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
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
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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
No grants recorded for .
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
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Data last updated April 2026. Sourced from IRS Form 990-PF filings. Research dossier generated April 2026.
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