Winiarski Family Foundation
Invitation OnlyYountville, California · EIN 26-0474242 · Private foundation
Grants paid (2025)$43.1M
Organizations funded3
Typical grant$3,121,614
Total assets$1.7M
Half of its grants to organizations were between $2,446,087 and $37,500,000.
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.
Where it gives
66% of grants went outside California.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| St Johns College | Santa Fe, NM | Financial support for the organization | $37,500,000 |
| Smithsonian Institution | Washington, DC | Financial support for the organization | $3,121,614 |
| UC Davis Foundation | Davis, CA | Financial support for the organization | $2,446,087 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $43,067,701 | 3 |
| 2024 | $14,206,820 | 6 |
| 2023 | $3,970,514 | 28 |
Sources
- IRS Form 990-PF, tax year 2025, filed May 12, 2026 - IRS e-file batch, object ID 202621329349100622
- IRS Tax Exempt Organization Search for EIN 26-0474242
- 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.