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
Under IRS private-foundation payout rules, Bonsen Foundation reported a distributable amount of $239K for 2024 — the minimum it must pay out in qualifying distributions.
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
Among its reported 2024 grants, the largest include Massachusetts Institute of Technolo ($330,000).
| Recipient | Purpose | Amount |
|---|---|---|
| MASSACHUSETTS INSTITUTE OF TECHNOLO CAMBRIDGE, MA | TO FURTHER DONEE ORGANIZATION'S EXEMPT PURPOSE | $330,000 |
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
Frequently Asked Questions
What is Bonsen Foundation?
Bonsen Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in CAMBRIDGE, MA. It holds $4.5M in total assets as of 2024.
How large is Bonsen Foundation?
As of 2024, Bonsen Foundation holds $4.5M in total assets with $116K in annual revenue. It awarded 1 grants totaling $330K in 2024.
Where does Bonsen Foundation operate?
Bonsen Foundation has awarded grants in Massachusetts, New York.
What size grants does Bonsen Foundation award?
In 2024, Bonsen Foundation awarded 1 grants totaling $330K — an average of about $330K per grant, based on its IRS Form 990 filings.
How much is Bonsen Foundation required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2024, Bonsen Foundation reported a distributable amount of $239K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is Bonsen Foundation's EIN?
Bonsen Foundation's EIN (Employer Identification Number) is 82-4380106. IRS Form 990 filing data is available on this page for 2020–2024.
Explore Open Grants
Browse active grant opportunities in Bonsen Foundation's focus areas in our free grants database
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Data last updated April 2026. Sourced from IRS Form 990-PF filings.
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