The Thorne Cox Family Foundation is a private foundation based in Boston, Massachusetts, designated as a 501(c)(3) organization. The foundation has been tax-exempt since August 2014 and operates as a grantmaking foundation focused on philanthropic activities.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$4.3M
+7.5% YoY
Annual Giving
$572K
-21.3% YoY
Grant Count
19
-9.5% YoY
Avg Grant Size
$30K
-13.0% YoY
Mission & Focus Areas
The foundation's primary funding focus areas include:
- Education
- Philanthropy, Voluntarism & Grantmaking
- Human Services
- Historic Buildings Preservation
- Historic Preservation
- Arts
Grantmaking
The foundation actively distributes grants across its focus areas, with recent grantmaking activity documented in 2024.
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Geographic Focus
Where this funder awards grants
The foundation primarily directs its grantmaking toward organizations in:
- Maine
- Massachusetts
- Colorado
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
As of Fiscal Year Ending December 2024:
| Metric | Amount |
|---|---|
| Total Assets | $4,293,422 |
| Total Revenue | $572,654 |
| Total Expenses | $655,528 |
| Net Income | -$82,874 |
| Total Liabilities | $0 |
The foundation's expenses exceeded revenues in 2024, resulting in a net loss of $82,874.
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $4,293,422 | $3,992,700 | $3,900,526 |
| Revenue | $572,654 | $877,368 | $841,839 |
| Expenses | $655,528 | $786,791 | $990,325 |
| Qualifying Distributions | $572,414 | $728,835 | $920,626 |
| Net Investment Income | $868,835 | $731,460 | $313,723 |
| Distributable Amount | $295,295 | $234,876 | $169,281 |
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
95 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 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| Brinkley Thorne | President | 1 | — |
| Mazie L Cox | Vice President | 1 | — |
| Yarrow Thorne | Secretary | 1 | — |
| Dune Thorne | Treasurer | 1 | — |
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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