Winslow Family Foundation
Winslow Family Foundation is a private foundation, based in Winterset, IA. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $2.0M in total assets. Net investment income was $30K.
Winslow Family Foundation at a glance
- Total assets
- $2,043,021
- +1.5% vs 2024
- Revenue (2025)
- $29,716
- -3.4% vs 2024
- Net investment income (2025)
- $29,716
- -3.4% vs 2024
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
Who Winslow Family Foundation funds
How this funder distributes its grants
Grant Size Distribution
7 grants across all recorded years
The most common grant size was in the $100–250K range: 3 grants of 7 (43%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Cities
How Winslow Family Foundation gives
- Giving grew 400% from 2021 to 2024. Method
- In 2024 it paid out 624% of its IRS minimum distribution (the 5% rule). Method
From the foundation's IRS Form 990-PF filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2024, annual grant giving ranged from $33K (2023) to $1.2M (2022). In 2024 it made 1 grant totaling $1.0M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Indian Hills Foundation Ottumwa, IA | AcademicBuilding | $1,000,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $2,043,021 | $29,716 | — | — | — | — | $29,716 | $147,502 |
| 2024 | $2,013,305 | $30,766 | $1,002,907 | $1,000,000 | 1 | $1,000,000 | $30,766 | $160,326 |
| 2023 | $2,985,446 | $30,372 | $34,422 | $33,000 | 2 | $33,000 | $30,372 | $165,113 |
| 2022 | $2,989,496 | $1,060,580 | $1,201,580 | $1,200,000 | 2 | $1,200,000 | $59,899 | $164,962 |
| 2021 | $3,130,496 | $64,872 | $201,206 | $200,000 | 2 | $200,000 | $64,872 | $177,855 |
| 2020 | $3,266,830 | $69,973 | $302,175 | $300,000 | 1 | — | $68,748 | $175,287 |
Under IRS private-foundation payout rules, Winslow Family Foundation reported a distributable amount of $148K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Winslow Family Foundation is led by Mairi Winslow, President & Director since 2025 (on filings since 2020); none of the 5 officers listed in 2025 report compensation.
Officers on the 2025 filing
Mairi Winslow
President & Director
Director → President & Director, 2025
On filings since 2020
No compensation reported
Laura Bertelson
Secretary & Director
On filings since 2020
No compensation reported
Mark Winslow
Director
On filings since 2020
No compensation reported
Meg Winslow Maffitt
Treasurer & Director
Director → Treasurer & Director, 2024
On filings since 2020
No compensation reported
Anne Winslow
Director
On filings since 2023
No compensation reported
Former officers (2)
- Former: Roger A Winslow (2020–2024) — President & Director
- Former: Anne Winslow-Cook (2020–2022) — Director
Data from IRS Form 990 filings, 2020–2025. "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 Winslow Family Foundation
How large is Winslow Family Foundation?
Winslow Family Foundation reported $2.0M in total assets on its 2025 IRS Form 990-PF. Its revenue that year was $30K.
Where does Winslow Family Foundation operate?
Winslow Family Foundation has awarded grants in Iowa, Kansas.
How much is Winslow Family Foundation required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2025, Winslow Family Foundation reported a distributable amount of $148K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is Winslow Family Foundation's EIN?
Winslow Family Foundation's EIN (Employer Identification Number) is 82-3321891. IRS Form 990 filing data is available on this page for 2020–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(2)
When this profile's IRS filing data changed on Grantable
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 11, 2026)
- IRS filings on file for fiscal years 2020–2024
Explore Open Grants
Browse active grant opportunities in Winslow Family Foundation's focus areas in our free grants database
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Winslow Family Foundation down — hundreds of funders to go?