Winslow Foundation
Invitation OnlyWilmington, Delaware · EIN 22-2778703 · Private foundation
Grants paid (2024)$1.9M
Organizations funded57
Typical grant$20,000
Total assets$43.9M
Half of its grants to organizations were between $1,000 and $50,000.
From the return
How to apply
On its return for tax year 2024 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
100% of grants went outside Delaware.
Grants paid in tax year 2024
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Mothers Out Front Inc | Boston, MA | General & Unrestricted | $250,000 |
| Johns Hopkins University | Baltimore, MD | Planetary Health Alliance | $200,000 |
| Keep Our Republic Charitable Fund | Natl Harbor, MD | General & Unrestricted | $175,000 |
| Cambridge Health Alliance Foundation Inc | Malden, MA | Climate Health Organizing Fellows Program | $100,000 |
| Stanford University | Stanford, CA | Conservation Center for Biology | $100,000 |
| Marine Conservation Biology Institute | Seattle, WA | General & Unrestricted | $80,000 |
| Royal Roads University | Victoria, CA | Cascade Institute | $75,000 |
| Appalachian Voices | Boone, NC | General & Unrestricted | $50,000 |
| Climate Cabinet Education | San Francisco, CA | General & Unrestricted | $50,000 |
| Global Impact | Washington, DC | Future US | $50,000 |
| Government Accountability Project Inc | Washington, DC | General & Unrestricted | $50,000 |
| Greenlight America | Washington, DC | General & Unrestricted | $50,000 |
| Oil & Gas Action Network | Oakland, CA | Climate Health Now | $50,000 |
| Sustainable Markets Foundation | New York, NY | Constitutional Democracy Initiative | $50,000 |
| Wildearth Guardians | Santa Fe, NM | General & Unrestricted | $50,000 |
| Board of Regents of the University of Wisconsin Sy | Milwaukee, WI | Pollinator biodiversity and the stability of ecosystem services in a changing climate | $43,000 |
| Bennington College Corporation | Bennington, VT | Beyond Plastics | $40,000 |
| Hack Foundation | W Hollywood, CA | Campus Climate Network | $40,000 |
| Saving Nature Inc | Durham, NC | General & Unrestricted | $40,000 |
| Virginia Organizing Inc | Charlottesville, VA | Science Communications Network | $40,000 |
| Alliance for Youth Organizing | Washington, DC | General & Unrestricted | $35,000 |
| Carolina Federation Fund | Durham, NC | General & Unrestricted | $30,000 |
| Clean and Prosperous America Education Fund | Seattle, WA | General & Unrestricted | $30,000 |
| Fair Elections Center | Washington, DC | General & Unrestricted | $30,000 |
| Secure Families Foundation | Washington, DC | General & Unrestricted | $30,000 |
| Worker Power Institute | Phoenix, AZ | General & Unrestricted | $30,000 |
| Make the Road States Inc | Brooklyn, NY | Make the Road Nevada | $25,000 |
| Onepa Activist United | Philadelphia, PA | General & Unrestricted | $20,000 |
| Voces de LA Frontera | Milwaukee, WI | General & Unrestricted | $20,000 |
| Western Resource Advocates | Boulder, CO | General & Unrestricted | $7,000 |
| Way to Rise | Washington, DC | General & Unrestricted | $5,000 |
| People and Pollinators Action Network | Niwot, CO | General & Unrestricted | $3,000 |
| 350Vermont | Burlington, VT | General & Unrestricted | $2,000 |
| High Country Conservation Advocates | Crested Butte, CO | General & Unrestricted | $2,000 |
| High Country News | Paonia, CO | General & Unrestricted | $2,000 |
| Rappahannock League for Environmental Protection I | Washington, VA | General & Unrestricted | $2,000 |
| Colorado Plateau Foundation | Flagstaff, AZ | General & Unrestricted | $1,500 |
| Cultivando | Eastlake, CO | General & Unrestricted | $1,500 |
| Home Energy Efficiency Team Inc | Boston, MA | General & Unrestricted | $1,500 |
| New Era Colorado Foundation | Denver, CO | General & Unrestricted | $1,500 |
| 350 Colorado | Boulder, CO | General & Unrestricted | $1,000 |
| Center for Biological Diversity Inc | Tucson, AZ | General & Unrestricted | $1,000 |
| Coal Creek Watershed Coalition | Crested Butte, CO | General & Unrestricted | $1,000 |
| Colorado Chautauqua Association | Boulder, CO | Garden Maintenance Fund | $1,000 |
| Colorado Organization for Latina Opportunity and R | Denver, CO | General & Unrestricted | $1,000 |
| Conservation Colorado Education Fund | Denver, CO | General & Unrestricted | $1,000 |
| Earth Restoration Alliance | Carbondale, CO | General & Unrestricted | $1,000 |
| Ecoflight | Aspen, CO | General & Unrestricted | $1,000 |
| Environmental Health Sciences | Bozeman, MT | Environmental Health News | $1,000 |
| Greenlatinos | Boulder, CO | Colorado focused work | $1,000 |
| Pajarito Environmental Education Center | Los Alamos, NM | General & Unrestricted | $1,000 |
| Planned Parenthood Federation of America Inc | Washington, DC | General & Unrestricted | $1,000 |
| Resource Central | Boulder, CO | General & Unrestricted | $1,000 |
| Southwest Energy Efficiency Project LLC | Boulder, CO | General & Unrestricted | $1,000 |
| Wildaid Inc | San Francisco, CA | General & Unrestricted | $1,000 |
| Colorado Chautauqua Association | Boulder, CO | General & Unrestricted | $500 |
| Colorado Sun | Denver, CO | General & Unrestricted | $500 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2024 | $1,878,000 | 57 |
| 2023 | $1,883,999 | 46 |
Sources
- IRS Form 990-PF, tax year 2024, filed Oct 9, 2025 - IRS e-file batch, object ID 202502829349100015
- IRS Tax Exempt Organization Search for EIN 22-2778703
- Profile updated Nov 5, 2026
Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.