Grants paid by Thomas L Kempner Jr Foundation
EIN 13-3407819 · Southampton, NY · Form 990-PF, Part XV
Thomas L Kempner Jr Foundation of Southampton, NY (EIN 13-3407819) reported 74 grants paid totaling $56,515,261 to 26 recipients in tax years 2020–2024, on Form 990-PF, Part XV. It also reported $23,249,000 approved for future payment, which is listed separately and not included in the total. Derived from IRS e-file data, dataset version 2026.09.0, built 2026-09-03.
Grants paid
$56,515,261
74 grants
Recipients
26
distinct organizations
Tax years
2020–2024
4 filings in the corpus
Approved for future payment
$23,249,000
15 commitments · not included in grants paid
By tax year
| Tax year | Grants paid | Amount paid | Approved for future |
|---|---|---|---|
| 2020 | 9 | $10,901,065 | — |
| 2022 | 18 | $16,443,883 | — |
| 2023 | 25 | $17,594,561 | $21,559,000 |
| 2024 | 22 | $11,575,752 | $1,690,000 |
Top recipients
The 26 recipients receiving the most from Thomas L Kempner Jr Foundation, by grants paid, out of 26 distinct recipients.
| Recipient | Match | Location | Grants | Total paid | Latest year |
|---|---|---|---|---|---|
| Central Park Conservancy 13-3022855 | B | New York, NY | 5 | $16,437,999 | 2024 |
| Jewish Communal Fund 23-7174183 | B | New York, NY | 4 | $12,760,000 | 2024 |
| Mount Sinai Hospital 13-1624096 | B | New York, NY | 3 | $6,000,000 | 2024 |
| Harlem Village Academies 22-3880680 | D | New York, NY | 4 | $2,863,000 | 2024 |
| Planned Parenthood Federation of America Inc 13-1644147 | D | New York, NY | 2 | $2,500,000 | 2024 |
| Wildlife Conservation Society 13-1740011 | B | Bronx, NY | 3 | $2,500,000 | 2024 |
| Open Space Institute Land Trust Inc 13-3028060 | B | New York, NY | 3 | $1,786,858 | 2023 |
| American Museum of Natural History | U | New York, NY | 2 | $1,250,000 | 2024 |
| Transportation Alternatives Inc 51-0186015 | B | New York, NY | 3 | $1,200,000 | 2024 |
| Roundabout Theatre Company 13-6192346 | B | New York, NY | 2 | $1,200,000 | 2023 |
| Businesses United in Investing Lending and Development 94-3386695 | B | Redwood City, CA | 3 | $1,050,000 | 2024 |
| Achievement First Charter School | U | New Haven, CT | 4 | $1,050,000 | 2024 |
| Juilliard School 13-1624067 | B | New York, NY | 2 | $1,000,000 | 2023 |
| Columbia University Medical Center 13-3948652 | D | New York, NY | 2 | $999,000 | 2023 |
| Bletchley Park | U | Bletchley | 3 | $718,744 | 2024 |
| Harvard Business School | U | Boston, MA | 6 | $645,000 | 2024 |
| Open Space Institute Inc 52-1053406 | B | New York, NY | 1 | $519,660 | 2024 |
| Tides Center 94-3213100 | B | San Francisco, CA | 3 | $510,000 | 2024 |
| Yale University | U | New Haven, CT | 7 | $440,000 | 2024 |
| Stanford University Board of Trustees 94-0894150 | D | Stanford, CA | 5 | $410,000 | 2024 |
| The New York Community Trust - Ecap NYC 13-3062214 | C | New York, NY | 1 | $250,000 | 2020 |
| Rare Inc 23-7380563 | B | Arlington, VA | 1 | $200,000 | 2024 |
| Parks & Trails 14-1753475 | D | Albany, NY | 1 | $90,000 | 2024 |
| Peer Health Exchange | U | New York, NY | 1 | $75,000 | 2020 |
| Boston Children's Hospital Trust | U | Boston, MA | 2 | $50,000 | 2023 |
| Philharmonic-Symphony Society of New York Inc 13-1664054 | B | New York, NY | 1 | $10,000 | 2023 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Every grant
All 89 grant rows this organization reported, most recent first.
| Tax year | Recipient | Match | Amount | Type | Purpose | Source filing |
|---|---|---|---|---|---|---|
| 2024 | Jewish Communal Fund New York, NY | B | $3,235,000 | paid | DAF REPLENISHMENT -THOMAS L. KEMPNER JR. FOUNDATION INC. FUND | 202543089349101329 |
| 2024 | Mount Sinai Hospital New York, NY | B | $2,000,000 | paid | PRESIDENT'S STRATEGIC INITIATIVE FUND | 202543089349101329 |
| 2024 | Planned Parenthood Federation of America Inc New York, NY | D | $1,250,000 | paid | PROVIDER RECRUITMENT, PATIENT NAVIGATION & EPIC | 202543089349101329 |
| 2024 | Wildlife Conservation Society Bronx, NY | B | $1,000,000 | paid | MARINE STRONGHOLDS AND BLUE CARBON | 202543089349101329 |
| 2024 | Harlem Village Academies New York, NY | D | $944,000 | paid | ACCELERATED MATHEMATICS PHASE II | 202543089349101329 |
| 2024 | Open Space Institute Inc New York, NY | B | $519,660 | paid | GREENWAY TRAILS ACQUISITION PROGRAM | 202543089349101329 |
| 2024 | Stanford University Board of Trustees Stanford, CA | D | $500,000 | approved, future | CRIMINAL JUSTICE CENTER/THREE STRIKES PROJECT | 202543089349101329 |
| 2024 | Yale University New Haven, CT | U | $440,000 | approved, future | YALE | 202543089349101329 |
| 2024 | Transportation Alternatives Inc New York, NY | B | $400,000 | paid | GENERAL OPERATING | 202543089349101329 |
| 2024 | Businesses United in Investing Lending and Development Redwood City, CA | B | $350,000 | paid | SUPPORT AND LICENSED PARTNERSHIPS | 202543089349101329 |
| 2024 | Rare Arlington, VA | B | $300,000 | approved, future | RARE BRAZIL'S FISH FOREVER PROGRAM - COMMUNITY-LED MANAGEMENT OF THE AMAZON COAST | 202543089349101329 |
| 2024 | Tides Center San Francisco, CA | B | $300,000 | approved, future | DA OFFICE PROJECT | 202543089349101329 |
| 2024 | American Museum of Natural History New York, NY | U | $250,000 | paid | FUTTER FUND FOR SCIENCE AND SOCIETY | 202543089349101329 |
| 2024 | Achievement First Charter School New Haven, CT | U | $250,000 | paid | CT GENERAL OPERATIONS | 202543089349101329 |
| 2024 | Harvard Business School Boston, MA | U | $250,000 | paid | DEAN'S INNOVATION FUND | 202543089349101329 |
| 2024 | Rare Inc Arlington, VA | B | $200,000 | paid | RARE BRAZIL'S FISH FOREVER PROGRAM - COMMUNITY-LED MANAGEMENT OF THE AMAZON COAST | 202543089349101329 |
| 2024 | Bletchley Park Bletchley | U | $175,425 | paid | BLOCK B LEARNING CENTRE | 202543089349101329 |
| 2024 | Central Park Conservancy New York, NY | B | $166,667 | paid | ESSENTIAL CENTRAL PARK FUND | 202543089349101329 |
| 2024 | Tides Center San Francisco, CA | B | $150,000 | paid | DA OFFICE PROJECT | 202543089349101329 |
| 2024 | Kabuki Syndrome Foundation Northbrook, IL | B | $150,000 | approved, future | GENERAL OPERATING | 202543089349101329 |
| 2024 | Yale University New Haven, CT | U | $100,000 | paid | FUND FOR CIVIC ENGAGEMENT AND DISCOURSE | 202543089349101329 |
| 2024 | Yale University New Haven, CT | U | $100,000 | paid | FUND FOR YALE SCHOOL OF ENGINEERING & APPLIED SCIENCE | 202543089349101329 |
| 2024 | Parks & Trails Albany, NY | D | $90,000 | paid | GREENWAYS ACROSS NEW YORK STATE VIA THE EST 2.0 PROPOSAL | 202543089349101329 |
| 2024 | Stanford University Board of Trustees Stanford, CA | D | $75,000 | paid | CRIMINAL JUSTICE CENTER/THREE STRIKES PROJECT | 202543089349101329 |
| 2024 | Stanford University Board of Trustees Stanford, CA | D | $45,000 | paid | SALLYANNE PAYTON FELLOWSHIP FUND, CENTER FOR RACIAL JUSTICE AND BLSA FUND | 202543089349101329 |
| 2024 | Yale University New Haven, CT | U | $20,000 | paid | ANNUAL FUND | 202543089349101329 |
| 2024 | Harvard Business School Boston, MA | U | $5,000 | paid | ANNUAL FUND | 202543089349101329 |
| 2023 | Roundabout Theatre Company Inc New York, NY | C | $15,000,000 | approved, future | 42ND STREET RENOVATION | 202443199349100829 |
| 2023 | Central Park Conservancy New York, NY | B | $5,314,000 | paid | HARLEM MEER POOL AND ICE RINK DEVELOPMENT | 202443199349100829 |
| 2023 | Jewish Communal Fund New York, NY | B | $2,850,000 | paid | DAF REPLENISHMENT -THOMAS L. KEMPNER JR. FOUNDATION INC. FUND | 202443199349100829 |
| 2023 | Harlem Village Academies New York, NY | D | $2,038,000 | approved, future | ACCELERATED MATHEMATICS PHASE II | 202443199349100829 |
| 2023 | Mount Sinai Hospital New York, NY | B | $2,000,000 | paid | PEDIATRIC CARDIAC INTENSIVE CARE UNIT - PRESIDENT'S STRATEGIC INITIATIVE FUND | 202443199349100829 |
| 2023 | Wildlife Conservation Society Bronx, NY | B | $1,250,000 | paid | MARINE STRONGHOLDS/MPA 2030 AND BLUE CARBON | 202443199349100829 |
| 2023 | Planned Parenthood Federation of America Inc New York, NY | D | $1,250,000 | paid | PROVIDER RECRUITMENT, PATIENT NAVIGATION & EPIC | 202443199349100829 |
| 2023 | Open Space Institute Land Trust Inc New York, NY | B | $1,100,000 | approved, future | GREENWAY TRAILS ACQUISITION PROGRAM | 202443199349100829 |
| 2023 | American Museum of Natural History New York, NY | U | $1,000,000 | approved, future | FUTTER FUND FOR SCIENCE AND SOCIETY | 202443199349100829 |
| 2023 | Columbia University Medical Center New York, NY | D | $879,000 | paid | VAGELOS COLLEGE EARLY-ONSET OSTEOPOROSIS FUND | 202443199349100829 |
| 2023 | Harlem Village Academies New York, NY | D | $819,000 | paid | ACCELERATED MATHEMATICS PHASE II | 202443199349100829 |
| 2023 | Achievement First Charter School New Haven, CT | U | $750,000 | approved, future | CT GENERAL OPERATIONS | 202443199349100829 |
| 2023 | Juilliard School New York, NY | B | $500,000 | paid | NUCLEUS FUND PLEDGE | 202443199349100829 |
| 2023 | Columbia University Medical Center New York, NY | D | $421,000 | approved, future | VAGELOS COLLEGE EARLY-ONSET OSTEOPOROSIS FUND | 202443199349100829 |
| 2023 | Yale University New Haven, CT | U | $400,000 | approved, future | KEMPNER FUND FOR YALE SCHOOL OF ENGINEERING & APPLIED SCIENCE | 202443199349100829 |
| 2023 | Yale University New Haven, CT | U | $400,000 | approved, future | KEMPNER FUND FOR YALE COLLEGE DEAN'S DISCRETIONARY FUND FOR CIVIC ENGAGEMENT AND DISCOURSE | 202443199349100829 |
| 2023 | Transportation Alternatives Inc New York, NY | B | $400,000 | paid | 3 YEAR GENERAL OPERATING PLEDGE | 202443199349100829 |
| 2023 | Parks & Trails Albany, NY | D | $375,000 | approved, future | GREENWAYS ACROSS NEW YORK STATE VIA THE EST 2.0 PROPOSAL | 202443199349100829 |
| 2023 | Businesses United in Investing Lending and Development Redwood City, CA | B | $350,000 | paid | NYC & BAY AREA OPERATIONS | 202443199349100829 |
| 2023 | Open Space Institute Land Trust Inc New York, NY | B | $338,687 | paid | ESSEX-HUDSON GREENWAY | 202443199349100829 |
| 2023 | Bletchley Park Bletchley | U | $332,208 | paid | BLOCK E LEARNING CENTRE | 202443199349100829 |
| 2023 | Harvard Business School Boston, MA | U | $250,000 | paid | DEAN'S INNOVATION FUND | 202443199349100829 |
| 2023 | Achievement First Charter School New Haven, CT | U | $250,000 | paid | CT GENERAL OPERATIONS | 202443199349100829 |
| 2023 | Tides Center San Francisco, CA | B | $175,000 | paid | FAIR AND JUST PROSECUTION | 202443199349100829 |
| 2023 | Central Park Conservancy New York, NY | B | $166,666 | paid | ESSENTIAL CENTRAL PARK FUND | 202443199349100829 |
| 2023 | Yale University New Haven, CT | U | $100,000 | paid | KEMPNER FUND FOR YALE SCHOOL OF ENGINEERING & APPLIED SCIENCE | 202443199349100829 |
| 2023 | Yale University New Haven, CT | U | $100,000 | paid | KEMPNER FUND FOR YALE COLLEGE DEAN'S DISCRETIONARY FUND FOR CIVIC ENGAGEMENT AND DISCOURSE | 202443199349100829 |
| 2023 | Roundabout Theatre Company Inc New York, NY | C | $100,000 | paid | GENERAL OPERATIONS GRANT | 202443199349100829 |
| 2023 | Stanford University Board of Trustees Stanford, CA | D | $75,000 | approved, future | CRIMINAL JUSTICE CENTER/THREE STRIKES PROJECT | 202443199349100829 |
| 2023 | Stanford University Board of Trustees Stanford, CA | D | $75,000 | paid | CRIMINAL JUSTICE CENTER/THREE STRIKES PROJECT | 202443199349100829 |
| 2023 | Stanford University Board of Trustees Stanford, CA | D | $45,000 | paid | SALLYANNE PAYTON FELLOWSHIP FUND, CENTER FOR RACIAL JUSTICE AND BLSA FUND | 202443199349100829 |
| 2023 | Boston Children's Hospital Trust Boston, MA | U | $25,000 | paid | KABUKI SYNDROME RESEARCH | 202443199349100829 |
| 2023 | Philharmonic-Symphony Society of New York Inc New York, NY | B | $10,000 | paid | ORCHESTRA'S EDUCATION PROGRAM GRANT | 202443199349100829 |
| 2023 | Yale University New Haven, CT | U | $10,000 | paid | ANNUAL FUND | 202443199349100829 |
| 2023 | Harvard Business School Boston, MA | U | $5,000 | paid | ANNUAL FUND | 202443199349100829 |
| 2022 | Central Park Conservancy New York, NY | B | $5,478,666 | paid | SUPPORT OF THE ENDOWMENT COMPONENT OF THE CONSERVANCY'S FOR ALL CAMPAIGN | 202313199349101301 |
| 2022 | Jewish Communal Fund New York, NY | B | $4,150,000 | paid | GENERAL UNRESTRICTED | 202313199349101301 |
| 2022 | Mount Sinai Hospital New York, NY | B | $2,000,000 | paid | TO BE USED SOLELY TO SUPPORT THE PEDIATRIC CARDIAC INTENSIVE CARE UNIT, A PRIORITY PROGRAM UNDER THE PRESIDENT'S STRATEGIC INITIATIVE FUND, AS RECOMMENDED BY KENNETH L. DAVIS, MD, PRESIDENT AND CHIEF EXECUTIVE OFFICER OF THE MOUNT SINAI HEALTH SYSTEM. | 202313199349101301 |
| 2022 | American Museum of Natural History New York, NY | U | $1,000,000 | paid | TO SUPPORT THE NEW GILDER CENTER FOR SCIENCE, EDUCATION AND INNOVATION | 202313199349101301 |
| 2022 | Open Space Institute Land Trust Inc New York, NY | B | $614,106 | paid | GRANT EXCLUSIVELY FOR PROJECT EXPENSES ASSOCIATED WITH THE ESSEX HUDSON GREENWAY. | 202313199349101301 |
| 2022 | Harlem Village Academies New York, NY | D | $600,000 | paid | FUNDING WILL SOLELY SUPPORT THE LAUNCH OF HVA'S ACCELERATED MATHEMATICS PROGRAM | 202313199349101301 |
| 2022 | Juilliard School New York, NY | B | $500,000 | paid | DESIGNATED FOR THE NUCLEUS FUND, TO LAY THE FOUNDATION FOR A SUCCESSFUL CAPITAL CAMPAIGN BY ADDRESSING CRITICAL PRIORITIES THAT NEED TO BE RESOURCED IN THE EARLY PHASE. | 202313199349101301 |
| 2022 | Transportation Alternatives Inc New York, NY | B | $400,000 | paid | GENERAL UNRESTRICTED | 202313199349101301 |
| 2022 | Businesses United in Investing Lending and Development Redwood City, CA | B | $350,000 | paid | NEW YORK CITY OPERATIONS AND PROGRAM GROWTH BAY AREA OPERATIONS AND SOCIAL ENTREPRENEURSHIP - $175,000/YRNATIONAL GROWTH THROUGH DIGITIZATION OF CURRICULUM AND LICENSED PARTNERSHIPS $50,000ADDITIONAL LICENSED PARTNERSHIPS CONTINGENCY - $75,000/YR | 202313199349101301 |
| 2022 | Wildlife Conservation Society Bronx, NY | B | $250,000 | paid | MPA FUND - WESTERN INDIAN OCEAN, BAY OF BENGAL OR PAPUA NEW GUINEA. | 202313199349101301 |
| 2022 | Achievement First Charter School New Haven, CT | U | $250,000 | paid | GENERAL UNRESTRICTED | 202313199349101301 |
| 2022 | Bletchley Park Bletchley | U | $211,111 | paid | TO BE USED SOLELY TO SUPPORT THE TRANSFORMATION OF BLOCK E AT BLETCHLEY PARK INTO A NEW LEARNING CENTRE, COMPRISING A 250-SEAT LECTURE THEATRE, EIGHT LEARNING SPACES, AND ASSOCIATED SUPPORT FACILITIES ('THE PROJECT'). | 202313199349101301 |
| 2022 | Tides Center San Francisco, CA | B | $185,000 | paid | FAIR AND JUST PROSECUTION | 202313199349101301 |
| 2022 | Stanford University Board of Trustees Stanford, CA | D | $170,000 | paid | SALLYANNE PAYTON FELLOWSHIP FUND, THE STANFORD CENTER FOR RACIAL JUSTICE, THE BLACK LAW STUDENTS ASSOCIATION AWARD FUND | 202313199349101301 |
| 2022 | Harvard Business School Boston, MA | U | $130,000 | paid | GENERAL UNRESTRICTED | 202313199349101301 |
| 2022 | Columbia University Medical Center New York, NY | D | $120,000 | paid | FOR THE BENEFIT OF ITS VAGELOS COLLEGE OF PHYSICIANS AND SURGEONS, DEPARTMENT OF MEDICINE, DIVISION OF ENDOCRINOLOGY. | 202313199349101301 |
| 2022 | Boston Children's Hospital Trust Boston, MA | U | $25,000 | paid | TO SUPPORT KABUKI SYNDROME RESEARCH AT BOSTON CHILDREN'S HOSPITAL, UNDER THE DIRECTION OF OLAF BODAMER, MD, PHD, FACMG, FAAP, ASSOCIATE CHIEF OF GENETICS AND GENOMICS. | 202313199349101301 |
| 2022 | Yale University New Haven, CT | U | $10,000 | paid | GENERAL UNRESTRICTED | 202313199349101301 |
| 2020 | Central Park Conservancy New York, NY | B | $5,312,000 | paid | GENERAL UNRESTRICTED | 202113159349103106 |
| 2020 | Jewish Communal Fund New York, NY | B | $2,525,000 | paid | GENERAL UNRESTRICTED | 202113159349103106 |
| 2020 | Roundabout Theatre Company New York, NY | B | $1,100,000 | paid | GENERAL UNRESTRICTED | 202113159349103106 |
| 2020 | Open Space Institute Land Trust Inc New York, NY | B | $834,065 | paid | GENERAL UNRESTRICTED | 202113159349103106 |
| 2020 | Harlem Village Academies New York, NY | D | $500,000 | paid | GENERAL UNRESTRICTED | 202113159349103106 |
| 2020 | Achievement First Charter School New Haven, CT | U | $300,000 | paid | GENERAL UNRESTRICTED | 202113159349103106 |
| 2020 | The New York Community Trust - Ecap NYC New York, NY | C | $250,000 | paid | GENERAL UNRESTRICTED | 202113159349103106 |
| 2020 | Peer Health Exchange New York, NY | U | $75,000 | paid | GENERAL UNRESTRICTED | 202113159349103106 |
| 2020 | Harvard Business School Boston, MA | U | $5,000 | paid | GENERAL UNRESTRICTED | 202113159349103106 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Recipient matching for this dataset version has not yet completed its independent precision check. Tier A rows carry the EIN the filer reported; tiers B–D are the matcher's inference and should be read as leads until the check is published on the methodology page.
Source filings
Every figure above is traceable to one of these IRS e-file returns by its OBJECT_ID.
| Form | Tax year | Period end | Filed | Schema | IRS OBJECT_ID |
|---|---|---|---|---|---|
| 990PF | 2024 | 2024-12-31 | not stated | 2024v5.2 | 202543089349101329 |
| 990PF | 2023 | 2023-12-31 | not stated | 2023v5.1 | 202443199349100829 |
| 990PF | 2022 | 2022-12-31 | not stated | 2022v5.0 | 202313199349101301 |
| 990PF | 2020 | 2020-12-31 | not stated | 2020v4.1 | 202113159349103106 |
Derived from IRS Form 990-PF e-file XML; recipient identities from the IRS Exempt Organizations Business Master File. Dataset version 2026.09.0, built 2026-09-03. The same rows as Parquet: manifest; as JSON: /api/funders/133407819.json.
The same organization elsewhere in the program: exempt status and filing health · federal awards · grant guidance · open opportunities.
This is informational only, derived from public data on the dates shown. It is not an eligibility determination, and not legal, tax, or accounting advice. Verify against the official source before relying on it.