Oosterhof Foundation Inc
Invitation OnlySammamish, Washington · EIN 93-4298183 · Private foundation
Grants paid (2025)$32K
Organizations funded6
Typical grant$1,000
Total assets$1.6M
Half of its grants to organizations were between $1,000 and $10,000.
From the return
How to apply
On its return for tax year 2025 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
33% of grants went outside Washington.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Northwestern University | Evanston, IL | General purpose | $10,000 |
| Oklahoma State University Foundation | Stillwater, OK | General purpose | $10,000 |
| Seattle Children's Foundation | Seattle, WA | General purpose | $10,000 |
| Bloodworks Northwest Co Development | Seattle, WA | General purpose | $1,000 |
| Medic One Foundation | Bellevue, WA | General purpose | $1,000 |
| St Jude Catholic Church | Redmond, WA | General purpose | $475 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $32,475 | 6 |
| 2024 | $0 | 0 |
| 2023 | $0 | 0 |
Sources
- IRS Form 990-PF, tax year 2025, filed May 8, 2026 - IRS e-file batch, object ID 202631289349101853
- IRS Tax Exempt Organization Search for EIN 93-4298183
- Profile updated Nov 6, 2026
Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.