The Diomedes Foundation
Preselected recipients only
The Diomedes Foundation is a private foundation in Concord, Massachusetts. In tax year 2025 it gave $2.3 million in 18 grants; the typical grant was $15,000 and the largest $1.5 million. It only gives to organizations it selects itself and does not accept unsolicited applications.
From its IRS Form 990-PF for tax year 2025.
- Grants paid, 2025$2.3 million
- Number of grants18
- Typical grant$15,000
- Largest grant$1.5 million
- Assets$930,551
- New grantees67%
Giving in 2025 was up from $360,500 the year before.
67% of its 2025 grantees had not received a grant from it the year before, a sign it is open to new organizations.
Giving by year
| Tax year | Grants paid | Number of grants | Assets |
|---|---|---|---|
| 2023 | $367,500 | 13 | $2.8 million |
| 2024 | $360,500 | 14 | $2.8 million |
| 2025 | $2.3 million | 18 | $930,551 |
How to apply
The Diomedes Foundation says in its IRS filing that it only makes contributions to preselected organizations, so unsolicited applications are unlikely to be considered. Organizations it funds are usually invited.
What The Diomedes Foundation funds
Where it gives
Its grants went to recipients in 7 states, the most to Ohio.
| State | Grants | Amount |
|---|---|---|
| Ohio | 1 | $1.5 million |
| Massachusetts | 10 | $601,804 |
| Indiana | 1 | $50,000 |
| Maine | 3 | $42,000 |
| California | 1 | $22,500 |
| New York | 1 | $13,000 |
| New Hampshire | 1 | $10,000 |
Grants paid in 2025
| Recipient | Purpose | Amount |
|---|---|---|
| Boynton Fmaily Fund - Fidelity Charitable | To fund the recipient's operating budget | $1.5 million |
| Harvard University | To fund the recipient's operating budget | $292,000 |
| Emerson Health | To fund the recipient's operating budget | $130,350 |
| Middlesex School | To fund the recipient's operating budget | $95,000 |
| Renaissance Charitable Foundation Inc - Theodora Park Fund | To fund the recipient's operating budget | $50,000 |
| Concord Carlisle Foundation | To fund the recipient's operating budget | $26,100 |
| Island Housing Trust | To fund the recipient's operating budget | $25,000 |
| California Community Foundation | To fund the recipient's operating budget | $22,500 |
| Mount Desert Nursing Association | To fund the recipient's operating budget | $15,000 |
| The Umbrella Arts Center | To fund the recipient's operating budget | $15,000 |
| The Trustees of Hamilton College | To fund the recipient's operating budget | $13,000 |
| Ubuntu Global Connections | To fund the recipient's operating budget | $10,000 |
| St Paul's School | To fund the recipient's operating budget | $10,000 |
| Thoreau's Backyard | To fund the recipient's operating budget | $10,000 |
| The Concord Bridge | To fund the recipient's operating budget | $10,000 |
| Concord Free Public Library | To fund the recipient's operating budget | $8,354 |
| The Robbins House | To fund the recipient's operating budget | $5,000 |
| The Neighborhood House | To fund the recipient's operating budget | $2,000 |
Officers and trustees
- John W Boynton IV
- Johnanna N Boynton
- James E Gowen II
Questions people ask
Does The Diomedes Foundation accept grant applications?
No. Its IRS filing says it only makes contributions to preselected organizations.
How much does The Diomedes Foundation give?
$2.3 million in tax year 2025, across 18 grants, with a typical grant of $15,000.
Who runs The Diomedes Foundation?
Its 2025 filing lists John W Boynton IV (Trustee), Johnanna N Boynton (Trustee) and James E Gowen II (Trustee).
What does The Diomedes Foundation fund?
Based on its grants, mainly education, health and community development.