Stoneriver Foundation
Stoneriver Foundation is a private foundation, based in Jackson, WY. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $2.9M in total assets. In 2025, it awarded 4 grants totaling $152K. Net investment income was $133K.
Stoneriver Foundation at a glance
In short: Stoneriver Foundation gave $152K across 4 grants in 2025 (avg $38K), mostly in Wyoming. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $152,400
- -1.7% vs 2024
- Grants made (2025)
- 4
- +0.0% vs 2024
- Average grant
- $38,100
- -1.7% vs 2024
- Median grant
- $28,650
- Total assets
- $2,940,942
- -0.8% vs 2024
- Primary geography
- Wyoming (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 Stoneriver Foundation funds
How this funder distributes its grants
Top Recipients
Top 4 recipients in 2025
The largest 2025 recipient was Wonder Institute ($95K). Together the top 4 received $152K.
Grant Size Distribution
25 grants across all recorded years
The most common grant size was under $50K: 17 grants of 25 (68%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 4 itemized grants.
Cities
How Stoneriver Foundation gives
- Giving fell 40% from 2022 to 2025. Method
- In 2025 it paid out 113% 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 $152K (2025) to $356K (2021). In 2025 it made 4 grants totaling $152K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Wonder Institute Jackson, WY | Special Project Fund | $95,000 |
| Community Foundation of Jackson HOL Jackson, WY | Matching Grant | $32,300 |
| Dancers Workshop Jackson, WY | General Support | $25,000 |
| The Thacher School Ojai, CA | General Support | $100 |
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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 | $2,940,942 | $133,487 | $154,444 | $152,400 | 4 | $154,444 | $133,487 | $136,915 |
| 2024 | $2,963,899 | $212,461 | $157,116 | $155,100 | 4 | $157,116 | $143,640 | $137,369 |
| 2023 | $2,910,735 | $117,737 | $180,618 | $179,100 | 5 | $180,298 | $117,417 | $146,347 |
| 2022 | $2,974,616 | $28,384 | $255,988 | $254,725 | 4 | $255,961 | $28,357 | $147,663 |
| 2021 | $3,202,220 | $6,513 | $356,940 | $355,700 | 8 | — | $6,473 | $161,184 |
| 2020 | $3,552,647 | $23,533 | $327,478 | $326,200 | 13 | — | $23,485 | $176,861 |
| 2019 | $3,857,105 | $70,882 | $290,851 | $289,616 | 14 | — | $70,809 | $189,330 |
Under IRS private-foundation payout rules, Stoneriver Foundation reported a distributable amount of $137K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Stoneriver Foundation is led by Gary K. Silberberg, President on every filing since 2019; none of the 5 officers listed in 2025 report compensation.
Officers on the 2025 filing
Gary K. Silberberg
President
On filings since 2019
No compensation reported
Lia Silberberg
Director
V President → Director, 2022
On filings since 2020
No compensation reported
Molly Silberberg
Director
On filings since 2022
No compensation reported
Adam Silberberg
Vice President
Secretary → V President, 2020
V President → Vice President, 2022
On filings since 2019
No compensation reported
Veronica K. Silberberg
Vice President
V President → Vice President, 2021
On filings since 2019
No compensation reported
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 Stoneriver Foundation
How much does Stoneriver Foundation give each year?
Stoneriver Foundation gave $152K across 4 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $155K across 4 grants.
What is Stoneriver Foundation's typical grant size?
Stoneriver Foundation's median grant in 2025 was $28,650, and its average grant was $38,100, across 4 grants on its 2025 IRS Form 990-PF.
Where does Stoneriver Foundation give grants?
Stoneriver Foundation gives mostly in Wyoming: 100% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The most frequent recipient cities were Jackson, WY (3 grants).
Does Stoneriver Foundation give general operating support?
Yes: 50% of Stoneriver Foundation's 2025 grants with a stated purpose (2 of 4) were for general or operating support, per its 2025 IRS Form 990-PF.
How large is Stoneriver Foundation?
Stoneriver Foundation reported $2.9M in total assets on its 2025 IRS Form 990-PF. It paid out $154K in qualifying distributions that year, against a required minimum of $137K (roughly 5% of its investment assets).
What is Stoneriver Foundation's EIN?
Stoneriver Foundation's EIN (Employer Identification Number) is 22-3787992. 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
(3)
When this profile's IRS filing data changed on Grantable
- Added Form 990-PF for fiscal year 2019 (received by the IRS June 7, 2020)
- Added Form 990-PF for fiscal year 2025 (received by the IRS July 20, 2026)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Stoneriver Foundation funds
Philanthropy, Voluntarism & Grantmaking Open opportunities, soonest deadline first.
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Browse active grant opportunities in Stoneriver Foundation's focus areas in our free grants database
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More similar funders
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