Astor Street Foundation Inc
Astor Street Foundation Inc is a private philanthropic foundation based in Milwaukee, Wisconsin. Established in 1990, the organization operates as a 501(c)(3) grantmaking foundation with a volunteer leadership structure.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
—
Annual Giving
$513K
+15.3% YoY
Grant Count
45
-4.3% YoY
Avg Grant Size
$11K
+20.4% YoY
Mission & Focus Areas
The foundation focuses on philanthropy and foundations as primary areas of support. Grant-making priorities include Education, Philanthropy, Voluntarism & Grantmaking, and Human Services.
Grantmaking
The foundation awarded approximately $445,000 in grants during the most recent fiscal year, with an average grant size of approximately $40 across a high volume of grants.
Grant Range
$5,000
Average Grant
of approximately $40 across a high volume of grants.
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Geographic Focus
Where this funder awards grants
The foundation provides funding across multiple U.S. states, with particular focus on:
- Wisconsin
- Maine
- Massachusetts
- New York
- Illinois
- California
- Georgia
- Maryland
Primary funding cities include Milwaukee, New York, and Chicago.
Grant Distribution by State
Cities
Financial History
Multi-year comparison from IRS filings
Assets & Revenue (2023):
- Total assets: $2,308,661
- Annual revenue: $373,739
- Annual expenses: $466,910
- Total liabilities: $0
Asset Growth: Assets increased 2.6% from the previous year.
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | — | — | — |
| Revenue | — | — | — |
| Expenses | — | — | — |
| Qualifying Distributions | — | — | — |
| Net Investment Income | — | — | — |
| Distributable Amount | — | — | — |
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
206 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
The foundation is led by a volunteer team:
- Sarah O Zimmerman – President and Treasurer
- Lynde B Uihlein – Vice President
- John U Olson – Secretary
All leadership positions are held on a voluntary basis without compensation.
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| Lynde B Uihlein | Vice President | 1 | — |
| John U Olson | Secretary | 1 | — |
| Sarah O Zimmerman | President&Treas | 2 | — |
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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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