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Passfield Hall Foundation Inc at a glance

· Private foundation

Passfield Hall Foundation Inc

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.

$1.3M
Granted FY2025still arriving
18
Grants FY2025still arriving
6
States reached
$254k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0195% classified

What it funded, over time

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

Health$2.9MEducation$1.9MInternational$1.6MReligion$181kSocial Science$168kArts & Culture$119kCivil Rights$55kPhilanthropy$37kOther$0
02FY2025 · 18 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k6 grants · $26k
  • $10k–50k3 grants · $76k
  • $50k–250k8 grants · $934k
  • $250k+1 grant · $254k
$50,052
Median grant
6
States reached
$8.8M
Total assets
Largest grants
RecipientAmount
ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI$254,302
MEMORIAL SLOAN KETTERING CANCER CENTER$235,276
PROSTATE CANCER FOUNDATION$150,156
GEORGETOWN UNIVERSITY$148,662
AMERICAN FUND FOR LSE$140,403
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY$100,447
SAINT PETER FOR HUMANITY$58,800
INTERNATIONAL RESCUE COMMITTEE INC$50,285
COUNCIL ON FOREIGN RELATIONS$50,052
AMERICAN JEWISH COMMITTEE$25,817
NAVY SEAL FOUNDATION INC$25,364
LINCOLN CENTER FOR THE PERFORMING ARTS INC$25,247
TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA$9,841
NAACP LEGAL DEFENSE AND EDUCATION FUND INC$5,052
RUTGERS UNIVERSITY FOUNDATION$5,052
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:

Dollar for dollar, its grants (FY19–25) land where the poverty rate runs at 16%, against an area that typically sits at 10%. 91% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%OPENGROWTHORG: $27k → 7%THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $155k → 7%PROSTATE CANCER FOUNDATION: $150k → 14%MEMORIAL SLOAN KETTERING CANCER CENTER: $235k → 13%GEORGETOWN UNIVERSITY: $151k → 14%MT SINAI MEDICAL CENTER: $55k → 15%THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $100k → 7%AMERICAN FRIENDS OF MAGEN DAVID ADOM: $30k → 17%GEORGETOWN UNIVERSITY: $145k → 14%GEORGETOWN UNIVERSITY: $134k → 14%LELAND STANFORD JUNIOR UNIVERSITY - BOARD OF TRUSTEES: $100k → 8%AMERICAN JEWISH COMMITTEE: $26k → 17%GEORGETOWN UNIVERSITY: $149k → 14%GEORGETOWN UNIVERSITY: $125k → 14%GEORGETOWN UNIVERSITY: $95k → 14%GEORGETOWN UNIVERSITY: $50k → 14%THE HOSPITAL FOR SPECIAL SURGERY FUND INC: $50k → 17%AMERICAN FUND FOR LSE: $273k → 17%AMERICAN FUND FOR LSE: $226k → 17%AMERICAN FUND FOR LSE: $212k → 17%AMERICAN FUND FOR LSE: $134k → 17%AMERICAN FUND FOR LSE: $56k → 17%MEMORIAL SLOAN KETTERING CANCER CENTER: $235k → 17%MEMORIAL SLOAN KETTERING CANCER CENTER: $100k → 17%MEMORIAL SLOAN KETTERING CANCER CENTER: $100k → 17%MSKCC: $54k → 17%MSKCC: $52k → 17%COUNCIL ON FOREIGN RELATIONS: $50k → 17%COUNCIL ON FOREIGN RELATIONS: $50k → 17%COUNCIL OF FOREIGN RELATIONS: $50k → 17%COUNCIL ON FOREIGN RELATIONS: $50k → 17%COUNCIL ON FORIEGN RELATIONS: $50k → 17%AMERICAN FUND FOR LSE: $140k → 17%COUNCIL ON FORIEGN RELATIONS: $50k → 17%INTERNATIONAL RESCUE COMMITTEE INC: $50k → 17%INTERNATIONAL RESCUE COMMITTEE INC: $50k → 17%INTERNATIONAL RESCUE COMMITTEE INC: $50k → 17%INTERNATIONAL RESCUE COMMITTEE: $50k → 17%INTERNATIONAL RESCUE COMMITTEE: $50k → 17%SAINT PETER FOR HUMANITY: $59k → 17%MT SINAI MEDICAL CENTER: $393k → 17%MOUNT SINAI MEDICAL CENTER: $383k → 17%MOUNT SINAI MEDICAL CENTER: $265k → 17%ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $254k → 17%MOUNT SINAI MEDICAL CENTER: $251k → 17%MT SINAI MEDICAL CENTER: $168k → 17%MT SINAI MEDICAL CENTER: $121k → 17%MT SINAI MEDICAL CENTER: $112k → 17%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

NY
MA
PA
NJ
CT
CA
VA
DC
LA
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.

82%of every dollar goes to organizations it has funded before.
$5.3M · 19 repeat orgs$1.1M to everyone else

Grantees it renews have grown median revenue +12% since the first grant, against +9% for those funded once.

19 repeat relationships: 9 still active in FY2025, 10 since wound down; 7 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

19
29

Total granted

$5.3M
$600k

Median revenue growth · since first grant

+12%
+9%

Still filing today

58%
69%

New vs renewed · share of each year

In FY2025, 56% of grant dollars renewed an existing relationship; $520k went to new ones.

50%100%’19’20’21’22’23’24’25
RenewedFirst-time

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

’19’20’21’22’23’24’25
EducationInternationalPhilanthropyHealthCivil RightsArts & 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.

Backed again, and grew

  • TA
    THE AMERICAN FUND FOR LSE
    5× · 2020–2025 · $1.0M · revenue +21%
  • GEORGETOWN UNIVERSITY
    7× · 2019–2025 · $851k · revenue +35%
  • IR
    International Rescue Committee INC
    6× · 2019–2025 · $252k · revenue +67%

Funded once

  • LS
    LONDON SCHOOL OF ECONOMICS
    one grant, 2019 · $168k
  • LS
    LELAND STANFORD JUNIOR UNIVERSITY - BOARD OF TRUSTEES
    one grant, 2019 · $100k
  • TH
    The Hospital for Special Surgery Fund Inc
    one grant, 2024 · $50k · revenue 0%
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
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
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
President and Fellows of Harvard College

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

Education
4
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.

—
5
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
6
Manhattanville University

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

Education
7
Stony Brook Urology University Faculty Practice Corporation

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

Health
8
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
9
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
10
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
11
Neurology Associates of Stony Brook University Faculty Practice Corp

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

Health
12
Lehigh University

The university's goal in the coming decade is to advance learning through the integration of teaching, research and service to others. the core of this goal is to prepare graduates to engage with the world and lead lives of meaning. to do…

Education
How this is measured
The grantee most central to the portfolio’s shape is Naacp Legal Defense & Educ Fund Inc; the most unlike its peers is International Rescue Committee 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 57 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.

1
Load-bearing (≥25% of a budget)
4
Early backer (in before they grew)
39/39
Grantees still filing
23/39
Grew since first funded

Where the money sits, by cause and then by grantee

MT SINAI MEDICAL CENTER: $867,923 · OtherMT SINAI MEDICAL CENTERMEMORIAL SLOAN KETTERING CANCER CENTER: $669,850 · OtherMEMORIAL SLOAN KETTERING CANCER CEN…LONDON SCHOOL OF ECONOMICS: $168,428 · OtherLONDON SCHOOL OF ECONOMICSMSKCC: $120,545 · OtherLELAND STANFORD JUNIOR UNIVERSITY - BOARD OF TRUSTEES: $100,454 · Other+21 more: $337,709 · Other+21 moreGEORGETOWN UNIVERSITY: $850,640 · EducationGEORGETOWN UNIVERSITYTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $770,998 · EducationTHE BOARD OF TRUSTEES OF THE LE…ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $254,302 · EducationICAHN SCHOOL OF MEDICINE AT MOU…+10 more: $113,544 · Education+10 moreTHE AMERICAN FUND FOR LSE: $1,040,927 · InternationalTHE AMERICAN FUND FOR LSECOUNCIL ON FOREIGN RELATIONS INC: $300,514 · InternationalCOUNCIL ON FOREIGN RELATIO…International Rescue Committee INC: $252,071 · InternationalInternational Rescue Commi…+3 more: $47,587 · InternationalTHE MOUNT SINAI MEDICAL CENTER: $899,567 · HealthTHE MOUNT SINAI…The Hospital for Special Surgery Fund Inc: $50,051 · Health+1 more: $500 · HealthPROSTATE CANCER FOUNDATION: $150,156 · PhilanthropyOpenGrowthorg: $27,000 · Philanthropy+1 more: $1,000 · PhilanthropyNAVY SEAL FOUNDATION INC: $50,524 · Arts & CultureLINCOLN CENTER FOR THE PERFORMING ARTS INC: $25,247 · Arts & CultureFRIENDS OF UNITED HATZALAH INC: $13,074 · Arts & CultureAMERICAN JEWISH COMMITTEE: $25,817 · Civil RightsNAACP LEGAL DEFENSE & EDUC FUND INC: $10,054 · Civil RightsREPRIEVE (US): $4,000 · Civil Rights
Other$2,264,909Education$1,989,484International$1,641,099Health$950,118Philanthropy$178,156Arts & Culture$88,845Civil Rights$39,871

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 budgetTHE AMERICAN FUND FOR LSE: $1,040,927 over 5y, 8.7% of budgetTHE MOUNT SINAI MEDICAL CENTER: $899,567 over 3y, 32% of budgetGEORGETOWN UNIVERSITY: $850,640 over 7y, 0.0% of budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $770,998 over 5y, 0.0% of budgetCOUNCIL ON FOREIGN RELATIONS INC: $300,514 over 6y, 0.1% of budgetInternational Rescue Committee INC: $252,071 over 6y, 0.0% of budgetNAVY SEAL FOUNDATION INC: $50,524 over 2y, 0.1% of budgetCOLLEGE TRACK: $50,121 over 2y, 0.1% of budgetThe Hospital for Special Surgery Fund Inc: $50,051 over 1y, 0.1% of budgetTEAM4TECH FOUNDATION: $30,119 over 1y, 1.4% of budgetAMERICAN FRIENDS OF MAGEN DAVID ADOM: $30,087 over 1y, 0.0% of budgetOpenGrowthorg: $27,000 over 1y, 4.5% of budgetLINCOLN CENTER FOR THE PERFORMING ARTS INC: $25,247 over 1y, 0.0% of budgetSEAL-NSW FAMILY FOUNDATION: $25,035 over 1y, 1.0% of budgetTHE ONE EAST SIXTIETH STREET HISTORICAL FOUNDATION: $19,938 over 6y, 0.5% of budgetTHE METROPOLITAN CLUB INC: $19,050 over 1y, 0.3% of budgetFRIENDS OF UNITED HATZALAH INC: $13,074 over 1y, 0.0% of budgetTRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA: $10,483 over 2y, 0.0% of budgetNAACP LEGAL DEFENSE & EDUC FUND INC: $10,054 over 2y, 0.0% of budgetNATURAL RESOURCES DEFENSE COUNCIL INC: $10,000 over 1y, 0.0% of budgetNE EMAN FOUNDATION USA: $10,000 over 1y, 0.1% of budgetARISE FOUNDATION AMERICA: $7,500 over 1y, 0.8% of budgetRUTGERS UNIVERSITY FOUNDATION: $5,052 over 1y, 0.0% of budgetUS COAST GUARD ACADEMY ALUMNI ASSOCIATION INC: $5,019 over 1y, 0.1% of budgetPOSITIVE COACHING ALLIANCE: $5,000 over 1y, 0.1% of budgetREPRIEVE (US): $4,000 over 2y, 0.3% of budgetHorace Mann School: $3,250 over 3y, 0.0% of budgetJAMES B LEE JR SCHOLARSHIP FUND IN HONOR OF JOSEPH A MCBRIDE: $2,500 over 1y, 0.4% of budgetSANDY HOOK PROMISE FOUNDATION: $1,018 over 1y, 0.0% of budgetTHE PALO ALTO COMMUNITY FUND: $1,000 over 1y, 0.1% of budgetNEW CLASSROOMS INNOVATION PARTNERS INC: $1,000 over 1y, 0.0% of budgetSOUTHAMPTON VILLAGE POLICE BENEVOLENT ASSOCIATION INC: $1,000 over 1y, 0.4% of budgetEAST PALO ALTO ACADEMY FOUNDATION: $1,000 over 1y, 0.1% of budgetALZHEIMER'S DISEASE AND RELATED DISORDERS NEW YORK CITY INC: $500 over 1y, 0.0% of budgetECUMENICAL HUNGER PROGRAM: $250 over 1y, 0.0% of budgetTHE OLYMPIC CLUB: $250 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.

Gs Donor Advised Phil…Silicon Valley Commun…National Philanthropi…Marin Community Found…The Goldman Sachs Cha…Morgan Stanley Global…Vanguard Charitable E…American Endowment Fo…Donor Advised Charita…American Online Givin…Fidelity Investments …Amazonsmile Foundation
Gs Donor Advised Philanthropy Fund for Wealth Management IncNY13.8× affinity7 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Silicon Valley Community Foundation · National Philanthropic Trust · Marin Community Foundation · The Goldman Sachs Charitable Gift Fund · Morgan Stanley Global Impact Funding Trust Inc · Vanguard Charitable Endowment Program · American Endowment Foundation · Donor Advised Charitable Giving Inc · American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund · 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.

How much its grantees rely on government

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

2024
’20’21’22’23’24’25
no gov · 30%3%10%23%40%funder's share of their income ↑0%23%45%68%90%share of the org’s income from government →median 0%
  • Sandy Hook Promise Foundation: 0% of income from government
  • Rutgers University Foundation: 0% of income from government
no gov moneyreceives it· size = income
3get 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 · 0–90%
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 Passfield Hall Foundation Inc?

Find your warmest path to Passfield Hall Foundation Inc 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 57 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 Passfield Hall’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