Thomas G Stamm Family Foundation
Thomas G Stamm Family Foundation is a private foundation focused on Diseases, Disorders & Medical Disciplines, based in Tucson, AZ. IRS filing data is available from 2022 through 2025. In 2025, it awarded 1 grant totaling $50K. Net investment income was $18.
Thomas G Stamm Family Foundation at a glance
In short: Thomas G Stamm Family Foundation gave $50K across 1 grant in 2025 (avg $50K), mostly in Arizona. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $49,641
- Grants made (2025)
- 1
- Average grant
- $49,641
- Median grant
- $49,641
- Primary geography
- Arizona (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
Who Thomas G Stamm Family Foundation funds
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was Elyse Sioles Foundation ($50K).
Grant Size Distribution
3 grants across all recorded years
The most common grant size was under $50K: 3 grants of 3 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
Cities
How Thomas G Stamm Family Foundation gives
- Giving grew 1886% from 2022 to 2025. Method
- In 2023 it paid out 443% 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 2022 to 2025, annual grant giving ranged from $3K (2022) to $50K (2025). In 2025 it made 1 grant totaling $50K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Elyse Sioles Foundation Paradise Valley, AZ | To Assist with Foundation Operations | $49,641 |
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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 | — | $18 | $53,141 | $49,641 | 1 | $49,641 | $18 | — |
| 2024 | $53,123 | $131 | $2,023 | — | — | — | — | $1,619 |
| 2023 | $55,015 | $439 | $11,744 | $10,816 | 1 | $10,816 | — | $2,442 |
| 2022 | $66,320 | $71,032 | $4,712 | $2,500 | 1 | $2,500 | $20 | $1,247 |
Leadership & Key People
Officers and directors from IRS filings
Thomas G Stamm Family Foundation is led by Elyse C. Sioles, President, Vice President & Secretary since 2023 (on filings since 2022); none of the 2 officers listed in 2025 report compensation.
Officers on the 2025 filing
Elyse C. Sioles
President, Vice President & Secretary
Secretary & Treasurer → President, Vice President & Secretary, 2023
On filings since 2022
0.5 hrs/week
No compensation reported
David S. Cutler
Treasurer
Director → Treasurer, 2023
On filings since 2022
0.5 hrs/week
No compensation reported
Former officers (1)
- Former: Robert S. Stamm (2022) — President & Vice President
Data from IRS Form 990 filings, 2022–2025. "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 Thomas G Stamm Family Foundation
How much does Thomas G Stamm Family Foundation give each year?
Thomas G Stamm Family Foundation gave $50K across 1 grant in 2025, according to its 2025 IRS Form 990-PF.
What is Thomas G Stamm Family Foundation?
Thomas G Stamm Family Foundation is a private foundation focused on Diseases, Disorders & Medical Disciplines, based in Tucson, AZ.
Where does Thomas G Stamm Family Foundation operate?
Thomas G Stamm Family Foundation has awarded grants in Arizona, Michigan.
What is Thomas G Stamm Family Foundation's EIN?
Thomas G Stamm Family Foundation's EIN (Employer Identification Number) is 87-3343804. IRS Form 990 filing data is available on this page for 2022–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2022–2025
Live grants for the work Thomas G Stamm Family Foundation funds
Diseases, Disorders & Medical Disciplines Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Thomas G Stamm Family Foundation's focus areas in our free grants database
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