Guenther Family Foundation
Guenther Family Foundation is a private foundation, based in San Jose, CA. IRS filing data is available from 2024 through 2025. As of 2025, the organization holds $21.9M in total assets. In 2025, it awarded 7 grants totaling $205K. Net investment income was $1.5M.
Guenther Family Foundation at a glance
In short: Guenther Family Foundation gave $205K across 7 grants in 2025 (avg $29K), top state District of Columbia. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $205,000
- +36.7% vs 2024
- Grants made (2025)
- 7
- +133.3% vs 2024
- Average grant
- $29,286
- -41.4% vs 2024
- Median grant
- $35,000
- Total assets
- $21,904,573
- +65.4% vs 2024
- Primary geography
- District of Columbia (46% 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 Guenther Family Foundation funds
How this funder distributes its grants
Top Recipients
Top 7 recipients in 2025
The largest 2025 recipient was Cato Institute ($50K). Together the top 7 received $205K.
Grant Size Distribution
10 grants across all recorded years
The most common grant size was under $50K: 6 grants of 10 (60%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 7 itemized grants.
Cities
How Guenther Family Foundation gives
- In 2025 it paid out 42% 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.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2024 to 2025, annual grant giving ranged from $150K (2024) to $205K (2025). In 2025 it made 7 grants totaling $205K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Cato Institute Washington, DC | To Support Charitable Function & Programs | $50,000 |
| The Heritage Foundation Washington, DC | To Support Charitable Function & Programs | $35,000 |
| Reagan Foundation Simi Valley, CA | To Support Charitable Function & Programs | $35,000 |
| Hoover Institute Stanford, CA | To Support Charitable Function & Programs | $35,000 |
| American Legislative Exchange Counc Arlington, VA | To Support Charitable Function & Programs | $25,000 |
| Manhattan Institute New York, NY | To Support Charitable Function & Programs | $15,000 |
| Federalist Society Washington, DC | To Support Charitable Function & Programs | $10,000 |
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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 | $21,904,573 | $7,523,047 | $482,929 | $205,000 | 7 | $354,311 | $1,543,823 | $844,406 |
| 2024 | $13,245,517 | $13,267,502 | $269,523 | $150,000 | 3 | $241,270 | $1,420,057 | $341,198 |
Under IRS private-foundation payout rules, Guenther Family Foundation reported a distributable amount of $844K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Guenther Family Foundation is led by Mark Milani, Trustee on every filing since 2024 — the only officer listed, and compensated.
Officers on the 2025 filing
Mark Milani
Trustee
On filings since 2024
10 hrs/week
$54K (2024) → $117K (2025)
Data from IRS Form 990 filings, 2024–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $117K, to Mark Milani (Trustee).
Frequently asked questions about Guenther Family Foundation
How much does Guenther Family Foundation give each year?
Guenther Family Foundation gave $205K across 7 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $150K across 3 grants.
What is Guenther Family Foundation's typical grant size?
Guenther Family Foundation's median grant in 2025 was $35,000, and its average grant was $29,286, across 7 grants on its 2025 IRS Form 990-PF.
Where does Guenther Family Foundation give grants?
Guenther Family Foundation's top state is District of Columbia, with 46% of the grant dollars itemized on its 2025 IRS Form 990-PF. The next largest states were California (34%) and Virginia (12%). The most frequent recipient cities were Washington, DC (3 grants).
Does Guenther Family Foundation give general operating support?
Not in 2025: none of the 7 grants with a stated purpose on Guenther Family Foundation's 2025 IRS Form 990-PF were described as general or operating support. Recurring purposes include "To Support Charitable Function & Programs" (7 grants).
Who are Guenther Family Foundation's largest grantees?
Guenther Family Foundation's largest 2025 grantees include Cato Institute ($50,000), The Heritage Foundation ($35,000) and Reagan Foundation ($35,000), according to its 2025 IRS Form 990-PF. Together they received 59% of its itemized 2025 grant dollars.
How large is Guenther Family Foundation?
Guenther Family Foundation reported $21.9M in total assets on its 2025 IRS Form 990-PF. It paid out $354K in qualifying distributions that year, against a required minimum of $844K (roughly 5% of its investment assets). Falling short in one year is not a violation: foundations have until the end of the next year to meet the minimum.
What is Guenther Family Foundation's EIN?
Guenther Family Foundation's EIN (Employer Identification Number) is 99-6237796. IRS Form 990 filing data is available on this page for 2024–2025.
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 2024 (received by the IRS September 23, 2025)
- Added Form 990-PF for fiscal year 2025 (received by the IRS August 4, 2026)
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