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Florida · Private foundation

The Zeckhauser Foundation

Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$453k
Granted FY2025(still arriving)
8
Grants FY2025
12
Organizations funded FY2024
25%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$30,347
Largest grant, FY2025
$200,000
Organizations funded a year
4 to 19
FY2018 to FY2024
States reached, FY2025
4
Total assets, FY2025
$5.9M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 25% of the organizations The Zeckhauser Foundation funded were first-time grantees, receiving 3% of its grant dollars.

New vs renewed · share of each year

In FY2024, 97% of grant dollars renewed an existing relationship; $6k went to new ones.

50%100%’18’19’20’21’22’23’24
RenewedFirst-time

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

’18’19’20’21’22’23’24
EducationArts & CultureEnvironmentHealthInternationalPublic BenefitOther
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
FY2025still arriving7$253k14%
FY202412$189k25%
FY20235$124k20%
FY202210$59k70%
FY202114$301k29%
FY20204$175k75%
FY201912$117k50%
FY201819$304k21%
99% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Philanthropy$1.6MEducation$763kHealth$659kScience & Tech$168kArts & Culture$68kEnvironment$25kFood & Nutrition$2kInternational$2kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

ME
VT
NY
MA
OH
PA
CT
RI
CA
KY
VA
TN
GA
TX
FL

Top grantees

Largest recipients by total granted, FY2017 to FY2025, and the share of each one’s budget the grants supplied at peak.

GranteeTotal grantedYearsShare of their budget
Mass General Brigham Incorporated$421,6665n/a
The Commonwealth School Inc$182,50041%
The Winsor School$147,01480%
Vanderbilt University$130,00030%
Bryn Mawr College$120,00040%
Westover School Inc$85,00050%
Groton School$35,00020%
Lyric Stage Company of Boston Inc$29,44021%
Dana-Farber Cancer Institute Inc$25,00010%
Belmont Day School Inc$15,35020%
Show all 38 grantees

What it could do for these grantees

Plus 21 recipients with no EIN on record ($461k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget The Zeckhauser Foundation supplied at peak.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetThe Commonwealth School Inc: $182,500 over 4y, 1.0% of budgetThe Winsor School: $147,014 over 8y, 0.1% of budgetVanderbilt University: $130,000 over 3y, 0.0% of budgetBryn Mawr College: $120,000 over 4y, 0.0% of budgetWestover School Inc: $85,000 over 5y, 0.2% of budgetGroton School: $35,000 over 2y, 0.0% of budgetLyric Stage Company of Boston Inc: $29,440 over 2y, 0.7% of budgetDana-Farber Cancer Institute Inc: $25,000 over 1y, 0.0% of budgetBelmont Day School Inc: $15,350 over 2y, 0.1% of budgetHobe Sound Nature Center Inc: $14,250 over 3y, 2.7% of budgetThe Conservation Fund a Nonprofit Corporation: $10,000 over 1y, 0.0% of budgetBeacon Communities Charitable Fund Inc: $7,000 over 1y, 0.9% of budgetRaymond F Kravis Center for the Performing Arts Inc: $5,000 over 1y, 0.0% of budgetAshoka: $2,000 over 1y, 0.0% of budgetMilton Academy: $2,000 over 1y, 0.0% of budgetCommunity Concepts Inc: $1,000 over 1y, 0.0% of budgetFresh Air Fund: $750 over 2y, 0.0% of budgetNorton Museum of Art Inc: $750 over 3y, 0.0% of budgetJupiter Island Medical Clinic Inc: $600 over 1y, 0.1% of budgetMuseum of Science: $515 over 3y, 0.0% of budgetPeabody Essex Museum Inc: $480 over 3y, 0.0% of budgetJupiter Island Garden Clubinc: $450 over 1y, 0.2% of budgetHillel Foundation of Cambridge Inc: $350 over 1y, 0.0% of budgetGaining Ground Inc: $280 over 1y, 0.1% of budgetBoston Harbor Now Inc: $250 over 1y, 0.0% of budgetHuntington Theatre Co Inc: $250 over 1y, 0.0% of budgetSports Humanitarian Group Inc: $200 over 2y, 0.0% of budget122 East 66th Street Foundation Inc: $200 over 2y, 0.0% of budgetTrustees of Boston University: $200 over 1y, 0.0% of budgetCode for America Labs Inc: $200 over 1y, 0.0% of budgetRar-Ma Inc: $150 over 1y, 0.0% of budgetJupiter Island Historical Society Inc: $150 over 1y, 0.3% of budgetThe Preservation Society of Newport County: $115 over 1y, 0.0% of budgetNative Plant Trust Inc: $75 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 34.

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.

Boston Foundation IncMA21.1× affinity9 shared granteesties to 8 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Boston Foundation Inc · Fidelity Foundation · John & Weezie Gates Charitable Trust · The David and Elizabeth Long Foundation · Nivin and Duncan Macmillan Foundation · St Clair Charitable Trust · Legatus Foundation · CMB Foundation · Ethel D Colket Foundation · Colket Family Foundation · Combined Jewish Philanthropies of Greater Boston Inc · Eastern Bank Foundation

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 The Zeckhauser Foundation with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to The Zeckhauser Foundation?

Find your warmest path to The Zeckhauser 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 The Zeckhauser Foundation

How much does The Zeckhauser Foundation give?
The Zeckhauser Foundation reported 8 grants totaling $452,897 in its FY2025 IRS filing. It funded between 4 and 19 organizations a year over FY2018 to FY2024.
What does The Zeckhauser Foundation fund?
By grant dollars over FY2017 to FY2025, its largest causes are Philanthropy (48%), Education (23%), Health (20%).
Who are The Zeckhauser Foundation's largest grantees?
By total granted over FY2017 to FY2025: Mass General Brigham Incorporated ($422k), The Commonwealth School Inc ($183k), The Winsor School ($147k).
Does The Zeckhauser Foundation fund new organizations?
In FY2024, 25% of the organizations it funded were first-time grantees.
Does The Zeckhauser 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 The Zeckhauser Foundation?
Its strongest co-funders, measured against what their size predicts, include Boston Foundation Inc, Fidelity Foundation, John & Weezie Gates Charitable Trust.
Where is The Zeckhauser Foundation based?
The Zeckhauser Foundation is based in FL.

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 61 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 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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