The Mill Spring Foundation 084206-000
The Mill Spring Foundation is a private foundation based in Wilmington, Delaware, established in 1953. The foundation operates with no employees and focuses on general charitable causes through grant-making activities.
Financial Overview
From 2025 IRS Form 990-PF · View filing
Total Assets
$2.3M
+7.3% YoY
Annual Giving
$653K
-23.7% YoY
Grant Count
22
-8.3% YoY
Avg Grant Size
$30K
-16.8% YoY
Mission & Focus Areas
The foundation's primary funding areas include:
- Education
- Science and STEM education
- Philanthropy, voluntarism, and grantmaking
- Human services
The foundation has demonstrated particular interest in supporting educational institutions and science-focused organizations.
Grantmaking
The foundation made 17 grants in the most recent fiscal year (ending June 2025), totaling $653,000 in giving. Recent notable grants include:
Grant Range
s:**
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Geographic Focus
Where this funder awards grants
The foundation primarily funds organizations in Pennsylvania and Virginia.
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
As of Fiscal Year Ending June 2025:
- Total Assets: $2,338,451
- Total Revenues: $819,584
- Total Expenses: $684,323
- Investment Income and Dividends: $78,317
Prior Year (FY 2024):
- Investment Income and Dividends: $94,528
The foundation's revenue is primarily generated through investment income, with a 17.1% decline in investment income from the prior year.
| Metric | 2025 | 2024 | 2023 |
|---|---|---|---|
| Total Assets | $2,338,451 | $2,179,742 | $2,156,506 |
| Revenue | $819,584 | $904,770 | $589,558 |
| Expenses | $684,323 | $881,508 | $1,136,421 |
| Qualifying Distributions | $653,000 | $856,000 | $1,114,500 |
| Net Investment Income | $802,316 | $881,949 | $572,067 |
| Distributable Amount | $224,337 | $203,738 | $211,055 |
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 2025
Grant Size Distribution
96 grants across all recorded years
Giving History
Grant recipients and amounts by year
No grants recorded for .
Leadership & Key People
Officers and directors from IRS filings
Compensation Overview
From 2025 IRS filing
From 2025 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| WILLIAM F MACDONALD JR | TRUSTEE | 1 | — |
| LESLIE MACDONALD | TRUSTEE | 1 | — |
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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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