The Mackesy Family Foundation concentrates its giving in a small number of large grants, with a strong emphasis on higher education philanthropy and investments in youth-serving programs. Major support to the William & Mary Foundation dominates its portfolio, while recurring grants to New York child welfare services and a significant gift to a national squash organization show interest in youth development through both social services and athletics. The foundation tends to fund a few trusted organizations repeatedly rather than many small, one-off grants.
Highly concentrated: very few grants but large dollar amounts, with repeat multi-grant relationships (notably William & Mary and Graham Windham) rather than dispersed small grants.
Mackesy Family Foundation’s largest recent gifts have gone to William & Mary Foundation, including $2,670,000 in 2024 and $1,343,000 in 2025 for general support. That pattern points to a funder that backs institutions with substantial, repeated operating support rather than spreading gifts broadly across many organizations. The foundation’s recent record also shows sustained commitments to youth-serving organizations in New York, including Graham Windham, which received multiple general-support grants in 2023, 2024, and 2025. Across the portfolio, grants are often repeated to the same recipients over several years, suggesting ongoing relationships with a small group of nonprofits. Beyond higher education and child welfare, the foundation has supported youth athletics through grants to United States Squash Racquetsassociation and US Squash. It has also made general-support grants to organizations such as Princeton University, The Rockefeller University, Robin Hood Foundation, and Lead Africa. The mix of recipients shows interest in university advancement, child welfare, and youth development, with general operating support as the dominant grant purpose. The foundation’s recent giving is concentrated in the United States and reaches both local New York nonprofits and institutions in other states.
In higher education, Mackesy Family Foundation gave $2,670,000 in 2024 and $1,343,000 in 2025 to William & Mary Foundation for general support, and also supported The College of William & Mary with $120,000 in 2023. That makes university advancement a clear part of its grantmaking. Child welfare is another repeated area. Graham Windham received $707,000 in 2023, $260,000 in 2024, and $633,000 in 2025, all for general support. The foundation also made $50,000 grants to Robin Hood Foundation in 2023, 2024, and 2025, indicating a recurring relationship with a New York-based social-services funder. Youth athletics appears through squash-related support: United States Squash Racquetsassociation received $500,000 in 2023 and $250,000 in 2024, while US Squash received $250,000 in 2025. Smaller grants to Grassroot Soccer and Impact Through Golf Foundation broaden the youth-development pattern.
Typical grants cluster around a median of $25,000, with a p25 of $7,500 and a p75 of $75,000. The distribution is highly skewed by a small number of very large awards, including multi-million-dollar support in the portfolio. Recurrence is a defining feature: several grantees appear across multiple years, including William & Mary Foundation, Graham Windham, Robin Hood Foundation, Lead Africa, and Mainsprings. The foundation’s portfolio is built entirely on grants rather than program-related investments, and it does not fund individuals. Grant purposes in the recent record are consistently listed as general support, indicating flexible operating support rather than project-specific awards.
$2.9M
$22.7M
$1.9M
$3.5M
Most grants fall between $8K and $75K, with a median of $25K.
25th Percentile
$8K
Median
$25K
75th Percentile
$75K
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Notable grantees: William & Mary Foundation, Graham Windham, United States Squash Racquets Association
The foundation gives most often in New York, and 54% of its grants go to recipients in the HQ state. New York City-area recipients include Brooklyn’s Graham Windham and New York-based United States Squash Racquetsassociation, The Rockefeller University, Robin Hood Foundation, and Lead Africa. Outside New York, sizable recipients include Williamsburg, Virginia; Princeton, New Jersey; and Washington, DC. The recent record is entirely U.S.-based, with all grants going to recipients in the United States.
Its recent grants point to three recurring areas: higher education, child welfare, and youth athletics. William & Mary Foundation and The College of William & Mary represent the higher-education side, Graham Windham and Robin Hood Foundation show child-welfare and social-service support, and United States Squash Racquetsassociation and US Squash reflect youth sports philanthropy.
Yes. The foundation repeatedly supports several organizations across multiple years, including William & Mary Foundation in 2023, 2024, and 2025; Graham Windham in 2023, 2024, and 2025; and Robin Hood Foundation in 2023, 2024, and 2025. Lead Africa and Mainsprings also appear in more than one year.
The typical grant size is $25,000 at the median. The middle range runs from $7,500 at the 25th percentile to $75,000 at the 75th percentile, while the recent record also includes much larger operating gifts in the hundreds of thousands and millions.
New York is the top state by grant count, and 54% of grants go to recipients in the HQ state. Recent New York recipients include Brooklyn’s Graham Windham and New York-based The Rockefeller University, Robin Hood Foundation, Lead Africa, and United States Squash Racquetsassociation.
2025
Source: IRS Form 990-PF, fiscal year 2025.
Most recent grants reported to the IRS.
| Recipient | Location | Amount | Year | Purpose |
|---|---|---|---|---|
| WILLIAM & MARY FOUNDATION | WILLIAMSBURG, VA | $1,343,000 | 2025 | GENERAL SUPPORT |
| GRAHAM WINDHAM | BROOKLYN, NY | $633,000 | 2025 | GENERAL SUPPORT |
| US SQUASH | PHILADELPHIA, PA | $250,000 | 2025 | GENERAL SUPPORT |
| PRINCETON UNIVERSITY | PRINCETON, NJ | $170,000 | 2025 | GENERAL SUPPORT |
| THE ROCKEFELLER UNIVERSITY | NEW YORK, NY | $125,000 | 2025 | GENERAL SUPPORT |
| IMPACT THROUGH GOLF FOUNDATION | LA QUINTA, CA | $90,000 | 2025 | GENERAL SUPPORT |
| DISCOVERY LAND COMPANY FOUNDATION | BEVERLY HILLS, CA | $60,000 | 2025 | GENERAL SUPPORT |
| ROBIN HOOD FOUNDATION | NEW YORK, NY | $50,000 | 2025 | GENERAL SUPPORT |
| LEAD AFRICA | NEW YORK, NY | $50,000 | 2025 | GENERAL SUPPORT |
| MAINSPRINGS | TULSA, OK | $25,000 | 2025 | GENERAL SUPPORT |
| GRASSROOT SOCCER | HANOVER, NH | $21,250 | 2025 | GENERAL SUPPORT |
| LAKE WARAMAUG TASK FORCE | WARREN, CT | $10,000 | 2025 | GENERAL SUPPORT |
| AMERICAN FOUNDATION FOR SUICIDE PREVENTION | NEW YORK, NY | $10,000 | 2025 | GENERAL SUPPORT |
| DESTINATION COLLEGE | BRONXVILLE, NY | $10,000 | 2025 | GENERAL SUPPORT |
| SQUASH AND EDUCATION ALLIANCE | NEW YORK, NY | $5,000 | 2025 | GENERAL SUPPORT |
| BREAKTHROUGH T1D | NEW YORK, NY | $5,000 | 2025 | GENERAL SUPPORT |
| GOODWILL INDUSTRIES INTERNATIONAL INC | ROCKVILLE, MD | $2,500 | 2025 | GENERAL SUPPORT |
| BLACK PLAYERS FOR CHANGE | CHICAGO, IL | $1,000 | 2025 | GENERAL SUPPORT |
| WILLIAM & MARY FOUNDATION | WILLIAMSBURG, VA | $2,670,000 | 2024 | GENERAL SUPPORT |
| GRAHAM WINDHAM | BROOKLYN, NY | $260,000 | 2024 | GENERAL SUPPORT |
| UNITED STATES SQUASH RACQUETSASSOCIATION | PHILADELPHIA, PA | $250,000 | 2024 | GENERAL SUPPORT |
| PRINCETON UNIVERSITY | PRINCETON, NJ | $80,121 | 2024 | GENERAL SUPPORT |
| THE ROCKEFELLER UNIVERSITY | NEW YORK, NY | $75,000 | 2024 | GENERAL SUPPORT |
| ROBIN HOOD FOUNDATION | NEW YORK, NY | $50,000 | 2024 | GENERAL SUPPORT |
| LEAD AFRICA | NEW YORK, NY | $25,000 | 2024 | GENERAL SUPPORT |
| MAINSPRINGS THE JANADA L BATCHELOR FOUNDATION FOR CHILDREN | TULSA, OK | $25,000 | 2024 | GENERAL SUPPORT |
| LAKE WARAMAUG TASK FORCE | WARREN, CT | $20,000 | 2024 | GENERAL SUPPORT |
| UNITED STATES SOCCER FOUNDATION INC | WASHINGTON, DC | $10,000 | 2024 | GENERAL SUPPORT |
| AMERICAN FOUNDATION FOR SUICIDE PREVENTION | NEW YORK, NY | $10,000 | 2024 | GENERAL SUPPORT |
| VILLAGE OF BRONXVILLE | BRONXVILLE, NY | $10,000 | 2024 | GENERAL SUPPORT |
| CITYSQUASH | BRONX, NY | $10,000 | 2024 | GENERAL SUPPORT |
| THE ONE LOVE FOUNDATION | BRONXVILLE, NY | $5,000 | 2024 | GENERAL SUPPORT |
| LOST TREE VILLAGE CHARITABLE | NORTH PALM BEACH, FL | $5,000 | 2024 | GENERAL SUPPORT |
| DESTINATION COLLEGE | BRONXVILLE, NY | $5,000 | 2024 | GENERAL SUPPORT |
| SQUASH AND EDUCATION ALLIANCE | NEW YORK, NY | $5,000 | 2024 | GENERAL SUPPORT |
| THE PICTURE HOUSE | PELHAM, NY | $2,200 | 2024 | GENERAL SUPPORT |
| WILLIAM & MARY FOUNDATION | WILLIAMSBURG, VA | $2,160,000 | 2023 | GENERAL SUPPORT |
| GRAHAM WINDHAM | BROOKLYN, NY | $707,000 | 2023 | GENERAL SUPPORT |
| UNITED STATES SQUASH RACQUETSASSOCIATION | NEW YORK, NY | $500,000 | 2023 | GENERAL SUPPORT |
| THE COLLEGE OF WILLIAM & MARY | WILLIAMSBURG, VA | $120,000 | 2023 | GENERAL SUPPORT |
| THE ROCKEFELLER UNIVERSITY | NEW YORK, NY | $75,000 | 2023 | GENERAL SUPPORT |
| DISCOVERY LAND COMPANY FOUNDATION | BEVERLY HILLS, CA | $55,000 | 2023 | GENERAL SUPPORT |
| ROBIN HOOD FOUNDATION | NEW YORK, NY | $50,000 | 2023 | GENERAL SUPPORT |
| ASPEN INSTITUTE | WASHINGTON, DC | $25,000 | 2023 | GENERAL SUPPORT |
| LEAD AFRICA | NEW YORK, NY | $25,000 | 2023 | GENERAL SUPPORT |
| MAINSPRINGS THE JANADA L BATCHELOR FOUNDATION FOR CHILDREN | TULSA, OK | $25,000 | 2023 | GENERAL SUPPORT |
| VIRGINIA ATHLETICS FOUNDATION | CHARLOTTESVILLE, VA | $16,420 | 2023 | GENERAL SUPPORT |
| LAKE WARAMAUG TASK FORCE | WARREN, CT | $10,000 | 2023 | GENERAL SUPPORT |
| HELP US GROW READING PROGRAM | LOUISVILLE, KY | $10,000 | 2023 | GENERAL SUPPORT |
| UNITED STATES SOCCER FOUNDATION INC | WASHINGTON, DC | $5,000 | 2023 | GENERAL SUPPORT |
WILLIAM & MARY FOUNDATION
$1,343,000GENERAL SUPPORT
US SQUASH
$250,000GENERAL SUPPORT
GENERAL SUPPORT
MAINSPRINGS
$25,000GENERAL SUPPORT
LAKE WARAMAUG TASK FORCE
$10,000GENERAL SUPPORT
DESTINATION COLLEGE
$10,000GENERAL SUPPORT
BLACK PLAYERS FOR CHANGE
$1,000GENERAL SUPPORT
WILLIAM & MARY FOUNDATION
$2,670,000GENERAL SUPPORT
UNITED STATES SQUASH RACQUETSASSOCIATION
$250,000GENERAL SUPPORT
MAINSPRINGS THE JANADA L BATCHELOR FOUNDATION FOR CHILDREN
$25,000GENERAL SUPPORT
LAKE WARAMAUG TASK FORCE
$20,000GENERAL SUPPORT
VILLAGE OF BRONXVILLE
$10,000GENERAL SUPPORT
LOST TREE VILLAGE CHARITABLE
$5,000GENERAL SUPPORT
DESTINATION COLLEGE
$5,000GENERAL SUPPORT
THE PICTURE HOUSE
$2,200GENERAL SUPPORT
UNITED STATES SQUASH RACQUETSASSOCIATION
$500,000GENERAL SUPPORT
THE COLLEGE OF WILLIAM & MARY
$120,000GENERAL SUPPORT
MAINSPRINGS THE JANADA L BATCHELOR FOUNDATION FOR CHILDREN
$25,000GENERAL SUPPORT
LAKE WARAMAUG TASK FORCE
$10,000GENERAL SUPPORT
HELP US GROW READING PROGRAM
$10,000GENERAL SUPPORT