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Peter & Susan Solomon Family Foundation at a glance

· Private foundation

Peter & Susan Solomon Family Foundation

Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$960k
Granted FY2025still arriving
58
Grants FY2025still arriving
9
States reached
$521k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0196% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2021 to 2025.

Education$3.1MHealth$2.4MArts & Culture$1.3MPhilanthropy$66kYouth Development$45kReligion$44kEnvironment$27kInternational$23kOther$0
02FY2025 · 58 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k51 grants · $112k
  • $10k–50k2 grants · $43k
  • $50k–250k4 grants · $284k
  • $250k+1 grant · $521k
$1,000
Median grant
9
States reached
$8.4M
Total assets
Largest grants
RecipientAmount
MEMORIAL SLOAN-KETTERING CANCER CENTER$521,000
PRESIDENT & FELLOWS OF HARVARD COLLEGE$119,278
MAHNHATTAN THEATRE CLUB$60,000
AMERICAN MUSEUM OF NATURAL HISTORY$55,000
UJAFEDERATION$50,000
RIVERSIDE THEATRE$23,000
ABRAHAM JOSHUA HESCHEL SCHOOL$20,000
COUNCIL ON FOREIGN RELATIONS$8,140
STUDENT LEADERSHIP NETWORK$7,500
TEMPLE EMANU-EL$7,500
CONGREGATION EMANU-EL$5,400
AMERICAN RIVERS$5,000
CONSTELLATION FOUNDATION$5,000
THE GATEWAY SCHOOL$5,000
THE NIGHTINGALE BAMFORD SCHOOL$5,000
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 (FY23–25, $4k) land where the poverty rate runs at 16%, against an area that typically sits at 11%. 86% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%SAFE HORIZONS: $1k → 17%ELENOR WHITMORE EARLY CHILDHOOD CENTER: $500 → 7%SAFE HORIZONS: $1k → 17%SAFE HORIZONS: $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

NY
MA
PA
CT
VA
MD
DC
LA
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.

84%of every dollar goes to organizations it has funded before.
$8.0M · 40 repeat orgs$1.5M to everyone else

Grantees it renews have grown median revenue +16% since the first grant, against 0% for those funded once.

40 repeat relationships: 32 still active in FY2025, 8 since wound down; 25 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

40
26

Total granted

$8.0M
$1.5M

Median revenue growth · since first grant

+16%
0%

Still filing today

73%
50%

New vs renewed · share of each year

In FY2025, 89% of grant dollars renewed an existing relationship; $89k went to new ones.

50%100%’21’22’23’24’25
RenewedFirst-time

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

’21’22’23’24’25
EducationArts & CultureHealthPhilanthropyEnvironmentHuman 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

  • AM
    American Museum of Natural History
    3× · 2023–2025 · $989k · revenue +8%
  • MT
    MANHATTAN THEATRE CLUB INC
    3× · 2023–2025 · $175k · revenue +53%
  • AJ
    ABRAHAM JOSHUA HESCHEL SCHOOL
    3× · 2023–2025 · $50k · revenue +26%

Funded once

  • HU
    HAVARD UNIVERSITY CENTER FOR JEWISH STUDIES
    one grant, 2023 · $1.2M
  • TA
    TARGET ALS FOUNDATION INC
    one grant, 2024 · $100k · revenue -36%
  • HU
    HAVARD UNIVERSITY - MANUSCRIPTS AT COST
    one grant, 2023 · $54k
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
The Jewish Museum

The mission of the jewish museum is to collect, preserve, exhibit and interpret art and jewish culture. see schedule o for more information.

Arts & Culture
3
Rhode Island School of Design

The mission of rhode island school of design, through its college and museum,is to educate its students and the public in the creation and (see schedule o)appreciation of works of art and design, to discover and transmit knowledge and to…

Education
4
Governors Island Corporation

The governors island corporation, doing business as the trust for governors island, is the 501(c)(3) not-for-profit organization created by the city of new york and charged with the planning, redevelopment and ongoing operations of 150…

Animals
5
Manhattanville University

To educate students to be ethical and socially responsible leaders in a global community.

Education
6
The Brooklyn Institute of Arts and Sciences

The mission of the brooklyn institute of arts and sciences, d/b/a brooklyn museum (the "museum") is to bring people together through art and experiences that inspire celebration, compassion, courage, and the will to act. (see schedule o).

Arts & Culture
7
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
8
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.

—
9
Massachusetts Institute of Technology

The mission of mit is to advance knowledge and educate students in science, technology, and other areas of scholarship that will best serve the nation and the world in the 21st century.

Education
10
New York Botanical Garden

The new york botanical garden is a museum of plants and a scientific research center devoted to the study of plants and their uses. it is the garden's mission to improve public understanding of the natural world, horticulture, and the…

Environment
11
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
12
The Pierpont Morgan Library

The Morgan Library & Museum celebrates and shares the history and process of human creativity from antiquity to the present day through the preservation, study, and interpretation of a dynamic and growing collection.

Education
How this is measured
The grantee most central to the portfolio’s shape is New York Landmarks Conservancy Inc; the most unlike its peers is Friends of Bossinc. 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

64 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. 64 of the 92 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)
9
Early backer (in before they grew)
62/64
Grantees still filing
37/64
Grew since first funded

Where the money sits, by cause and then by grantee

DETAILS ARE VOLUMINOUS & AVAILABLE AT B STRAUSS ASSOC LTD: $4,110,118 · OtherDETAILS ARE VOLUMINOUS & AVAILABLE AT B STRAUSS ASSOC LTDMEMORIAL SLOAN-KETTERING CANCER CENTER: $2,257,607 · OtherMEMORIAL SLOAN-KETTERING CANCER CENTERHAVARD UNIVERSITY CENTER FOR JEWISH STUDIES: $1,216,215 · OtherHAVARD UNIVERSITY CENTER FOR JEWISH STUDIES+42 more: $270,785 · OtherPresident and Fellows of Harvard College: $1,619,278 · EducationPresident and Fell…TARGET ALS FOUNDATION INC: $100,000 · EducationTARGET ALS FOUNDAT…+14 more: $146,600 · Education+14 moreAmerican Museum of Natural History: $989,355 · Arts & CultureAmerican Mus…MANHATTAN THEATRE CLUB INC: $175,000 · Arts & CultureMANHATTAN TH…+11 more: $48,661 · Arts & CultureUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $50,000 · PhilanthropySTUDENT LEADERSHIP NETWORK INC: $37,500 · PhilanthropyTHE JOHN'S ISLAND FOUNDATION INC: $9,000 · PhilanthropyRILEY'S WAY FOUNDATION INC: $7,500 · PhilanthropyUNITED WAY OF INDIAN RIVER COUNTY INC: $7,000 · Philanthropy+1 more: $2,200 · PhilanthropyINDIAN RIVER HOSPITAL FOUNDATION INC: $50,000 · HealthBLOOD CANCER UNITED INC: $2,300 · Health+5 more: $4,500 · HealthAMERICAN RIVERS INC: $20,000 · EnvironmentEAST HAMPTON VILLAGE FOUNDATION: $4,000 · EnvironmentINDIAN RIVER LAND TRUST INC: $1,500 · EnvironmentTHE EVERGLADES FOUNDATION INC: $1,000 · EnvironmentCOUNCIL ON FOREIGN RELATIONS INC: $18,210 · International
Other$7,854,725Education$1,865,878Arts & Culture$1,213,016Philanthropy$113,200Health$56,800Environment$26,500International$18,210

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 budgetPresident and Fellows of Harvard College: $1,619,278 over 2y, 0.0% of budgetAmerican Museum of Natural History: $989,355 over 3y, 0.3% of budgetMANHATTAN THEATRE CLUB INC: $175,000 over 3y, 0.3% of budgetTARGET ALS FOUNDATION INC: $100,000 over 1y, 0.2% of budgetABRAHAM JOSHUA HESCHEL SCHOOL: $50,000 over 3y, 0.0% of budgetUNITED JEWISH APPEAL-FEDERATION OF JEWISH PHILANTHROPIES OF NEW YORK INC: $50,000 over 1y, 0.0% of budgetEAST HAMPTON LIBRARY: $50,000 over 1y, 1.3% of budgetSTUDENT LEADERSHIP NETWORK INC: $37,500 over 3y, 0.1% of budgetTrustees of Tufts College: $30,500 over 2y, 0.0% of budgetMETROPOLITAN MUSEUM OF ART: $24,000 over 2y, 0.0% of budgetAMERICAN RIVERS INC: $20,000 over 3y, 0.0% of budgetPOLY PREP COUNTRY DAY SCHOOL: $20,000 over 3y, 0.0% of budgetCOUNCIL ON FOREIGN RELATIONS INC: $18,210 over 3y, 0.0% of budgetTHE NIGHTINGALE-BAMFORD SCHOOL: $15,000 over 3y, 0.0% of budgetTHE TAFT SCHOOL CORPORATION: $15,000 over 3y, 0.0% of budgetALZHEIMER'S DRUG DISCOVERY FOUNDATION: $10,000 over 1y, 0.0% of budgetTHE JOHN'S ISLAND FOUNDATION INC: $9,000 over 3y, 0.2% of budgetRILEY'S WAY FOUNDATION INC: $7,500 over 3y, 0.1% of budgetUNITED WAY OF INDIAN RIVER COUNTY INC: $7,000 over 2y, 0.1% of budgetVERO BEACH MUSEUM OF ART INC: $6,000 over 2y, 0.0% of budgetLONGHOUSE RESERVE: $5,500 over 2y, 0.3% of budgetTHE PARRISH ART MUSEUM INC: $5,000 over 1y, 0.0% of budgetMuseum of Modern Art: $4,500 over 2y, 0.0% of budgetSESAME WORKSHOP: $3,500 over 2y, 0.0% of budgetNEW YORK PUBLIC RADIO: $3,000 over 3y, 0.0% of budgetSAFE HORIZON INC: $3,000 over 3y, 0.0% of budgetAMERICAN JEWISH COMMITTEE: $3,000 over 3y, 0.0% of budgetETHICAL CULTURE FIELDSTON SCHOOL: $2,500 over 1y, 0.0% of budgetTHE BREARLEY SCHOOL: $2,500 over 1y, 0.0% of budgetBLOOD CANCER UNITED INC: $2,300 over 3y, 0.0% of budgetQUAIL VALLEY CHARITIES INC: $2,200 over 2y, 0.1% of budgetPREP FOR PREP: $2,000 over 3y, 0.0% of budgetNEW YORK LANDMARKS CONSERVANCY INC: $2,000 over 1y, 0.0% of budgetINDIAN RIVER LAND TRUST INC: $1,500 over 2y, 0.0% of budgetTHE EVERGLADES FOUNDATION INC: $1,000 over 1y, 0.0% of budgetSAG HARBOR PARTNERSHIP INC: $1,000 over 1y, 0.1% of budgetNEW YORK JUNIOR TENNIS LEAGUE INC: $1,000 over 1y, 0.0% of budgetLITERACY SERVICES OF INDIAN RIVER COUNTY INC: $1,000 over 2y, 0.2% of budgetFRIENDS OF BOSSINC: $1,000 over 1y, 0.6% of budgetSOCIETY OF ILLUSTRATORS INC: $961 over 3y, 0.0% of budgetPHILLIPS BROOKS HOUSE ASSOCIATION INC: $600 over 2y, 0.0% of budgetCARNEGIE HILL NEIGHBORS INC: $500 over 1y, 0.0% of budgetTREASURE COAST COMMUNITY HEALTH FOUNDATION INC: $500 over 1y, 0.1% of budgetCOLLEGIATE SCHOOL INC: $500 over 1y, 0.0% of budgetJUNIOR TENNIS CHAMPIONS CENTER INC: $500 over 1y, 0.0% of budgetNORTHSIDE CENTER FOR CHILD DEVELOPMENT INC: $500 over 1y, 0.0% of budgetTHE LADIES VILLAGE IMPROVEMENT SOCIETY OF EAST HAMPTON: $250 over 1y, 0.0% of budgetTREASURE COAST FOOD BANK INC: $200 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.

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 Maryam and Hervey…The Donald and Barbar…Daniel M Neidich & Br…Indian River Communit…Gs Donor Advised Phil…The Goldman Sachs Cha…FjcThe Ayco Charitable F…Federated Foundations…The Thomas J Edelman …Alfred & Jane Ross Fo…
Jewish Communal FundNY25.5× affinity16 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Jewish Communal Fund · The Maryam and Hervey Seley Foundation · The Donald and Barbara Zucker Family Foundation · Daniel M Neidich & Brooke Garber Foundation · Indian River Community Foundation Inc · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · The Goldman Sachs Charitable Gift Fund · Fjc · The Ayco Charitable Foundation · Federated Foundations Inc · The Thomas J Edelman Foundation · Alfred & Jane Ross 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 Peter & Susan Solomon Family Foundation funds: left to right is the share of its income from government, bottom to top the share from Peter & Susan Solomon Family Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 90%0%1%3%5%funder's share of their income ↑0%23%45%68%90%share of the org’s income from government →median 4%
  • Treasure Coast Community Health Inc: 17% of income from government
  • Trustees of Tufts College: 13% of income from government
  • President and Fellows of Harvard College: 7% of income from government
  • Florida Sheriffs Association Inc: 4% of income from government
  • Treasure Coast Food Bank Inc: 2% of income from government
  • United Way of Indian River County Inc: 1% of income from government
  • Indian River Land Trust Inc: 0% of income from government
no gov moneyreceives it· size = income
9get no government money at all
19report 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 Peter & Susan Solomon Family Foundation?

Find your warmest path to Peter & Susan Solomon Family 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 92 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 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

Play a game based on Peter & Susan Solomon 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