Grants paid by The Diomedes Foundation C/O John W Boynton IV Firehouse Capital
EIN 46-1451480 · Concord, MA · Form 990-PF, Part XV · NTEE T20
The Diomedes Foundation C/O John W Boynton IV Firehouse Capital of Concord, MA (EIN 46-1451480) reported 97 grants paid totaling $4,388,727 to 58 recipients in tax years 2018–2025, on Form 990-PF, Part XV. Derived from IRS e-file data, dataset version 2026.09.0, built 2026-09-03.
Grants paid
$4,388,727
97 grants
Recipients
58
distinct organizations
Tax years
2018–2025
7 filings in the corpus
By tax year
| Tax year | Grants paid | Amount paid | Approved for future |
|---|---|---|---|
| 2018 | 5 | $359,145 | — |
| 2020 | 15 | $226,932 | — |
| 2021 | 21 | $498,375 | — |
| 2022 | 11 | $318,985 | — |
| 2023 | 13 | $367,500 | — |
| 2024 | 14 | $360,500 | — |
| 2025 | 18 | $2,257,290 | — |
Top recipients
The 58 recipients receiving the most from The Diomedes Foundation C/O John W Boynton IV Firehouse Capital, by grants paid, out of 58 distinct recipients.
| Recipient | Match | Location | Grants | Total paid | Latest year |
|---|---|---|---|---|---|
| Boynton Fmaily Fund - Fidelity Charitable | U | Cincinnati, OH | 1 | $1,517,986 | 2025 |
| Harvard University 04-3009105 | C | Cambridge, MA | 4 | $628,375 | 2025 |
| Emerson Hospital 04-2103565 | B | Concord, MA | 2 | $210,000 | 2023 |
| Middlesex School 04-2103821 | B | Concord, MA | 5 | $197,467 | 2025 |
| President and Fellows of Harvard College 04-2103580 | C | Boston, MA | 2 | $150,000 | 2022 |
| Concord Free Public Library 04-2121328 | C | Concord, MA | 4 | $130,854 | 2025 |
| Emerson Health | U | Concord, MA | 1 | $130,350 | 2025 |
| Emerson Health Foundation 04-2770980 | C | Concord, MA | 1 | $115,000 | 2024 |
| Harvard Varisity Club 04-2104295 | C | Boston, MA | 5 | $105,000 | 2024 |
| Harvard College Fund | U | Boston, MA | 1 | $100,000 | 2023 |
| Northeast Harbor Sailing School 01-0535123 | B | Northeast Harbor, ME | 2 | $100,000 | 2024 |
| Theodora Park Foundation Co Carlos Byrne Bny Mellon Charitable Gift Fund | U | Boston, MA | 1 | $100,000 | 2021 |
| California Community Foundation 95-3510055 | B | Los Angeles, CA | 5 | $75,500 | 2025 |
| Island Housing Trust 02-0549245 | C | West Tisbury, MA | 2 | $75,000 | 2024 |
| Concord Museum 04-2725624 | D | Concord, MA | 3 | $64,500 | 2021 |
| Amherst College 04-1031700 | D | Amherst, MA | 1 | $61,645 | 2018 |
| Trustees of Hamilton College 15-0532200 | B | Clinton, NY | 3 | $58,000 | 2025 |
| Island Housing Trust 22-2993615 | B | Mount Desert, ME | 2 | $50,000 | 2025 |
| Renaissance Charitable Foundation Inc - Theodora Park Fund 35-2129262 | D | Indianapolis, IN | 1 | $50,000 | 2025 |
| The Childrens Room 04-3123184 | D | Arlington, MA | 5 | $50,000 | 2024 |
| Harlem Lacrosse | U | New York, NY | 2 | $35,000 | 2021 |
| Harvard College Fund Co Harvard University | U | Boston, MA | 1 | $35,000 | 2021 |
| Concord Carlisle Foundation 04-2157042 | B | Concord, MA | 1 | $26,100 | 2025 |
| USA Hockey Foundation 74-2553720 | B | Colorado Springs, CO | 1 | $25,000 | 2021 |
| Concord250 88-3924554 | D | Concord, MA | 1 | $25,000 | 2024 |
| Wonmen's Sport Foundation | U | New York, NY | 1 | $25,000 | 2022 |
| Umbrella Arts Center | U | Concord, MA | 2 | $20,000 | 2025 |
| St Paul's School 02-0222227 | B | Concord, NH | 2 | $20,000 | 2025 |
| Mount Desert Nursing Association 01-0211798 | B | Northeast Harbor, ME | 2 | $15,100 | 2025 |
| Household Goods Inc 04-3468139 | B | Acton, MA | 1 | $15,000 | 2020 |
| Ubuntu Global Connections Inc 45-3558133 | B | Concord, MA | 2 | $15,000 | 2025 |
| Citizen Schools 04-3259160 | B | Boston, MA | 2 | $12,500 | 2021 |
| Mt Desert Community Development Corp | U | Northeast Harbor, ME | 1 | $10,000 | 2023 |
| Thoreau's Backyard | U | Concord, MA | 1 | $10,000 | 2025 |
| Carnegie Initiative | U | Lexington, MA | 1 | $10,000 | 2023 |
| Concord Center for the Visual Arts | U | Concord, MA | 1 | $10,000 | 2024 |
| American Promise Inc 47-4608840 | B | Concord, MA | 1 | $10,000 | 2023 |
| Steppingstone Foundation 04-3086666 | C | Boston, MA | 1 | $10,000 | 2021 |
| The Concord Bridge | U | Concord, MA | 1 | $10,000 | 2025 |
| Axium Education | U | Zithulele | 1 | $10,000 | 2024 |
| Lookup Incubator Inc 84-2719205 | B | Concord, MA | 2 | $6,000 | 2021 |
| Cchs Parents Association | U | Concord, MA | 1 | $5,000 | 2018 |
| Communities for Restorative Justice 45-1220191 | C | Concord, MA | 1 | $5,000 | 2020 |
| The Robbins House 27-1631729 | B | Concord, MA | 1 | $5,000 | 2025 |
| The Umbrella Community Arts Center | U | Concord, MA | 1 | $5,000 | 2021 |
| Town of Concord | U | Concord, MA | 1 | $5,000 | 2021 |
| Hasty Pudding Theatricals | U | Cambridge, MA | 1 | $5,000 | 2021 |
| Deaconess Abundant Life Communities 85-2569793 | D | Concord, MA | 1 | $5,000 | 2024 |
| Concord-Carlisle Community Chest | U | Concord, MA | 1 | $5,000 | 2021 |
| The Neighborhood House 95-1648184 | C | San Diego, CA | 1 | $5,000 | 2024 |
| Concord Middle School Parent-Teacher Group's Aaa Fund | U | Concord, MA | 1 | $5,000 | 2018 |
| Positive Coaching Alliance 77-0485946 | B | Okland, CA | 1 | $5,000 | 2022 |
| The Neighborhood House 22-2760713 | C | Northeast Harbor, ME | 2 | $3,000 | 2025 |
| Sports Museum of Ne Inc 04-2637109 | B | Boston, MA | 1 | $2,850 | 2022 |
| The Scholarship Fund of Concord 04-6141569 | D | Concord, MA | 1 | $1,000 | 2020 |
| Rockend Art Barn | U | Northeast, ME | 1 | $1,000 | 2020 |
| Thinkgive 46-1826783 | B | Concord, MA | 1 | $1,000 | 2021 |
| Northeast Harbor Library 01-0220091 | B | Northeast Harbor, ME | 1 | $500 | 2020 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Every grant
All 97 grant rows this organization reported, most recent first.
| Tax year | Recipient | Match | Amount | Type | Purpose | Source filing |
|---|---|---|---|---|---|---|
| 2025 | Boynton Fmaily Fund - Fidelity Charitable Cincinnati, OH | U | $1,517,986 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | Harvard University Cambridge, MA | C | $292,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | Emerson Health Concord, MA | U | $130,350 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | Middlesex School Concord, MA | B | $95,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | Renaissance Charitable Foundation Inc - Theodora Park Fund Indianapolis, IN | D | $50,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | Concord Carlisle Foundation Concord, MA | B | $26,100 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | Island Housing Trust Mount Desert, ME | B | $25,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | California Community Foundation Los Angeles, CA | B | $22,500 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | The Umbrella Arts Center Concord, MA | U | $15,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | Mount Desert Nursing Association Northeast Harbor, ME | B | $15,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | The Trustees of Hamilton College Clinton, NY | B | $13,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | St Paul's School Concord, NH | B | $10,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | The Concord Bridge Concord, MA | U | $10,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | Thoreau's Backyard Concord, MA | U | $10,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | Ubuntu Global Connections Concord, MA | B | $10,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | Concord Free Public Library Concord, MA | C | $8,354 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | The Robbins House Concord, MA | B | $5,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2025 | The Neighborhood House Northeast Harbor, ME | C | $2,000 | paid | TO FUND THE RECIPIENT'S OPERATING BUDGET | 202641329349104589 |
| 2024 | Emerson Health Foundation Concord, MA | C | $115,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | Northeast Harbor Sailing School Northeast Harbor, ME | B | $50,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | Trustees of Hamilton College Clinton, NY | B | $35,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | Concord250 Concord, MA | D | $25,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | Island Housing Trust Vineyard Haven, MA | D | $25,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | Harvard Varsity Club Inc Boston, MA | B | $25,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | Concord Free Public Library Corp Concord, MA | B | $20,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | California Community Foundation Los Angeles, CA | B | $15,500 | paid | CHARITABLE | 202540629349100329 |
| 2024 | The Childrens Room Arlington, MA | D | $10,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | Axium Education Zithulele | U | $10,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | St Paul's School Concord, NH | B | $10,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | Concord Center for the Visual Arts Concord, MA | U | $10,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | The Neighborhood House San Diego, CA | C | $5,000 | paid | CHARITABLE | 202540629349100329 |
| 2024 | Deaconess Abundant Life Communities Concord, MA | D | $5,000 | paid | CHARITABLE | 202540629349100329 |
| 2023 | Emerson Hospital Concord, MA | B | $110,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | Harvard College Fund Boston, MA | U | $100,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | Northeast Harbor Sailing School Northeast Harbor, ME | B | $50,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | Harvard Varsity Club Inc Boston, MA | B | $25,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | California Community Foundation Los Angeles, CA | B | $15,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | Mt Desert Community Development Corp Northeast Harbor, ME | U | $10,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | Middlesex School Concord, MA | B | $10,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | Trustees of Hamilton College Clinton, NY | B | $10,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | Carnegie Initiative Lexington, MA | U | $10,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | American Promise Inc Concord, MA | B | $10,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | The Childrens Room Arlington, MA | D | $10,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | Umbrella Arts Center Concord, MA | U | $5,000 | paid | CHARITABLE | 202420739349101207 |
| 2023 | Concord Fee Public Library Corp Concord, MA | D | $2,500 | paid | CHARITABLE | 202420739349101207 |
| 2022 | Emerson Hospital Concord, MA | B | $100,000 | paid | CHARITABLE | 202301359349100920 |
| 2022 | President and Fellow of Harvard College Cambridge, MA | C | $75,000 | paid | CHARITABLE | 202301359349100920 |
| 2022 | Middlesex School Concord, MA | B | $31,135 | paid | CHARITABLE | 202301359349100920 |
| 2022 | Wonmen's Sport Foundation New York, NY | U | $25,000 | paid | CHARITABLE | 202301359349100920 |
| 2022 | Harvard Varsity Club Inc Boston, MA | B | $25,000 | paid | CHARITABLE | 202301359349100920 |
| 2022 | Island Housing Trust Mount Desert, ME | B | $25,000 | paid | CHARITABLE | 202301359349100920 |
| 2022 | California Community Foundation Los Angeles, CA | B | $15,000 | paid | CHARITABLE | 202301359349100920 |
| 2022 | The Childrens Room Arlington, MA | D | $10,000 | paid | CHARITABLE | 202301359349100920 |
| 2022 | Positive Coaching Alliance Okland, CA | B | $5,000 | paid | CHARITABLE | 202301359349100920 |
| 2022 | Ubuntu Global Connections Inc Concord, MA | B | $5,000 | paid | CHARITABLE | 202301359349100920 |
| 2022 | Sports Museum of Ne Inc Boston, MA | B | $2,850 | paid | CHARITABLE | 202301359349100920 |
| 2021 | Theodora Park Foundation Co Carlos Byrne Bny Mellon Charitable Gift Fund Boston, MA | U | $100,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Concord Free Public Library Concord, MA | C | $100,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | President and Fellows of Harvard College Boston, MA | C | $75,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Island Housing Trust West Tisbury, MA | C | $50,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Harvard College Fund Co Harvard University Boston, MA | U | $35,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Middlesex School Concord, MA | B | $25,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | USA Hockey Foundation Colorado Springs, CO | B | $25,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Harvard University Cambridge, MA | C | $11,375 | paid | CHARITABLE | 202231479349100108 |
| 2021 | The Childrens Room Arlington, MA | D | $10,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Steppingstone Foundation Boston, MA | C | $10,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Harvard Varsity Club Boston, MA | B | $10,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Harlem Lacrosse New York, NY | U | $10,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | California Community Foundation Los Angeles, CA | B | $7,500 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Town of Concord Concord, MA | U | $5,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | The Umbrella Community Arts Center Concord, MA | U | $5,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Concord-Carlisle Community Chest Concord, MA | U | $5,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Lookup Incubator Inc Concord, MA | B | $5,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Hasty Pudding Theatricals Cambridge, MA | U | $5,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Citizen Schools Boston, MA | B | $2,500 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Concord Museum Concord, MA | D | $1,000 | paid | CHARITABLE | 202231479349100108 |
| 2021 | Thinkgive Concord, MA | B | $1,000 | paid | CHARITABLE | 202231479349100108 |
| 2020 | Harvard University Cambridge, MA | C | $100,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Middlesex School Concord, MA | B | $36,332 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Harlem Lacrosse New York, NY | U | $25,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Harvard Varisity Club Boston, MA | C | $20,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Household Goods Inc Acton, MA | B | $15,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Citizen Schools Boston, MA | B | $10,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | The Childrens Room Arlington, MA | D | $10,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Communities for Restorative Justice Concord, MA | C | $5,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Concord Museum Concord, MA | D | $1,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Rockend Art Barn Northeast, ME | U | $1,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | The Neighborhood House Northeast Harbor, ME | C | $1,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Lookup Incubator Inc Concord, MA | B | $1,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | The Scholarship Fund of Concord Concord, MA | D | $1,000 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Northeast Harbor Library Northeast Harbor, ME | B | $500 | paid | CHARITABLE | 202121339349101037 |
| 2020 | Mount Desert Nursing Association Northeast Harbor, ME | B | $100 | paid | CHARITABLE | 202121339349101037 |
| 2018 | Harvard University Cambridge, MA | C | $225,000 | paid | CHARITABLE | 201921359349102457 |
| 2018 | Concord Museum Concord, MA | D | $62,500 | paid | CHARITABLE | 201921359349102457 |
| 2018 | Amherst College Amherst, MA | D | $61,645 | paid | CHARITABLE | 201921359349102457 |
| 2018 | Concord Middle School Parent-Teacher Group's Aaa Fund Concord, MA | U | $5,000 | paid | CHARITABLE | 201921359349102457 |
| 2018 | Cchs Parents Association Concord, MA | U | $5,000 | paid | CHARITABLE | 201921359349102457 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Recipient matching for this dataset version has not yet completed its independent precision check. Tier A rows carry the EIN the filer reported; tiers B–D are the matcher's inference and should be read as leads until the check is published on the methodology page.
Source filings
Every figure above is traceable to one of these IRS e-file returns by its OBJECT_ID.
| Form | Tax year | Period end | Filed | Schema | IRS OBJECT_ID |
|---|---|---|---|---|---|
| 990PF | 2025 | 2025-12-31 | not stated | 2025v4.1 | 202641329349104589 |
| 990PF | 2024 | 2024-12-31 | not stated | 2024v5.0 | 202540629349100329 |
| 990PF | 2023 | 2023-12-31 | not stated | 2023v4.0 | 202420739349101207 |
| 990PF | 2022 | 2022-12-31 | not stated | 2022v5.0 | 202301359349100920 |
| 990PF | 2021 | 2021-12-31 | not stated | 2021v4.2 | 202231479349100108 |
| 990PF | 2020 | 2020-12-31 | not stated | 2020v4.1 | 202121339349101037 |
| 990PF | 2018 | 2018-12-31 | not stated | 2018v3.1 | 201921359349102457 |
Derived from IRS Form 990-PF e-file XML; recipient identities from the IRS Exempt Organizations Business Master File. Dataset version 2026.09.0, built 2026-09-03. The same rows as Parquet: manifest; as JSON: /api/funders/461451480.json.
The same organization elsewhere in the program: exempt status and filing health · federal awards · grant guidance · open opportunities.
This is informational only, derived from public data on the dates shown. It is not an eligibility determination, and not legal, tax, or accounting advice. Verify against the official source before relying on it.