Private Foundation

WINIARSKI FAMILY FOUNDATION

WINIARSKI FAMILY FOUNDATION is a private foundation categorized as Private Foundation based in YOUNTVILLE, CA. Its most recent IRS filing (2025) reports revenue of $43.0M, expenses of $43.1M, total assets of $1.7M. Imperigo tracks 274 reported grants from this foundation totaling approximately $66.7M.

EIN: 260474242 YOUNTVILLE, CA Latest filing: 2025

Total Revenue$43.0M

Total Expenses$43.1M

Total Assets$1.7M

Grants Given274

Grant Total$66.7M

Filing Years2021–2025

Sample Grants Given

ST JOHNS COLLEGE

SANTA FE, NM · 2025

FINANCIAL SUPPORT FOR THE ORGANIZATION

$37,500,000

SMITHSONIAN INSTITUTION

WASHINGTON, DC · 2025

FINANCIAL SUPPORT FOR THE ORGANIZATION

$3,121,614

UC DAVIS FOUNDATION

DAVIS, CA · 2025

FINANCIAL SUPPORT FOR THE ORGANIZATION

$2,446,087

ST JOHNS COLLEGE

SANTA FE, NM · 2024

FINANCIAL SUPPORT FOR THE ORGANIZATION

$12,500,000

QUEEN OF THE VALLEY MEDICAL CENTER FNDN

NAPA, CA · 2024

FINANCIAL SUPPORT FOR THE ORGANIZATION

$1,579,500

Showing up to 5 of 274 total records — full history available with membership.

Officers & Directors

PRESIDENT / DIRECTOR Greg Bennett

SECRETARY / DIRECTOR Stacy Madigan

CFO / DIRECTOR Thomas Suniville

Officer compensation and complete director data available with membership.

Top Grant Purposes

FINANCIAL SUPPORT FOR THE ORGANIZATION

$63,262,566 273 grants

BARBARA WINIARSKI STROKE AND DIAGNOSTIC CENTER

$3,460,500 1 grant

Financial Trends

Year	Revenue	Expenses	Assets
2025	$43.0M	$43.1M	$1.7M
2024	$2.5M	$14.3M	$1.8M
2023	$727K	$4.1M	$13.6M
2022	$451K	$1.0M	$17.0M
2021	$1.0M	$1.1M	$20.7M

Between 2021 and 2025, reported annual revenue grew from $1.0M to $43.0M (+4074%), with total assets most recently reported at $1.7M.

Interactive year-over-year charts and full filing details available with membership.

Grant Geography

Grants from this foundation were reported to recipients in CA, CO, DC, FL, IL, KS, and 4 other states.

CACODCFLILKSMAMDMENJ

Full geographic grant map with state-by-state breakdown available with membership.

See the full picture for WINIARSKI FAMILY FOUNDATION

Complete financials, all 274 grant records, officer compensation, year-over-year trend charts, a geographic grant map, and data exports — across 498,000+ organizations.

Full Financial History Complete Grant Activity Officer Compensation Year-over-Year Charts Geographic Grant Map Data Exports