The Massachusetts State Capitol
Foundation Lookup

Form 990-PFTax year 2025EIN 46-1451480

The Diomedes Foundation

A private foundation in Concord, MA. Its return for tax year 2025 lists 18 grants and $2.3 million paid in grants.

See which foundations fund work like yours Matching by cause, place and grant size

Tax year 2025 (period ending Dec 31, 2025), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

How to apply

Preselected only

The return checks the box saying the foundation gives only to preselected organizations and does not accept unsolicited requests.

Assets and giving by year

8 returns on file
Grants paid by tax year. The latest year is in blue.

  • Tax year 2025

    $2,257,290

    Grants listed
    18
    Assets, end of year
    $941,204

  • Tax year 2024

    $360,500

    Grants listed
    14
    Assets, end of year
    $2,105,097

  • Tax year 2023

    $367,500

    Grants listed
    13
    Assets, end of year
    $2,144,269

  • Tax year 2022

    $318,985

    Grants listed
    11
    Assets, end of year
    $2,342,202

  • Tax year 2021

    $498,375

    Grants listed
    21
    Assets, end of year
    $2,608,263

  • Tax year 2020

    $226,932

    Grants listed
    15
    Assets, end of year
    $2,740,966

  • Tax year 2019

    $177,750

    Grants listed
    27
    Assets, end of year
    $3,102,746

  • Tax year 2018

    $359,145

    Grants listed
    5
    Assets, end of year
    $3,201,150

Grants paid in 2025

18 grants, largest first

As listed on the return.

  1. Boynton Fmaily Fund - Fidelity CharitableCincinnati, OH

    To fund the recipient's operating budget

    $1,517,986
  2. Harvard UniversityCambridge, MA

    To fund the recipient's operating budget

    $292,000
  3. Emerson HealthConcord, MA

    To fund the recipient's operating budget

    $130,350
  4. Middlesex SchoolConcord, MA

    To fund the recipient's operating budget

    $95,000
  5. Renaissance Charitable Foundation Inc - Theodora Park FundIndianapolis, IN

    To fund the recipient's operating budget

    $50,000
  6. Concord Carlisle FoundationConcord, MA

    To fund the recipient's operating budget

    $26,100
  7. Island Housing TrustMount Desert, ME

    To fund the recipient's operating budget

    $25,000
  8. California Community FoundationLos Angeles, CA

    To fund the recipient's operating budget

    $22,500
  9. Mount Desert Nursing AssociationNortheast Harbor, ME

    To fund the recipient's operating budget

    $15,000
  10. The Umbrella Arts CenterConcord, MA

    To fund the recipient's operating budget

    $15,000
  11. The Trustees of Hamilton CollegeClinton, NY

    To fund the recipient's operating budget

    $13,000
  12. Ubuntu Global ConnectionsConcord, MA

    To fund the recipient's operating budget

    $10,000
  13. St Paul's SchoolConcord, NH

    To fund the recipient's operating budget

    $10,000
  14. Thoreau's BackyardConcord, MA

    To fund the recipient's operating budget

    $10,000
  15. The Concord BridgeConcord, MA

    To fund the recipient's operating budget

    $10,000
  16. Concord Free Public LibraryConcord, MA

    To fund the recipient's operating budget

    $8,354
  17. The Robbins HouseConcord, MA

    To fund the recipient's operating budget

    $5,000
  18. The Neighborhood HouseNortheast Harbor, ME

    To fund the recipient's operating budget

    $2,000

Where the money goes

By cause: grants to organizations we matched to the IRS list of exempt organizations, by their category.

  1. Education4 grants $126,35455% of the total
  2. Philanthropy and grantmaking2 grants $48,60021% of the total
  3. Housing and shelter1 grant $25,00011% of the total
  4. Health1 grant $15,0007% of the total
  5. International aid1 grant $10,0004% of the total
  6. Arts and culture1 grant $5,0002% of the total

By State

Grants to organizations with a US address, latest year.

  1. Ohio1 grant $1,517,986
  2. Massachusetts10 grants $601,804
  3. Indiana1 grant $50,000
  4. Maine3 grants $42,000
  5. California1 grant $22,500
  6. New York1 grant $13,000
  7. New Hampshire1 grant $10,000

Officers, directors and trustees

3 people as filed

As filed on the return, with average hours per week and pay from the foundation.

  • John W Boynton IVTRUSTEE Hours 1Pay $0
  • Johnanna N BoyntonTRUSTEE Hours 1Pay $0
  • James E Gowen IITRUSTEE Hours 1Pay $0

The return

More foundations

Similar foundations

Same main cause (education), giving between a quarter and four times this foundation’s where possible, nearby first.

  1. The Mosakowski Family Charitable FoundationSwampscott, MA 7 grants Preselected only $2,247,759 giving
  2. The Lowell InstituteBoston, MA 13 grants Preselected only $2,270,141 giving
  3. Brooks Family FoundationBoston, MA 35 grants Preselected only $2,243,500 giving
  4. Michael and Renee Minogue FoundationBoston, MA 27 grants Preselected only $2,218,456 giving
  5. The Cabot Family Charitable TrustBoston, MA 82 grants Preselected only $2,205,000 giving