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Form 990-PFTax year 2025EIN 36-4055957

MacLean Foundation

A private foundation in Mundelein, IL. Its return for tax year 2025 lists 4 grants and $4 million paid in grants.

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Tax year 2025 (period ending Dec 31, 2025), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

How to apply

Preselected only

The return checks the box saying the foundation gives only to preselected organizations and does not accept unsolicited requests.

Assets and giving by year

8 returns on file
Grants paid by tax year. The latest year is in blue.

  • Tax year 2025

    $4,048,263

    Grants listed
    4
    Assets, end of year
    $16,212,540

  • Tax year 2024

    $4,048,263

    Grants listed
    4
    Assets, end of year
    $19,322,781

  • Tax year 2023

    $6,259,693

    Grants listed
    7
    Assets, end of year
    $22,357,609

  • Tax year 2022

    $10,580,000

    Grants listed
    6
    Assets, end of year
    $27,456,932

  • Tax year 2021

    $20,000

    Grants listed
    1
    Assets, end of year
    $19,561

  • Tax year 2020

    $20,000

    Grants listed
    1
    Assets, end of year
    $63,822

  • Tax year 2019

    $65,000

    Grants listed
    2
    Assets, end of year
    $82,389

  • Tax year 2018

    $420,300

    Grants listed
    12
    Assets, end of year
    $139,819

Grants paid in 2025

4 grants, largest first

As listed on the return.

  1. University of ChicagoChicago, IL

    Donation to Philanthropy, Voluntarism and Grantmaking

    $1,748,263
  2. Dartmouth CollegeHanover, NH

    Thayer Expansion Commitment

    $1,500,000
  3. Museum of Science and IndustryChicago, 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
  4. Ruffed Grouse SocietyPittsburgh, PA

    Improve wildlife habitat and forest health for ruffed grouse, American woodcock and ALL forest wildlife.

    $50,000

Where the money goes

By cause: grants to organizations we matched to the IRS list of exempt organizations, by their category.

  1. Education2 grants $3,248,26381% of the total
  2. Arts and culture1 grant $750,00019% of the total

By State

Grants to organizations with a US address, latest year.

  1. Illinois2 grants $2,498,263
  2. New Hampshire1 grant $1,500,000
  3. Pennsylvania1 grant $50,000

Officers, directors and trustees

4 people as filed

As filed on the return, with average hours per week and pay from the foundation.

  • Adrian JayPresident Hours 0Pay $0
  • Brooke MacLeanVice President Hours 0Pay $0
  • Gillian GrowdonSecretary Hours 0Pay $0
  • Toby BonaguroASST. SECY Hours 0Pay $0

The return

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