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Mackesy Family Foundation at a glance

· Private foundation

Mackesy Family Foundation

Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$2.9M
Granted FY2024still arriving
18
Grants FY2024still arriving
10
States reached
$1.3M
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0197% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2024.

Education$11MHuman Services$2.2MRecreation & Sports$1.7MPhilanthropy$462kHealth$172kInternational$100kEnvironment$66kReligion$25kOther$0
02FY2024 · 18 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k4 grants · $14k
  • $10k–50k5 grants · $76k
  • $50k–250k6 grants · $545k
  • $250k+3 grants · $2.2M
$50,000
Median grant
10
States reached
$23M
Total assets
Largest grants
RecipientAmount
WILLIAM & MARY FOUNDATION$1,343,000
GRAHAM WINDHAM$633,000
US SQUASH$250,000
PRINCETON UNIVERSITY$170,000
THE ROCKEFELLER UNIVERSITY$125,000
IMPACT THROUGH GOLF FOUNDATION$90,000
DISCOVERY LAND COMPANY FOUNDATION$60,000
LEAD AFRICA$50,000
ROBIN HOOD FOUNDATION$50,000
MAINSPRINGS$25,000
GRASSROOT SOCCER$21,250
DESTINATION COLLEGE$10,000
AMERICAN FOUNDATION FOR SUICIDE PREVENTION$10,000
LAKE WARAMAUG TASK FORCE$10,000
BREAKTHROUGH T1D$5,000
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its human-services grants (FY19–24, $2.2M) land where the poverty rate runs at 20%, against an area that typically sits at 12%. 99% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 12%GRAHAM WINDHAM: $707k → 20%SQUASH HAVEN: $500 → 12%GRAHAM WINDHAM: $633k → 20%GRAHAM WINDHAM: $460k → 20%GRAHAM WINDHAM: $260k → 20%DESTINATION COLLEGE: $10k → 9%GRAHAM WINDHAM: $120k → 20%DESTINATION COLLEGE: $5k → 9%DESTINATION COLLEGE: $5k → 9%DESTINATION COLLEGE: $5k → 9%DESTINATION COLLEGE: $5k → 9%BUNDLES OF JOY: $500 → 9%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.

Which US states its grants reach

NH
IL
NY
PA
NJ
CT
CA
KY
VA
MD
DC
OK
FL
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

92%of every dollar goes to organizations it has funded before.
$15M · 20 repeat orgs$1.3M to everyone else

Grantees it renews have grown median revenue +29% since the first grant, against -1% for those funded once.

20 repeat relationships: 11 still active in FY2024, 9 since wound down; 7 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

20
28

Total granted

$15M
$955k

Median revenue growth · since first grant

+29%
-1%

Still filing today

95%
54%

New vs renewed · share of each year

In FY2024, 86% of grant dollars renewed an existing relationship; $395k went to new ones.

50%100%’19’20’21’22’23’24
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’19’20’21’22’23’24
EducationRecreation & SportsHuman ServicesPhilanthropyHealthEnvironmentOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). The earliest year is left-censored: relationships that predate the data read as new. Theme is the grantee’s IRS cause.

Backed again, and grew

  • WM
    William & Mary Foundation
    5× · 2019–2024 · $7.4M · revenue +129%
  • GW
    GRAHAM WINDHAM
    5× · 2019–2024 · $2.2M · revenue +16%
  • BS
    BRUNSWICK SCHOOL INC
    3× · 2019–2021 · $1.4M · revenue +41%

Funded once

  • GW
    GRAHAM WINDHAM OPERATING ACCOUNT
    one grant, 2021 · $250k
  • US
    UNITED STATES SQUASH RACQUETS
    one grant, 2020 · $235k
  • OH
    OUR HOUSE FOUNDATION INC
    one grant, 2020 · $100k · revenue +24%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
University of New Haven

The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…

Education
2
Massachusetts Institute of Technology

The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.

Education
3
Brooklyn Law School

To provide students with the knowledge, skills, ethical values needed for a career in law.

Education
4
The Baruch College Fund

The baruch college fund is an organization engaged in generating, encouraging and promoting the educational welfare of the students of the bernard m. baruch college of the city university of new york.

Education
5
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
6
Long Island University

To provide excellence and access in private higher education to those who seek to expand their knowledge and prepare themselves for meaningful, educated lives and for service to their communities and the world.

—
7
Manhattanville University

To educate students to be ethical and socially responsible leaders in a global community.

Education
8
Furman University

The primary mission of furman as a liberal arts institution is to provide a distinctive education in fine arts, humanities, social sciences, mathematics and the sciences, as well as selected professional disciplines.

Education
9
Fordham University

Fordham university, the jesuit university of new york, is committed to the discovery of wisdom and the transmission of learning, through research and through education of the highest quality. for more information, see schedule o.

Education
10
Mitchell College

Mitchell college educates students through a highly individualized educational approach that brings forward each student's potential, reveals their strengths, and fosters personal growth.

Education
11
Stony Brook Internists University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
12
Quinnipiac University

To build the university of the future with a strategy propelling us from our storied past toward an ambitious, inclusive & innovative future by preparing graduates as enlightened global citizens equipped for the challenges & opportunities…

Education
How this is measured
The grantee most central to the portfolio’s shape is United States Soccer Foundation Inc; the most unlike its peers is Bronxville Historical Conservancy Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
04the grantee network

39 grantees tracked through their own filings, 2017–2025.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 39 of the 56 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
6
Early backer (in before they grew)
39/39
Grantees still filing
24/39
Grew since first funded

Where the money sits, by cause and then by grantee

William & Mary Foundation: $7,425,202 · EducationWilliam & Mary FoundationBRUNSWICK SCHOOL INC: $1,400,000 · EducationBRUNSWICK SCHOOL INCTHE HOTCHKISS SCHOOL: $813,219 · EducationTHE HOTCHKISS SCHOOLTHE ROCKEFELLER UNIVERSITY: $450,000 · Education+6 more: $461,541 · EducationGRAHAM WINDHAM: $2,180,000 · Human ServicesGRAHAM WINDHAM+3 more: $31,000 · Human ServicesTHE COLLEGE OF WILLIAM AND MARY: $475,947 · OtherTHE COLLEGE…US SQUASH: $250,000 · OtherUS SQUASHGRAHAM WINDHAM OPERATING ACCOUNT: $250,000 · OtherGRAHAM WIND…UNITED STATES SQUASH RACQUETS: $235,000 · OtherUNITED STAT…OUR HOUSE FOUNDATION INC: $100,000 · OtherOUR HOUSE F…VIRGINIA ATHLETICS FOUNDATION MENS: $100,000 · OtherVIRGINIA AT…THE COLLEGE OF WILLIAM & MARY NOTE LORD BOTETOURT AUCTION: $99,300 · OtherTHE COLLEGE…+20 more: $186,150 · Other+20 moreUNITED STATES SQUASH RACQUETS ASSOC INC: $925,000 · Recreation & SportsSQUASH AND EDUCATION ALLIANCE INC: $60,000 · Recreation & Sports+5 more: $78,750 · Recreation & SportsTHE DISCOVERY LAND COMPANY FOUNDATION: $215,000 · PhilanthropyROBIN HOOD FOUNDATION: $150,000 · PhilanthropyIMPACT THROUGH GOLF FOUNDATION: $90,000 · Philanthropy+1 more: $500 · PhilanthropyJBFC INC DBA MAINSPRINGSJBFC: $100,000 · InternationalLAKE WARAMAUG TASK FORCE INC: $55,000 · EnvironmentSTEEP ROCK ASSOCIATION INC: $10,000 · Environment+1 more: $1,000 · Environment
Education$10,549,962Human Services$2,211,000Other$1,696,397Recreation & Sports$1,063,750Philanthropy$455,500International$100,000Environment$66,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetWilliam & Mary Foundation: $7,425,202 over 5y, 6.5% of budgetGRAHAM WINDHAM: $2,180,000 over 5y, 1.2% of budgetBRUNSWICK SCHOOL INC: $1,400,000 over 3y, 1.0% of budgetUNITED STATES SQUASH RACQUETS ASSOC INC: $925,000 over 4y, 6.3% of budgetTHE HOTCHKISS SCHOOL: $813,219 over 3y, 0.4% of budgetTHE ROCKEFELLER UNIVERSITY: $450,000 over 5y, 0.0% of budgetThe Trustees of Princeton University: $250,121 over 2y, 0.0% of budgetTHE DISCOVERY LAND COMPANY FOUNDATION: $215,000 over 3y, 2.2% of budgetROBIN HOOD FOUNDATION: $150,000 over 3y, 0.0% of budgetLEAD Africa: $135,000 over 5y, 4.6% of budgetOUR HOUSE FOUNDATION INC: $100,000 over 1y, 8.3% of budgetJBFC INC DBA MAINSPRINGSJBFC: $100,000 over 4y, 2.8% of budgetIMPACT THROUGH GOLF FOUNDATION: $90,000 over 1y, 0.7% of budgetSQUASH AND EDUCATION ALLIANCE INC: $60,000 over 4y, 0.9% of budgetLAKE WARAMAUG TASK FORCE INC: $55,000 over 4y, 4.3% of budgetVIRGINIA STUDENT AID FOUNDATION INC: $41,420 over 2y, 0.1% of budgetUNITED STATES SOCCER FOUNDATION INC: $30,000 over 5y, 0.1% of budgetDESTINATION COLLEGE: $30,000 over 5y, 2.6% of budgetTHE ASPEN INSTITUTE INC: $25,000 over 1y, 0.0% of budgetUNIVERSITY OF SOUTHERN CALIFORNIA: $25,000 over 1y, 0.0% of budgetGRASSROOT SOCCER INC: $21,250 over 1y, 0.2% of budgetAMERICAN FOUNDATION FOR SUICIDE PREVENTION: $20,000 over 2y, 0.0% of budgetSTREETSQUASH INC: $15,000 over 1y, 0.3% of budgetSTEEP ROCK ASSOCIATION INC: $10,000 over 1y, 0.3% of budgetCity Squash Inc: $10,000 over 1y, 0.1% of budgetTHE ONE LOVE FOUNDATION IN HONOR OF YEARDLEY LOVE INC: $7,500 over 2y, 0.1% of budgetBREAKTHROUGH T1D: $5,000 over 1y, 0.0% of budgetINNER CITY SCHOLARSHIP FUND INC: $5,000 over 1y, 0.0% of budgetTHE PICTURE HOUSE REGIONAL FILM CENTER INC: $4,400 over 2y, 0.1% of budgetGOODWILL INDUSTRIES INTERNATIONAL INC: $2,500 over 1y, 0.0% of budgetLOCKS OF LOVE INC: $1,250 over 1y, 0.2% of budgetKENT LAND TRUST INC: $1,000 over 1y, 0.3% of budgetCONCORDIA COLLEGE: $500 over 1y, 0.0% of budgetSQUASH HAVEN INC: $500 over 1y, 0.1% of budgetWASHINGTON COMMUNITY FUND INC: $500 over 1y, 0.2% of budgetBUNDLES OF JOY NEW YORK INC: $500 over 1y, 0.1% of budgetBronxville Historical Conservancy Inc: $500 over 1y, 0.3% of budgetLAWRENCE COMMUNITY HEALTH SERVICES: $500 over 1y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

The Goldman Sachs Cha…The Ayco Charitable F…First Eagle Investmen…Andrew M Paul Family …The Nagle Family Foun…Marilynn and John Hil…Steven a and Marianne…Viking Global Foundat…Jewish Communal FundEsmond Nissim Foundat…The Kestrel FoundationFairfield County's Co…
The Goldman Sachs Charitable Gift FundNY26.6× affinity12 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Goldman Sachs Charitable Gift Fund · The Ayco Charitable Foundation · First Eagle Investments Foundation · Andrew M Paul Family Foundation · The Nagle Family Foundation · Marilynn and John Hill Foundation Inc · Steven a and Marianne M Mills Charitable Foundation Inc · Viking Global Foundation Inc · Jewish Communal Fund · Esmond Nissim Foundation Inc Co Bosworth Gray & Fuller Esq · The Kestrel Foundation · Fairfield County's Community Foundation Inc

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Mackesy Family Foundation funds: left to right is the share of its income from government, bottom to top the share from Mackesy Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 90%1%3%6%10%funder's share of their income ↑0%13%25%38%50%share of the org’s income from government →median 19%
  • Goodwill Industries International Inc: 35% of income from government
  • Steep Rock Association Inc: 19% of income from government
  • The Trustees of Princeton University: 11% of income from government
  • Squash Haven Inc: 4% of income from government
no gov moneyreceives it· size = income
9get no government money at all
3report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–50%
typical government reliance, FY20–25
How this is measured
Government income is each org’s traced federal awards (USASpending grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that a grant caused the public funding. Coverage is precision-first, a floor rather than a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12 to 24 months.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Mackesy Family Foundation?

Find your warmest path to Mackesy Family Foundation through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 56 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Mackesy Family’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home