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Form 990-PFTax year 2025EIN 73-6215491

Mark Diehl Trust

A private foundation in Claremore, OK. Its return for tax year 2025 lists 4 grants and $42,409 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

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

  • Tax year 2025

    $42,409

    Grants listed
    4
    Assets, end of year
    $704,808

  • Tax year 2024

    $38,928

    Grants listed
    4
    Assets, end of year
    $717,549

  • Tax year 2023

    $37,940

    Grants listed
    4
    Assets, end of year
    $728,081

  • Tax year 2022

    $37,846

    Grants listed
    4
    Assets, end of year
    $741,424

  • Tax year 2021

    $7,922

    Grants listed
    4
    Assets, end of year
    $775,264

Grants paid in 2025

4 grants, largest first

As listed on the return.

  1. Oklahoma Medical Research FoundationOklahoma City, OK

    General purposes

    $27,566
  2. Sacred Heart Catholic ChurchFairfax, OK

    General purposes

    $6,361
  3. Roman Catholic Diocese of TulsaTulsa, OK

    General purposes

    $4,241
  4. Fairfax Public LibraryFairfax, OK

    General purposes

    $4,241

Where the money goes

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

  1. Medical research1 grant $27,566100% of the total

By State

Grants to organizations with a US address, latest year.

  1. Oklahoma4 grants $42,409

Officers, directors and trustees

1 person as filed

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

  • RCB BankTRUSTEE Hours 2Pay $7,631

The return

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