The marshmere Foundation concentrates its giving on a small number of sizable, strategic grants that advance health, medical research, and child & family services. Its portfolio mixes local NYC-focused philanthropy (notably child welfare) with global health and social-impact innovation, including health systems strengthening and technology for public health. Grants tend to be programmatic and catalytic—supporting institutions, applied research, and organizations that scale health or social impact.
Concentrated, high-dollar grants to a small set of organizations—frequently repeat grantees—with a mix of local institutional support and international health investments; grants appear strategic/catalytic rather than broad, small-dollar philanthropy.
A $1.25 million general-support grant to Graham Windham Services in 2025 captures the marshmere Foundation’s pattern: large, strategic awards to organizations working in health, child welfare, and family services. Across the recent grants, the foundation backs both New York City-based institutions and national or global health actors, with repeat support for groups such as Population Services International and Icahn School of Medicine. It also funds health technology and nonprofit infrastructure, including PathCheck and Acumen Fund Inc, which points to an interest in systems-level change rather than one-off project funding. The foundation’s portfolio is mixed in scope. Some grants support direct service organizations in New York, while others go to medical research, public health delivery, family planning, and broader social-impact work. Several awards are labeled general support, which is consistent with a funding style that appears to trust grantees’ operating priorities. Recent giving also includes smaller, targeted awards alongside very large ones, showing a portfolio that combines core support for established institutions with more modest support for a wider set of organizations.
Child welfare and family services are a visible part of the marshmere Foundation’s giving. In 2025, it awarded $1,250,000 to Graham Windham Services for general support, and in 2023 it gave $100,000 to Graham-windham for general support. Public health and family planning also appear prominently. The foundation gave $614,449 to Population Services International in 2023 and followed with another $250,008 grant in 2025, both for general support. It also supported Integrate Health with $250,000 in 2025. Medical and academic medicine funding is another thread. Icahn School of Medicine received $500,000 in 2023 and $250,000 in 2025, both as general support. The foundation has also backed health technology and social-impact capacity building, including $244,438 to PATH CHECK inc in 2023 and $250,000 to Acumen Fund Inc in 2025.
Typical grant size is tightly clustered at the low end for many awards: p25 is $2,500 and median is $2,500, while p75 rises to $25,000. That distribution sits alongside a smaller number of large grants, including seven-figure and mid-six-figure awards. The pattern suggests a core portfolio of modest gifts with a separate set of major institutional grants. The grants list shows support in both 2023 and 2025 to the same recipients, including Population Services International and Icahn School of Medicine, indicating repeat support rather than purely one-time giving. Most awards are labeled general support, and the foundation does not fund individuals or make program-related investments.
$2.5M
$56.9M
$8.4M
$3.2M
Most grants fall between $3K and $25K, with a median of $3K.
25th Percentile
$3K
Median
$3K
75th Percentile
$25K
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Notable grantees: Graham Windham Services, Population Services International, Icahn School of Medicine, Integrate Health, Acumen Fund
Grantmaking is national, with recipients in 100% U.S.-based locations in the recent grants list. New York is a major recipient state, accounting for 32% of grants, and New York City organizations appear frequently, including Graham Windham Services, Icahn School of Medicine, Acumen Fund Inc, and Harmony Program. Outside New York, the foundation gives often in Oklahoma by grant count, while other recent recipients include Washington, DC; Dallas; Austin; Cambridge; and Jacksonville. The recent grants list does not show non-U.S. recipient countries.
Recent grants point to child welfare and family services, public health and family planning, medical research and academic medicine, health technology for public health, and social-impact investing support. Examples include Graham Windham Services, Population Services International, Icahn School of Medicine, PathCheck, and Acumen Fund Inc.
The grant-size distribution is bimodal: p25 is $2,500, median is $2,500, and p75 is $25,000. That sits alongside several much larger awards, including $1,250,000 to Graham Windham Services and $614,449 to Population Services International.
Yes. Population Services International appears in both 2023 and 2025, with grants of $614,449 and $250,008. Icahn School of Medicine also appears in both years, with $500,000 in 2023 and $250,000 in 2025.
Many recent awards are labeled general support. That includes large grants to Graham Windham Services, Population Services International, Icahn School of Medicine, and Acumen Fund Inc, as well as smaller grants such as those to Crisis Text Line and The Philanthropy Workshop.
2025
Source: IRS Form 990-PF, fiscal year 2025.
Most recent grants reported to the IRS.
| Recipient | Location | Amount | Year | Purpose |
|---|---|---|---|---|
| GRAHAM WINDHAM SERVICES | NEW YORK, NY | $1,250,000 | 2025 | GENERAL SUPPORT |
| POPULATION SERVICES INTERNATIONAL | WASHINGTON, DC | $250,008 | 2025 | GENERAL SUPPORT |
| ICAHN SCHOOL OF MEDICINE | NEW YORK, NY | $250,000 | 2025 | GENERAL SUPPORT |
| ACUMEN FUND INC | NEW YORK, NY | $250,000 | 2025 | GENERAL SUPPORT |
| INTEGRATE HEALTH | RALEIGH, NC | $250,000 | 2025 | GENERAL SUPPORT |
| MAIN SPRING | JACKSONVILLE, FL | $100,000 | 2025 | GENERAL SUPPORT |
| IDAHO STATE UNIVERSITY | POCATELLO, ID | $78,125 | 2025 | GENERAL SUPPORT |
| HARMONY PROGRAM | NEW YORK, NY | $25,000 | 2025 | GENERAL SUPPORT |
| THE PHILANTHROPY WORKSHOP | NEW YORK, NY | $12,000 | 2025 | GENERAL SUPPORT |
| THRU CD&R FUND X ADVISOR ENERGY A LP | NEW YORK, NY | $168 | 2025 | GENERAL SUPPORT |
| THRU CD&R FUND X ADVISOR ORANGE A LP | NEW YORK, NY | $35 | 2025 | GENERAL SUPPORT |
| THRU CD&R FUND XI ADVISOR AIV A LP | NEW YORK, NY | $26 | 2025 | GENERAL SUPPORT |
| THRU CD&R FUND X ADVISOR WATERWORKS A LP | NEW YORK, NY | $1 | 2025 | GENERAL SUPPORT |
| ICAHN SCHOOL OF MEDICINE | NEW YORK, NY | $974,520 | 2024 | GENERAL SUPPORT |
| LOST TREE VILLAGE CHARITY | NORTH PALM BEACH, FL | $500,000 | 2024 | GENERAL SUPPORT |
| POPULATION SERVICES INTERNATIONAL | WASHINGTON, DC | $409,222 | 2024 | GENERAL SUPPORT |
| PATH CHECKING | SEATTLE, WA | $105,562 | 2024 | GENERAL SUPPORT |
| HEALTH ACCESS CONNECT US | TAMPA, FL | $105,000 | 2024 | GENERAL SUPPORT |
| MAIN SPRING | JACKSONVILLE, FL | $100,000 | 2024 | GENERAL SUPPORT |
| HARMONY PROGRAM | NEW YORK, NY | $25,000 | 2024 | GENERAL SUPPORT |
| ALEXANDER TWILIGHT ACADEMY | BOSTON, MA | $15,000 | 2024 | GENERAL SUPPORT |
| THE PHILANTHROPY WORKSHOP | NEW YORK, NY | $12,000 | 2024 | GENERAL SUPPORT |
| THRU CD&R FUND X ADVISOR ENERGY A LP | NEW YORK, NY | $273 | 2024 | GENERAL SUPPORT |
| THRU CD&R FUND X ADVISOR WATERWORKS A LP | NEW YORK, NY | $121 | 2024 | GENERAL SUPPORT |
| THRU CD&R FUND X ADVISOR ORANGE A LP | NEW YORK, NY | $69 | 2024 | GENERAL SUPPORT |
| THRU MAGELLAN MIDSTREAM PARTNERS LP | TULSA, OK | $18 | 2024 | GENERAL SUPPORT |
| THRU CD&R FUND XI ADVISOR AIV A LP | NEW YORK, NY | $16 | 2024 | GENERAL SUPPORT |
| POPULATION SERVICES INTERNATIONAL | WASHINGTON, DC | $614,449 | 2023 | GENERAL SUPPORT |
| ICAHN SCHOOL OF MEDICINE | NEW YORK, NY | $500,000 | 2023 | GENERAL SUPPORT |
| LOST TREE VILLAGE CHARITY | NORTH PALM BEACH, FL | $500,000 | 2023 | SUPPORT |
| PATH CHECK inc | cambridge, MA | $244,438 | 2023 | GENERAL SUPPORT |
| GRAHAM-WINDHAM | NEW YORK, NY | $100,000 | 2023 | GENERAL SUPPORT |
| WORLD CENTRAL KITCHEN | WASHINGTON, DC | $25,000 | 2023 | GENERAL SUPPORT |
| USA FOR UNHCR | NEW YORK, NY | $25,000 | 2023 | GENERAL SUPPORT |
| HEALTH ACCESS CONNECT US | DALLAS, TX | $25,000 | 2023 | GENERAL SUPPORT |
| NATIONAL NETWORK OF ABORTION FUNDS | BEAVERTON, OR | $25,000 | 2023 | GENERAL SUPPORT |
| CRISIS TEXT LINE | NEW YORK, NY | $10,000 | 2023 | GENERAL SUPPORT |
| CLINIC ACCESS SUPPORT NETWORK | DALLAS, TX | $2,500 | 2023 | GENERAL SUPPORT |
| The Lilith Fund | austin, TX | $2,500 | 2023 | GENERAL SUPPORT |
| THE BRIDGE COLLECTIVE | BLUFFTON, SC | $2,500 | 2023 | GENERAL SUPPORT |
| JANES DUE PROCESS | AUSTIN, TX | $2,500 | 2023 | GENERAL SUPPORT |
| FUND TEXAS CHOICE | AUSTIN, TX | $2,500 | 2023 | GENERAL SUPPORT |
| Frontera Fund | mcallen, TX | $2,500 | 2023 | GENERAL SUPPORT |
| WHOLE WOMAN'S HEALTH | CHARLOTTESVILLE, VA | $2,500 | 2023 | GENERAL SUPPORT |
| tea fund | dallas, TX | $2,500 | 2023 | GENERAL SUPPORT |
| westfund | el paso, TX | $2,500 | 2023 | general support |
| THRU CD&R FUND X ADVISOR ENERGY A LP | NEW YORK, NY | $266 | 2023 | GENERAL SUPPORT |
| THRU CD&R FUND X ADVISOR WATERWORKS A LP | NEW YORK, NY | $118 | 2023 | GENERAL SUPPORT |
| THRU CD&R FUND X ADVISOR ORANGE A LP | NEW YORK, NY | $82 | 2023 | GENERAL SUPPORT |
| THRU CD&R FUND XI ADVISOR AIV A LP | NEW YORK, NY | $34 | 2023 | GENERAL SUPPORT |
MAIN SPRING
$100,000GENERAL SUPPORT
IDAHO STATE UNIVERSITY
$78,125GENERAL SUPPORT
THRU CD&R FUND X ADVISOR ENERGY A LP
$168GENERAL SUPPORT
THRU CD&R FUND X ADVISOR ORANGE A LP
$35GENERAL SUPPORT
THRU CD&R FUND XI ADVISOR AIV A LP
$26GENERAL SUPPORT
THRU CD&R FUND X ADVISOR WATERWORKS A LP
$1GENERAL SUPPORT
LOST TREE VILLAGE CHARITY
$500,000GENERAL SUPPORT
PATH CHECKING
$105,562GENERAL SUPPORT
HEALTH ACCESS CONNECT US
$105,000GENERAL SUPPORT
MAIN SPRING
$100,000GENERAL SUPPORT
THRU CD&R FUND X ADVISOR ENERGY A LP
$273GENERAL SUPPORT
THRU CD&R FUND X ADVISOR WATERWORKS A LP
$121GENERAL SUPPORT
THRU CD&R FUND X ADVISOR ORANGE A LP
$69GENERAL SUPPORT
THRU MAGELLAN MIDSTREAM PARTNERS LP
$18GENERAL SUPPORT
THRU CD&R FUND XI ADVISOR AIV A LP
$16GENERAL SUPPORT
LOST TREE VILLAGE CHARITY
$500,000SUPPORT
PATH CHECK inc
$244,438GENERAL SUPPORT
USA FOR UNHCR
$25,000GENERAL SUPPORT
HEALTH ACCESS CONNECT US
$25,000GENERAL SUPPORT
NATIONAL NETWORK OF ABORTION FUNDS
$25,000GENERAL SUPPORT
THE BRIDGE COLLECTIVE
$2,500GENERAL SUPPORT
WHOLE WOMAN'S HEALTH
$2,500GENERAL SUPPORT
tea fund
$2,500GENERAL SUPPORT
westfund
$2,500general support
THRU CD&R FUND X ADVISOR ENERGY A LP
$266GENERAL SUPPORT
THRU CD&R FUND X ADVISOR WATERWORKS A LP
$118GENERAL SUPPORT
THRU CD&R FUND X ADVISOR ORANGE A LP
$82GENERAL SUPPORT
THRU CD&R FUND XI ADVISOR AIV A LP
$34GENERAL SUPPORT