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Form 990-PFTax year 2025EIN 36-3152531

The Regenstein Foundation

A private foundation in Chicago, IL. Its return for tax year 2025 lists 29 grants and $6.8 million paid in grants.

See which foundations fund work like yours Matching by cause, place and grant size

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

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

  • Tax year 2025

    $6,750,000

    Grants listed
    29
    Assets, end of year
    $77,465,011

  • Tax year 2024

    $4,545,000

    Grants listed
    34
    Assets, end of year
    $74,826,234

  • Tax year 2023

    $7,055,000

    Grants listed
    32
    Assets, end of year
    $73,262,797

  • Tax year 2022

    $3,253,750

    Grants listed
    28
    Assets, end of year
    $70,313,196

  • Tax year 2021

    $11,363,750

    Grants listed
    26
    Assets, end of year
    $85,802,717

  • Tax year 2020

    $5,534,500

    Grants listed
    33
    Assets, end of year
    $87,930,025

Grants paid in 2025

29 grants, largest first

As listed on the return.

  1. Shedd AquariumChicago, IL

    Operational support

    $1,750,000
  2. Ann & Robert H Lurie Children's HospitalChicago, IL

    Operational support

    $1,060,000
  3. Shirley Ryan Ability LabChicago, IL

    Operational support

    $1,055,000
  4. Rush University Medical CenterChicago, IL

    Operational support

    $1,020,000
  5. Chicago Botanic GardenGlencoe, IL

    Operational support

    $550,000
  6. Lincoln Park ZooChicago, IL

    Operational support

    $240,000
  7. Gulfshore PlayhouseNaples, FL

    Operational support

    $225,000
  8. Northwestern Memorial FoundationChicago, IL

    Operational support

    $150,000
  9. Field MuseumChicago, IL

    Operational support

    $100,000
  10. Naples Community HospitalNaples, FL

    Operational support

    $100,000
  11. Chicago Zoological SocietyBrookfield, IL

    Operational support

    $90,000
  12. Naples ZooNaples, FL

    Operational support

    $90,000
  13. Lumen Christi InstituteChicago, IL

    Operational support

    $55,000
  14. American Red CrossWashington, DC

    Operational support

    $50,000
  15. Chicago Symphony OrchestraChicago, IL

    Operational support

    $50,000
  16. Art Institue of ChicagoChicago, IL

    Operational support

    $25,000
  17. Greater Chicago Food DepositoryChicago, IL

    Operational support

    $25,000
  18. Artis - NaplesNaples, FL

    Operational support

    $25,000
  19. Parliament of World's ReligionsChicago, IL

    Operational support

    $15,000
  20. University of IllinoisChicago, IL

    Operational support

    $15,000
  21. Conservancy of Southwest FloridaNaples, FL

    Operational support

    $10,000
  22. The Service Club of ChicagoChicago, IL

    Operational support

    $10,000
  23. The WasteshedChicago, IL

    Operational support

    $10,000
  24. Children of Abraham CoalitionNorthbrook, IL

    Operational support

    $5,000
  25. Holocaust Museum of SouthwestNaples, FL

    Operational support

    $5,000
  26. Katz Rheumatology Research Educaion FundAtlanta, GA

    Operational support

    $5,000
  27. Millennium Park FoundationChicago, IL

    Operational support

    $5,000
  28. Naples Botanical GardenNaples, FL

    Operational support

    $5,000
  29. Serbs for SerbsPrairie View, IL

    Operational support

    $5,000

Approved for future payment

3 grants

Approved in 2025 and not yet paid.

  1. Lincoln Park ZooChicago, IL

    Operational support

    $10,000,000
  2. Smithsonian National ZoologicalWashington, DC

    Operational support

    $70,000
  3. For Autistic Kids FoundationGlenview, IL

    Operational support

    $10,000

Where the money goes

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

  1. Health2 grants $1,120,00034% of the total
  2. Mutual benefit1 grant $1,060,00032% of the total
  3. Environment2 grants $555,00017% of the total
  4. Arts and culture3 grants $300,0009% of the total
  5. Animals2 grants $180,0005% of the total
  6. Human services1 grant $50,0002% of the total
  7. 4 other causes4 grants $45,0001% of the total

By State

Grants to organizations with a US address, latest year.

  1. Illinois20 grants $6,235,000
  2. Florida7 grants $460,000
  3. District of Columbia1 grant $50,000
  4. Georgia1 grant $5,000

Officers, directors and trustees

5 people as filed

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

  • Susan RegensteinCHAIRMAN & PRESIDENT Hours 10Pay $0
  • Joseph Regenstein IIISECRETARY/TREASURER Hours 5Pay $0
  • Marshall Field VDIRECTOR Hours 5Pay $0
  • F Oliver Nicklin JrDIRECTOR Hours 5Pay $0
  • Patricia WalliesEXECUTIVE DIRECTOR Hours 40Pay $144,209

The return

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