Mount Rainier above forested ridges in Washington
Foundation Lookup

Form 990-PFTax year 2025EIN 91-6458451

Wissner-Slivka Foundation

A private foundation in Clyde Hill, WA. Its return for tax year 2025 lists 1 grant and $1,000 paid in grants.

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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

    $1,000

    Grants listed
    1
    Assets, end of year
    $1,580,729

  • Tax year 2024

    $146,000

    Grants listed
    3
    Assets, end of year
    $1,522,301

  • Tax year 2023

    $251,000

    Grants listed
    2
    Assets, end of year
    $1,597,139

  • Tax year 2022

    $201,883

    Grants listed
    6
    Assets, end of year
    $1,931,966

  • Tax year 2021

    $257,592

    Grants listed
    6
    Assets, end of year
    $1,948,205

  • Tax year 2020

    $165,144

    Grants listed
    4
    Assets, end of year
    $2,209,263

  • Tax year 2019

    $480,414

    Grants listed
    4
    Assets, end of year
    $2,376,828

  • Tax year 2018

    $123,467

    Grants listed
    3
    Assets, end of year
    $2,845,187

Grants paid in 2025

1 grant, largest first

As listed on the return.

  1. Kindering CenterBellevue, WA

    General support

    $1,000

Where the money goes

By State

Grants to organizations with a US address, latest year.

  1. Washington1 grant $1,000

Officers, directors and trustees

5 people as filed

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

  • Benjamin W SlivkaTRUSTEE Hours 0.75Pay $0
  • Lisa Wissner-SlivkaTRUSTEE Hours 0.75Pay $0
  • Max SlivkaTRUSTEE Hours 0.25Pay $0
  • Nathaniel SlivkaTRUSTEE Hours 0.25Pay $0
  • Lauren SlivkaTRUSTEE Hours 0.25Pay $0

The return

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