The Donald Grant & Ann Martin Calder Foundat makes a small number of substantial grants focused on cultural heritage tied to sporting life and targeted environmental conservation. Their giving favors institutional recipients (libraries/museums and conservation NGOs) and includes support for an international philanthropic intermediary, suggesting interest in cross‑border or programmatic philanthropy as well as place‑based environmental work.
Highly concentrated: a few large grants per year, repeated funding to select institutional grantees rather than many small awards.
Donald Grant & Ann Martin Calder Foundat gives in a narrow set of areas, with a visible pattern of support for equestrian and sporting history institutions, river and wildlife conservation, and a few philanthropic intermediaries. Two of the clearest signals are repeated general-support grants to the National Sporting Library in Middleburg, Virginia, and six-figure support for King Baudouin Foundation USA in New York. The first points to interest in preserving sporting heritage and related collections; the second suggests a willingness to fund through an intermediary rather than only directly to program operators. The foundation also backs conservation work tied to specific species and places. Its recent grants include Atlantic Salmon Foundation in Calais, Maine, for conservation funds, and Game Conservancy in Greenwich, Connecticut, for general support. That mix of heritage, environmental protection, and institutional support makes the funder distinct: it appears to favor established organizations with a clear program or stewardship role rather than a broad portfolio of scattered small grants. Recent giving also reaches community and faith institutions in Hobe Sound, Florida, alongside a few higher-education and medical recipients.
In heritage and sporting history, Donald Grant & Ann Martin Calder Foundat gave $78,000 in both 2023 and 2024 to National Sporting Library in Middleburg, Virginia, for general support. That repeated support aligns with the foundation’s interest in institutions connected to sporting life and historical collections. In conservation, the foundation made a $100,000 grant to Atlantic Salmon Foundation in Calais, Maine, for conservation funds, and also gave the organization $5,000 in 2023 for general support. It further supported Game Conservancy in Greenwich, Connecticut, with $21,000 in 2024 and $12,000 in 2023. Its grantmaking also reaches environmental and wildlife groups such as Everglades Foundation in Palmetto Bay, Florida, Bonefish and Tarpon Trust in Miami, Florida, and Veterinary Initiative for Endangered Wildlife in Bozeman, Montana. The presence of King Baudouin Foundation USA suggests some support for intermediary philanthropic work as well.
$92K
$1.7M
$587K
$137K
Most grants fall between $1K and $10K, with a median of $2K.
25th Percentile
$1K
Median
$2K
75th Percentile
$10K
Top 2 recipient countries by grant volume for Donald Grant & Ann Martin Calder Foundat.
| Rank | Country | Grants | Total | Share |
|---|---|---|---|---|
| 1 | United StatesDomestic | 98 | $1.3M | 96.1% |
| 2 | France |
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Notable grantees: King Baudouin Foundation USA, National Sporting Library, Atlantic Salmon Foundation
Typical grants are modest to mid-sized: the distribution shows a p25 of $1,000, a median of $2,000, and a p75 of $10,185. The recent record includes both smaller general-support gifts and several larger institutional grants, including six-figure support. Grants recur across years to some recipients, including King Baudouin Foundation USA, National Sporting Library, Christ Memorial Chapel, Atlantic Salmon Foundation, Game Conservancy, and Jupiter Island Medical Clinic. The foundation gives as a private foundation, not to individuals, and the recent grants are mostly unrestricted or general-support awards.
Grant recipients are predominantly in the United States, with 55 grants there versus 2 in France. Within the U.S., Florida receives a substantial share of awards, and Hobe Sound appears repeatedly among recipients such as Christ Memorial Chapel, Hobe Sound Community Chest, Boys and Girls Club of Martin County, Jupiter Island Medical Clinic, Banner Lake Club, and Jupiter Island Garden Club Inc. Outside Florida, grants also cluster in New York, Virginia, Maine, Connecticut, and Massachusetts-adjacent regional conservation and heritage institutions.
The recent grants show support for cultural heritage institutions tied to sporting life, conservation organizations, and a smaller set of community, faith, medical, and educational nonprofits. Repeated recipients include National Sporting Library, Atlantic Salmon Foundation, Game Conservancy, and several Hobe Sound-based community institutions.
The grant-size distribution shows a p25 of $1,000, a median of $2,000, and a p75 of $10,185. That means many awards are in the low-thousands, with a smaller number of larger institutional grants.
Yes. The recent record shows repeated awards to several organizations across 2023 and 2024, including King Baudouin Foundation USA, National Sporting Library, Atlantic Salmon Foundation, Game Conservancy, Christ Memorial Chapel, and Jupiter Island Medical Clinic.
Its top state by grant count is Washington, while Florida recipients account for 34% of grants. The recipient list also includes organizations in New York, Virginia, Maine, Connecticut, and other U.S. states, plus two grants to recipients in France.
Most of the named awards are labeled general support or general-purpose support. There are a few more specific designations too, such as Atlantic Salmon Foundation’s conservation funds grant and the 2023 general-purpose grant to Everglades Foundation.
2026
Source: IRS Form 990-PF, fiscal year 2026.
| 4 |
| $4K |
3.9% |
Recipient country reflects the grantee's headquarters per IRS 990-PF and Schedule F filings, not the program's implementation country.
Most recent grants reported to the IRS.
| Recipient | Location | Amount | Year | Purpose |
|---|---|---|---|---|
| ATLANTIC SALMON FOUNDATION | CALAIS, ME | $36,000 | 2026 | GENERAL SUPPORT |
| RUSH UNIVERSITY SYSTEM FOR HEALTH | CHICAGO, IL | $25,000 | 2026 | GENERAL SUPPORT |
| NATIONAL SPORTING LIBRARY | MIDDLEBURG, VA | $15,000 | 2026 | GENERAL SUPPORT |
| JUPITER ISLAND ARTS COUNCIL | JUPITER, FL | $5,000 | 2026 | GENERAL SUPPORT |
| JUPITER ISLAND MEDICAL CLINIC | HOBE SOUND, FL | $5,000 | 2026 | GENERAL SUPPORT |
| MARINA ORTH FOUNDATION | WASHINGTON, DC | $2,000 | 2026 | GENERAL SUPPORT |
| 1000 FRIENDS OF FLORIDA | TALLAHASSEE, FL | $1,000 | 2026 | GENERAL SUPPORT |
| AMERICAN UNIVERSITY OF PARIS | PARIS, N/ | $1,000 | 2026 | GENERAL SUPPORT |
| IRISH GEORGIAN SOCIETY | CHICAGO, IL | $1,000 | 2026 | GENERAL SUPPORT |
| AFS INTERCULTURAL PROGRAMS USA | NEW YORK, NY | $500 | 2026 | GENERAL SUPPORT |
| ST ANDREW'S DUNE CHURCH | SOUTHAMPTON, NY | $200 | 2026 | GENERAL SUPPORT |
| MYRIAD USA | NEW YORK, NY | $94,000 | 2025 | GENERAL SUPPORT |
| CHRIST MEMORIAL CHAPEL | HOBE SOUND, FL | $50,600 | 2025 | GENERAL SUPPORT |
| EVERGLADES FOUNDATION | PALMETTO BAY, FL | $50,000 | 2025 | GENERAL PURPOSE |
| HOBE SOUND COMMUNITY CHEST | HOBE SOUND, FL | $20,000 | 2025 | GENERAL SUPPORT |
| GAME CONSERVANCY | GREENWICH, CT | $20,000 | 2025 | GENERAL SUPPORT |
| ST ANDREW'S DUNE CHURCH | SOUTHAMPTON, NY | $10,100 | 2025 | GENERAL SUPPORT |
| SOUTHAMPTON HOSPITAL FOUNDATION | SOUTHAMPTON, NY | $10,000 | 2025 | GENERAL SUPPORT |
| BANNER LAKE CLUB | HOBE SOUND, FL | $10,000 | 2025 | GENERAL SUPPORT |
| THE GARDEN CONSERVANCY | GARRISON, NY | $10,000 | 2025 | GENERAL SUPPORT |
| HOSPITAL FOR SPECIAL SURGERY FOUNDATION | NEW YORK, NY | $10,000 | 2025 | GENERAL SUPPORT |
| NATIONAL SPORTING LIBRARY | MIDDLEBURG, VA | $10,000 | 2025 | GENERAL SUPPORT |
| CONSERVATION FUND | ARLINGTON, VA | $5,000 | 2025 | GENERAL SUPPORT |
| JUPITER MEDICAL CENTER FOUNDATION | JUPITER, FL | $5,000 | 2025 | GENERAL SUPPORT |
| JUPITER ISLAND MEDICAL CLINIC | HOBE SOUND, FL | $5,000 | 2025 | GENERAL SUPPORT |
| ST JOHN'S ESPISCOPAL CHURCH | SOUTHAMPTON, NY | $5,000 | 2025 | GENERAL SUPPORT |
| BONEFISH AND TARPON TRUST | MIAMI, FL | $5,000 | 2025 | GENERAL SUPPORT |
| ST PAUL'S SCHOOL | CONCORD, NH | $4,000 | 2025 | GENERAL SUPPORT |
| WEILL CORNELL MEDICAL COLLEGE | NEW YORK, NY | $2,000 | 2025 | GENERAL SUPPORT |
| CENTER FOR INTERFAITH RELATIONS | LOUISVILLE, KY | $2,000 | 2025 | GENERAL SUPPORT |
| SSE ALUMNI USA INC (DBA AMERICAN FRIENDS OF SSE) | BROOKLYN, NY | $2,000 | 2025 | GENERAL SUPPORT |
| FRIENDS OF INDEPENDENT SCHOOLS AND BETTER EDUCATION | SEATTLE, WA | $2,000 | 2025 | GENERAL SUPPORT |
| BREAKWATER SCHOOL | PORTLAND, ME | $2,000 | 2025 | GENERAL SUPPORT |
| SOUTHAMPTON ASSOCIATION | SOUTHAMPTON, NY | $2,000 | 2025 | GENERAL SUPPORT |
| 1000 FRIENDS OF FLORIDA | TALLAHASSEE, FL | $1,000 | 2025 | GENERAL SUPPORT |
| JUPITER ISLAND GARDEN CLUB INC | HOBE SOUND, FL | $1,000 | 2025 | GENERAL SUPPORT |
| COMPUTER INNOVATIONS FOR TODAY'S YOUTH | PORT SAINT LUCIE, FL | $1,000 | 2025 | GENERAL SUPPORT |
| AMERICAN UNIVERSITY OF PARIS | PARIS, N/ | $1,000 | 2025 | GENERAL SUPPORT |
| JUPITER ISLAND ARTS COUNCIL | JUPITER, FL | $1,000 | 2025 | GENERAL SUPPORT |
| HSS FOUNDATION (HOSPITAL FOR SPECIAL SURGERY - BIKE HSS) | NEW YORK, NY | $1,000 | 2025 | GENERAL SUPPORT |
| GUARDIANS OF MARTIN COUNTY | HOBE SOUND, FL | $1,000 | 2025 | GENERAL SUPPORT |
| MARINA ORTH FOUNDATION | WASHINGTON, DC | $1,000 | 2025 | GENERAL SUPPORT |
| CHAPIN SCHOOL | NEW YORK, NY | $300 | 2025 | GENERAL SUPPORT |
| ST BERNARD'S SCHOOL | NEW YORK, NY | $200 | 2025 | GENERAL SUPPORT |
| BROOKS SCHOOL | NORTH ANDOVER, MA | $200 | 2025 | GENERAL SUPPORT |
| KING BAUDOUIN FOUNDATION USA | NEW YORK, NY | $105,000 | 2024 | GENERAL SUPPORT |
| ATLANTIC SALMON FOUNDATION | CALAIS, ME | $100,000 | 2024 | CONSERVATION FUNDS |
| NATIONAL SPORTING LIBRARY | MIDDLEBURG, VA | $78,000 | 2024 | GENERAL SUPPORT |
| CHRIST MEMORIAL CHAPEL | HOBE SOUND, FL | $50,000 | 2024 | GENERAL SUPPORT |
| SOUTHAMPTON HOSPITAL FOUNDATION | SOUTHAMPTON, NY | $30,000 | 2024 | GENERAL SUPPORT |
RUSH UNIVERSITY SYSTEM FOR HEALTH
$25,000GENERAL SUPPORT
JUPITER ISLAND ARTS COUNCIL
$5,000GENERAL SUPPORT
MARINA ORTH FOUNDATION
GENERAL SUPPORT
AMERICAN UNIVERSITY OF PARIS
$1,000GENERAL SUPPORT
IRISH GEORGIAN SOCIETY
$1,000GENERAL SUPPORT
ST ANDREW'S DUNE CHURCH
$200GENERAL SUPPORT
CHRIST MEMORIAL CHAPEL
$50,600GENERAL SUPPORT
ST ANDREW'S DUNE CHURCH
$10,100GENERAL SUPPORT
CONSERVATION FUND
$5,000GENERAL SUPPORT
ST JOHN'S ESPISCOPAL CHURCH
$5,000GENERAL SUPPORT
WEILL CORNELL MEDICAL COLLEGE
$2,000GENERAL SUPPORT
SSE ALUMNI USA INC (DBA AMERICAN FRIENDS OF SSE)
$2,000GENERAL SUPPORT
BREAKWATER SCHOOL
$2,000GENERAL SUPPORT
SOUTHAMPTON ASSOCIATION
$2,000GENERAL SUPPORT
JUPITER ISLAND GARDEN CLUB INC
$1,000GENERAL SUPPORT
COMPUTER INNOVATIONS FOR TODAY'S YOUTH
$1,000GENERAL SUPPORT
AMERICAN UNIVERSITY OF PARIS
$1,000GENERAL SUPPORT
JUPITER ISLAND ARTS COUNCIL
$1,000GENERAL SUPPORT
GUARDIANS OF MARTIN COUNTY
$1,000GENERAL SUPPORT
MARINA ORTH FOUNDATION
$1,000GENERAL SUPPORT
ST BERNARD'S SCHOOL
$200GENERAL SUPPORT
BROOKS SCHOOL
$200GENERAL SUPPORT
KING BAUDOUIN FOUNDATION USA
$105,000GENERAL SUPPORT
CHRIST MEMORIAL CHAPEL
$50,000GENERAL SUPPORT