
- $80,926
- Investment income
- $6
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $12,712
- Other salaries and wages
- $30,502
- Salaries, compensation and benefits (total)
- $32,835
- Professional fundraising fees
- $0
- Accounting fees
- $613
- Program services (functional)
- $96,632
- Management and general (functional)
- $26,788
- Fundraising (functional)
- $22,586
Balance sheet and other
- Total assets, start of year
- $252,291
- Total assets, end of year
- $298,134
- Total liabilities, end of year
- $88,678
- Net assets, end of year
- $209,456
- Net assets without donor restrictions
- $191,038
- Net assets with donor restrictions
- $18,418
- Gross receipts
- $191,286
- Employees
- 1
- Volunteers
- 6
- Year formed
- 2010
- State of legal domicile
- NY
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 for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| OLIVIA MATTIS PHD | PRESIDENT & CEO Trustee or director, Officer | 40 | $51,004 |
| SHARON DOUGLAS | BOARD MEMBER Trustee or director | 2 | $0 |
| MARIANA ABRANTES DE SOUSA | SECRETARY Trustee or director, Officer | 10 | $0 |
| MONIQUE RUBENS KROHN | CHAIR Trustee or director, Officer | 2 | $0 |
| MORDECAI PALDIEL PHD | BOARD MEMBER Trustee or director | 2 | $0 |
| DIANE HARTZ WARSOFF | TREASURER Trustee or director, Officer | 10 | $0 |
990 for the year ended June 30, 2025: 6 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| OLIVIA MATTIS PHD | BOARD PRESIDENT AND CEO Trustee or director, Officer | 40 | $51,004 |
| LEAH SILLS | BOARD MEMBER Trustee or director | 1 | $0 |
| MARIANA ABRANTES DE SOUSA | SECRETARY Trustee or director, Officer | 10 | $0 |
| MONIQUE RUBENS KROHN | CHAIR Trustee or director, Officer | 10 | $0 |
| MORDECAI PALDIEL PHD | BOARD MEMBER Trustee or director | 1 | $0 |
| DIANE HARTZ WARSOFF | TREASURER Trustee or director, Officer | 10 | $0 |
990 for the year ended June 30, 2024: 6 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| OLIVIA MATTIS PHD | BOARD PRESIDENT AND CEO Trustee or director, Officer | 40 | $51,004 |
| LEAH SILLS | BOARD MEMBER Trustee or director | 1 | $0 |
| MARIANA ABRANTES DE SOUSA | TREASURER Trustee or director, Officer | 10 | $0 |
| MONIQUE RUBENS KROHN | SECRETARY Trustee or director, Officer | 10 | $0 |
| MORDECAI PALDIEL PHD | BOARD MEMBER Trustee or director | 1 | $0 |
| JOAN ARNAY HALPERIN | BOARD MEMBER Trustee or director | 1 | $0 |
990 for the year ended June 30, 2023: 7 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| OLIVIA MATTIS PHD | PRESIDENT AND COO Trustee or director, Officer | 40 | $51,004 | $51,004 |
| LEAH SILLS | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| MARIANA ABRANTES DE SOUSA | TREASURER Trustee or director, Officer | 10 | $0 | $0 |
| MONIQUE RUBENS KROHN | VICE PRESIDENT Trustee or director, Officer | 1 | $0 | $0 |
| MORDECAI PALDIEL PHD | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| DANIEL SUBOTINIK ESQ | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| JOAN ARNAY HALPERIN | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 1 TENNYSON PL, GREENLAWN, NY 11740-2701
- In care of
- % HARRY OESTERREICHER
- Mailing address (990-N for 2012)
- 5016 20th Ave NW, Seattle WA 98107
- Principal officer (990 for 2025)
- OLIVIA MATTIS, 1 TENNYSON PLACE, GREENLAWN, NY 11740
- Principal officer (990-N for 2012)
- Harry Oesterreicher, 5016 20th Ave NW, Seattle WA 98107
- Signed the 990
- OLIVIA MATTIS, PRESIDENT
- Phone
- (877) 797-9759
- Return prepared by
- CERINI & ASSOCIATES LLP
Mission
HONOR THE MEMORY OF ARISTIDES DE SOUSA MENDES AND EDUCATE THE WORLD ABOUT HIS GOOD WORK. ITS MISSION IS TO RAISE FUNDS FOR THE RESTORATION OF THE CASA DO PASSAL AND CREATION OF A MUSEUM AND MEMORIAL SITE AND SPONSOR US-BASED PROJECTS THAT PERPETUATE HIS LEGACY.
Program accomplishments
- THE SOUSA MENDES FOUNDATION, DEDICATED TO HONORING THE MEMORY OF THE HOLOCAUST RESCUER ARISTIDES DE SOUSA MENDES AND TO EDUCATING THE WORLD ABOUT HIS GOOD WORK, HAS A TWO-FOLD MISSION: RAISING FUNDS FOR THE RESTORATION OF THE CASA DO PASSAL AND THE CREATION WITHIN ITS WALLS OF A MUSEUM AND MEMORIAL SITE; AND SPONSORING US-BASED PROJECTS THAT PERPETUATE HIS LEGACY.Expenses $96,632 · grants $12,712 · revenue $80,926
What it must file and when
IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in June, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | June 30, 2026 | November 16, 2026 | Not due yet |
| 2024 | June 30, 2025 | November 17, 2025 | 990 on file |
| 2023 | June 30, 2024 | November 15, 2024 | 990 on file |
IRS record
- EIN
- 27-3630528
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (170(b)(1)(A)(vi))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2011
- Accounting year ends
- June
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Arts, culture and humanities (A80)
- Assets (IRS master file)
- $298,134
- Income (IRS master file)
- $191,286
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $191,286 | $146,006 | $298,134 | XML |
| 990 | June 2025 | $189,751 | $235,448 | $252,291 | IRS |
| 990 | June 2024 | $292,011 | $261,867 | $213,339 | XML |
| 990 | June 2023 | $168,668 | $181,833 | $304,359 | XML |
| 990 | June 2022 | $201,857 | $174,532 | $194,324 | IRS |
| 990 | June 2021 | – | – | – | IRS |
| 990 | June 2020 | – | – | – | IRS |
| 990 | June 2018 | – | – | – | IRS |
| 990-N for 2012 Officer: Harry Oesterreicher | June 30, 2013 | ≤ $50,000 receipts | – | – | e-Postcard |
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 27-3630528).
Questions about ARISTIDES DE SOUSA MENDES FOUNDATION-US
- What is the EIN of ARISTIDES DE SOUSA MENDES FOUNDATION-US?
- The employer identification number (EIN) of ARISTIDES DE SOUSA MENDES FOUNDATION-US is 27-3630528.
- Is ARISTIDES DE SOUSA MENDES FOUNDATION-US tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2011.
- Are donations to ARISTIDES DE SOUSA MENDES FOUNDATION-US tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does ARISTIDES DE SOUSA MENDES FOUNDATION-US file?
- Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
- When is the next return of ARISTIDES DE SOUSA MENDES FOUNDATION-US due?
- The return for tax year 2025 (the year ending June 30, 2026) is due November 16, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did ARISTIDES DE SOUSA MENDES FOUNDATION-US last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of ARISTIDES DE SOUSA MENDES FOUNDATION-US?
- The 990 for the year ended December 31, 2025 names OLIVIA MATTIS.
- Who are the officers and directors of ARISTIDES DE SOUSA MENDES FOUNDATION-US?
- The 990 for the year ended December 31, 2025 lists 6 people; 1 received compensation from the organization, the highest $51,004 (OLIVIA MATTIS PHD, PRESIDENT & CEO).
- How much revenue does ARISTIDES DE SOUSA MENDES FOUNDATION-US have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $191,286, expenses of $146,006 and total assets of $298,134 at year end.
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