The Thomas G Stemberg Charitable Foundation is a private foundation established in 2006 and based in Boston, Massachusetts. The foundation operates as a grantmaking organization focused on supporting charitable purposes across multiple sectors.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$6.5M
+1.1% YoY
Annual Giving
$443K
+13.2% YoY
Grant Count
23
-4.2% YoY
Avg Grant Size
$19K
+18.1% YoY
Mission & Focus Areas
The foundation supports general charitable purposes with primary funding interests in:
- Education
- Science and STEM education
- Health care
- Philanthropy, voluntarism, and grantmaking
The foundation's giving extends primarily across Massachusetts, New York, and Michigan.
Grantmaking
The foundation made 23 grants in 2023, with total giving of $442,500. Recent notable grants include:
Grant Range
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Geographic Focus
Where this funder awards grants
The foundation primarily funds organizations in Massachusetts, New York, and Michigan.
Grant Distribution by State
Cities
Financial History
Multi-year comparison from IRS filings
As of December 2023:
- Total assets: $6,390,591
- Total revenues: $226,550
- Total expenses: $458,748
- Number of employees: 0
As of 2024:
- Total assets: $6,458,555
- Total giving: $442,500
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $6,458,555 | $6,390,591 | $6,622,789 |
| Revenue | $569,748 | $226,550 | $482,998 |
| Expenses | $501,784 | $458,748 | $716,294 |
| Qualifying Distributions | $442,596 | $397,857 | $557,759 |
| Net Investment Income | $511,212 | $166,080 | $422,700 |
| Distributable Amount | $404,904 | $372,339 | $408,397 |
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
121 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
Contact information is maintained through BBH (Brown Brothers Harriman), with Noreen Snow listed as a contact person. The foundation's telephone number is 617-772-1385.
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| KATHERINE CHAPMAN STEMBERG | TRUSTEE AS REQUIRED | — | — |
Subject Areas
Focus areas based on grantmaking activity
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Similar funders by location and focus area
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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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