Castaing Family Foundation
Castaing Family Foundation is a private foundation, based in Scottsdale, AZ. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $413K in total assets. In 2025, it awarded 8 grants totaling $53K. Net investment income was $27K.
Castaing Family Foundation at a glance
In short: Castaing Family Foundation gave $53K across 8 grants in 2025 (avg $7K), mostly in Michigan. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $53,000
- -32.9% vs 2024
- Grants made (2025)
- 8
- -20.0% vs 2024
- Average grant
- $6,625
- -16.1% vs 2024
- Median grant
- $3,000
- Total assets
- $413,449
- -6.0% vs 2024
- Primary geography
- Michigan (50% 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 Castaing Family Foundation funds
How this funder distributes its grants
Top Recipients
Top 8 recipients in 2025
The largest 2025 recipient was Mayo Clinic ($20K). Together the top 8 received $53K.
Grant Size Distribution
26 grants across all recorded years
The most common grant size was under $50K: 26 grants of 26 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 8 itemized grants.
Cities
How Castaing Family Foundation gives
- Giving grew 1414% from 2022 to 2025. Method
- In 2025 it paid out 232% 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 2019 to 2025, annual grant giving ranged from $4K (2022) to $79K (2024). In 2025 it made 8 grants totaling $53K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Mayo Clinic Rochester, MN | General Fund | $20,000 |
| Michigan Science Center Detroit, MI | General Fund | $20,000 |
| Detroit Symphony Orchestra Detroit, MI | General Fund | $5,000 |
| Play Works Oakland, CA | General Fund | $5,000 |
| American Red Cross Detroit, MI | General Fund | $1,000 |
| Friends of Public Radio AZ Tempe, AZ | General Fund | $1,000 |
| Detroit Inst of Arts Detroit, MI | General Fund | $500 |
| National Park Foundations Washington, DC | General Fund | $500 |
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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 | $413,449 | $34,800 | $61,062 | $53,000 | 8 | $53,000 | $26,738 | $22,861 |
| 2024 | $439,711 | $30,320 | $87,106 | $79,000 | 10 | $79,000 | $22,214 | $25,115 |
| 2023 | $496,497 | $10,186 | $7,644 | — | — | — | $5,958 | $24,923 |
| 2022 | $493,955 | $1,154 | $11,133 | $3,500 | 2 | $3,500 | $4,404 | $24,735 |
| 2021 | $503,934 | $39,276 | $37,972 | $30,000 | 6 | $30,000 | $31,304 | $27,493 |
| 2020 | $502,630 | $-8,616 | $35,073 | $27,500 | 6 | — | $425 | $26,094 |
| 2019 | $546,319 | $16,974 | $43,007 | $34,000 | 9 | — | $7,967 | $27,994 |
Under IRS private-foundation payout rules, Castaing Family Foundation reported a distributable amount of $23K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Castaing Family Foundation is led by Maria A Castaing, Trustee President since 2020 (on filings since 2019); none of the 5 officers listed in 2025 report compensation.
Officers on the 2025 filing
Maria A Castaing
Trustee President
Secretary Tr → Trustee President, 2020
On filings since 2019
1 hr/week
No compensation reported
Eva J Wirthlin
Trustee
President → Trustee, 2020
On filings since 2019
1 hr/week
No compensation reported
Laura M Castaing
Trustee Treasurer
Trustee → Trustee Treasurer, 2020
On filings since 2019
1 hr/week
No compensation reported
Marta M Castaing
Trustee Secretary
Trustee → Trustee Secretary, 2020
On filings since 2019
1 hr/week
No compensation reported
Brigitte M Addimando
Trustee
On filings since 2024
1 hr/week
No compensation reported
Former officers (2)
- Former: Brigitte M. Castaing (2019–2023) — Trustee
- Former: Francois J. Castaing (2019–2022) — Trustee
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 Castaing Family Foundation
How much does Castaing Family Foundation give each year?
Castaing Family Foundation gave $53K across 8 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $79K across 10 grants.
What is Castaing Family Foundation's typical grant size?
Castaing Family Foundation's median grant in 2025 was $3,000, and its average grant was $6,625, across 8 grants on its 2025 IRS Form 990-PF.
Where does Castaing Family Foundation give grants?
Castaing Family Foundation gives mostly in Michigan: 50% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest states were Minnesota (38%) and California (9%). The most frequent recipient cities were Detroit, MI (4 grants).
Does Castaing Family Foundation give general operating support?
Yes: 100% of Castaing Family Foundation's 2025 grants with a stated purpose (8 of 8) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are Castaing Family Foundation's largest grantees?
Castaing Family Foundation's largest 2025 grantees include Mayo Clinic ($20,000), Michigan Science Center ($20,000) and Detroit Symphony Orchestra ($5,000), according to its 2025 IRS Form 990-PF. Together they received 85% of its itemized 2025 grant dollars.
How large is Castaing Family Foundation?
Castaing Family Foundation reported $413K in total assets on its 2025 IRS Form 990-PF. It paid out $53K in qualifying distributions that year, against a required minimum of $23K (roughly 5% of its investment assets).
What is Castaing Family Foundation's EIN?
Castaing Family Foundation's EIN (Employer Identification Number) is 38-3443775. 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.
Data update history
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS April 27, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS May 3, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS April 27, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS April 28, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS May 1, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS June 5, 2025)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS April 20, 2026)
- IRS filings on file for fiscal years 2019–2025
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