Maclean Foundation
Maclean Foundation is a private foundation, based in Mundelein, IL. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $16.2M in total assets. In 2025, it awarded 4 grants totaling $4.0M. Net investment income was $796K.
Maclean Foundation at a glance
In short: Maclean Foundation gave $4.0M across 4 grants in 2025 (avg $1.0M), mostly in Illinois. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $4,048,263
- +0.0% vs 2024
- Grants made (2025)
- 4
- +0.0% vs 2024
- Average grant
- $1,012,066
- +0.0% vs 2024
- Median grant
- $1,125,000
- Total assets
- $16,212,540
- -16.1% vs 2024
- Primary geography
- Illinois (62% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
Who Maclean Foundation funds
How this funder distributes its grants
Top Recipients
Top 4 recipients in 2025
The largest 2025 recipient was University of Chicago ($1.7M). Together the top 4 received $4.0M.
Grant Size Distribution
22 grants across all recorded years
The most common grant size was in the $1–5M range: 8 grants of 22 (36%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 4 itemized grants.
Cities
How Maclean Foundation gives
- Giving fell 62% from 2022 to 2025. Method
- In 2023 it paid out well above its IRS minimum distribution (the 5% rule). 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 2019 to 2025, annual grant giving ranged from $20K (2020) to $10.6M (2022). In 2025 it made 4 grants totaling $4.0M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| University of Chicago Chicago, IL | Donation to Philanthropy, Voluntarism and Grantmaking | $1,748,263 |
| Dartmouth College Hanover, NH | Thayer Expansion Commitment | $1,500,000 |
| Museum of Science and Industry Chicago, IL | Build public understanding of science, show how science impacts our society and inspire everyone to think critically about the world around us. | $750,000 |
| Ruffed Grouse Society Pittsburgh, PA | Improve wildlife habitat and forest health for ruffed grouse, American woodcock and ALL forest wildlife. | $50,000 |
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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 | $16,212,540 | $830,607 | $4,105,065 | $4,048,263 | 4 | $4,069,995 | $795,537 | — |
| 2024 | $19,322,781 | $1,023,152 | $4,128,069 | $4,048,263 | 4 | $4,080,665 | $975,748 | — |
| 2023 | $22,357,609 | $1,014,068 | $6,309,880 | $6,259,693 | 7 | $6,284,786 | $988,974 | $475,401 |
| 2022 | $27,456,932 | $38,021,031 | $10,583,356 | $10,580,000 | 6 | $10,581,677 | $20,301 | $212,912 |
| 2021 | $19,561 | $975 | $24,611 | $20,000 | 1 | $22,305 | — | $2,115 |
| 2020 | $63,822 | $2,373 | $25,345 | $20,000 | 1 | — | — | $3,702 |
| 2019 | $82,389 | $24,758 | $72,487 | $65,000 | 2 | — | $21,015 | $5,880 |
Leadership & Key People
Officers and directors from IRS filings
Maclean Foundation is led by Adrian Jay, President on every filing since 2019; none of the 4 officers listed in 2025 report compensation.
Officers on the 2025 filing
Adrian Jay
President
On filings since 2019
No compensation reported
Brooke MacLean
Vice President
On filings since 2019
No compensation reported
Gillian Growdon
Secretary
On filings since 2019
No compensation reported
Toby Bonaguro
Assistant Secretary
On filings since 2019
No compensation reported
Data from IRS Form 990 filings, 2019–2025. "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 Maclean Foundation
How much does Maclean Foundation give each year?
Maclean Foundation gave $4.0M across 4 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $4.0M across 4 grants.
What is Maclean Foundation's typical grant size?
Maclean Foundation's median grant in 2025 was $1,125,000, and its average grant was $1,012,066, across 4 grants on its 2025 IRS Form 990-PF.
Where does Maclean Foundation give grants?
Maclean Foundation gives mostly in Illinois: 62% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest state was New Hampshire (37%). The most frequent recipient cities were Chicago, IL (2 grants).
Does Maclean Foundation give general operating support?
Not in 2025: none of the 4 grants with a stated purpose on Maclean Foundation's 2025 IRS Form 990-PF were described as general or operating support.
How large is Maclean Foundation?
Maclean Foundation reported $16.2M in total assets on its 2025 IRS Form 990-PF. Its revenue that year was $831K.
What is Maclean Foundation's EIN?
Maclean Foundation's EIN (Employer Identification Number) is 36-4055957. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS August 13, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS June 11, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS May 12, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS July 10, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS July 30, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS May 15, 2025)
- Added Form 990-PF for fiscal year 2025 (received by the IRS August 17, 2026)
- IRS filings on file for fiscal years 2019–2024
Live grants for the work Maclean Foundation funds
Philanthropy, Voluntarism & Grantmaking Open opportunities, soonest deadline first.
- Nixa Affiliate Grantmaking Program Up to US $10,000 · Due October 19, 2026
- Community and School Grants $28,000 total pool; 10-15 grants expected · Due October 19, 2026
- Mary Pinola/Crescenta Valley Chamber Education Fund $500 - $5,000 for ongoing programs; up to $15,000 for Strategic Initiative Grants · Due October 19, 2026
Explore Open Grants
Browse active grant opportunities in Maclean Foundation's focus areas in our free grants database
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