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Sontag Foundation at a glanceAlso receives grants: funding profile →

· Private foundation

Sontag Foundation

Its FY2024 filing reports that it accepted unsolicited grant applications.

$7.2M
Granted FY2024still arriving
35
Grants FY2024still arriving
15
States reached
$3.0M
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0199% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Health$14MPhilanthropy$6.8MEducation$6.6MArts & Culture$2.5MScience & Tech$1.7MHuman Services$343kReligion$75kHousing & Shelter$10kOther$0
02FY2024 · 35 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k5 grants · $23k
  • $10k–50k6 grants · $211k
  • $50k–250k18 grants · $2.4M
  • $250k+6 grants · $4.5M
$112,500
Median grant
15
States reached
$220M
Total assets
Largest grants
RecipientAmount
COMMUNITY FOUNDATION OF NE FL$3,000,000
BRIGHAM & WOMEN'S HOSPITAL$362,500
THE REGENTS OF THE UNIVERSITY OF MICHIGAN$350,000
MARK FOUNDATION FOR CANCER RESEARCH$300,000
BOSTON CHILDREN'S HOSPITAL$262,500
CALIFORNIA INSTITUTE OF TECHNOLOGY$250,000
REGENTS OF UNIV OF CA-SAN FRANCISCO$187,500
UNIVERSITY OF TEXAS SOUTHWESTERN$150,000
YALE UNIVERSITY$150,000
MASSACHUSETTS INSTITUTE OF TECHNOLOGY$150,000
THE REGENTS OF UNIVERSITY OF CALIFORNIA$150,000
BAYLOR COLLEGE OF MEDICINE$150,000
RICE UNIVERSITY$150,000
UNIVERSITY OF PITTSBURGH$150,000
CHILDREN'S HOSPITAL OF PHILADELPHIA$150,000
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 (FY23–23, $20k) land where the poverty rate runs at 11%, against an area that typically sits at 10%. 50% of those dollars go to grantees based in above-average-need neighborhoods. Its grants spread fairly evenly across need levels.

area typical 10%SEAMARK RANCH INC: $10k → 9%COMMUNITY HOSPICE OF NE FL: $10k → 14%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

WA
MN
IL
MI
NY
MA
OH
PA
CT
CA
VA
MD
TN
NC
DC
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.

96%of every dollar goes to organizations it has funded before.
$30M · 46 repeat orgs$1.3M to everyone else

Grantees it renews have grown median revenue +31% since the first grant, against +6% for those funded once.

46 repeat relationships: 28 still active in FY2024, 18 since wound down; 5 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

46
24

Total granted

$30M
$958k

Median revenue growth · since first grant

+31%
+6%

Still filing today

50%
58%

New vs renewed · share of each year

In FY2024, 94% of grant dollars renewed an existing relationship; $383k went to new ones.

50%100%’17’18’19’20’21’22’23’24
RenewedFirst-time

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

’17’18’19’20’21’22’23’24
HealthEducationScience & TechReligionHuman ServicesArts & CultureOther
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

  • TB
    THE BRAIN TUMOR NETWORK INC
    3× · 2021–2023 · $1.6M · revenue +55% · 63% of their budget
  • CI
    CALIFORNIA INSTITUTE OF TECHNOLOGY
    7× · 2017–2024 · $1.3M · revenue +14%
  • DUKE UNIVERSITY
    7× · 2017–2024 · $985k · revenue +51%

Funded once

  • PA
    PATIENT ADVOCATE FOUNDATION
    one grant, 2020 · $200k · revenue -56%
  • YU
    YALE UNIVERSITY
    one grant, 2020 · $150k
  • MS
    MEMORIAL SLOAN-KETTERING
    one grant, 2017 · $113k
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
American Academy of Neurology

The Academy's mission is to enhance member career fulfillment and promote brain health for all.

Community Improvement
2
Memorial Sloan-Kettering Cancer Center

Leadership in the prevention, treatment, and cure of cancer through excellence, vision and cost effectiveness in patient care, outreach programs, research, and education.

Health
3
Sanford Burnham Prebys Medical Discovery Institute

Sanford burnham prebys medical discovery institute's mission is to advance the biomedical sciences by cultivating the next generation of scientific leaders, providing meaningful opportunities for researchers of all backgrounds to learn,…

Health
4
The Johns Hopkins Hospital

For more than 125 years, the mission of the johns hopkins hospital has been to lead the world in the diagnosis and treatment of disease and to train tomorrow's great physicians, nurses and scientists. above all, we aim to provide the…

Health
5
Arc Research Institute

Our mission is to accelerate scientific progress, understand the root causes of disease, and narrow the gap between discoveries and impact on patients.

Health
6
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
7
Asco Association

Asco association promotes the common business interests of its members by: (1) advocating for policies that improve the quality of cancer care; (2) maintaining the highest standards of oncology medical care through programs supporting…

Community Improvement
8
The Translational Genomics Research Institute

Please see schedule o

Health
9
Banner -University Medical Group

Assist banner health complete its mission to make health care easier so life can be better by providing integrated & coordinated care & population health management.

Health
10
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
11
The Jackson Laboratory

The purposes of the laboratory are scientific, medical, charitable, and educational. our mission is to discover precise genomic solutions for disease and empower the biomedical community.

Health
12
City of Hope

City of Hope's mission is to make hope a reality for all touched by cancer and diabetes. PLEASE SEE SCHEDULE O FOR A CONTINUATION OF OUR MISSION

Health
How this is measured
The grantee most central to the portfolio’s shape is Pacific Neuroscience Institute Foundation; the most unlike its peers is William Marsh Rice University. 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

42 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. 42 of the 77 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.

3
Load-bearing (≥25% of a budget)
4
Early backer (in before they grew)
42/42
Grantees still filing
30/42
Grew since first funded

Where the money sits, by cause and then by grantee

COMMUNITY FOUNDATION OF NE FL: $6,750,000 · OtherCOMMUNITY FOUNDATION OF NE FLSULZBACHER CENTER: $1,885,038 · OtherSULZBACHER CENTERREGENTS OF THE UNIVERSITY OF MICHIGAN: $1,286,824 · OtherREGENTS OF THE UNIVERSITY OF MICHIGANBRIGHAM & WOMEN'S HOSPITAL: $1,037,500 · OtherUNIVERSITY OF TEXAS MD ANDERSON CANCER CENTER: $800,000 · OtherUNIVERSITY OF MINNESOTA: $700,000 · OtherEMORY UNIVERSITY: $700,000 · OtherJOHN HOPKINS UNIVERSITY SCHOOL OF MEDICINE: $700,000 · Other+36 more: $7,031,560 · Other+36 moreTHE BRAIN TUMOR NETWORK INC: $1,550,000 · HealthTHE BRAIN TUMOR NETW…HEALTH RESEARCH ALLIANCE INC: $825,000 · HealthHEALTH RESEARCH ALLI…Children's Hospital Corporation: $825,000 · HealthChildren's Hospital …Dana-Farber Cancer Institute Inc: $680,349 · HealthDana-Farber Cancer I…CHILDREN'S NATIONAL REHABILITATION AND SPECIALIZED CARE: $562,500 · HealthCHILDREN'S NATIONAL …CONQUER CANCER FOUNDATION OF THE AMERICAN SOCIETY OF CLINICAL ONCOLOGY: $405,000 · HealthCONQUER CANCER FOUND…THE MARK FOUNDATION FOR CANCER RESEARCH (US) LTD: $300,000 · Health+8 more: $505,000 · Health+8 moreCALIFORNIA INSTITUTE OF TECHNOLOGY: $1,262,500 · EducationCALIFORNIA INSTI…DUKE UNIVERSITY: $984,949 · EducationDUKE UNIVERSITYNew York University: $600,000 · EducationNew York Univers…William Marsh Rice University: $337,500 · EducationWilliam Marsh Ri…UNIVERSITY OF PITTSBURGH: $337,500 · EducationUNIVERSITY OF PI…Massachusetts Institute of Technology: $300,000 · EducationMassachusetts In…Baylor College of Medicine: $287,500 · EducationBaylor College o…Cornell University: $262,500 · EducationCornell Universi…PATIENT ADVOCATE FOUNDATION: $200,000 · Education+2 more: $135,000 · EducationSociety for Neuro-Oncology: $462,113 · Arts & CultureCOLD SPRING HARBOR LABORATORY: $112,500 · Science & TechPACIFIC NEUROSCIENCE INSTITUTE FOUNDATION: $100,000 · Science & TechBeaches Emergency Assistance Ministry I Inc: $65,000 · ReligionDIVINE MERCY MINISTRIES INC: $10,000 · ReligionCOMMUNITY HOSPICE OF NORTHEAST FLORIDA: $10,000 · Human ServicesSEAMARK RANCH INC: $10,000 · Human Services
Other$20,890,922Health$5,652,849Education$4,707,449Arts & Culture$462,113Science & Tech$212,500Religion$75,000Human Services$20,000

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 budgetTHE BRAIN TUMOR NETWORK INC: $1,550,000 over 3y, 63% of budgetCALIFORNIA INSTITUTE OF TECHNOLOGY: $1,262,500 over 7y, 0.0% of budgetDUKE UNIVERSITY: $984,949 over 7y, 0.0% of budgetHEALTH RESEARCH ALLIANCE INC: $825,000 over 3y, 51% of budgetChildren's Hospital Corporation: $825,000 over 4y, 0.0% of budgetDana-Farber Cancer Institute Inc: $680,349 over 6y, 0.0% of budgetNew York University: $600,000 over 5y, 0.0% of budgetCHILDREN'S NATIONAL REHABILITATION AND SPECIALIZED CARE: $562,500 over 4y, 0.5% of budgetSociety for Neuro-Oncology: $462,113 over 8y, 4.5% of budgetCONQUER CANCER FOUNDATION OF THE AMERICAN SOCIETY OF CLINICAL ONCOLOGY: $405,000 over 4y, 0.5% of budgetWilliam Marsh Rice University: $337,500 over 3y, 0.0% of budgetUNIVERSITY OF PITTSBURGH: $337,500 over 3y, 0.0% of budgetWESTJAX OUTREACH INC COMMUNITY HEALTH OUTREACH: $322,810 over 3y, 41% of budgetTHE MARK FOUNDATION FOR CANCER RESEARCH (US) LTD: $300,000 over 1y, 0.7% of budgetMassachusetts Institute of Technology: $300,000 over 3y, 0.0% of budgetBaylor College of Medicine: $287,500 over 2y, 0.0% of budgetCornell University: $262,500 over 3y, 0.0% of budgetPATIENT ADVOCATE FOUNDATION: $200,000 over 1y, 0.1% of budgetTHE CHILDREN'S HOSPITAL OF PHILADELPHIA: $187,500 over 2y, 0.0% of budgetAmerican Association for Cancer Research Inc: $167,000 over 2y, 0.1% of budgetNATIONAL BRAIN TUMOR SOCIETY INC: $150,000 over 4y, 0.4% of budgetCENTRAL BRAIN TUMOR REGISTRY OF THE UNITED STATES: $120,000 over 8y, 18% of budgetCOLD SPRING HARBOR LABORATORY: $112,500 over 1y, 0.1% of budgetAmerican Brain Tumor Association: $110,000 over 2y, 1.1% of budgetPACIFIC NEUROSCIENCE INSTITUTE FOUNDATION: $100,000 over 1y, 1.5% of budgetTHE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY: $100,000 over 1y, 0.0% of budgetBeaches Emergency Assistance Ministry I Inc: $65,000 over 2y, 1.6% of budgetPediatric Brain Tumor Foundation of the United States Inc: $50,000 over 1y, 0.8% of budgetFred Hutchinson Cancer Center: $37,500 over 1y, 0.0% of budgetTHE UNIVERSITY OF FLORIDA FOUNDATION INC: $35,000 over 3y, 0.0% of budgetMission Brain Foundation: $30,000 over 2y, 4.5% of budgetFOCUSED ULTRASOUND FOUNDATION: $20,000 over 1y, 0.2% of budgetDIVINE MERCY MINISTRIES INC: $10,000 over 1y, 4.1% of budgetThe Arc Jacksonville Inc: $10,000 over 1y, 0.1% of budgetCOMMUNITY HOSPICE OF NORTHEAST FLORIDA: $10,000 over 1y, 0.0% of budgetSEAMARK RANCH INC: $10,000 over 1y, 0.2% of budgetMaliVai Washington Kids Foundation Inc: $10,000 over 1y, 0.3% of budgetPINE CASTLE INC: $10,000 over 1y, 0.1% of budgetOperation New Hope Inc: $10,000 over 1y, 0.1% of budgetST VINCENT'S FOUNDATION INC: $10,000 over 1y, 0.1% of budgetAMERICAN SOCIETY OF CLINICAL ONCOLOGY INC: $3,000 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.

  • Who funds THE BRAIN TUMOR NETWORK INC ↗
  • Who funds CALIFORNIA INSTITUTE OF TECHNOLOGY ↗
  • Who funds DUKE UNIVERSITY ↗
  • Who funds HEALTH RESEARCH ALLIANCE INC ↗
  • Who funds Children's Hospital Corporation ↗
  • Who funds Dana-Farber Cancer Institute Inc ↗
  • Who funds New York University ↗
  • Who funds CHILDREN'S NATIONAL REHABILITATION AND SPECIALIZED CARE ↗
  • Who funds Society for Neuro-Oncology ↗
  • Who funds CONQUER CANCER FOUNDATION OF THE AMERICAN SOCIETY OF CLINICAL ONCOLOGY ↗
  • Who funds William Marsh Rice University ↗
  • Who funds UNIVERSITY OF PITTSBURGH ↗
  • Who funds WESTJAX OUTREACH INC COMMUNITY HEALTH OUTREACH ↗
  • Who funds THE MARK FOUNDATION FOR CANCER RESEARCH (US) LTD ↗
  • Who funds Massachusetts Institute of Technology ↗
  • Who funds Baylor College of Medicine ↗
  • Who funds Cornell University ↗
  • Who funds PATIENT ADVOCATE FOUNDATION ↗
  • Who funds THE CHILDREN'S HOSPITAL OF PHILADELPHIA ↗
  • Who funds American Association for Cancer Research 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.

The Community Foundat…United Way of Northea…Jacksonville Jaguars …Pga Tour IncThe Jim Moran Foundat…Blue Cross Blue Shiel…The Thomas M and Iren…Lucy Gooding Charitab…Southern Baptist Hosp…The Schultz Foundatio…Stellar FoundationThe Gate Foundation I…
The Community Foundation for Northeast Florida IncFL29.5× affinity12 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: The Community Foundation for Northeast Florida Inc · United Way of Northeast Florida Inc · Jacksonville Jaguars Foundation Inc · Pga Tour Inc · The Jim Moran Foundation Inc · Blue Cross Blue Shield of Florida Foundation · The Thomas M and Irene Kirbo Charitable Foundation · Lucy Gooding Charitable Foundation Trust · Southern Baptist Hospital of Florida Inc · The Schultz Foundation Inc · Stellar Foundation · The Gate 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 Sontag Foundation funds: left to right is the share of its income from government, bottom to top the share from Sontag Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 60%5%19%42%75%funder's share of their income ↑0%23%45%68%90%share of the org’s income from government →median 10%
  • Massachusetts Institute of Technology: 35% of income from government
  • Operation New Hope Inc: 13% of income from government
  • Children's Hospital Corporation: 10% of income from government
  • Dana-Farber Cancer Institute Inc: 7% of income from government
  • Westjax Outreach Inc Community Health Outreach: 2% of income from government
  • Pine Castle Inc: 0% of income from government
no gov moneyreceives it· size = income
6get no government money at all
4report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–90%
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 Sontag Foundation?

Find your warmest path to Sontag 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 77 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 Sontag’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