The Diomedes Foundation
Invitation OnlyConcord, Massachusetts · EIN 46-1451480 · Private foundation
Grants paid (2025)$2.3M
Organizations funded18
Typical grant$15,000
Total assets$931K
Half of its grants to organizations were between $10,000 and $50,000.
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
44% of grants went outside Massachusetts.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Boynton Fmaily Fund - Fidelity Charitable | Cincinnati, OH | To fund the recipient's operating budget | $1,517,986 |
| Harvard University | Cambridge, MA | To fund the recipient's operating budget | $292,000 |
| Emerson Health | Concord, MA | To fund the recipient's operating budget | $130,350 |
| Middlesex School | Concord, MA | To fund the recipient's operating budget | $95,000 |
| Renaissance Charitable Foundation Inc - Theodora Park Fund | Indianapolis, IN | To fund the recipient's operating budget | $50,000 |
| Concord Carlisle Foundation | Concord, MA | To fund the recipient's operating budget | $26,100 |
| Island Housing Trust | Mount Desert, ME | To fund the recipient's operating budget | $25,000 |
| California Community Foundation | Los Angeles, CA | To fund the recipient's operating budget | $22,500 |
| Mount Desert Nursing Association | Northeast Harbor, ME | To fund the recipient's operating budget | $15,000 |
| The Umbrella Arts Center | Concord, MA | To fund the recipient's operating budget | $15,000 |
| The Trustees of Hamilton College | Clinton, NY | To fund the recipient's operating budget | $13,000 |
| Ubuntu Global Connections | Concord, MA | To fund the recipient's operating budget | $10,000 |
| St Paul's School | Concord, NH | To fund the recipient's operating budget | $10,000 |
| Thoreau's Backyard | Concord, MA | To fund the recipient's operating budget | $10,000 |
| The Concord Bridge | Concord, MA | To fund the recipient's operating budget | $10,000 |
| Concord Free Public Library | Concord, MA | To fund the recipient's operating budget | $8,354 |
| The Robbins House | Concord, MA | To fund the recipient's operating budget | $5,000 |
| The Neighborhood House | Northeast Harbor, ME | To fund the recipient's operating budget | $2,000 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $2,257,290 | 18 |
| 2024 | $360,500 | 14 |
| 2023 | $367,500 | 13 |
Sources
- IRS Form 990-PF, tax year 2025, filed May 12, 2026 - IRS e-file batch, object ID 202641329349104589
- IRS Tax Exempt Organization Search for EIN 46-1451480
- 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.