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Laurence and Carolyn Belfer Family Foundation C/O Belfer Management at a glance

· Private foundation

Laurence and Carolyn Belfer Family Foundation C/O Belfer Management

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.

$5k
Granted FY2025still arriving
1
Grants FY2025still arriving
1
States reached
$5k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0188% classified

What it funded, over time

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

Education$341kReligion$231kArts & Culture$135kHealth$36kEnvironment$32kSocial Science$26kAnimals$20kPhilanthropy$15kOther$0
02FY2025 · 1 grant

Where the money goes

Grants by size, and the largest recipients.

$5,000
Median grant
1
States reached
$36k
Total assets
Largest grants
RecipientAmount
CENTRAL SYNAGOGUE$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 (FY17–19, $8k) land where the poverty rate runs at 17%, against an area that typically sits at 13%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 13%JEWISH BOARD: $5k → 17%THE JEWISH BOARD: $500 → 17%BRAIN TUMOR FOUNDATION: $3k → 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
NJ
CT
CA
UT
NC
DC
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.

65%of every dollar goes to organizations it has funded before.
$596k · 16 repeat orgs$324k to everyone else

16 repeat relationships: 1 still active in FY2025, 15 since wound down.

How the two cohorts compare

Re-uppedFunded once

Organizations

16
27

Total granted

$596k
$324k

Median revenue growth · since first grant

+30%
+41%

Still filing today

75%
63%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

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

’17’18’19’20’21’22’23’24’25
Arts & CultureEducationInternationalPublic Safety & DisasterHuman ServicesReligionOther
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

  • TY
    THE YOUNG MEN'S AND YOUNG WOMEN'S HEBREW ASSOCIATION
    6× · 2018–2023 · $226k · revenue +40%
  • DUKE UNIVERSITY
    2× · 2020–2021 · $100k · revenue +49%
  • WU
    WESLEYAN UNIVERSITY
    2× · 2021–2022 · $50k · revenue +35%

Funded once

  • HK
    HARVARD KENNEDY SCHOOL DEAN'S COUNCIL
    one grant, 2022 · $50k
  • TW
    THE WILLISTON NORTHAMPTON SCHOOLgraduated
    one grant, 2020 · $50k · revenue +41%
  • TV
    THE VIVIAN BEAUMONT THEATERINC D/B/A LINCOLN CENTER THEATERgraduated
    one grant, 2022 · $25k · revenue +45%
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
New York School of Interior Design

New york school of interior design provides the most innovative, immersive, and transformative interior design education in the world, demonstrating the impact of professionally designed interiors on the health, happiness, and well-being…

Education
2
Boston Architectural College

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

—
3
Manhattanville University

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

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
Foundation for Jewish Philanthropies Inc

See schedule othe organization is a not-for-profit, public charity established in 1911 to provide for the quality and continuity of jewish life in western new york and around the world through private philanthropy. the foundation seeks,…

Philanthropy
6
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
7
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
8
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
9
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
10
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.

—
11
Bar Ilan University in Israel Inc

Biu produces students who excel in the sciences, humanities, law, engineering, business & the arts.

—
12
Stony Brook Ophthalmology University Faculty Practice Corporation

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

Health
How this is measured
The grantee most central to the portfolio’s shape is Gillen Brewer School; the most unlike its peers is Friends of the Israel Defense Forces. 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

30 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. 30 of the 44 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)
2
Early backer (in before they grew)
30/30
Grantees still filing
26/30
Grew since first funded

Where the money sits, by cause and then by grantee

CENTRAL SYNAGOGUE: $55,000 · OtherCENTRAL SYNAGOGUEHARVARD KENNEDY SCHOOL DEAN'S COUNCIL: $50,000 · OtherHARVARD KENNEDY SCHOOL DEAN'S COUNCILIndividual grant recipient: $40,000 · OtherIndividual grant recipientJAMES MADISON SCHOOL: $25,000 · OtherJAMES MADISON SCHOOLTHE HEWITT SCHOOL: $25,000 · OtherTHE HEWITT SCHOOLFARE: $17,000 · OtherFAREUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $15,000 · Other+20 more: $82,500 · Other+20 moreDUKE UNIVERSITY: $100,000 · EducationDUKE UNIVERSITYTHE WILLISTON NORTHAMPTON SCHOOL: $50,000 · EducationTHE WILLISTON NORTHAMPTON SC…WESLEYAN UNIVERSITY: $50,000 · EducationWESLEYAN UNIVERSITYRIVERDALE COUNTRY SCHOOL INC: $25,000 · EducationRIVERDALE COUNTRY SCHOOL INC+2 more: $5,500 · EducationTHE YOUNG MEN'S AND YOUNG WOMEN'S HEBREW ASSOCIATION: $225,500 · ReligionTHE YOUNG MEN'S AND YOUNG W…THE VIVIAN BEAUMONT THEATERINC D/B/A LINCOLN CENTER THEATER: $25,000 · Arts & CultureTHE VIVIA…NEW YORK CITY CENTER INC: $25,000 · Arts & CultureNEW YORK …FRIENDS OF THE HIGH LINE INC: $10,000 · Arts & CultureFRIENDS O…ALL STARS PROJECT INC: $10,000 · Arts & CultureALL STARS…THE JEWISH MUSEUM: $4,800 · Arts & CultureTHE JEWIS…American Friends of Israel Philharmonic Orchestra: $3,000 · Arts & Culture+1 more: $2,500 · Arts & CultureNEW YORK RESTORATION PROJECT: $32,000 · EnvironmentTHE ASPEN INSTITUTE INC: $25,000 · Social ScienceBEST FRIENDS ANIMAL SOCIETY: $19,500 · Animals
Other$309,500Education$230,500Religion$225,500Arts & Culture$80,300Environment$32,000Social Science$25,000Animals$19,500

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

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetTHE YOUNG MEN'S AND YOUNG WOMEN'S HEBREW ASSOCIATION: $225,500 over 6y, 0.3% of budgetDUKE UNIVERSITY: $100,000 over 2y, 0.0% of budgetTHE WILLISTON NORTHAMPTON SCHOOL: $50,000 over 1y, 0.2% of budgetWESLEYAN UNIVERSITY: $50,000 over 2y, 0.0% of budgetNEW YORK RESTORATION PROJECT: $32,000 over 4y, 0.2% of budgetTHE VIVIAN BEAUMONT THEATERINC D/B/A LINCOLN CENTER THEATER: $25,000 over 1y, 0.1% of budgetRIVERDALE COUNTRY SCHOOL INC: $25,000 over 1y, 0.0% of budgetNEW YORK CITY CENTER INC: $25,000 over 1y, 0.1% of budgetTHE ASPEN INSTITUTE INC: $25,000 over 1y, 0.0% of budgetTHE HEWITT SCHOOL: $25,000 over 1y, 0.1% of budgetBEST FRIENDS ANIMAL SOCIETY: $19,500 over 3y, 0.0% of budgetUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $15,000 over 3y, 0.0% of budgetFRIENDS OF THE HIGH LINE INC: $10,000 over 1y, 0.1% of budgetTHE BREAST CANCER RESEARCH FOUNDATION INC: $10,000 over 2y, 0.0% of budgetALL STARS PROJECT INC: $10,000 over 1y, 0.1% of budgetCROHN'S & COLITIS FOUNDATION INC: $6,500 over 2y, 0.0% of budgetJEWISH BOARD OF FAMILY & CHILDREN'S SERVICES INC: $5,500 over 2y, 0.0% of budgetDALTON SCHOOLS INC: $5,000 over 1y, 0.0% of budgetTHE JEWISH MUSEUM: $4,800 over 2y, 0.0% of budgetTEAM RUBICON INC: $3,500 over 2y, 0.0% of budgetAmerican Friends of Israel Philharmonic Orchestra: $3,000 over 2y, 0.0% of budgetMORASHA OLAMI INC: $2,500 over 1y, 0.0% of budgetWORLD MONUMENTS FUND INC: $2,500 over 1y, 0.0% of budgetFRIENDS OF THE ISRAEL DEFENSE FORCES: $2,500 over 1y, 0.0% of budgetTHE RESOURCE FOUNDATION INC: $2,500 over 1y, 0.1% of budgetRANDALL'S ISLAND PARK ALLIANCE INC: $2,000 over 1y, 0.0% of budgetISRAEL TENNIS CENTERS FOUNDATION INC: $1,000 over 1y, 0.0% of budgetGILLEN BREWER SCHOOL: $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.

Jewish Communal FundNational Philanthropi…Morgan Stanley Global…The Bank of America C…American Online Givin…Donor Advised Charita…Vanguard Charitable E…Fidelity Investments …Amazonsmile Foundation
Jewish Communal FundNY13.8× affinity5 shared granteesties to 8 of 8Hover any node to trace its alignments.Compare side by side →

Open a dossier: Jewish Communal Fund · National Philanthropic Trust · Morgan Stanley Global Impact Funding Trust Inc · The Bank of America Charitable Foundation Inc · American Online Giving Foundation Inc · Donor Advised Charitable Giving Inc · Vanguard Charitable Endowment Program · 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 Laurence and Carolyn Belfer Family Foundation C/O Belfer Management funds: left to right is the share of its income from government, bottom to top the share from Laurence and Carolyn Belfer Family Foundation C/O Belfer Management. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 20%0%1%3%5%funder's share of their income ↑0%8%15%22%30%share of the org’s income from government →median 1%
  • Wesleyan University: 1% of income from government
no gov moneyreceives it· size = income
2get no government money at all
6report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–30%
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 Laurence and Carolyn Belfer Family Foundation C/O Belfer Management?

Find your warmest path to Laurence and Carolyn Belfer Family Foundation C/O Belfer Management 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 44 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 Laurence and Carolyn Belfer Family Foundation C/O Belfer Management’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