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The David & Sondra Mack Family Foundation Inc at a glance

· 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.

$2.9M
Granted FY2024still arriving
188
Grants FY2024still arriving
18
States reached
$925k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0168% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2021 to 2024.

Education$3.2MHealth$1.9MReligion$1.3MPhilanthropy$1.1MArts & Culture$834kHuman Services$362kHousing & Shelter$241kInternational$219kOther$0
02FY2024 · 188 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k142 grants · $379k
  • $10k–50k39 grants · $676k
  • $50k–250k4 grants · $395k
  • $250k+3 grants · $1.5M
$3,500
Median grant
18
States reached
$17M
Total assets
Largest grants
RecipientAmount
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
BOYS & GIRLS CLUBS$25,000
THE SOCIETY OF THE FOUR$25,000
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 (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 its grants land in higher-need ZIPs.

area typical 9%ISRAEL GUIDE DOG CENTER: $500 → 6%CHALLENGED ATHLETES: $10k → 11%KEVIN KING MEMORIAL: $1k → 20%CHILDREN'S HOME SOCIETY: $13k → 13%CHALLENGED ATHLETES: $5k → 11%CHILDREN'S HOME SOCIETY: $10k → 13%SCOTT J BEIGEL MEMORIAL FUND: $5k → 7%CHILDREN'S HOME SOCIETY: $5k → 13%CHILDREN'S HOME SOCIETY: $3k → 13%GUIDING EYES: $81 → 9%PAPBA WIDOWS AND CHILDREN'S FUND: $1k → 7%HAMPTON WHODUNIT: $10k → 7%HAMPTON WHODUNIT: $10k → 7%THE SAFE CENTER LI: $10k → 6%THE SAFE CENTER LI: $3k → 6%MORSELIFE FOUNDATION: $143k → 11%MORSELIFE FOUNDATION: $25k → 11%MORSELIFE FOUNDATION: $15k → 11%WOUNDED WARRIOR PROJECT: $200 → 17%PROJECT THANK A COP: $2k → 6%WOUNDED WARRIOR PROJECT: $200 → 17%SUNRISE ASSOCIATION: $4k → 6%LONG ISLAND CARES: $3k → 6%LONG ISLAND CARES: $3k → 6%SID JACOBSON JCC: $10k → 6%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

NH
WA
IL
MI
NY
MA
WY
IA
OH
PA
NJ
CT
RI
CA
WV
VA
MD
DE
AZ
AR
TN
NC
SC
DC
OK
LA
GA
TX
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.

89%of every dollar goes to organizations it has funded before.
$12M · 159 repeat orgs$1.5M to everyone else

Grantees it renews have grown median revenue +22% since the first grant, against +9% for those 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

Re-uppedFunded once

Organizations

159
137

Total granted

$12M
$1.2M

Median revenue growth · since first grant

+22%
+9%

Still filing today

32%
31%

New vs renewed · share of each year

In FY2024, 92% of grant dollars renewed an existing relationship; $240k went to new ones.

50%100%’21’22’23’24
RenewedFirst-time

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

’21’22’23’24
EducationHuman ServicesHealthArts & CultureAnimalsInternationalOther
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

  • HU
    HOFSTRA UNIVERSITY
    4× · 2021–2024 · $2.9M · revenue +16%
  • RF
    RAYMOND F KRAVIS CENTER FOR THE PERFORMING ARTS INC
    4× · 2021–2024 · $590k · revenue +279%
  • UJ
    UNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC
    4× · 2021–2024 · $431k · revenue +5%

Funded once

  • IG
    Individual grant recipient
    one grant, 2021 · $500k
  • MA
    MAURICE A DEAN SCHOOL
    one grant, 2021 · $100k
  • NL
    NYU LANGONE HEALTH
    one grant, 2023 · $50k
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
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.

—
3
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
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
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
6
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
7
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
8
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
9
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
10
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
11
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
12
Northwell Health Inc

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.

Community Improvement
How this is measured
The grantee most central to the portfolio’s shape is March of Dimes Inc; 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.
04the grantee network

120 grantees tracked through their own filings, 2017–2026.

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 2026, 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.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
11
Early backer (in before they grew)
118/120
Grantees still filing
78/120
Grew since first funded

Where the money sits, by cause and then by grantee

Individual grant recipient: $2,092,500 · OtherIndividual grant recipientTEMPLE ISRAEL INC: $683,118 · OtherTEMPLE ISRAEL INCIndividual grant recipient: $500,000 · OtherIndividual grant recipientJEWISH FEDERATION: $480,000 · OtherJEWISH FEDERATION+149 more: $3,691,640 · Other+149 moreHOFSTRA UNIVERSITY: $2,882,500 · EducationHOFSTRA UNIVERSITY+9 more: $67,500 · EducationNORTHWELL HEALTH FOUNDATION: $1,388,500 · HealthNORTHWELL HEA…FOUNDCARE INC: $91,500 · HealthFOUNDCARE INC+7 more: $95,500 · Health+7 moreRAYMOND F KRAVIS CENTER FOR THE PERFORMING ARTS INC: $589,708 · Arts & CultureNORTON MUSEUM OF ART INC: $24,000 · Arts & Culture+6 more: $64,650 · Arts & CultureUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $431,000 · PhilanthropyBOYS TOWN JERUSALEM FOUNDATION OF AMERICA: $52,000 · Philanthropy+2 more: $10,000 · PhilanthropyMORSELIFE FOUNDATION INC: $182,500 · Human ServicesTHE CHILDREN'S HOME SOCIETY OF FLORIDA: $30,000 · Human ServicesHAMPTONSWHODUNIT INC: $20,000 · Human ServicesCURA FOUNDATION: $20,000 · Human ServicesCHALLENGED ATHLETES INC: $15,000 · Human ServicesThe Safe Center LI Inc: $12,500 · Human ServicesSID JACOBSON JEWISH COMMUNITY CENTER: $10,000 · Human Services+2 more: $10,000 · Human ServicesWASHINGTON INSTITUTE FOR NEAR EAST POLICY: $75,000 · InternationalBIRTHRIGHT ISRAEL FOUNDATION: $40,000 · InternationalIMPACTISRAEL INC: $28,000 · InternationalISRAEL TENNIS CENTERS FOUNDATION INC: $13,000 · InternationalCentral Fund of Israel: $12,500 · InternationalFRIENDS OF THE ISRAEL DEFENSE FORCES: $12,500 · InternationalUNITED NATIONS DEVELOPMENT CORPORATION: $10,000 · International
Other$7,447,258Education$2,950,000Health$1,575,500Arts & Culture$678,358Philanthropy$493,000Human Services$300,000International$191,000

Showing the 200 largest grantees by grant value.

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 budgetHOFSTRA UNIVERSITY: $2,882,500 over 4y, 0.2% of budgetNORTHWELL HEALTH FOUNDATION: $1,388,500 over 4y, 0.7% of budgetRAYMOND F KRAVIS CENTER FOR THE PERFORMING ARTS INC: $589,708 over 4y, 1.1% of budgetUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $431,000 over 4y, 0.0% of budgetMORSELIFE FOUNDATION INC: $182,500 over 3y, 1.9% of budgetFOUNDCARE INC: $91,500 over 3y, 0.1% of budgetWASHINGTON INSTITUTE FOR NEAR EAST POLICY: $75,000 over 3y, 0.1% of budgetBIG DOG RANCH RESCUE INC: $70,000 over 3y, 0.2% of budgetBOYS TOWN JERUSALEM FOUNDATION OF AMERICA: $52,000 over 4y, 0.3% of budgetBIRTHRIGHT ISRAEL FOUNDATION: $40,000 over 4y, 0.0% of budgetTURNING POINT USA INC: $40,000 over 4y, 0.0% of budgetTHE CHILDREN'S HOME SOCIETY OF FLORIDA: $30,000 over 4y, 0.0% of budgetThe Oxalosis & Hyperoxaluria Foundation: $30,000 over 3y, 1.1% of budgetIMPACTISRAEL INC: $28,000 over 4y, 0.1% of budgetNORTON MUSEUM OF ART INC: $24,000 over 3y, 0.0% of budgetTRI COUNTY HUMANE SOCIETY: $23,250 over 4y, 0.2% of budgetAMERICAN SKIN ASSOCIATION INC: $20,000 over 2y, 0.9% of budgetHAMPTONSWHODUNIT INC: $20,000 over 2y, 3.4% of budgetCOURTS OF DREAMS INC: $20,000 over 2y, 9.0% of budgetCURA FOUNDATION: $20,000 over 1y, 6.2% of budgetTHE ZOOLOGICAL SOCIETY OF THE PALM BEACHES INC: $17,500 over 4y, 0.0% of budgetSCOA INC: $15,000 over 2y, 0.7% of budgetCHALLENGED ATHLETES INC: $15,000 over 2y, 0.1% of budgetDana-Farber Cancer Institute Inc: $15,000 over 3y, 0.0% of budgetSOUTH FLORIDA PBS INC: $14,000 over 4y, 0.0% of budgetMuseum of Modern Art: $13,150 over 2y, 0.0% of budgetISRAEL TENNIS CENTERS FOUNDATION INC: $13,000 over 2y, 0.1% of budgetThe Safe Center LI Inc: $12,500 over 2y, 0.1% of budgetCentral Fund of Israel: $12,500 over 2y, 0.0% of budgetSTEPHEN SILLER TUNNEL TO TOWERS FOUNDATION: $12,500 over 2y, 0.0% of budgetFRIENDS OF THE ISRAEL DEFENSE FORCES: $12,500 over 3y, 0.0% of budgetICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $12,500 over 4y, 0.0% of budgetNASSAU POLICE CONFERENCE: $11,000 over 2y, 2.0% of budgetAmerican Heart Association Inc: $10,500 over 2y, 0.0% of budgetTHE JEWISH MUSEUM: $10,500 over 3y, 0.0% of budgetCornell University: $10,000 over 1y, 0.0% of budgetMARCH OF DIMES INC: $10,000 over 1y, 0.0% of budgetZeldin Cares Inc: $10,000 over 1y, 2.4% of budgetUNITED NATIONS DEVELOPMENT CORPORATION: $10,000 over 1y, 0.0% of budgetCASITA MARIA INC: $10,000 over 1y, 0.3% of budgetSID JACOBSON JEWISH COMMUNITY CENTER: $10,000 over 1y, 0.1% of budgetTHE YOUNG MEN'S AND YOUNG WOMEN'S HEBREW ASSOCIATION: $7,500 over 1y, 0.0% of budgetPREP FOR PREP: $7,500 over 1y, 0.1% of budgetTHE NICK LOEB FOUNDATION INC: $7,000 over 2y, 1.7% of budgetPORT AUTHORITY PBA INC: $5,700 over 2y, 0.1% of budgetKATZ HILLEL DAY SCHOOL OF BOCA RATON INC: $5,000 over 1y, 0.0% of budgetBROADWAY CARESEQUITY FIGHTS AIDS INC: $5,000 over 1y, 0.0% of budgetQUANTUM HOUSE INC: $5,000 over 1y, 0.2% 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 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 BIRTHRIGHT ISRAEL FOUNDATION ↗
  • Who funds TURNING POINT USA INC ↗

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.

Posillico Foundation …Jewish Communal FundThe New York Communit…The Goldman Sachs Cha…The Harry & Phyllis M…United Jewish Appeal-…Community Foundation …FjcThe Bessemer Giving F…The Ayco Charitable F…National Philanthropi…Baird Foundation Inc
Posillico Foundation IncNY15.5× affinity5 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

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

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 David & Sondra Mack Family Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from The David & Sondra Mack Family Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 140%1%3%6%10%funder's share of their income ↑0%10%20%30%40%share of the org’s income from government →median 6%
  • 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
no gov moneyreceives it· size = income
14get no government money at all
25report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–40%
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 361 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 David & Sondra 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