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The William & Phyllis Mack Family Foundation Inc at a glance

· Private foundation

The William & Phyllis Mack Family Foundation Inc

Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$3.2M
Granted FY2024still arriving
53
Grants FY2024still arriving
7
States reached
$820k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0195% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2024.

Education$7.2MArts & Culture$6.0MHealth$3.6MPhilanthropy$1.9MReligion$942kHuman Services$434kInternational$260kHousing & Shelter$150kOther$0
02FY2024 · 53 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k27 grants · $68k
  • $10k–50k11 grants · $235k
  • $50k–250k12 grants · $1.0M
  • $250k+3 grants · $1.9M
$6,867
Median grant
7
States reached
$5.9M
Total assets

Anchored by a single position: about 90% of reported assets are held in Investment Mack Cali Realty.

Largest grants
RecipientAmount
GUGGENHEIM MUSEUM$820,000
NORTHWELL HEALTH FOUNDATION$788,000
UJA FEDERATION OF NEW YORK$300,000
JEWISH FEDERATION OF PALM BEACH$151,000
AMERICAN FRIENDS OF THE ISRAEL MUSEUM$130,000
PARK AVENUE SYNAGOGUE$109,848
Individual grant recipient$100,000
KRAVIS CENTER FOR THE PERFORMING ARTS$100,000
THE JEWISH MUSEUM$95,000
92Y$66,667
MORSELIFE FOUNDATION INC$50,000
YESHIVA UNIVERSITY$50,000
THE NEW JEWISH HOME$50,000
BIRTHRIGHT ISRAEL FOUNDATION$50,000
TARGET ALS FOUNDATION INC$50,000
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 (FY20–24, $151k) land where the poverty rate runs at 11%, against an area that typically sits at 11%. 98% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%DELIVERING GOOD: $5k → 17%THE LUSTGARTEN FOUNDATION: $500 → 6%THE LUSTGARTEN FOUNDATION: $500 → 6%THE LUSTGARTEN FOUNDATION: $500 → 6%THE LUSTGARTEN FOUNDATION: $500 → 6%THE LUSTGARTEN FOUNDATION: $500 → 6%MORSELIFE FOUNDATION INC: $70k → 11%MORSELIFE FOUNDATION INC: $50k → 11%MORSELIFE FOUNDATION INC: $21k → 11%MORSELIFE FOUNDATION INC: $1k → 11%HENRY STREET SETTLEMENT: $1k → 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

MI
NY
MA
IN
PA
NJ
CT
CA
DC
OK
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.

94%of every dollar goes to organizations it has funded before.
$12M · 45 repeat orgs$846k to everyone else

Grantees it renews have grown median revenue +35% since the first grant, against +1% for those funded once.

45 repeat relationships: 34 still active in FY2024, 11 since wound down; 17 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

45
47

Total granted

$12M
$626k

Median revenue growth · since first grant

+35%
+1%

Still filing today

69%
49%

New vs renewed · share of each year

In FY2024, 93% of grant dollars renewed an existing relationship; $220k went to new ones.

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

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

’20’21’22’23’24
Arts & CultureHealthEducationPhilanthropyInternationalHuman ServicesOther
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

  • NH
    NORTHWELL HEALTH FOUNDATION
    5× · 2020–2024 · $3.3M · revenue +3%
  • UJ
    UNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC
    3× · 2022–2024 · $706k · revenue +19%
  • AF
    AMERICAN FRIENDS OF THE ISRAEL MUSEUM
    5× · 2020–2024 · $435k · revenue +67%

Funded once

  • UJ
    UNITED JEWISH APPEAL
    one grant, 2023 · $400k
  • US
    UNITED STATES HOLOCAUST MEMORIAL MUSEUM
    one grant, 2022 · $30k
  • BT
    BROOKLYN TECH ALUMNI FOUNDATION INC
    one grant, 2022 · $25k · revenue -4%
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
Institute for Advanced Study - Louis Bamberger & Mrs Felix Fuld Foundation

The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.

Science & Tech
2
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
3
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
4
New York Genome Center Inc

Operate a state-of-the-art, world-class genomic research center that creates and uses advanced genomics to understand the genetic basis of disease. for more information, see schedule o.

Health
5
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
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
The Lieber Institute Inc

The mission of the institute is to translate basic genetic and molecular mechanisms of schizophrenia and related developmental brain disorders into clinical advances that change the lives of affected individuals. it is catalyzing a new…

Health
8
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
9
New York University

Nyu is a private university with approximately 60,000 matriculating students in 20 schools and institutes. nyu's primary missions are education, research and scholarship, and patient care.

Education
10
The Feinstein Institutes for Medical Research

The feinstein institute for medical research ("the institute") is the research branch of northwell health ("northwell"). through its affiliation with northwell, the institute's mission is to bridge the gap between biomedical research and…

Health
11
Samuel Waxman Cancer Research Foundation

The samuel waxman cancer research foundation (the "foundation") funds innovative research to bring faster cures to patients. in addition to supporting ongoing collaborative research in specific cancers, our scientists are investigating the…

—
12
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
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 Federal Enforcement Homeland Security Foundation. 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

69 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. 69 of the 112 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)
6
Early backer (in before they grew)
69/69
Grantees still filing
44/69
Grew since first funded

Where the money sits, by cause and then by grantee

TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA: $7,000,000 · EducationTRUSTEES OF THE UNIVERSITY OF PENNSYLVA…+7 more: $243,000 · EducationGUGGENHEIM MUSEUM: $4,775,000 · OtherGUGGENHEIM MUSEUMPARK AVENUE SYNAGOGUE INC: $906,211 · OtherPARK AVENUE SYNAGOGUE INCUNITED JEWISH APPEAL: $400,000 · OtherUNITED JEWISH APPEAL92Y: $271,668 · Other+59 more: $707,984 · Other+59 moreNORTHWELL HEALTH FOUNDATION: $3,284,750 · HealthNORTHWELL HEALTH F…+10 more: $45,950 · HealthUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $706,000 · PhilanthropyJEWISH FEDERATION OF PALM BEACH COUNTY INC: $453,000 · PhilanthropyTown of Palm Beach United Way Inc: $145,000 · PhilanthropyBRUCE AND MARSHA MOSKOWITZ FOUNDATION INC: $125,000 · Philanthropy+3 more: $27,100 · PhilanthropyAMERICAN FRIENDS OF THE ISRAEL MUSEUM: $435,000 · Arts & CultureTHE JEWISH MUSEUM: $431,500 · Arts & CultureRAYMOND F KRAVIS CENTER FOR THE PERFORMING ARTS INC: $125,000 · Arts & CultureThe Society of the Four Arts Inc: $97,000 · Arts & CultureNORTON MUSEUM OF ART INC: $57,500 · Arts & Culture+7 more: $50,500 · Arts & CultureFRIENDS OF THE ISRAEL DEFENSE FORCES: $107,500 · InternationalBIRTHRIGHT ISRAEL FOUNDATION: $100,000 · InternationalISRAEL TENNIS CENTERS FOUNDATION INC: $39,500 · InternationalAMERICAN FRIENDS OF HEBREW UNIVERSITY INC: $14,300 · International+2 more: $8,600 · InternationalMORSELIFE FOUNDATION INC: $142,000 · Human Services+4 more: $9,500 · Human Services
Education$7,243,000Other$7,060,863Health$3,330,700Philanthropy$1,456,100Arts & Culture$1,196,500International$269,900Human Services$151,500

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 budgetTRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA: $7,000,000 over 4y, 0.0% of budgetNORTHWELL HEALTH FOUNDATION: $3,284,750 over 5y, 0.6% of budgetUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $706,000 over 3y, 0.1% of budgetJEWISH FEDERATION OF PALM BEACH COUNTY INC: $453,000 over 5y, 0.3% of budgetAMERICAN FRIENDS OF THE ISRAEL MUSEUM: $435,000 over 5y, 1.0% of budgetTHE JEWISH MUSEUM: $431,500 over 5y, 0.7% of budgetYESHIVA UNIVERSITY: $150,000 over 3y, 0.0% of budgetTown of Palm Beach United Way Inc: $145,000 over 5y, 0.9% of budgetMORSELIFE FOUNDATION INC: $142,000 over 4y, 0.9% of budgetRAYMOND F KRAVIS CENTER FOR THE PERFORMING ARTS INC: $125,000 over 2y, 0.2% of budgetBRUCE AND MARSHA MOSKOWITZ FOUNDATION INC: $125,000 over 5y, 8.1% of budgetFRIENDS OF THE ISRAEL DEFENSE FORCES: $107,500 over 3y, 0.0% of budgetBIRTHRIGHT ISRAEL FOUNDATION: $100,000 over 4y, 0.1% of budgetThe Society of the Four Arts Inc: $97,000 over 5y, 0.2% of budgetNORTON MUSEUM OF ART INC: $57,500 over 4y, 0.1% of budgetTARGET ALS FOUNDATION INC: $50,000 over 1y, 0.1% of budgetISRAEL TENNIS CENTERS FOUNDATION INC: $39,500 over 5y, 0.2% of budgetCONNECTICUT PUBLIC BROADCASTING INC: $35,000 over 2y, 0.1% of budgetGIFT OF LIFE MARROW REGISTRY INC: $26,000 over 2y, 0.1% of budgetBROOKLYN TECH ALUMNI FOUNDATION INC: $25,000 over 1y, 1.0% of budgetMECOX BAY CONSERVANCY INC: $25,000 over 1y, 1.7% of budgetPROSTATE CANCER FOUNDATION: $25,000 over 1y, 0.0% of budgetPalm Beach Civic Association Inc: $20,000 over 4y, 0.3% of budgetPALM BEACH COUNTRY CLUB FOUNDATION INC: $14,806 over 4y, 0.7% of budgetAMERICAN FRIENDS OF HEBREW UNIVERSITY INC: $14,300 over 3y, 0.0% of budgetNEW YORK RESTORATION PROJECT: $12,500 over 1y, 0.2% of budgetLEO BAECK INSTITUTE INC: $12,000 over 1y, 0.1% of budgetPECONIC LAND TRUST INC: $10,500 over 4y, 0.0% of budgetLUPUS RESEARCH ALLIANCE INC: $10,000 over 3y, 0.0% of budgetALZHEIMER'S DRUG DISCOVERY FOUNDATION: $8,000 over 2y, 0.0% of budgetMuseum of Modern Art: $6,000 over 1y, 0.0% of budgetICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $5,000 over 1y, 0.0% of budgetMUSEUM OF AMERICAN FINANCE: $5,000 over 1y, 0.3% of budgetFederal Enforcement Homeland Security Foundation: $5,000 over 1y, 1.0% of budgetSOLOMON INSTITUTE INC: $5,000 over 1y, 0.7% of budgetPHYSICIANS FOR HUMAN RIGHTS INC: $5,000 over 2y, 0.0% of budgetDELIVERING GOOD INC: $5,000 over 1y, 0.0% of budgetPREP FOR PREP: $5,000 over 1y, 0.1% of budgetAMERICAN FRIENDS OF MAGEN DAVID ADOM: $3,600 over 1y, 0.0% of budgetMUSEUM OF JEWISH HERITAGE A LIVING MEMORIAL TO THE HOLOCAUST: $3,000 over 2y, 0.0% of budgetCENTER FOR CREATIVE EDUCATION INC: $3,000 over 2y, 0.2% of budgetPROMISE FUND OF FLORIDA INC: $2,500 over 1y, 0.1% of budgetMARC LUSTGARTEN PANCREATIC CANCER FOUNDATION: $2,500 over 5y, 0.0% of budgetThe United States Holocaust Memorial Museum: $2,500 over 1y, 0.0% of budgetTHE PHILHARMONIC SYMPHONY SOCIETY OF NY INC: $2,500 over 1y, 0.0% of budgetTHE BREAST CANCER RESEARCH FOUNDATION INC: $1,850 over 2y, 0.0% of budgetTHE MICHAEL J FOX FOUNDATION FOR PARKINSON'S RESEARCH: $1,750 over 2y, 0.0% of budgetATLANTIC GOLF CLUB EDUCATIONAL FUND INC: $1,750 over 1y, 0.5% 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.

  • Who funds TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA ↗
  • Who funds NORTHWELL HEALTH FOUNDATION ↗
  • Who funds UNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC ↗
  • Who funds JEWISH FEDERATION OF PALM BEACH COUNTY INC ↗
  • Who funds AMERICAN FRIENDS OF THE ISRAEL MUSEUM ↗
  • Who funds THE JEWISH MUSEUM ↗
  • Who funds YESHIVA UNIVERSITY ↗
  • Who funds Town of Palm Beach United Way Inc ↗
  • Who funds MORSELIFE FOUNDATION INC ↗
  • Who funds RAYMOND F KRAVIS CENTER FOR THE PERFORMING ARTS INC ↗
  • Who funds BRUCE AND MARSHA MOSKOWITZ FOUNDATION INC ↗
  • Who funds FRIENDS OF THE ISRAEL DEFENSE FORCES ↗
  • Who funds BIRTHRIGHT ISRAEL FOUNDATION ↗
  • Who funds The Society of the Four Arts Inc ↗
  • Who funds NORTON MUSEUM OF ART INC ↗
  • Who funds TARGET ALS FOUNDATION INC ↗
  • Who funds ISRAEL TENNIS CENTERS FOUNDATION INC ↗
  • Who funds CONNECTICUT PUBLIC BROADCASTING INC ↗
  • Who funds GIFT OF LIFE MARROW REGISTRY INC ↗
  • Who funds BROOKLYN TECH ALUMNI FOUNDATION INC ↗
  • Who funds MECOX BAY CONSERVANCY INC ↗
  • Who funds PROSTATE CANCER FOUNDATION ↗
  • Who funds Palm Beach Civic Association Inc ↗
  • Who funds PALM BEACH COUNTRY CLUB FOUNDATION INC ↗
  • Who funds AMERICAN FRIENDS OF HEBREW UNIVERSITY INC ↗
  • Who funds NEW YORK RESTORATION PROJECT ↗

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 FundThe Goldman Sachs Cha…FjcThe New York Communit…National Philanthropi…The Ayco Charitable F…Jpmorgan Chase Founda…Gs Donor Advised Phil…Morgan Stanley Global…The Bank of America C…Donor Advised Charita…American Endowment Fo…
Jewish Communal FundNY27.3× affinity16 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Jewish Communal Fund · The Goldman Sachs Charitable Gift Fund · Fjc · The New York Community Trust · National Philanthropic Trust · The Ayco Charitable Foundation · Jpmorgan Chase Foundation · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Morgan Stanley Global Impact Funding Trust Inc · The Bank of America Charitable Foundation Inc · Donor Advised Charitable Giving Inc · American Endowment 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 The William & Phyllis Mack Family Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from The William & Phyllis Mack Family Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 100%1%3%6%10%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 7%
  • Dana-Farber Cancer Institute Inc: 7% of income from government
  • Connecticut Public Broadcasting Inc: 3% of income from government
no gov moneyreceives it· size = income
10get no government money at all
12report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
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.

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 112 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on William & Phyllis Mack 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