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Mark Family Foundation at a glance

· Private foundation

Mark Family 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.

$2.0M
Granted FY2025still arriving
25
Grants FY2025still arriving
3
States reached
$750k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
01100% classified

What it funded, over time

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

Health$7.6MArts & Culture$2.2MEducation$1.4MPhilanthropy$969kReligion$856kHuman Services$427kScience & Tech$175kCommunity Improvement$50kOther$0
02FY2025 · 25 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k13 grants · $49k
  • $10k–50k2 grants · $30k
  • $50k–250k7 grants · $615k
  • $250k+3 grants · $1.4M
$8,300
Median grant
3
States reached
$28M
Total assets
Largest grants
RecipientAmount
NYU LANGONE HEALTH SYSTEM$750,000
TRUSTEES OF THE UNIVERSITY OF PENN$300,000
LINCOLN CENTER FOR THE PERFORMING ARTS$300,000
UJA FEDERATION OF NEW YORK$165,000
PARK AVENUE SYNAGOGUE$121,600
MORSELIFE FOUNDATION$100,000
HORACE MANN SCHOOL$73,500
AMERICAN FRIENDS OF THE ISRAEL MUSEUM$55,000
JEWISH FEDERATION OF PALM BEACH COUNTY$50,000
MEMORIAL SLOAN KETTERING CANCER CENTER$50,000
ATLANTIC GOLF CLUB EDUCATIONAL FUND INC$20,000
AMERICAN FRIENDS OF THE ISRAEL PHILHARMONIC$10,000
AMERICAN JEWISH COMMITTEE$8,300
MANHATTAN THEATRE CLUB$6,000
FOUNDATION FOR EDUCATION IN HONDURAS$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 (FY19–25, $442k) land where the poverty rate runs at 11%, against an area that typically sits at 10%. 98% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 10%MORSELIFE FOUNDATION INC: $110k → 11%MORSELIFE FOUNDATION INC: $110k → 11%MORSELIFE FOUNDATION: $100k → 11%MORSELIFE FOUNDATION: $100k → 11%MORSELIFE FOUNDATION: $1k → 11%SELFHELP COMMUNITY SERVICES: $4k → 17%SELFHELP COMMUNITY SERVICES: $3k → 17%FRIENDS OF GEORGICA POND FOUNDATION: $10k → 7%MOUNT SINAI HEALTH SYSTEM: $5k → 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.
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.
04

Where the work is directed

The same grants placed two ways: where each recipient sits, and where its stated purpose sends the money.

About 34% of Mark Family Foundation’s grant dollars are earmarked for a different county than the recipient’s own address. By recipient address, 87% of the giving stays in NY; by stated purpose, 63%.

Mark Family Foundationlessmore of its giving
Placed by recipient address
How this is measured
Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the funder’s own 990 grant descriptions.
03Its grantees
repeat funding

Who it funds again

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

94%of every dollar goes to organizations it has funded before.
$12M · 30 repeat orgs$811k to everyone else

Grantees it renews have grown median revenue +29% since the first grant, against +9% for those funded once.

30 repeat relationships: 16 still active in FY2025, 14 since wound down; 7 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

30
24

Total granted

$12M
$779k

Median revenue growth · since first grant

+29%
+9%

Still filing today

77%
92%

New vs renewed · share of each year

In FY2025, 98% of grant dollars renewed an existing relationship; $32k 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
Arts & CultureHealthPhilanthropyEducationHuman ServicesInternationalOther
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

  • NL
    NYU LANGONE HEALTH SYSTEM
    4× · 2022–2025 · $4.0M · revenue +12%
  • LC
    LINCOLN CENTER FOR THE PERFORMING ARTS INC
    5× · 2021–2025 · $1.4M · revenue +63%
  • UJ
    UNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC
    6× · 2019–2025 · $816k · revenue +27%

Funded once

  • WM
    WEILL MEDICAL SCHOOL
    one grant, 2021 · $500k
  • WC
    WEILL CORNELL MEDICAL CENTER FUND INC
    one grant, 2023 · $110k
  • EH
    EAST HAMPTON EDUCATION FOUNDATION INC
    one grant, 2022 · $50k · revenue -49%
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
Long Island Jewish Medical Center

Long island jewish medical center is part of the northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and…

Health
2
Albert Einstein College of Medicine

Committed to exceptional healthcare quality for all and actively engaged with our community, einstein drives scientific discovery and educates compassionate leaders in health and science.

Education
3
Lenox Hill Hospital

Lenox hill hospital is part of northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and future generations…

Health
4
North Shore University Hospital

North shore university hospital is part of northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and future…

Health
5
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
6
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
7
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
8
Phelps Memorial Hospital Association

Phelps memorial hospital association ("pmha") is part of northwell health, inc ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the…

Health
9
South Shore University Hospital

South shore university hospital is part of northwell health ("northwell"), which strives to improve the health of the communities it serves and is committed to providing the highest quality clinical care; educating the current and future…

Health
10
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
11
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
12
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
How this is measured
The grantee most central to the portfolio’s shape is Jewish Federation of Palm Beach County Inc; the most unlike its peers is Dana-Farber Cancer Institute Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
05the grantee network

54 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. 54 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)
7
Early backer (in before they grew)
54/54
Grantees still filing
40/54
Grew since first funded

Where the money sits, by cause and then by grantee

NYU LANGONE HEALTH SYSTEM: $4,025,000 · HealthNYU LANGONE HEALTH SYSTEM+10 more: $258,750 · Health+10 moreNYU LANGONE HEALTH: $2,077,500 · OtherNYU LANGONE HEALTHPARK AVENUE SYNAGOGUE INC: $824,010 · OtherPARK AVENUE SYNAGOGUE INCWEILL MEDICAL SCHOOL: $500,000 · OtherWEILL MEDICAL SCHOOLWEILL CORNELL MEDICAL COLLEGE: $400,000 · OtherWEILL CORNELL MEDICAL COLLEGE+16 more: $330,005 · Other+16 moreLINCOLN CENTER FOR THE PERFORMING ARTS INC: $1,437,500 · Arts & CultureLINCOLN CENTER FO…AMERICAN FRIENDS OF THE ISRAEL MUSEUM: $302,300 · Arts & CultureAMERICAN FRIENDS …GUILD HALL OF EAST HAMPTON INC: $190,000 · Arts & CultureGUILD HALL OF EAS…+9 more: $169,500 · Arts & Culture+9 morePresident and Fellows of Harvard College: $650,000 · EducationPresident and…Horace Mann School: $510,000 · EducationHorace Mann S…TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA: $319,500 · EducationTRUSTEES OF T…ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $112,000 · EducationICAHN SCHOOL …+3 more: $52,000 · EducationUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $816,000 · PhilanthropyJEWISH FEDERATION OF PALM BEACH COUNTY INC: $110,000 · PhilanthropyATLANTIC GOLF CLUB EDUCATIONAL FUND INC: $45,000 · Philanthropy+4 more: $60,000 · PhilanthropyMORSELIFE FOUNDATION INC: $421,000 · Human Services+3 more: $21,100 · Human ServicesBIRTHRIGHT ISRAEL FOUNDATION: $10,000 · InternationalThe Foundation for Education in Honduras: $5,000 · International+1 more: $500 · International
Health$4,283,750Other$4,131,515Arts & Culture$2,099,300Education$1,643,500Philanthropy$1,031,000Human Services$442,100International$15,500

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 budgetNYU LANGONE HEALTH SYSTEM: $4,025,000 over 4y, 8.3% of budgetLINCOLN CENTER FOR THE PERFORMING ARTS INC: $1,437,500 over 5y, 0.2% of budgetUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $816,000 over 6y, 0.1% of budgetPresident and Fellows of Harvard College: $650,000 over 5y, 0.0% of budgetHorace Mann School: $510,000 over 7y, 0.1% of budgetMORSELIFE FOUNDATION INC: $421,000 over 5y, 1.5% of budgetTRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA: $319,500 over 5y, 0.0% of budgetAMERICAN FRIENDS OF THE ISRAEL MUSEUM: $302,300 over 7y, 0.8% of budgetGUILD HALL OF EAST HAMPTON INC: $190,000 over 6y, 0.6% of budgetTHE SOUTHAMPTON HOSPITAL FOUNDATION INC: $115,000 over 4y, 0.4% of budgetICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $112,000 over 4y, 0.0% of budgetJEWISH FEDERATION OF PALM BEACH COUNTY INC: $110,000 over 3y, 0.1% of budgetMEMORIAL SLOAN-KETTERING CANCER CENTER: $75,000 over 2y, 0.0% of budgetEAST HAMPTON EDUCATION FOUNDATION INC: $50,000 over 1y, 23% of budgetThe Society of the Four Arts Inc: $50,000 over 2y, 0.1% of budgetTHE JEWISH MUSEUM: $50,000 over 5y, 0.1% of budgetATLANTIC GOLF CLUB EDUCATIONAL FUND INC: $45,000 over 2y, 7.7% of budgetNORTHWELL HEALTH FOUNDATION: $30,250 over 2y, 0.0% of budgetROBIN HOOD FOUNDATION: $30,000 over 2y, 0.0% of budgetTHE PHILHARMONIC SYMPHONY SOCIETY OF NY INC: $20,000 over 1y, 0.0% of budgetBRUCE AND MARSHA MOSKOWITZ FOUNDATION INC: $20,000 over 2y, 3.2% of budgetNORTON MUSEUM OF ART INC: $18,000 over 1y, 0.1% of budgetNEW YORK-PRESBYTERIAN FUND INC: $12,000 over 5y, 0.0% of budgetAMERICAN JEWISH COMMITTEE: $10,100 over 2y, 0.0% of budgetThe Hospital for Special Surgery Fund Inc: $10,000 over 1y, 0.0% of budgetBIRTHRIGHT ISRAEL FOUNDATION: $10,000 over 1y, 0.0% of budgetJAZZ AT LINCOLN CENTER INC: $10,000 over 1y, 0.0% of budgetFRIENDS OF GEORGICA POND FOUNDATION INC: $10,000 over 1y, 1.7% of budgetALZHEIMER'S DRUG DISCOVERY FOUNDATION: $6,500 over 1y, 0.0% of budgetSELFHELP COMMUNITY SERVICES INC: $6,100 over 2y, 0.0% of budgetMANHATTAN THEATRE CLUB INC: $6,000 over 1y, 0.0% of budgetTHE YOUNG MEN'S AND YOUNG WOMEN'S HEBREW ASSOCIATION: $5,500 over 2y, 0.0% of budgetSERIOUSFUN CHILDREN'S NETWORK: $5,000 over 1y, 0.0% of budgetNEW YORK JUNIOR TENNIS LEAGUE INC: $5,000 over 1y, 0.0% of budgetTHE VIVIAN BEAUMONT THEATERINC D/B/A LINCOLN CENTER THEATER: $5,000 over 1y, 0.0% of budgetDana-Farber Cancer Institute Inc: $5,000 over 1y, 0.0% of budgetTown of Palm Beach United Way Inc: $5,000 over 2y, 0.1% of budgetTHE ATLANTIC GOLF CLUB FOUNDATION: $5,000 over 1y, 1.1% of budgetCHILD MIND INSTITUTE INC: $3,500 over 2y, 0.0% of budgetSAMUEL WAXMAN CANCER RESEARCH FOUNDATION: $3,000 over 1y, 0.1% of budgetPALM BEACH COUNTRY CLUB FOUNDATION INC: $2,500 over 1y, 0.4% of budgetThe New York Public Library Astor Lenox and Tilden Foundations: $1,500 over 1y, 0.0% of budgetCITIZENS COMMITTEE FOR CHILDREN OF NEW YORK INC: $1,250 over 3y, 0.0% of budgetFRIENDS OF THE ISRAEL DEFENSE FORCES: $500 over 1y, 0.0% of budgetTHE MEDSTAR-GEORGETOWN MEDICAL CENTER INC: $500 over 1y, 0.0% of budgetMUSEUM OF JEWISH HERITAGE A LIVING MEMORIAL TO THE HOLOCAUST: $500 over 1y, 0.0% of budgetTHE ROCKEFELLER UNIVERSITY: $500 over 1y, 0.0% of budgetThe Palm Beach Police and Fire Foundation Inc: $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.

Jewish Communal FundGs Donor Advised Phil…National Philanthropi…American Online Givin…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
Jewish Communal FundNY15.2× affinity6 shared granteesties to 6 of 6Hover any node to trace its alignments.Compare side by side →

Open a dossier: Jewish Communal Fund · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · National Philanthropic Trust · American Online Giving Foundation Inc · Donor Advised Charitable Giving 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 Mark Family Foundation funds: left to right is the share of its income from government, bottom to top the share from Mark Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 70%2%6%14%25%funder's share of their income ↑0%13%25%38%50%share of the org’s income from government →median 7%
  • President and Fellows of Harvard College: 7% of income from government
  • Dana-Farber Cancer Institute Inc: 7% of income from government
no gov moneyreceives it· size = income
7get no government money at all
10report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–50%
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 Mark Family Foundation?

Find your warmest path to Mark 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.

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 Mark Family’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