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Joseph & Sylvia Slifka Foundation Inc at a glance

· Private foundation

Joseph & Sylvia Slifka Foundation Inc

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.

$3.6M
Granted FY2025still arriving
17
Grants FY2025still arriving
3
States reached
$650k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0198% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Arts & Culture$12MHuman Services$6.4MPhilanthropy$3.5MReligion$2.5MEducation$2.2MAnimals$1.6MYouth Development$1.6MEnvironment$1.5MOther$0
02FY2025 · 17 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k1 grant · $1k
  • $10k–50k6 grants · $78k
  • $50k–250k4 grants · $250k
  • $250k+6 grants · $3.3M
$50,000
Median grant
3
States reached
$15M
Total assets
Largest grants
RecipientAmount
THE INTERFAITH CENTER OF NEW YORK$650,000
PUBLICOLOR INC$600,000
ANIMAL RESCUE FUND OF THE HAMPTONS INC$530,000
BRIDGEHAMPTON CHILD CARE & RECREATIONAL CENTER$502,500
NEW YORK CITY BALLET INC$500,000
SOLOMON R GUGGENHEIM FOUNDATION$500,000
THE MUSEUM OF FINE ARTS HOUSTON$100,000
JULLIARD SCHOOL$50,000
THE ANIMAL MEDICAL CENTER DBA STEPHEN & CHRISTINE SCHWARZMAN ANIMAL MEDICAL$50,000
SCAN-HARBOR INC$50,000
CONGREGATION EMANU EL OF THE CITY OF NY$25,000
METROPOLITAN MUSEUM OF ART$12,500
BEST FRIENDS ANIMAL SOCIETY$10,000
STEPHEN WISE FREE SYNAGOGUE$10,000
GUILD HALL OF EAST HAMPTON INC$10,000
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 (FY20–25, $4.8M) land where the poverty rate runs at 7%, against an area that typically sits at 12%. 0% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 12%ISRAEL GUIDE DOG CENTER FOR THE BLIND: $300k → 6%MORSE LIFE FOUNDATION: $10k → 11%ISRAEL GUIDE DOG CENTER FOR THE BLIND: $30k → 6%ISRAEL GUIDE DOG CENTER FOR THE BLIND: $30k → 6%RETREAT INC: $400k → 7%RETREAT INC: $200k → 7%RETREAT INC: $80k → 7%RETREAT INC: $30k → 7%BRIDGEHAMPTON CHILD CARE & RECREATIONAL: $2.8M → 7%BRIDGEHAMPTON CHILD CARE & RECREATIONAL CENTER: $503k → 7%BRIDGEHAMPTON CHILD CARE & RECREATIONAL: $500k → 7%BRIDGEHAMPTON CHILD CARE & RECREATIONAL: $5k → 7%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.
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.

90%of every dollar goes to organizations it has funded before.
$27M · 24 repeat orgs$3.0M to everyone else

Grantees it renews have grown median revenue +47% since the first grant, against 0% for those funded once.

24 repeat relationships: 12 still active in FY2025, 12 since wound down; 5 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

24
15

Total granted

$27M
$2.9M

Median revenue growth · since first grant

+47%
0%

Still filing today

88%
53%

New vs renewed · share of each year

In FY2025, 98% of grant dollars renewed an existing relationship; $84k went to new ones.

50%100%’17’20’21’22’23’24’25
RenewedFirst-time

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

’17’20’21’22’23’24’25
Arts & CultureEducationAnimalsHuman ServicesEnvironmentEmploymentOther
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

  • NY
    NEW YORK CITY BALLET INC
    6× · 2017–2025 · $6.5M · revenue +21%
  • SR
    SOLOMON R GUGGENHEIM FOUNDATION
    6× · 2017–2025 · $2.6M · revenue +43%
  • IC
    INTERFAITH CENTER OF NEW YORK INC
    7× · 2017–2025 · $2.4M · revenue +101% · 58% of their budget

Funded once

  • LR
    LONGHOUSE RESERVE
    one grant, 2021 · $1.3M · revenue -69%
  • TG
    THE GRADUATE CENTER FOUNDATION INCgraduated
    one grant, 2017 · $500k · revenue +147%
  • AO
    ARF OF THE HAMPTONS CAPITAL FD
    one grant, 2021 · $400k
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 Museum of Natural History

The museum's mission statement is: "to discover, interpret, and disseminate - through scientific research and education - knowledge about human cultures, the natural world, and the universe."

Arts & Culture
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
Museum of the City of New York

The museum of the city of new york fosters understanding of the distinctive nature of urban life in the world's most influential metropolis. it engages visitors by celebrating, documenting, and interpreting the city's past, present, and…

Arts & Culture
4
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
5
The Neue Galerie New York
Arts & Culture
6
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
7
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
8
Museum of Modern Art

The Museum of Modern Art is a private, non-profit institution chartered by the State of New York Department of Education in 1929 to foster public awareness of modern and contemporary art. (Continued in Schedule O)

Arts & Culture
9
The Long Island Museum of American Art History & Carriages

The long island museum is dedicated to inspiring people of all ages with an understanding and enjoyment of american art, history and carriages as expressed through the heritage of long island and its diverse communities.

Arts & Culture
10
Bard College

Bard college seeks to provide a challenging academic program and a supportive environment that fosters a collaborative interchange of ideas in the classroom as well as ambition to achieve excellence.

Education
11
Isabella Stewart Gardner Museum Inc

Organization's mission statement true to the ambitious vision of its founder and her spirit of creative risk-taking, the mission of the isabella stewart gardner museum is: - to bring to life and preserve the rich historic collection; - to…

Arts & Culture
12
Henry E Huntington Library and Art Gallery

The huntington library, art museum, and botanical gardens shares its world-renowned collections to support scholarship, foster learning, inspire creativity, and offer transformative experiences for diverse audiences.

Arts & Culture
How this is measured
The grantee most central to the portfolio’s shape is The New York Public Library Astor Lenox and Tilden Foundations; the most unlike its peers is Wildlife Conservation Society. 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

36 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. 36 of the 46 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)
6
Early backer (in before they grew)
36/36
Grantees still filing
24/36
Grew since first funded

Where the money sits, by cause and then by grantee

NEW YORK CITY BALLET INC: $6,550,000 · Arts & CultureNEW YORK CITY BALLET INCSOLOMON R GUGGENHEIM FOUNDATION: $2,650,000 · Arts & CultureSOLOMON R GUGGENHEIM FOUNDATIONBYRD HOFFMAN WATER MILL FOUNDATION: $1,050,000 · Arts & CultureBYRD HOFFMAN WATER MILL FOUNDATIONTHE MUSEUM OF FINE ARTS HOUSTON: $700,000 · Arts & CultureTHE MUSEUM OF FINE ARTS HOUSTON+4 more: $597,500 · Arts & CultureINTERFAITH CENTER OF NEW YORK INC: $2,415,000 · OtherINTERFAITH CENTER OF…SCAN-HARBOR INC: $800,000 · OtherSCAN-HARBOR INCTHE NATURE CONSERVANCY: $525,000 · OtherTHE NATURE CONSERVAN…THE GRADUATE CENTER FOUNDATION INC: $500,000 · OtherTHE GRADUATE CENTER …ARF OF THE HAMPTONS CAPITAL FD: $400,000 · OtherARF OF THE HAMPTONS …UJA Federation of Jewish Philanthropies: $400,000 · OtherUJA Federation of Je…JOAN & SANFORD I WEILL MED COLLEGE: $200,000 · Other+12 more: $752,000 · Other+12 moreBridgehampton Child Care and Recreational Center Inc: $3,767,500 · Human ServicesBridgehampton Chil…ISRAEL GUIDE DOG CENTER FOR THE BLIND: $860,000 · Human ServicesISRAEL GUIDE DOG C…Retreat Inc: $810,000 · Human ServicesRetreat Inc+2 more: $60,000 · Human ServicesPUBLICOLOR INC: $1,625,000 · EducationPUBLICOLOR INCLONGHOUSE RESERVE: $1,250,000 · EducationLONGHOUSE RESER…Fordham University: $800,000 · EducationFordham Univers…The New York Public Library Astor Lenox and Tilden Foundations: $800,000 · EducationThe New York Pu…+2 more: $55,000 · EducationJEWISH COMMUNAL FUND: $2,700,000 · PhilanthropyJEWISH CO…ANIMAL RESCUE FUND OF THE HAMPTONS INC: $955,000 · AnimalsTHE ANIMAL MEDICAL CENTER: $350,000 · AnimalsWildlife Conservation Society: $300,000 · Animals+2 more: $21,500 · AnimalsPECONIC LAND TRUST INC: $610,000 · EnvironmentMADOO CONSERVANCY INC: $385,000 · Environment
Arts & Culture$11,547,500Other$5,992,000Human Services$5,497,500Education$4,530,000Philanthropy$2,700,000Animals$1,626,500Environment$995,000

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 budgetNEW YORK CITY BALLET INC: $6,550,000 over 6y, 5.0% of budgetBridgehampton Child Care and Recreational Center Inc: $3,767,500 over 4y, 59% of budgetJEWISH COMMUNAL FUND: $2,700,000 over 5y, 0.2% of budgetSOLOMON R GUGGENHEIM FOUNDATION: $2,650,000 over 6y, 2.5% of budgetINTERFAITH CENTER OF NEW YORK INC: $2,415,000 over 7y, 58% of budgetPUBLICOLOR INC: $1,625,000 over 6y, 16% of budgetLONGHOUSE RESERVE: $1,250,000 over 1y, 20% of budgetBYRD HOFFMAN WATER MILL FOUNDATION: $1,050,000 over 5y, 20% of budgetANIMAL RESCUE FUND OF THE HAMPTONS INC: $955,000 over 4y, 5.2% of budgetISRAEL GUIDE DOG CENTER FOR THE BLIND: $860,000 over 4y, 11% of budgetRetreat Inc: $810,000 over 5y, 6.3% of budgetSCAN-HARBOR INC: $800,000 over 6y, 1.3% of budgetFordham University: $800,000 over 3y, 0.1% of budgetThe New York Public Library Astor Lenox and Tilden Foundations: $800,000 over 4y, 0.1% of budgetTHE MUSEUM OF FINE ARTS HOUSTON: $700,000 over 7y, 0.1% of budgetPECONIC LAND TRUST INC: $610,000 over 3y, 7.1% of budgetTHE NATURE CONSERVANCY: $525,000 over 3y, 0.0% of budgetTHE GRADUATE CENTER FOUNDATION INC: $500,000 over 1y, 4.1% of budgetMADOO CONSERVANCY INC: $385,000 over 3y, 47% of budgetTHE ANIMAL MEDICAL CENTER: $350,000 over 4y, 0.4% of budgetHALCYON FOUNDATION: $350,000 over 2y, 17% of budgetWildlife Conservation Society: $300,000 over 3y, 0.0% of budgetTHE PARRISH ART MUSEUM INC: $225,000 over 2y, 2.5% of budgetCAREERS THROUGH CULINARY ARTS PROGRAM DBA CULINARY CAREERS PROGRAM: $180,000 over 2y, 2.6% of budgetHOUR CHILDREN INC: $50,000 over 1y, 1.1% of budgetBROOKLYN ACADEMY OF MUSIC INC: $50,000 over 1y, 0.1% of budgetJUILLIARD SCHOOL: $50,000 over 1y, 0.0% of budgetBEST FRIENDS ANIMAL SOCIETY: $20,000 over 2y, 0.0% of budgetMETROPOLITAN MUSEUM OF ART: $12,500 over 1y, 0.0% of budgetMORSELIFE FOUNDATION INC: $10,000 over 1y, 0.1% of budgetNEW YORK EDGE INC: $10,000 over 1y, 0.0% of budgetHAMPTON LIBRARY IN BRIDGEHAMPTON INC: $5,000 over 1y, 0.2% of budgetEvelyn Alexander Wildlife Rescue Center Inc: $1,500 over 1y, 0.2% of budgetTHE LADIES VILLAGE IMPROVEMENT SOCIETY OF EAST HAMPTON: $1,000 over 1y, 0.1% 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 Goldman Sachs Cha…FjcThe New York Communit…Cal Foundation IncNational Philanthropi…The Campbell Family F…Corner Foundation IncThe Donald and Barbar…Boston Foundation IncGs Donor Advised Phil…Morgan Stanley Global…
Jewish Communal FundNY23.7× affinity12 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Jewish Communal Fund · The Goldman Sachs Charitable Gift Fund · Fjc · The New York Community Trust · Cal Foundation Inc · National Philanthropic Trust · The Campbell Family Foundation · Corner Foundation Inc · The Donald and Barbara Zucker Family Foundation · Boston Foundation Inc · Gs Donor Advised Philanthropy Fund for Wealth Management Inc · Morgan Stanley Global Impact Funding Trust 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 Joseph & Sylvia Slifka Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from Joseph & Sylvia Slifka Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 10%4%15%34%60%funder's share of their income ↑0%10%20%30%40%share of the org’s income from government →
    no gov moneyreceives it· size = income
    1get no government money at all
    13report 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.
    05Through Plinth

    Warm introductions · Powered by PlinthPlus

    How do I get to Joseph & Sylvia Slifka Foundation Inc?

    Find your warmest path to Joseph & Sylvia Slifka Foundation Inc 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 46 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 Joseph & Sylvia Slifka’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