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New York · 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 FY2024(still arriving)
18
Grants FY2024
18
Organizations funded FY2023
28%
First-time grantees FY2023
Read the full brief
Median grant, FY2024
$50,000
Largest grant, FY2024
$1,343,000
Organizations funded a year
13 to 25
FY2019 to FY2023
States reached, FY2024
10
Total assets, FY2024
$23M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2023, 28% of the organizations Mackesy Family Foundation funded were first-time grantees, receiving 3% of its grant dollars.

New vs renewed · share of each year

In FY2023, 97% of grant dollars renewed an existing relationship; $115k went to new ones.

50%100%’20’21’22’23
RenewedFirst-time

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

’20’21’22’23
EducationHuman ServicesHealthPhilanthropyEnvironmentArts & CultureOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2024still arriving18$2.9M39%
FY202318$3.5M28%
FY202217$3.8M29%
FY202113$2.7M31%
FY202025$2.0M76%
FY201915$1.2Mn/a
97% 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

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

NH
IL
NY
PA
NJ
CT
CA
KY
VA
MD
DC
OK
FL

Top grantees

Largest recipients by total granted, FY2019 to FY2024, and the share of each one’s budget the grants supplied at peak.

Show all 39 grantees
All grantees of Mackesy Family Foundation by total granted
GranteeTotal grantedYearsShare of their budget
William & Mary Foundation$7,425,20257%
Graham Windham$2,180,00051%
Brunswick School Inc$1,400,00031%
United States Squash Racquets Assoc Inc$925,00046%
The Hotchkiss School$813,21930%
The Rockefeller University$450,00050%
The Trustees of Princeton University$250,12120%
The Discovery Land Company Foundation$215,00032%
Robin Hood Foundation$150,00030%
LEAD Africa$135,00055%
Our House Foundation Inc$100,00018%
Jbfc Inc Dba Mainspringsjbfc$100,00043%
Impact Through Golf Foundation$90,00011%
Squash and Education Alliance Inc$60,00041%
Lake Waramaug Task Force Inc$55,00044%
Virginia Student Aid Foundation Inc$41,42020%
United States Soccer Foundation Inc$30,00050%
Destination College$30,00053%
The Aspen Institute Inc$25,00010%
Grassroot Soccer Inc$21,25010%
American Foundation for Suicide Prevention$20,00020%
Streetsquash Inc$15,00010%
Steep Rock Association Inc$10,00010%
City Squash Inc$10,00010%
The One Love Foundation in Honor of Yeardley Love Inc$7,50020%
Breakthrough T1d$5,00010%
Inner City Scholarship Fund Inc$5,00010%
The Picture House Regional Film Center Inc$4,40020%
Goodwill Industries International Inc$2,50010%
Blue Ribbon Foundation Inc$2,5001n/a
Locks of Love Inc$1,25010%
Concordia College$1,0001n/a
Kent Land Trust Inc$1,00010%
Concordia College$50010%
Squash Haven Inc$50010%
Washington Community Fund Inc$50010%
Bundles of Joy New York Inc$50010%
Bronxville Historical Conservancy Inc$50010%
Lawrence Community Health Services$50010%

What it could do for these grantees

Plus 16 recipients with no EIN on record ($1.5M), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Mackesy Family Foundation supplied at peak.

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 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

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 37.

Nonprofits that may fit its grantmaking

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 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.

Compare Mackesy Family Foundation with peer funders

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.

About Mackesy Family Foundation

How much does Mackesy Family Foundation give?
Mackesy Family Foundation reported 18 grants totaling $2,860,750 in its FY2024 IRS filing. It funded between 13 and 25 organizations a year over FY2019 to FY2023.
What does Mackesy Family Foundation fund?
By grant dollars over FY2019 to FY2024, its largest causes are Education (69%), Human Services (14%), Recreation & Sports (10%).
Who are Mackesy Family Foundation's largest grantees?
By total granted over FY2019 to FY2024: William & Mary Foundation ($7.4M), Graham Windham ($2.2M), Brunswick School Inc ($1.4M).
Does Mackesy Family Foundation fund new organizations?
In FY2023, 28% of the organizations it funded were first-time grantees.
Does Mackesy Family Foundation accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as Mackesy Family Foundation?
Its strongest co-funders, measured against what their size predicts, include The Goldman Sachs Charitable Gift Fund, The Ayco Charitable Foundation, First Eagle Investments Foundation.
Where is Mackesy Family Foundation based?
Mackesy Family Foundation is based in NY.

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

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