Winslow Foundation
The Winslow Foundation is a private, independent foundation established in 1987 in New Jersey and currently based in Wilmington, Delaware. The foundation operates as a 501(c)(3) private grantmaking foundation focused on supporting environmental and social science initiatives across the United States.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$30.4M
+6.3% YoY
Annual Giving
$1.9M
-0.3% YoY
Grant Count
57
+23.9% YoY
Avg Grant Size
$33K
-19.6% YoY
Under IRS private-foundation payout rules, Winslow Foundation reported a distributable amount of $2.1M for 2024 — the minimum it must pay out in qualifying distributions.
Mission & Focus Areas
The foundation's mission centers on giving primarily for the environment and population studies. Its funding priorities include:
- Environment
- Natural resources
- Social sciences
- Population studies
- Science education
Grantmaking
The foundation appears to be open to new applicants, though specific application procedures are not detailed in available sources.
Grant Range
$4,000
Average Grant
amount: $173
Ready to take the next step with Winslow Foundation?
Geographic Focus
Where this funder awards grants
The foundation supports projects across numerous U.S. states and cities, including:
Arizona, California, Colorado, District of Columbia, Maryland, Michigan, Montana, North Carolina, New Jersey, New Mexico, New York, Pennsylvania, Puerto Rico, Utah, Vermont, Virginia, Washington, and Wisconsin.
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
Assets:
- $28.6 million to $41 million (figures vary by source and filing year)
Annual Activity (2023):
- Total assets: $28,584,085
- Total revenues: $1,341,160
- Total expenses: $2,409,633
- Total distributions: $1.9 million to $2.1 million
Investment Income:
- Investment income and dividends: $306,284 (2023)
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $30,381,441 | $28,584,085 | $29,425,846 |
| Revenue | $4,249,645 | $1,341,160 | $1,187,802 |
| Expenses | $2,452,289 | $2,409,633 | $2,309,515 |
| Qualifying Distributions | $2,093,614 | $2,085,923 | $1,967,619 |
| Net Investment Income | $3,896,142 | $1,057,258 | $870,026 |
| Distributable Amount | $2,099,041 | $2,181,160 | $1,817,387 |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2024
Grant Size Distribution
242 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2024 grants, the largest include Mothers Out Front Inc ($250,000), Johns Hopkins University ($200,000), Keep Our Republic Charitable Fund ($175,000).
| Recipient | Purpose | Amount |
|---|---|---|
| 350 COLORADO BOULDER, CO | General & Unrestricted | $1,000 |
| 350VERMONT BURLINGTON, VT | General & Unrestricted | $2,000 |
| ALLIANCE FOR YOUTH ORGANIZING WASHINGTON, DC | General & Unrestricted | $35,000 |
| APPALACHIAN VOICES BOONE, NC | General & Unrestricted | $50,000 |
| BENNINGTON COLLEGE CORPORATION BENNINGTON, VT | Beyond Plastics | $40,000 |
| 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 |
| CAMBRIDGE HEALTH ALLIANCE FOUNDATION INC MALDEN, MA | Climate Health Organizing Fellows Program | $100,000 |
| CAROLINA FEDERATION FUND DURHAM, NC | General & Unrestricted | $30,000 |
| CENTER FOR BIOLOGICAL DIVERSITY INC TUCSON, AZ | General & Unrestricted | $1,000 |
| CLEAN AND PROSPEROUS AMERICA EDUCATION FUND SEATTLE, WA | General & Unrestricted | $30,000 |
Leadership & Key People
Leadership team and compensation from IRS filings
- Kelsey Wirth – President and Trustee
- Morgan McMillan – Secretary and Executive Director (compensation: $118,000)
- Christopher Wirth – Vice President, Trustee, and Treasurer
- Wren W Wirth – Trustee
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| Morgan McMillan | Sec, executive dir | 40 | $118,000 |
| Christopher Wirth | VP, Trustee, Treas | 1 | — |
| Kelsey Wirth | Trustee, Pres | 4 | — |
| Wren W Wirth | Trustee | 1 | — |
Contact Information
Address: 501 Silverside Road, Wilmington, DE 19809-1377
Telephone: 800-839-1754
EIN: 22-2778703
Subject Areas
Focus areas based on grantmaking activity
Frequently Asked Questions
What does Winslow Foundation fund?
The foundation's mission centers on giving primarily for the environment and population studies. Its funding priorities include: • Environment • Natural resources • Social sciences • Population studies • Science education
How do I apply for a grant from Winslow Foundation?
**Grant Activity:** • The foundation made 40-46 grants in recent fiscal years • Total annual distributions: approximately $1.9 million to $2.1 million • Median grant size: $4,000 • Grant range: $500 to $427,667 • Average grant amount: $173 **Recent Notable Grants (2023):** • Johns Hopkins University (Planetary Health Alliance): $426,667 • Mothers Out Front: $250,000 • Keep Our Republic Charitable Fund: $150,000 The foundation appears to be open to new applicants, though specific application pro…
Where does Winslow Foundation make grants?
The foundation supports projects across numerous U.S. states and cities, including: Arizona, California, Colorado, District of Columbia, Maryland, Michigan, Montana, North Carolina, New Jersey, New Mexico, New York, Pennsylvania, Puerto Rico, Utah, Vermont, Virginia, Washington, and Wisconsin.
What size grants does Winslow Foundation award?
In 2024, Winslow Foundation awarded 57 grants totaling $1.9M — an average of about $33K per grant, based on its IRS Form 990 filings.
How much is Winslow Foundation required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2024, Winslow Foundation reported a distributable amount of $2.1M on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is Winslow Foundation's EIN?
Winslow Foundation's EIN (Employer Identification Number) is 22-2778703. IRS Form 990 filing data is available on this page for 2020–2024.
Explore Open Grants
Browse active grant opportunities in Winslow Foundation's focus areas in our free grants database
Related Funders
Similar funders by location and focus area
Ttee Trustees of Univ of Mass - Art 5
WILMINGTON, DE
Assets
$380K
Grants
1
Total Given
$14K
The Jonsson Foundation
WILMINGTON, DE
Assets
$784K
Grants
3
Total Given
$15K
The Cucci Family Foundation
WILMINGTON, DE
Assets
$579K
Grants
4
Total Given
$45K
Westly Foundation
WILMINGTON, DE
Assets
$4.1M
Grants
55
Total Given
$1.2M
Scott and Jessica McClintock Foundation
WILMINGTON, DE
Assets
$8.9M
Grants
22
Total Given
$392K
The John C Griswold Family Foundation
WILMINGTON, DE
Assets
$13.4M
Grants
68
Total Given
$534K
Data last updated June 2026. Sourced from IRS Form 990-PF filings. Research dossier generated April 2026.
What could you do with Winslow Foundation on Grantable?
- Assess strategic fit with your organization
- Draft a tailored letter of inquiry
- Find open RFPs from this funder
- Monitor for new funding opportunities
Go from researching Winslow Foundation to a real strategy.