Mount Rainier above forested ridges in Washington
Foundation Lookup

Form 990-PFTax year 2025EIN 93-4298183

Oosterhof Foundation Inc

A private foundation in Sammamish, WA. Its return for tax year 2025 lists 6 grants and $32,475 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

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

  • Tax year 2025

    $32,475

    Grants listed
    6
    Assets, end of year
    $1,157,778

  • Tax year 2024

    $0

    Grants listed
    0
    Assets, end of year
    $1,178,629

  • Tax year 2023

    $0

    Grants listed
    0
    Assets, end of year
    $95,135

Grants paid in 2025

6 grants, largest first

As listed on the return.

  1. Northwestern UniversityEvanston, IL

    General purpose

    $10,000
  2. Oklahoma State University FoundationStillwater, OK

    General purpose

    $10,000
  3. Seattle Children's FoundationSeattle, WA

    General purpose

    $10,000
  4. Bloodworks Northwest Co DevelopmentSeattle, WA

    General purpose

    $1,000
  5. Medic One FoundationBellevue, WA

    General purpose

    $1,000
  6. St Jude Catholic ChurchRedmond, WA

    General purpose

    $475

Where the money goes

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

  1. Education1 grant $10,00048% of the total
  2. Sports and recreation1 grant $10,00048% of the total
  3. Health1 grant $1,0005% of the total

By State

Grants to organizations with a US address, latest year.

  1. Washington4 grants $12,475
  2. Illinois1 grant $10,000
  3. Oklahoma1 grant $10,000

Officers, directors and trustees

2 people as filed

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

  • Ernst P OosterhofDIRECTOR Hours 1Pay $0
  • Kathy OosterhofDIRECTOR Hours 1Pay $0

The return

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