· Private foundation
The David & Sondra 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
By grantee IRS cause code (NTEE).
A cause breakdown isn’t shown here: 54% of THE DAVID & SONDRA MACK FAMILY FOUNDATION INC’s grantee dollars fall outside its nine largest cause areas, whether because the recipient carries no IRS cause code or because its cause sits in the long tail. A chart would be mostly one residual band and misrepresent the portfolio.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k142 grants · $379k
- $10k–50k39 grants · $676k
- $50k–250k4 grants · $395k
- $250k+3 grants · $1.5M
| Recipient | Amount |
|---|---|
| HOFSTRA UNIVERSITY | $925,000 |
| TEMPLE ISRAEL | $277,170 |
| KRAVIS CENTER | $250,000 |
| JEWISH FEDERATION | $115,000 |
| NORTHWELL HEALTH FOUNDATION | $112,000 |
| UJA FEDERATION OF NEW YORK | $100,000 |
| Individual grant recipient | $68,100 |
| Individual grant recipient | $45,000 |
| MET COUNCIL | $40,000 |
| TEMPLE EMANU-EL | $39,155 |
| BIG DOG RANCH | $35,000 |
| OXBRIDGE ACADEMY | $30,000 |
| Individual grant recipient | $27,300 |
| WASHINGTON INSTITUTE | $25,000 |
| TOWN OF PALM BEACH | $25,000 |
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 (FY21–24, $288k) land where the poverty rate runs at 10%, against an area that typically sits at 9%. 80% 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 +20% since the first grant, against +8% for the ones you funded once.
159 repeat relationships — 124 still active in FY2024, 35 since wound down; 62 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, 92% of grant dollars renewed an existing relationship; $240k 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
- HUHOFSTRA UNIVERSITY4× · 2021–2024 · $2.9M · revenue +16%
- RFRAYMOND F KRAVIS CENTER FOR THE PERFORMING ARTS INC4× · 2021–2024 · $590k · revenue +279%
- UJUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC4× · 2021–2024 · $431k · revenue +5%
Funded once
- IGIndividual grant recipientone grant, 2021 · $500k
- MAMAURICE A DEAN SCHOOLone grant, 2021 · $100k
- NLNYU LANGONE HEALTHone grant, 2023 · $50k
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.
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…
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.
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…
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.
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.
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…
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.
Northwell health is the parent company of a fully integrated health system that is committed to promote clinical care, health education, conduct biomedical research, and caring for the community regardless of ability to pay.
For reference, the grantee most central to the portfolio’s shape is March of Dimes Inc and the most unlike its peers is Hanley Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 37 years old; the field is 18. You back the established end — and your money leans older still.
The field is 19% 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 10% 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.
120 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. 120 of the 361 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
Showing your 200 largest grantees by grant value.
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 HOFSTRA UNIVERSITY ↗
- Who funds NORTHWELL HEALTH FOUNDATION ↗
- Who funds RAYMOND F KRAVIS CENTER FOR THE PERFORMING ARTS INC ↗
- Who funds UNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC ↗
- Who funds Met Council Inc ↗
- Who funds MORSELIFE FOUNDATION INC ↗
- Who funds FOUNDCARE INC ↗
- Who funds WASHINGTON INSTITUTE FOR NEAR EAST POLICY ↗
- Who funds BIG DOG RANCH RESCUE INC ↗
- Who funds BOYS TOWN JERUSALEM FOUNDATION OF AMERICA ↗
- Who funds TURNING POINT USA INC ↗
- Who funds BIRTHRIGHT ISRAEL FOUNDATION ↗
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: Posillico Foundation Inc · Jewish Communal Fund · The New York Community Trust · The Goldman Sachs Charitable Gift Fund · The Harry & Phyllis Manko Family Foundation · United Jewish Appeal-Federation of Jewish Philanthropies of New York Inc · Community Foundation for Palm Beach and Martin Counties Inc · Fjc · The Bessemer Giving Fund · The Ayco Charitable Foundation · National Philanthropic Trust · Baird Foundation Inc
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 David & Sondra 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.
- Save the Sound — 37% of income from government
- Brandeis University — 9% of income from government
- Dana-Farber Cancer Institute Inc — 7% of income from government
- The Children's Home Society of Florida — 6% of income from government
- Foundcare Inc — 6% of income from government
- Big Dog Ranch Rescue Inc — 0% of income from government
- Wounded Warrior Project Inc — 0% of income from government
- South Florida Pbs Inc — 0% 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.