Bonsen Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in CAMBRIDGE, MA. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $4.5M in total assets. In 2024, it awarded 1 grants totaling $330K. Net investment income was $36K.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$4.5M
-5.8% YoY
Annual Giving
$330K
+32.0% YoY
Grant Count
1
+0.0% YoY
Avg Grant Size
$330K
+32.0% YoY
About Bonsen Foundation
Based on IRS filings
Bonsen Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in CAMBRIDGE, MA. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $4.5M in total assets. In 2024, it awarded 1 grants totaling $330K. Net investment income was $36K.
Focus Areas
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $4,472,895 | $4,746,096 | $5,020,374 |
| Revenue | $115,706 | $117,152 | $83,903 |
| Expenses | $410,201 | $267,624 | $634,711 |
| Qualifying Distributions | $330,000 | $250,000 | $600,000 |
| Net Investment Income | $35,505 | $99,528 | $49,192 |
| Distributable Amount | $238,834 | $238,085 | $265,953 |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 1 recipients in 2024
Grant Size Distribution
6 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 |
|---|---|---|---|
| JOOST P BONSEN | President | 10 | — |
Subject Areas
Focus areas based on grantmaking activity
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Data last updated April 2026. Sourced from IRS Form 990-PF filings.
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