Thomas O Brown Foundation
Invitation OnlyWarrenville, Illinois · EIN 22-3894171 · Private foundation
Grants paid (2025)$261K
Organizations funded11
Typical grant$25,000
Total assets$6.2M
Half of its grants to organizations were between $10,000 and $30,000.
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 Illinois.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Glacier National Park Conservancy | Columbia Falls, MT | Preservation of park lands | $60,000 |
| Grand Teton National Park Foundation | Moose, WY | Park preservation | $30,000 |
| Greater Yellowstone Coalition | Bozeman, MT | Preservation of land/wildlife | $30,000 |
| Public Land Alliance | Washington, DC | National parks preservation | $30,000 |
| Friends of Whitefish Dunes State Park | Sturgeon Bay, WI | Conservation and promotion of whitefish dunes state park. | $25,000 |
| National Parks Conservation Association | Washington, DC | Preservation of land/wildlife | $25,000 |
| Palouse Land Trust | Moscow, ID | Land conservation of the palouse region | $25,000 |
| Rocky Mountain Conservancy | Estes Park, CO | National parks preservation | $20,000 |
| Washington's National Park Fund | Seattle, WA | Preservation of mt. rainier, north cascades, and olympic national parks | $10,000 |
| Tart Trails | Traverse City, MI | Enrich the traverse region by providing a network of trails, bikeways, and pedestrian ways | $5,000 |
| National Park Foundation | Baltimore, MD | National parks preservation | $1,000 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $261,000 | 11 |
| 2024 | $249,500 | 11 |
| 2023 | $262,500 | 13 |
Sources
- IRS Form 990-PF, tax year 2025, filed Aug 14, 2026 - IRS e-file batch, object ID 202602269349101010
- IRS Tax Exempt Organization Search for EIN 22-3894171
- Profile updated Nov 5, 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.