William & Claire Dart Foundation
William & Claire Dart Foundation is a private foundation focused on Philanthropy, based in Mason, MI. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $56.5M in total assets. In 2025, it awarded 3 grants totaling $1.9M. Net investment income was $1.7M.
William & Claire Dart Foundation at a glance
In short: William & Claire Dart Foundation gave $1.9M across 3 grants in 2025 (avg $630K), mostly in Michigan. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $1,890,000
- -51.5% vs 2024
- Grants made (2025)
- 3
- -40.0% vs 2024
- Average grant
- $630,000
- -19.2% vs 2024
- Median grant
- $440,000
- Total assets
- $56,527,324
- +9.3% vs 2024
- Primary geography
- Michigan (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated November 2026.
Who William & Claire Dart Foundation funds
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was Dart Foundation ($1.9M across 3 grants).
Grant Size Distribution
19 grants across all recorded years
The most common grant size was in the $500K–1M range: 7 grants of 19 (37%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 3 itemized grants.
Cities
How William & Claire Dart Foundation gives
- Giving fell 32% from 2022 to 2025. Method
- In 2025 it paid out 46% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
From the foundation's IRS Form 990-PF filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2025, annual grant giving ranged from $1.2M (2020) to $3.9M (2024). In 2025 it made 3 grants totaling $1.9M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Dart Foundation Mason, MI | General Support | $1,200,000 |
| Dart Foundation Mason, MI | General Support | $440,000 |
| Dart Foundation Mason, MI | General Support | $250,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $56,527,324 | $6,746,463 | $1,933,997 | $1,890,000 | 3 | $1,893,997 | $1,738,465 | $4,096,296 |
| 2024 | $51,714,858 | $12,404,368 | $3,948,037 | $3,900,000 | 5 | $3,903,037 | $1,374,368 | $2,821,803 |
| 2023 | $43,258,527 | $5,568,572 | $3,358,195 | $3,350,000 | 6 | $3,358,195 | $568,572 | $1,219,473 |
| 2022 | $21,237,055 | $167,007 | $2,800,391 | $2,800,000 | 2 | $2,800,391 | $456,931 | $1,036,861 |
| 2021 | $23,870,439 | $981,370 | $1,254,437 | $1,225,000 | 3 | — | $132,076 | $1,221,150 |
| 2020 | $24,143,506 | $391,426 | $1,225,267 | $1,225,000 | 2 | — | $391,426 | $1,221,027 |
Under IRS private-foundation payout rules, William & Claire Dart Foundation reported a distributable amount of $4.1M for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
William & Claire Dart Foundation is led by Kenneth B Dart, President since 2024 (on filings since 2020); none of the 2 officers listed in 2025 report compensation.
Officers on the 2025 filing
Kenneth B Dart
President
Director → President & Director, 2023
President & Director → President, 2024
On filings since 2020
No compensation reported
James D Lammers
Vice President, Secretary & Treasurer
Secretary & Director → Vie President, Secretary & Treasurer, 2023
Vie President, Secretary & Treasurer → Vice President, Secretary & Treasurer, 2025
On filings since 2020
No compensation reported
Former officers (3)
- Former: Claire T Dart (2020–2023) — Vice President & Director
- Former: Francis X Liesman II (2020–2023) — Assistant Secretary
- Former: Robert C Dart (2020–2023) — President, Treasurer & Director
Data from IRS Form 990 filings, 2020–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Frequently asked questions about William & Claire Dart Foundation
How much does William & Claire Dart Foundation give each year?
William & Claire Dart Foundation gave $1.9M across 3 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $3.9M across 5 grants.
What is William & Claire Dart Foundation's typical grant size?
William & Claire Dart Foundation's median grant in 2025 was $440,000, and its average grant was $630,000, across 3 grants on its 2025 IRS Form 990-PF.
Where does William & Claire Dart Foundation give grants?
William & Claire Dart Foundation gives mostly in Michigan: 100% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The most frequent recipient cities were Mason, MI (3 grants).
Does William & Claire Dart Foundation give general operating support?
Yes: 100% of William & Claire Dart Foundation's 2025 grants with a stated purpose (3 of 3) were for general or operating support, per its 2025 IRS Form 990-PF.
How large is William & Claire Dart Foundation?
William & Claire Dart Foundation reported $56.5M in total assets on its 2025 IRS Form 990-PF. It paid out $1.9M in qualifying distributions that year, against a required minimum of $4.1M (roughly 5% of its investment assets). Falling short in one year is not a violation: foundations have until the end of the next year to meet the minimum.
What is William & Claire Dart Foundation?
William & Claire Dart Foundation is a private foundation focused on Philanthropy, based in Mason, MI. It holds $56.5M in total assets as of 2025.
What is William & Claire Dart Foundation's EIN?
William & Claire Dart Foundation's EIN (Employer Identification Number) is 38-2562664. IRS Form 990 filing data is available on this page for 2020–2025.
Data last updated November 2026. Sourced from IRS Form 990-PF filings.
Data update history
(2)
When this profile's IRS filing data changed on Grantable
- Added Form 990-PF for fiscal year 2025 (received by the IRS September 8, 2026)
- IRS filings on file for fiscal years 2020–2024
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