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The Kat Foundation at a glance

· Private foundation

The Kat 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.

$857k
Granted FY2025still arriving
27
Grants FY2025still arriving
7
States reached
$250k
Largest
01What it fundsRead
02Its granteesRead
03Its fieldRead
04Through PlinthRead
01What it funds
0192% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2019 to 2025.

Education$1.3MPhilanthropy$899kPublic Benefit$477kHealth$357kInternational$95kHuman Services$58kArts & Culture$52kSocial Science$52kOther$0
02FY2025 · 27 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k15 grants · $36k
  • $10k–50k5 grants · $90k
  • $50k–250k6 grants · $480k
  • $250k+1 grant · $250k
$5,000
Median grant
7
States reached
$16M
Total assets
Largest grants
RecipientAmount
Partnership for Public Service$250,000
Wellde Family Charitable Giving Fund$155,000
Parker Institute for Cancer Immunotherapy$100,000
Council on Foreign Relations$75,000
University of Richmond$50,000
University of Richmond$50,000
University of Richmond$50,000
George Washington University$25,000
Beat the Streets Wrestling Inc$20,000
Georgetown University$15,000
Duke University$15,000
Spence School$15,000
Council on Foreign Relations$5,810
Trustees of Princeton University$5,000
Hampton Library in Bridgehampton Inc$5,000
02Its grantees
repeat funding

Who it funds again

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

61%of every dollar goes to organizations it has funded before.
$1.8M · 20 repeat orgs$1.1M to everyone else

20 repeat relationships: 11 still active in FY2025, 9 since wound down; 9 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

20
32

Total granted

$1.8M
$845k

Median revenue growth · since first grant

+17%
+18%

Still filing today

70%
50%

New vs renewed · share of each year

In FY2025, 64% of grant dollars renewed an existing relationship; $304k went to new ones.

50%100%’20’22’23’24’25
RenewedFirst-time

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

’20’22’23’24’25
EducationInternationalAnimalsRecreation & SportsHealthEmploymentOther
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

  • PF
    PARTNERSHIP FOR PUBLIC SERVICE INC
    4× · 2020–2025 · $466k · revenue +10%
  • TG
    The George Washington University
    5× · 2020–2025 · $428k · revenue +22%
  • UO
    UNIVERSITY OF RICHMOND
    5× · 2020–2025 · $416k · revenue +17%

Funded once

  • WF
    Wellde Family Charitable Fund
    one grant, 2024 · $265k
  • LH
    LSU HEALTH SCIENCES FOUNDATION IN SHREVEPORT
    one grant, 2023 · $250k · revenue -26%
  • TS
    The Spence School, New York, NY
    one grant, 2022 · $156k
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.

03Its 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
Boston Architectural College

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

—
2
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
3
Northeast College of Health Sciences

Northeast college of health sciences (the college) is committed to academic excellence, leadership, and professional best practices in the health sciences.

Education
4
The Trustees of Princeton University

Research, education and general - princeton university is a private not-for-profit, non-sectarian institution of higher learning with approximately 5,700 undergraduate and 3,300 graduate students. 2,500 students graduated in the 2024-2025…

Education
5
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
6
United States Naval Institute

Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.

—
7
Manhattanville University

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

Education
8
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
9
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
10
Stony Brook Surgical Associates University Faculty Practice Corporation

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

Health
11
Brooklyn Law School

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

Education
12
President and Fellows of Harvard College

Undergraduate, graduate, and professional education and research across a broad array of academic domains.

Education
How this is measured
The grantee most central to the portfolio’s shape is Queens College Foundation Inc; the most unlike its peers is Bridgehampton Community House Association Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
03the 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 64 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)
3
Early backer (in before they grew)
39/39
Grantees still filing
28/39
Grew since first funded

Where the money sits, by cause and then by grantee

The George Washington University: $427,500 · EducationThe George Washington UniversityUNIVERSITY OF RICHMOND: $416,000 · EducationUNIVERSITY OF RICHMONDRANDOLPH-MACON COLLEGE: $215,000 · EducationRANDOLPH-MACON COLLEGEDUKE UNIVERSITY: $65,000 · EducationDUKE UNIVERSITYTHE SPENCE SCHOOL: $46,000 · Education+5 more: $48,550 · EducationWellde Family Charitable Fund: $265,000 · OtherWellde Family Charitable F…The Spence School, New York, NY: $155,925 · OtherThe Spence School, New Yor…Wellde Family Charitable Giving Fund: $155,000 · OtherWellde Family Charitable G…Council on Foreign Relations - Network for Good: $51,500 · OtherCouncil on Foreign Relatio…Up Giving Village Corporation: $50,000 · OtherUp Giving Village Corporat…+38 more: $135,357 · Other+38 moreDONOR ADVISED CHARITABLE GIVING INC: $375,000 · PhilanthropyDONOR ADVISED CHARIT…LSU HEALTH SCIENCES FOUNDATION IN SHREVEPORT: $250,000 · PhilanthropyLSU HEALTH SCIENCES …PARTNERSHIP FOR PUBLIC SERVICE INC: $466,250 · EmploymentPARTNERSHIP FOR…NETWORK FOR GOOD: $103,000 · Public Safety & Disaster+1 more: $1,000 · Public Safety & DisasterPARKER INSTITUTE FOR CANCER IMMUNOTHERAPY: $100,000 · Health+1 more: $2,060 · HealthCOUNCIL ON FOREIGN RELATIONS INC: $94,370 · International+3 more: $1,633 · International
Education$1,218,050Other$812,782Philanthropy$625,000Employment$466,250Public Safety & Disaster$104,000Health$102,060International$96,003

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

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetPARTNERSHIP FOR PUBLIC SERVICE INC: $466,250 over 4y, 0.9% of budgetThe George Washington University: $427,500 over 5y, 0.0% of budgetUNIVERSITY OF RICHMOND: $416,000 over 5y, 0.0% of budgetDONOR ADVISED CHARITABLE GIVING INC: $375,000 over 1y, 0.0% of budgetLSU HEALTH SCIENCES FOUNDATION IN SHREVEPORT: $250,000 over 1y, 1.3% of budgetRANDOLPH-MACON COLLEGE: $215,000 over 4y, 0.1% of budgetNETWORK FOR GOOD: $103,000 over 2y, 0.0% of budgetPARKER INSTITUTE FOR CANCER IMMUNOTHERAPY: $100,000 over 1y, 0.1% of budgetCOUNCIL ON FOREIGN RELATIONS INC: $94,370 over 3y, 0.1% of budgetDUKE UNIVERSITY: $65,000 over 2y, 0.0% of budgetTHE SPENCE SCHOOL: $46,000 over 2y, 0.0% of budgetTHE INSTITUTE OF CLASSICAL ARCHITECTURE AND ART INC: $25,000 over 1y, 0.7% of budgetGEORGETOWN UNIVERSITY: $15,000 over 1y, 0.0% of budgetTERRA COTTA GOLF CHARITIES INC: $10,400 over 4y, 3.1% of budgetEAST HAMPTON HISTORICAL SOCIETY INC: $10,000 over 1y, 1.0% of budgetWYCKOFF FAMILY YMCA: $8,000 over 2y, 0.0% of budgetFUND FOR PARK AVENUE NEW YORK INC: $4,000 over 5y, 0.1% of budgetNORTH SHORE ANIMAL LEAGUE AMERICA INC: $3,500 over 2y, 0.0% of budgetPATTY BAKER HUMANE SOCIETY NAPLES INC: $2,500 over 1y, 0.0% of budgetBRIDGEHAMPTON ASSOCIATION INC: $2,500 over 1y, 3.8% of budgetCHAMINADE DEVELOPMENT FUND INC: $2,500 over 1y, 0.0% of budgetFARM SANCTUARY INC: $2,300 over 3y, 0.0% of budgetTHE MOUNT SINAI HOSPITAL: $2,060 over 1y, 0.0% of budgetPAN-MASSACHUSETTS CHALLENGE INC: $2,052 over 2y, 0.0% of budgetBRIDGEHAMPTON VILLAGE IMPROVEMENT SOCIETY INC: $1,250 over 2y, 3.3% of budgetThe New York Public Library Astor Lenox and Tilden Foundations: $1,050 over 1y, 0.0% of budgetBRIDGEHAMPTON VOLUNTEER FIRE DEPARTMENT: $1,000 over 1y, 0.4% of budgetPHYSICIANS FOR HUMAN RIGHTS INC: $1,000 over 1y, 0.0% of budgetQUEENS COLLEGE FOUNDATION INC: $1,000 over 1y, 0.0% of budgetCOLLIER COMMUNITY FOUNDATION INC: $500 over 1y, 0.0% of budgetGIVE TO RESEARCH: $500 over 1y, 0.0% of budgetSMILE TRAIN INC: $500 over 1y, 0.0% of budgetEvelyn Alexander Wildlife Rescue Center Inc: $258 over 1y, 0.0% of budgetAMERICA'S CHARITIES: $250 over 1y, 0.0% of budgetBRIDGEHAMPTON COMMUNITY HOUSE ASSOCIATION INC: $250 over 1y, 0.3% of budgetACTION IN AFRICA INC: $105 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…Gs Donor Advised Phil…National Philanthropi…American Endowment Fo…The Pfizer Foundation…Vanguard Charitable E…Morgan Stanley Global…The Bank of America C…Donor Advised Charita…Fidelity Investments …American Online Givin…Amazonsmile Foundation
The Goldman Sachs Charitable Gift FundNY14.1× affinity5 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 · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · National Philanthropic Trust · American Endowment Foundation · The Pfizer Foundation Inc · Vanguard Charitable Endowment Program · Morgan Stanley Global Impact Funding Trust Inc · The Bank of America Charitable Foundation Inc · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · American Online Giving Foundation Inc · Amazonsmile 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.
04Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to The Kat Foundation?

Find your warmest path to The Kat 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 64 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

Play a game based on Kat’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