William Townsend Porter Foundation Inc
Invitation OnlyBoston, Massachusetts · EIN 04-2104293 · Private foundation
Grants paid (2025)$178K
Organizations funded4
Typical grant$10,000
Total assets$4.4M
Half of its grants to organizations were between $9,126 and $17,000.
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
75% of grants went outside Massachusetts.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| American Physiological Society | Bethesda, MD | Support | $141,500 |
| Marine Biological Laboratory | Woods Hole, MA | Support | $17,000 |
| University of Louisville Research Foundation | Louisville, KY | Support | $10,000 |
| The Board of Trustees of the Leland Stanford Junior University | Redwood City, CA | Support | $9,126 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $177,626 | 4 |
| 2024 | $197,367 | 6 |
| 2023 | $185,500 | 3 |
Sources
- IRS Form 990-PF, tax year 2025, filed Aug 11, 2026 - IRS e-file batch, object ID 202632239349100118
- IRS Tax Exempt Organization Search for EIN 04-2104293
- 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.