· 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.
What you funded, over time
Every grant clustered by its grantee’s IRS cause code (NTEE), by year — across FY2020–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k27 grants · $68k
- $10k–50k11 grants · $235k
- $50k–250k12 grants · $1.0M
- $250k+3 grants · $1.9M
Anchored by a single position — about 90% of reported assets are held in Investment Mack Cali Realty.
| Recipient | Amount |
|---|---|
| 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 |
| KRAVIS CENTER FOR THE PERFORMING ARTS | $100,000 |
| Individual grant recipient | $100,000 |
| THE JEWISH MUSEUM | $95,000 |
| 92Y | $66,667 |
| BIRTHRIGHT ISRAEL FOUNDATION | $50,000 |
| TARGET ALS FOUNDATION INC | $50,000 |
| THE NEW JEWISH HOME | $50,000 |
| MORSELIFE FOUNDATION INC | $50,000 |
| YESHIVA UNIVERSITY | $50,000 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Your 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 your grants land in higher-need ZIPs.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
Which US states your grants reach
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +35% since the first grant, against +1% for the ones you 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
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2024, 93% of grant dollars renewed an existing relationship; $220k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). 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
- NHNORTHWELL HEALTH FOUNDATION5× · 2020–2024 · $3.3M · revenue +3%
- UJUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC3× · 2022–2024 · $706k · revenue +19%
- AFAMERICAN FRIENDS OF THE ISRAEL MUSEUM5× · 2020–2024 · $435k · revenue +67%
Funded once
- UJUNITED JEWISH APPEALone grant, 2023 · $400k
- USUNITED STATES HOLOCAUST MEMORIAL MUSEUMone grant, 2022 · $30k
- PCPROSTATE CANCER FOUNDATIONone grant, 2023 · $25k · revenue -1%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
The institute for advanced study (the institute) is one of the world's leading centers for theoretical research and intellectual inquiry. see schedule o.
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…
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.
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.
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…
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…
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…
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…
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.
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…
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…
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…
For reference, the grantee most central to the portfolio’s shape is Jewish Federation of Palm Beach County Inc and 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.
Your grantees are a median of 38 years old; the field is 16. You back the established end — and your money leans older still.
The field is 20% startups (under 5 years old) — 3% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 12% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
69 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, 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; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your 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 BRUCE AND MARSHA MOSKOWITZ FOUNDATION INC ↗
- Who funds RAYMOND F KRAVIS CENTER FOR THE PERFORMING ARTS 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 PROSTATE CANCER FOUNDATION ↗
- Who funds MECOX BAY CONSERVANCY INC ↗
- Who funds BROOKLYN TECH ALUMNI FOUNDATION INC ↗
- 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 ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
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
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization The William & Phyllis Mack Family Foundation Inc funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal, a single department, or state — and drag the year to watch it move.
- Dana-Farber Cancer Institute Inc — 7% of income from government
- Connecticut Public Broadcasting Inc — 3% of income from government
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 your grant caused the public funding. Coverage is precision-first — a floor, not 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 12–24 months.