The Winslow Foundation concentrates its giving on climate and planetary health and on civic/democracy work, funding both grassroots advocacy and academic research. It makes a small number of large grants—often unrestricted support to activist organizations and project-specific grants to university programs—frequently renewing support for the same organizations. Grants appear national in scope and emphasize the intersection of environment and public health as well as efforts to strengthen democratic institutions.
The Winslow Foundation’s largest recent awards center on planetary health: a $426,667 grant to Johns Hopkins University for the Planetary Health Alliance and a $200,000 grant to the same alliance in 2025. That research emphasis sits alongside sustained support for climate organizing and democracy work, giving the foundation a profile that mixes university-led inquiry with grassroots advocacy and civic engagement. Across its recent grants, the foundation has repeatedly backed the same organizations, including Mothers Out Front Inc, Keep Our Republic Charitable Fund, and Marine Conservation Biology Institute, which suggests long-running relationships rather than one-off awards. The mix of grantees ranges from academic programs and health alliances to advocacy funds and conservation organizations. Grants have also supported climate-health fellows programs, conservation biology work, and election-integrity efforts, showing that the foundation funds both the scientific and organizing sides of climate-related work. Its latest grants show a pattern of meaningful operating support as well as project-specific funding, with award sizes often substantial enough to support multi-part initiatives or institutional programs.
Planetary health is a defining theme. Winslow Foundation gave $426,667 to Johns Hopkins University for the Planetary Health Alliance and $200,000 to Harvard University for the Planetary Health Alliance - Project, tying climate and health research to university-based networks. In climate-health organizing, they supported Cambridge Health Alliance Foundation Inc with $112,760 for the CHEEA Climate Health Organizing Fellows program and later $100,000 for the Climate Health Organizing Fellows Program. Conservation and biodiversity also appear in the portfolio: Stanford University received $100,000 for the Center for Conservation Biology and another $100,000 for the Conservation Center for Biology, while Marine Conservation Biology Institute received $80,000 for general & unrestricted support. Democratic participation is another recurring line of giving, including $175,000 to Keep Our Republic Charitable Fund for general & unrestricted support and $50,000 to Center for Common Ground for Climate Cabinet Education.
Winslow Foundation’s typical grant size sits at $1,000 at the 25th percentile, $8,750 at the median, and $50,000 at the 75th percentile, indicating a structure that includes both smaller awards and a substantial middle tier. The recent record also shows repeated support to the same recipients over multiple years, especially Mothers Out Front Inc, Keep Our Republic Charitable Fund, Stanford University, Marine Conservation Biology Institute, and Royal Roads University. That pattern points to ongoing relationships rather than isolated grants. The foundation is classified as a regular funder, funds organizations rather than individuals, and does not make program-related investments.
$1.9M
$30.4M
$4.2M
$2.5M
Most grants fall between $1K and $50K, with a median of $9K.
25th Percentile
$1K
Median
$9K
75th Percentile
$50K
About 0% of grants go to recipients in CO.
Top 2 recipient countries by grant volume for Winslow Foundation.
| Rank | Country | Grants | Total | Share |
|---|---|---|---|---|
| 1 | United StatesDomestic | 147 | $5.3M | 98.7% |
| 2 | Canada | 2 |
Sign up for a free Kindora account to access AI-generated insights into this funder's giving patterns, decision-makers, and fit signals.
Get Started FreeFree Kindora accounts unlock side-by-side comparisons with foundations that share this funder's focus areas and giving profile.
Get Started FreeSign up free to see how well your nonprofit fits this funder, get an AI-generated pitch, and unlock similar foundations.
Highly concentrated giving: few (7) grants but large dollar amounts, multiple grants to the same grantees, mix of general/unrestricted support for advocacy groups and targeted project funding for academic partners.
Notable grantees: Mothers Out Front, Johns Hopkins University (Planetary Health Alliance), Harvard University (Planetary Health Alliance project), Keep Our Republic Charitable Fund
Winslow Foundation’s giving is national, with 98.7% of grants going to U.S. recipients and 1.3% to Canada. Colorado is the top state by grant count, though the foundation is headquartered in Wilmington, Delaware. Recent recipient locations include Boston, Baltimore, New York, Seattle, Washington, DC, and Santa Fe. Outside the U.S., grants reached Victoria in Canada through Royal Roads University.
Its recent grants show support for planetary health research, climate organizing, climate-health fellowships, conservation biology, and democracy or election-integrity work. Named examples include funding for the Planetary Health Alliance, Climate Health Organizing Fellows, Center for Conservation Biology, and Keep Our Republic Charitable Fund.
Yes. The grant record shows repeated awards to the same recipients across multiple years, including Mothers Out Front Inc, Keep Our Republic Charitable Fund, Marine Conservation Biology Institute, Stanford University, and Royal Roads University.
The foundation’s grant-size distribution is $1,000 at the 25th percentile, $8,750 at the median, and $50,000 at the 75th percentile. Recent grants also show larger institutional awards such as $426,667 to Johns Hopkins University and $175,000 to Keep Our Republic Charitable Fund.
Colorado is the top state by grant count. The broader recipient footprint is national, with grants also going to organizations in Boston, Baltimore, New York, Seattle, Washington, DC, Santa Fe, and Victoria, Canada.
2025
Source: IRS Form 990-PF, fiscal year 2025.
| $220K |
1.3% |
Recipient country reflects the grantee's headquarters per IRS 990-PF and Schedule F filings, not the program's implementation country.
Most recent grants reported to the IRS.
| Recipient | Location | Amount | Year | Purpose |
|---|---|---|---|---|
| MOTHERS OUT FRONT INC | BOSTON, MA | $250,000 | 2025 | General & Unrestricted |
| JOHNS HOPKINS UNIVERSITY | BALTIMORE, MD | $200,000 | 2025 | Planetary Health Alliance |
| KEEP OUR REPUBLIC CHARITABLE FUND | NATL HARBOR, MD | $175,000 | 2025 | General & Unrestricted |
| STANFORD UNIVERSITY | STANFORD, CA | $100,000 | 2025 | Conservation Center for Biology |
| CAMBRIDGE HEALTH ALLIANCE FOUNDATION INC | MALDEN, MA | $100,000 | 2025 | Climate Health Organizing Fellows Program |
| MARINE CONSERVATION BIOLOGY INSTITUTE | SEATTLE, WA | $80,000 | 2025 | General & Unrestricted |
| ROYAL ROADS UNIVERSITY | VICTORIA | $75,000 | 2025 | Cascade Institute |
| GOVERNMENT ACCOUNTABILITY PROJECT INC | WASHINGTON, DC | $50,000 | 2025 | General & Unrestricted |
| CLIMATE CABINET EDUCATION | SAN FRANCISCO, CA | $50,000 | 2025 | General & Unrestricted |
| GLOBAL IMPACT | WASHINGTON, DC | $50,000 | 2025 | Future US |
| SUSTAINABLE MARKETS FOUNDATION | NEW YORK, NY | $50,000 | 2025 | Constitutional Democracy Initiative |
| WILDEARTH GUARDIANS | SANTA FE, NM | $50,000 | 2025 | General & Unrestricted |
| OIL & GAS ACTION NETWORK | OAKLAND, CA | $50,000 | 2025 | Climate Health Now |
| APPALACHIAN VOICES | BOONE, NC | $50,000 | 2025 | General & Unrestricted |
| GREENLIGHT AMERICA | WASHINGTON, DC | $50,000 | 2025 | General & Unrestricted |
| BOARD OF REGENTS OF THE UNIVERSITY OF WISCONSIN SY | MILWAUKEE, WI | $43,000 | 2025 | Pollinator biodiversity and the stability of ecosystem services in a changing climate |
| SAVING NATURE INC | DURHAM, NC | $40,000 | 2025 | General & Unrestricted |
| VIRGINIA ORGANIZING INC | CHARLOTTESVILLE, VA | $40,000 | 2025 | Science Communications Network |
| HACK FOUNDATION | W HOLLYWOOD, CA | $40,000 | 2025 | Campus Climate Network |
| BENNINGTON COLLEGE CORPORATION | BENNINGTON, VT | $40,000 | 2025 | Beyond Plastics |
| ALLIANCE FOR YOUTH ORGANIZING | WASHINGTON, DC | $35,000 | 2025 | General & Unrestricted |
| CLEAN AND PROSPEROUS AMERICA EDUCATION FUND | SEATTLE, WA | $30,000 | 2025 | General & Unrestricted |
| WORKER POWER INSTITUTE | PHOENIX, AZ | $30,000 | 2025 | General & Unrestricted |
| CAROLINA FEDERATION FUND | DURHAM, NC | $30,000 | 2025 | General & Unrestricted |
| SECURE FAMILIES FOUNDATION | WASHINGTON, DC | $30,000 | 2025 | General & Unrestricted |
| FAIR ELECTIONS CENTER | WASHINGTON, DC | $30,000 | 2025 | General & Unrestricted |
| MAKE THE ROAD STATES INC | BROOKLYN, NY | $25,000 | 2025 | Make the Road Nevada |
| VOCES DE LA FRONTERA | MILWAUKEE, WI | $20,000 | 2025 | General & Unrestricted |
| ONEPA ACTIVIST UNITED | PHILADELPHIA, PA | $20,000 | 2025 | General & Unrestricted |
| WESTERN RESOURCE ADVOCATES | BOULDER, CO | $7,000 | 2025 | General & Unrestricted |
| WAY TO RISE | WASHINGTON, DC | $5,000 | 2025 | General & Unrestricted |
| PEOPLE AND POLLINATORS ACTION NETWORK | NIWOT, CO | $3,000 | 2025 | General & Unrestricted |
| HIGH COUNTRY NEWS | PAONIA, CO | $2,000 | 2025 | General & Unrestricted |
| HIGH COUNTRY CONSERVATION ADVOCATES | CRESTED BUTTE, CO | $2,000 | 2025 | General & Unrestricted |
| RAPPAHANNOCK LEAGUE FOR ENVIRONMENTAL PROTECTION I | WASHINGTON, VA | $2,000 | 2025 | General & Unrestricted |
| 350VERMONT | BURLINGTON, VT | $2,000 | 2025 | General & Unrestricted |
| CULTIVANDO | EASTLAKE, CO | $1,500 | 2025 | General & Unrestricted |
| COLORADO PLATEAU FOUNDATION | FLAGSTAFF, AZ | $1,500 | 2025 | General & Unrestricted |
| NEW ERA COLORADO FOUNDATION | DENVER, CO | $1,500 | 2025 | General & Unrestricted |
| HOME ENERGY EFFICIENCY TEAM INC | BOSTON, MA | $1,500 | 2025 | General & Unrestricted |
| WILDAID INC | SAN FRANCISCO, CA | $1,000 | 2025 | General & Unrestricted |
| PLANNED PARENTHOOD FEDERATION OF AMERICA INC | WASHINGTON, DC | $1,000 | 2025 | General & Unrestricted |
| PAJARITO ENVIRONMENTAL EDUCATION CENTER | LOS ALAMOS, NM | $1,000 | 2025 | General & Unrestricted |
| EARTH RESTORATION ALLIANCE | CARBONDALE, CO | $1,000 | 2025 | General & Unrestricted |
| SOUTHWEST ENERGY EFFICIENCY PROJECT LLC | BOULDER, CO | $1,000 | 2025 | General & Unrestricted |
| RESOURCE CENTRAL | BOULDER, CO | $1,000 | 2025 | General & Unrestricted |
| ECOFLIGHT | ASPEN, CO | $1,000 | 2025 | General & Unrestricted |
| GREENLATINOS | BOULDER, CO | $1,000 | 2025 | Colorado focused work |
| COAL CREEK WATERSHED COALITION | CRESTED BUTTE, CO | $1,000 | 2025 | General & Unrestricted |
| COLORADO CHAUTAUQUA ASSOCIATION | BOULDER, CO | $1,000 | 2025 | Garden Maintenance Fund |
JOHNS HOPKINS UNIVERSITY
$200,000Planetary Health Alliance
STANFORD UNIVERSITY
$100,000Conservation Center for Biology
Climate Health Organizing Fellows Program
General & Unrestricted
ROYAL ROADS UNIVERSITY
$75,000Cascade Institute
BOARD OF REGENTS OF THE UNIVERSITY OF WISCONSIN SY
$43,000Pollinator biodiversity and the stability of ecosystem services in a changing climate
SAVING NATURE INC
$40,000General & Unrestricted
BENNINGTON COLLEGE CORPORATION
$40,000Beyond Plastics
SECURE FAMILIES FOUNDATION
$30,000General & Unrestricted
PEOPLE AND POLLINATORS ACTION NETWORK
$3,000General & Unrestricted
HIGH COUNTRY CONSERVATION ADVOCATES
$2,000General & Unrestricted
RAPPAHANNOCK LEAGUE FOR ENVIRONMENTAL PROTECTION I
$2,000General & Unrestricted
350VERMONT
$2,000General & Unrestricted
PLANNED PARENTHOOD FEDERATION OF AMERICA INC
$1,000General & Unrestricted
PAJARITO ENVIRONMENTAL EDUCATION CENTER
$1,000General & Unrestricted
EARTH RESTORATION ALLIANCE
$1,000General & Unrestricted
COAL CREEK WATERSHED COALITION
$1,000General & Unrestricted
COLORADO CHAUTAUQUA ASSOCIATION
$1,000Garden Maintenance Fund