Winokur Foundation
Winokur Foundation is a private foundation, based in Bryn Mawr, PA. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $14.4M in total assets. In 2025, it awarded 2 grants totaling $700K. Net investment income was $353K.
Key facts about Winokur Foundation
In short: Winokur Foundation gave $700K across 2 grants in 2025 (avg $350K), mostly in Massachusetts. Source: 2025 IRS Form 990-PF.
- EIN
- 23-6856163
- Latest 990 filing
- Form 990-PF, 2025
- Annual giving (2025)
- $700,000
- Grants made (2025)
- 2
- Average grant
- $350,000
- Median grant
- $350,000
- Total assets
- $14,444,119
- Primary geography
- Massachusetts (86% of itemized 2025 grant dollars)
Data from IRS Form 990-PF, 2025; updated September 2026.
Financial Overview
From 2025 IRS Form 990-PF · View filing
Total Assets
$14.4M
-3.3% YoY
Annual Giving
$700K
+35.4% YoY
Grant Count
2
+100.0% YoY
Avg Grant Size
$350K
-32.3% YoY
Under IRS private-foundation payout rules, Winokur Foundation reported a distributable amount of $707K for 2025 — the minimum it must pay out in qualifying distributions.
How Winokur Foundation gives
- Giving fell 33% from 2022 to 2025. Method
- In 2025 it paid out 99% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
From the foundation's IRS Form 990-PF filings. Methodology.
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of all 2 itemized 2025 grant dollars.
Cities
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 2 recipients in 2025
Grant Size Distribution
8 grants across all recorded years
Giving History
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| BRANDEIS UNIVERSITY Waltham, MA | JULIE C. CONNIG PROFESSORSHIP IN ENGINEERING SCIENCE | $600,000 |
| THE POSSE FOUNDATION INC New York, NY | GENERAL CHARITABLE PURPOSES | $100,000 |
Financial History
Multi-year comparison from IRS filings
| Metric | 2025 | 2024 | 2023 |
|---|---|---|---|
| Total Assets | $14,444,119 | $14,943,578 | $12,877,569 |
| Revenue | $336,684 | $489,879 | $253,378 |
| Expenses | $710,401 | $519,692 | $309,606 |
| Qualifying Distributions | $700,000 | $517,000 | $300,000 |
| Net Investment Income | $353,367 | $487,187 | $250,972 |
| Distributable Amount | $706,548 | $656,865 | $590,962 |
Data update history
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS June 8, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS June 10, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS May 26, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS July 5, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS November 17, 2023)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS August 26, 2025)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS June 11, 2026)
- Added Form 990-PF for fiscal year 2019 (received by the IRS June 8, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS June 10, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS May 26, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS July 5, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS November 17, 2023)
Leadership & Key People
Officers and directors from IRS filings
Winokur Foundation is led by Barton J. Winokur, Trustee on every filing since 2019 — the only officer listed, and uncompensated.
Officers on the 2025 filing
Barton J. Winokur
Trustee
On filings since 2019
0.5 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Frequently asked questions about Winokur Foundation
How much does Winokur Foundation give each year?
Winokur Foundation gave $700K across 2 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $517K across 1 grant.
How large is Winokur Foundation?
Winokur Foundation reported $14.4M in total assets on its 2025 IRS Form 990-PF. It paid out $700K in qualifying distributions that year, against a required minimum of $707K (roughly 5% of its investment assets).
Where does Winokur Foundation operate?
Winokur Foundation has awarded grants in Iowa, Massachusetts, New York, Pennsylvania, Rhode Island.
What is Winokur Foundation's EIN?
Winokur Foundation's EIN (Employer Identification Number) is 23-6856163. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Here's the math on researching Winokur Foundation by hand.
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