Nion Robert Thieriot Foundation
Nion Robert Thieriot Foundation is a private foundation, based in Elk Mountain, WY. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $6.4M in total assets. In 2025, it awarded 8 grants totaling $862K. Net investment income was $743K.
Nion Robert Thieriot Foundation at a glance
In short: Nion Robert Thieriot Foundation gave $862K across 8 grants in 2025 (avg $108K), mostly in Massachusetts. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $862,000
- +18.9% vs 2024
- Grants made (2025)
- 8
- +0.0% vs 2024
- Average grant
- $107,750
- +18.9% vs 2024
- Median grant
- $90,000
- Total assets
- $6,351,020
- -3.1% vs 2024
- Primary geography
- Massachusetts (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 Nion Robert Thieriot Foundation funds
How this funder distributes its grants
Top Recipients
Top 8 recipients in 2025
The largest 2025 recipient was Greenagers ($252K). Together the top 8 received $862K.
Grant Size Distribution
34 grants across all recorded years
The most common grant size was under $50K: 13 grants of 34 (38%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 8 itemized grants.
States
Cities
How Nion Robert Thieriot Foundation gives
- Giving grew 33% from 2022 to 2025. Method
- In 2025 it paid out 104% 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 $510K (2019) to $862K (2025). In 2025 it made 8 grants totaling $862K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Greenagers South Egremont, MA | Donation | $252,000 |
| Berkshire Natural Resources Council Pittsfield, MA | Donation | $175,000 |
| New Marlborough Land Trust Southfield, MA | Donation | $150,000 |
| Sonoma Land Trust Santa Rosa, CA | Donation | $130,000 |
| Massachusetts SPCA Boston, MA | Donation | $50,000 |
| Monterey Preservation Land Trust Monterey, MA | Donation | $50,000 |
| The Nature Conservancy San Francisco, CA | Donation | $50,000 |
| Sturgeon's Mill Restoration Project Sebastopol, CA | Donation | $5,000 |
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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 | $6,351,020 | $971,082 | $1,162,614 | $862,000 | 8 | $889,605 | $743,260 | $852,191 |
| 2024 | $6,554,504 | $2,195,575 | $1,028,412 | $725,000 | 8 | $759,079 | $1,958,672 | $761,489 |
| 2023 | $5,373,057 | $1,569,413 | $799,658 | $610,000 | 8 | $631,560 | $1,401,637 | $609,811 |
| 2022 | $4,603,302 | $857,399 | $848,366 | $649,000 | 5 | $671,360 | $680,393 | $631,645 |
| 2021 | $4,594,269 | $194,916 | $821,798 | $618,000 | 5 | $640,889 | $14,007 | $710,876 |
| 2020 | $5,221,151 | $538,554 | $784,286 | $590,000 | 6 | — | $388,432 | $568,829 |
| 2019 | $5,466,883 | $727,712 | $662,907 | $510,000 | 5 | — | $601,075 | $483,422 |
Under IRS private-foundation payout rules, Nion Robert Thieriot Foundation reported a distributable amount of $852K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Nion Robert Thieriot Foundation's 2025 filing lists 2 officers; all 2 officers listed in 2025 are compensated.
Officers on the 2025 filing
Alice Richmond
Trustee
On filings since 2019
5 hrs/week
$45K (2019) → $75K (2025)
Peter E. Thieriot
Trustee
On filings since 2019
5 hrs/week
$45K (2019) → $75K (2025)
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.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $75K, to Peter E Thieriot (Trustee). 2 officers or directors reported compensation on that filing.
Frequently asked questions about Nion Robert Thieriot Foundation
How much does Nion Robert Thieriot Foundation give each year?
Nion Robert Thieriot Foundation gave $862K across 8 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $725K across 8 grants.
What is Nion Robert Thieriot Foundation's typical grant size?
Nion Robert Thieriot Foundation's median grant in 2025 was $90,000, and its average grant was $107,750, across 8 grants on its 2025 IRS Form 990-PF.
Where does Nion Robert Thieriot Foundation give grants?
Nion Robert Thieriot Foundation gives mostly in Massachusetts: 79% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest state was California (21%).
Does Nion Robert Thieriot Foundation give general operating support?
Not in 2025: none of the 8 grants with a stated purpose on Nion Robert Thieriot Foundation's 2025 IRS Form 990-PF were described as general or operating support. Recurring purposes include "Donation" (8 grants).
Who are Nion Robert Thieriot Foundation's largest grantees?
Nion Robert Thieriot Foundation's largest 2025 grantees include Greenagers ($252,000), Berkshire Natural Resources Council ($175,000) and New Marlborough Land Trust ($150,000), according to its 2025 IRS Form 990-PF. Together they received 67% of its itemized 2025 grant dollars.
How large is Nion Robert Thieriot Foundation?
Nion Robert Thieriot Foundation reported $6.4M in total assets on its 2025 IRS Form 990-PF. It paid out $890K in qualifying distributions that year, against a required minimum of $852K (roughly 5% of its investment assets).
What is Nion Robert Thieriot Foundation's EIN?
Nion Robert Thieriot Foundation's EIN (Employer Identification Number) is 83-0332938. 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 September 8, 2020)
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 14, 2026)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Nion Robert Thieriot Foundation funds
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