Mount Rainier above forested ridges in Washington

Form 990-PFTax year 2025EIN 91-2043791

The Thomsen Foundation

A private foundation in Seattle, WA. Its return for tax year 2025 lists 4 grants and $100,005 paid in grants.

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

    $100,005

    Grants listed
    4
    Assets, end of year
    $1,109,565
  • Tax year 2024

    $88,000

    Grants listed
    4
    Assets, end of year
    $1,120,786
  • Tax year 2023

    $80,000

    Grants listed
    6
    Assets, end of year
    $1,148,160
  • Tax year 2022

    $60,000

    Grants listed
    4
    Assets, end of year
    $1,183,804
  • Tax year 2021

    $90,000

    Grants listed
    4
    Assets, end of year
    $1,185,394
  • Tax year 2020

    $110,000

    Grants listed
    6
    Assets, end of year
    $1,269,424
  • Tax year 2019

    $93,000

    Grants listed
    5
    Assets, end of year
    $1,408,142
  • Tax year 2018

    $82,000

    Grants listed
    6
    Assets, end of year
    $1,471,720

Grants paid in 2025

4 grants, largest first

As listed on the return.

  1. Washington's National Park FundSeattle, WA

    For exempt purposes

    $25,005
  2. Charity Water (charity Global Inc)New York, NY

    For exempt purposes

    $25,000
  3. The Nature ConservancyArlington, VA

    For exempt purposes

    $25,000
  4. Washington State University FoundationPullman, WA

    For exempt purposes

    $25,000

Where the money goes

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

  1. Sports and recreation1 grant $25,00550% of the total
  2. Education1 grant $25,00050% of the total

By State

Grants to organizations with a US address, latest year.

  1. Washington2 grants $50,005
  2. New York1 grant $25,000
  3. Virginia1 grant $25,000

Officers, directors and trustees

2 people as filed

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

  • Mikal ThomsenDIRECTOR Hours 1Pay $0
  • Lynn ThomsenDIRECTOR Hours 1Pay $0

The return

More foundations

Similar foundations

Same main cause (sports and recreation), giving between a quarter and four times this foundation’s where possible, nearby first.

  1. Cynthia B Tomlinson FoundationSeattle, WA 8 grants Preselected only $101,000 giving
  2. Adrian Hanauer FoundationSeattle, WA 7 grants Preselected only $133,000 giving
  3. Stephen and Dianne Loeb Family FoundationSeattle, WA 6 grants Preselected only $70,000 giving
  4. Tom and Libby Edwards Family FoundationSeattle, WA 3 grants Preselected only $50,000 giving
  5. Original Art FoundationSeattle, WA 15 grants Preselected only $273,500 giving