Munger Charitable Trust Number One
Munger Charitable Trust Number One is a private foundation, based in Pasadena, CA. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $154.9M in total assets. In 2025, it awarded 8 grants totaling $3.5M. Net investment income was $96K.
Munger Charitable Trust Number One at a glance
In short: Munger Charitable Trust Number One gave $3.5M across 8 grants in 2025 (avg $440K), mostly in California. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $3,522,850
- +1308.2% vs 2024
- Grants made (2025)
- 8
- +700.0% vs 2024
- Average grant
- $440,356
- +76.0% vs 2024
- Median grant
- $255,612
- Total assets
- $154,871,910
- +165142.5% vs 2024
- Primary geography
- California (79% 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 Munger Charitable Trust Number One funds
How this funder distributes its grants
Top Recipients
Top 6 recipients in 2025
The largest 2025 recipient was Greater Horizons ($2.6M across 3 grants). Together the top 6 received $3.5M.
Grant Size Distribution
12 grants across all recorded years
The most common grant size was in the $250–500K range: 4 grants of 12 (33%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 8 itemized grants.
Cities
How Munger Charitable Trust Number One gives
- Giving grew 16675% from 2022 to 2025. Method
- In 2025 it paid out 53% 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 2020 to 2025, annual grant giving ranged from $20K (2020) to $3.5M (2025). In 2025 it made 8 grants totaling $3.5M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Greater Horizons Kansas City, CA | (1) description: 2 shares of berkshire hathaway class a securities (2) book value: $1,221,336 (3) method used to determine book value: average of the high/low on the date the securities were received by the foundation. (4) method used to determine fair market value: average of the high/low on the date the securities were donated. (5) date of the gift: 04/22/2025 (6) purpose: general operating support | $1,550,460 |
| Greater Horizons Kansas City, CA | (1) description: 990 shares of berkshire hathaway class b securities (2) book value: $450,411 (3) method used to determine book value: average of the high/low on the date the securities were received by the foundation. (4) method used to determine fair market value: average of the high/low on the date the securities were donated. (5) date of the gift: 04/24/2025 (6) purpose: general operating support | $522,864 |
| Greater Horizons Kansas City, MO | (1) description: 950 shares of berkshire hathaway class b securities (2) book value: $397,188 (3) method used to determine book value: average of the high/low on the date the securities were received by the foundation. (4) method used to determine fair market value: average of the high/low on the date the securities were donated. (5) date of the gift: 04/22/2025 (6) purpose: general operating support | $491,088 |
| Southern California Public Radio Pasadena, CA | (1) description: 486 shares of berkshire hathaway class b securities (2) book value: $197,855 (3) method used to determine book value: average of the high/low on the date the securities were received by the foundation. (4) method used to determine fair market value: average of the high/low on the date the securities were donated. (5) date of the gift: 04/15/2025 (6) purpose: general operating support | $258,377 |
| Our American Future Foundation Washington, DC | (1) description: 550 shares of berkshire hathaway class b securities (2) book value: $36,476 (3) method used to determine book value: average of the high/low on the date the securities were received by the foundation. (4) method used to determine fair market value: average of the high/low on the date the securities were donated. (5) date of the gift: 09/19/2024 (6) purpose: general operating support | $252,846 |
| Westridge School for Girls Inc Pasadena, CA | (1) description: 436 shares of berkshire hathaway class b securities (2) book value: $119,911 (3) method used to determine book value: average of the high/low on the date the securities were received by the foundation. (4) method used to determine fair market value: average of the high/low on the date the securities were donated. (5) date of the gift: 09/24/2024 (6) purpose: general operating support | $197,807 |
| Neighborhood Legal Services of Los Angeles Glendale, CA | Charitable | $150,000 |
| Santa Barbara Maritime Museum Santa Barbara, CA | (1) description: 218 shares of berkshire hathaway class b securities (2) book value: $14,458 (3) method used to determine book value: average of the high/low on the date the securities were received by the foundation. (4) method used to determine fair market value: average of the high/low on the date the securities were donated. (5) date of the gift: 09/20/2024 (6) purpose: general operating support | $99,408 |
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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 | $154,871,910 | $128,383,529 | $3,527,115 | $3,522,850 | 8 | $3,524,658 | $96,347 | $6,704,360 |
| 2024 | $93,724 | $25,051 | $252,620 | $250,162 | 1 | $250,187 | $22,718 | $27,545 |
| 2023 | $110,661 | $22,208 | $28,350 | $26,000 | 1 | $26,000 | $22,033 | $24,148 |
| 2022 | $116,803 | $16,944 | $23,306 | $21,000 | 1 | $21,000 | $16,794 | $25,971 |
| 2021 | $123,165 | $15,240 | $21,210 | $20,000 | 1 | — | $15,090 | $20,746 |
| 2020 | $129,135 | $15,940 | $22,348 | $20,000 | 1 | — | $15,790 | $20,015 |
Under IRS private-foundation payout rules, Munger Charitable Trust Number One reported a distributable amount of $6.7M for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Munger Charitable Trust Number One is led by William H. Borthwick, Trustee on every filing since 2020 — the only officer listed, and uncompensated.
Officers on the 2025 filing
William H. Borthwick
Trustee
On filings since 2020
0.5 hrs/week
No compensation reported
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 Munger Charitable Trust Number One
How much does Munger Charitable Trust Number One give each year?
Munger Charitable Trust Number One gave $3.5M across 8 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $250K across 1 grant.
What is Munger Charitable Trust Number One's typical grant size?
Munger Charitable Trust Number One's median grant in 2025 was $255,612, and its average grant was $440,356, across 8 grants on its 2025 IRS Form 990-PF.
Where does Munger Charitable Trust Number One give grants?
Munger Charitable Trust Number One gives mostly in California: 79% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest states were Missouri (14%) and District of Columbia (7%). The most frequent recipient cities were Kansas City, CA (2 grants) and Pasadena, CA (2 grants).
Does Munger Charitable Trust Number One give general operating support?
Yes: 88% of Munger Charitable Trust Number One's 2025 grants with a stated purpose (7 of 8) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are Munger Charitable Trust Number One's largest grantees?
Munger Charitable Trust Number One's largest 2025 grantees include Greater Horizons ($2,564,412 across 3 grants), Southern California Public Radio ($258,377) and Our American Future Foundation ($252,846), according to its 2025 IRS Form 990-PF. Together they received 87% of its itemized 2025 grant dollars.
How large is Munger Charitable Trust Number One?
Munger Charitable Trust Number One reported $154.9M in total assets on its 2025 IRS Form 990-PF. It paid out $3.5M in qualifying distributions that year, against a required minimum of $6.7M (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 Munger Charitable Trust Number One's EIN?
Munger Charitable Trust Number One's EIN (Employer Identification Number) is 27-6085454. 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
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2025
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