Big Rock Foundation Corp
Big Rock Foundation Corp is a private foundation focused on Human Services, based in San Francisco, CA. IRS filing data is available from 2021 through 2025. As of 2025, the organization holds $12.0M in total assets. In 2025, it awarded 1 grant totaling $1.0M. Net investment income was $3.3M.
Big Rock Foundation Corp at a glance
In short: Big Rock Foundation Corp gave $1.0M across 1 grant in 2025 (avg $1.0M), mostly in California. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $1,000,000
- Grants made (2025)
- 1
- Average grant
- $1,000,000
- Median grant
- $1,000,000
- Total assets
- $12,022,606
- +64.7% vs 2024
- Primary geography
- California (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 Big Rock Foundation Corp funds
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was Stanford University ($1.0M).
Grant Size Distribution
5 grants across all recorded years
The most common grant size was in the $50–100K range: 2 grants of 5 (40%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
States
Cities
How Big Rock Foundation Corp gives
- Giving fell 39% from 2022 to 2025. Method
- In 2025 it paid out 199% 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 2021 to 2025, annual grant giving ranged from $176K (2021) to $1.6M (2022). In 2025 it made 1 grant totaling $1.0M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Stanford University Stanford, CA | Community Support | $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 | $12,022,606 | $3,813,456 | $1,015,805 | $1,000,000 | 1 | $1,000,000 | $3,327,126 | $502,791 |
| 2024 | $7,297,804 | $283,088 | $16,914 | — | — | — | $266,174 | $522,462 |
| 2023 | $7,255,100 | $446,021 | $18,607 | — | — | — | $427,414 | $466,661 |
| 2022 | $6,852,954 | $4,781,236 | $1,670,861 | $1,650,000 | 1 | $1,650,000 | $4,760,375 | $316,171 |
| 2021 | $3,289,676 | $1,719,371 | $198,461 | $175,643 | 3 | — | $1,696,553 | $238,096 |
Under IRS private-foundation payout rules, Big Rock Foundation Corp reported a distributable amount of $503K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Big Rock Foundation Corp is led by Mgm, Director, President, Director & Secretary on every filing since 2021; none of the 3 officers listed in 2025 report compensation.
Officers on the 2025 filing
Mgm
Director, President, Director & Secretary
On filings since 2021
8 hrs/week
No compensation reported
Rm
Director & President
On filings since 2021
4 hrs/week
No compensation reported
Am
Director
On filings since 2021
4 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2021–2025. "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 Big Rock Foundation Corp
How much does Big Rock Foundation Corp give each year?
Big Rock Foundation Corp gave $1.0M across 1 grant in 2025, according to its 2025 IRS Form 990-PF.
How large is Big Rock Foundation Corp?
Big Rock Foundation Corp reported $12.0M in total assets on its 2025 IRS Form 990-PF. It paid out $1.0M in qualifying distributions that year, against a required minimum of $503K (roughly 5% of its investment assets).
What is Big Rock Foundation Corp?
Big Rock Foundation Corp is a private foundation focused on Human Services, based in San Francisco, CA. It holds $12.0M in total assets as of 2025.
Where does Big Rock Foundation Corp operate?
Big Rock Foundation Corp has awarded grants in California.
What is Big Rock Foundation Corp's EIN?
Big Rock Foundation Corp's EIN (Employer Identification Number) is 46-2153490. IRS Form 990 filing data is available on this page for 2021–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2021 (received by the IRS January 18, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS January 17, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS January 16, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS March 28, 2025)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS March 9, 2026)
- IRS filings on file for fiscal years 2021–2025
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