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Form 990-PFTax year 2025EIN 20-1383344

The John P Calamos Foundation

A private foundation in Naperville, IL. Its return for tax year 2025 lists 13 grants and $999,600 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

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

  • Tax year 2025

    $999,600

    Grants listed
    13
    Assets, end of year
    $56,507,546

  • Tax year 2024

    $13,154,278

    Grants listed
    8
    Assets, end of year
    $44,851,372

  • Tax year 2023

    $1,612,000

    Grants listed
    13
    Assets, end of year
    $36,343,979

  • Tax year 2022

    $617,500

    Grants listed
    13
    Assets, end of year
    $28,753,287

  • Tax year 2021

    $175,000

    Grants listed
    6
    Assets, end of year
    $40,706,023

  • Tax year 2020

    $510,000

    Grants listed
    13
    Assets, end of year
    $29,634,729

  • Tax year 2018

    $220,000

    Grants listed
    3
    Assets, end of year
    $17,951,780

Grants paid in 2025

13 grants, largest first

As listed on the return.

  1. National Hellenic MuseumChicago, IL

    To support the mission of the charity

    $650,000
  2. Assumption Greek Orthodox ChurchHomer Glen, IL

    To support the mission of the charity

    $100,000
  3. St Nicholas Greek Orthodox ChurchNew York, NY

    To support the mission of the charity

    $100,000
  4. Hellenic Initiative IncNew York, NY

    To support the mission of the charity

    $50,000
  5. Washington Oxi Day FoundationWashington, DC

    To support the mission of the charity

    $50,000
  6. Loukoumi Make A Difference FoundationTuckahoe, NY

    To support the mission of the charity

    $25,000
  7. Gift of AdoptionNorthbrook, IL

    To support the mission of the charity

    $10,000
  8. St Iakovos Retreat CenterChicago, IL

    To support the mission of the charity

    $5,000
  9. Order of St AndrewNew York, NY

    To support the mission of the charity

    $4,000
  10. Hellenic American AcademyLowell, MA

    To support the mission of the charity

    $2,500
  11. Hillsdale CollegeHillsdale, MI

    To support the mission of the charity

    $2,000
  12. Turning Point USAIndianapolis, IN

    To support the mission of the charity

    $1,000
  13. Heritage FoundationWashington, DC

    To support the mission of the charity

    $100

Where the money goes

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

  1. Arts and culture2 grants $700,00093% of the total
  2. International aid1 grant $50,0007% of the total
  3. Education1 grant $2,000<1% of the total
  4. Public affairs1 grant $100<1% of the total

By State

Grants to organizations with a US address, latest year.

  1. Illinois5 grants $766,000
  2. New York4 grants $179,000
  3. District of Columbia2 grants $50,100
  4. Massachusetts1 grant $2,500
  5. Michigan1 grant $2,000

Officers, directors and trustees

5 people as filed

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

  • John P Calamos SrCO-TRUSTEE Hours 1Pay $0
  • Mae CalamosCO-TRUSTEE Hours 1Pay $0
  • Laura CalamosCO-TRUSTEE Hours 1Pay $0
  • James R AdamsCO-TRUSTEE Hours 1Pay $0
  • Kenneth S WitkowskiCO-TRUSTEE Hours 1Pay $0

The return

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