Winiarski Family Foundation
Preselected recipients only
Winiarski Family Foundation is a private foundation in Yountville, California. In tax year 2025 it gave $43.1 million in 3 grants; the typical grant was $3.1 million and the largest $37.5 million. It only gives to organizations it selects itself and does not accept unsolicited applications.
From its IRS Form 990-PF for tax year 2025.
- Grants paid, 2025$43.1 million
- Number of grants3
- Typical grant$3.1 million
- Largest grant$37.5 million
- Assets$1.7 million
- New grantees0%
Giving in 2025 was up from $14.2 million the year before.
0% of its 2025 grantees had not received a grant from it the year before, so most of its money goes to organizations it already funds.
Giving by year
| Tax year | Grants paid | Number of grants | Assets |
|---|---|---|---|
| 2023 | $4.0 million | 28 | $14.8 million |
| 2024 | $14.2 million | 6 | $1.8 million |
| 2025 | $43.1 million | 3 | $1.7 million |
How to apply
Winiarski Family Foundation says in its IRS filing that it only makes contributions to preselected organizations, so unsolicited applications are unlikely to be considered. Organizations it funds are usually invited.
What Winiarski Family Foundation funds
Where it gives
Its grants went to recipients in 3 states, the most to New Mexico.
| State | Grants | Amount |
|---|---|---|
| New Mexico | 1 | $37.5 million |
| District of Columbia | 1 | $3.1 million |
| California | 1 | $2.4 million |
Grants paid in 2025
| Recipient | Purpose | Amount |
|---|---|---|
| St Johns College | Financial support for the organization | $37.5 million |
| Smithsonian Institution | Financial support for the organization | $3.1 million |
| Uc Davis Foundation | Financial support for the organization | $2.4 million |
Officers and trustees
- Greg Bennett
- Stacy Madigan
- Thomas Suniville
Questions people ask
Does Winiarski Family Foundation accept grant applications?
No. Its IRS filing says it only makes contributions to preselected organizations.
How much does Winiarski Family Foundation give?
$43.1 million in tax year 2025, across 3 grants, with a typical grant of $3.1 million.
Who runs Winiarski Family Foundation?
Its 2025 filing lists Greg Bennett (President / Director), Stacy Madigan (Secretary / Director) and Thomas Suniville (Cfo / Director).
What does Winiarski Family Foundation fund?
Based on its grants, mainly education.