Nion Robert Thieriot Foundation
Invitation OnlyElk Mountain, Wyoming · EIN 83-0332938 · Private foundation
Grants paid (2025)$862K
Organizations funded8
Typical grant$50,000
Total assets$17.7M
Half of its grants to organizations were between $50,000 and $150,000.
From the return
How to apply
On its return for tax year 2025 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
100% of grants went outside Wyoming.
Grants paid in tax year 2025
| Recipient | Location | 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 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $862,000 | 8 |
| 2024 | $725,000 | 8 |
| 2023 | $610,000 | 8 |
Sources
- IRS Form 990-PF, tax year 2025, filed May 14, 2026 - IRS e-file batch, object ID 202631349349102538
- IRS Tax Exempt Organization Search for EIN 83-0332938
- Profile updated Nov 6, 2026
Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.