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The James S Marcus Foundation at a glance

· Private foundation

The James S Marcus Foundation

Its FY2026 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$285k
Granted FY2025still arriving
12
Grants FY2025still arriving
5
States reached
$100k
Largest
01What it fundsRead
02Its granteesRead
03Its fieldRead
04Through PlinthRead
01What it funds
0192% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2025.

Arts & Culture$805kHealth$57kEducation$28kAnimals$23kReligion$19kRecreation & Sports$18kHuman Services$10kCommunity Improvement$2kOther$0
02FY2025 · 12 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k6 grants · $23k
  • $10k–50k4 grants · $110k
  • $50k–250k2 grants · $150k
$10,000
Median grant
5
States reached
$2.5M
Total assets
Largest grants
RecipientAmount
WNET$100,000
Young Concert Artists Inc$50,000
Metropolitan Opera Association Inc$40,000
Mastervoices Inc$35,000
Pianofest Inc$25,000
New York City Center Inc$10,000
Hands Inc$5,000
The Perlman Music Program$5,000
American Nurses Foundation Inc$5,000
City Parks Foundation Inc$5,000
St. Lukes Chamber Ensemble Inc$1,500
American Cancer Society Inc$1,000
02Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

72%of every dollar goes to organizations it has funded before.
$710k · 25 repeat orgs$271k to everyone else

Grantees it renews have grown median revenue +33% since the first grant, against +13% for those funded once.

25 repeat relationships: 10 still active in FY2025, 15 since wound down; 2 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

25
32

Total granted

$710k
$181k

Median revenue growth · since first grant

+33%
+13%

Still filing today

88%
63%

New vs renewed · share of each year

In FY2025, 68% of grant dollars renewed an existing relationship; $90k went to new ones.

50%100%’20’23’24’25
RenewedFirst-time

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

’20’23’24’25
Arts & CultureEducationHealthAnimalsReligionRecreation & SportsOther
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

  • GH
    GUILD HALL OF EAST HAMPTON INC
    2× · 2020–2024 · $115k · revenue +159%
  • NY
    NEW YORK CITY CENTER INC
    4× · 2020–2025 · $49k · revenue +45%
  • MI
    MASTERVOICES INC
    3× · 2020–2025 · $44k · revenue +33%

Funded once

  • NY
    NEW YORK FESTIVAL OF SONG
    one grant, 2020 · $25k
  • MM
    METROPOLITAN MUSEUM OF ARTgraduated
    one grant, 2020 · $25k · revenue +119%
  • AM
    AMERICAN MODERN OPERA COMPANYgraduated
    one grant, 2020 · $25k · revenue +390%
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.

03Its 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
San Francisco Opera Association

We believe opera is a uniquely compelling, entertaining and emotionally thrilling art form. our mission is to bring together growing audiences to experience opera's transformative power.

Arts & Culture
2
Manhattan School of Music

Manhattan school of music is deeply committed to excellence in education, performance, and creative activity; to the humanity of the school's environment; and to the cultural enrichment of the larger community. a premiere international…

Arts & Culture
3
New York Public Radio

To make the mind more curious, the heart more open, and the spirit more joyful through excellent audio programming that is deeply rooted in new york.

Arts & Culture
4
Foundation for Modern Opera
—
5
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
6
Elaine Kaufman Cultural Center Lucy Moses School for Music and Dance

Kaufman music center stimulates appreciation of and participation in music through music performance and education in ways that awaken creativity, advance innovation, and create a sense of wonder among performers, students, teachers, and…

Arts & Culture
7
The Neue Galerie New York
Arts & Culture
8
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
9
New York City Opera

New york city opera was famously dubbed "the people's opera" by mayor fiorello laguardia at its founding in 1943. more than 80 years later, city opera continues its historic mission to inspire audiences with innovative and theatrically…

Arts & Culture
10
Bridgehampton Chamber Music Associates Inc

The general purpose of the organization is to promote chamber music concerts to the general public.

Arts & Culture
11
Transport Group Inc Dba Transport Group Theatre Company

Producing and developing plays and musicals.

Arts & Culture
12
American Chamber Ensemble Inc

The American Chamber Ensemble is a consortium of distinguished musicians whose concerts explore the music for piano with strings, woodwinds and/or voice, presenting both great standard repertoire and living American composers.

—
How this is measured
The grantee most central to the portfolio’s shape is Metropolitan Opera Association Inc; the most unlike its peers is Society for the Relief of Women and Children. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
03the grantee network

44 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. 44 of the 59 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)
8
Early backer (in before they grew)
44/44
Grantees still filing
25/44
Grew since first funded

Where the money sits, by cause and then by grantee

WNET: $199,782 · Arts & CultureWNETGUILD HALL OF EAST HAMPTON INC: $115,340 · Arts & CultureGUILD HALL OF EAST HAMPTON INCThe Metropolitan Opera Guild Inc: $92,250 · Arts & CultureThe Metropolitan Opera Guild IncYOUNG CONCERT ARTISTS INC: $50,000 · Arts & CultureYOUNG CONCERT ARTISTS INCNEW YORK CITY CENTER INC: $48,985 · Arts & CultureNEW YORK CITY CENTER INCMASTERVOICES INC: $44,275 · Arts & CultureMASTERVOICES INCMetropolitan Opera Association Inc: $40,000 · Arts & CultureMetropolitan Opera Association IncMETROPOLITAN MUSEUM OF ART: $25,000 · Arts & CultureAMERICAN MODERN OPERA COMPANY: $25,000 · Arts & Culture+10 more: $53,650 · Arts & Culture+10 morePianofest Inc: $50,000 · OtherPianofest IncNEW YORK FESTIVAL OF SONG (NYFOS): $25,000 · OtherNEW YORK FESTIVAL…The Stephen & Christine Schwarzman Animal Medical Center: $10,930 · OtherThe Stephen & Chr…Hands Inc: $10,000 · OtherHands IncBRIDGEHAMPTON CHAMBER MUSIC FESTIVAL (BCMF): $7,850 · OtherCONGREGATION EMANU-EL OF THE CITY OF NEW YORK: $6,990 · OtherThe 92nd Street: $6,200 · Other+18 more: $33,875 · Other+18 moreAMERICAN NURSES FOUNDATION INC: $20,000 · EducationLAGOND MUSIC SCHOOL INC: $15,000 · EducationPOTSDAM COLLEGE FOUNDATION INC: $10,000 · EducationICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $3,000 · EducationJUILLIARD SCHOOL: $2,700 · EducationEAST HAMPTON HEALTHCARE FOUNDATION: $20,000 · HealthFREEDOM INSTITUTE INC: $6,000 · HealthLUPUS RESEARCH ALLIANCE INC: $5,000 · HealthAMERICAN CANCER SOCIETY INC: $3,000 · HealthNEW YORK STEM CELL FOUNDATION INC: $1,500 · HealthTHE YOUNG MEN'S AND YOUNG WOMEN'S HEBREW ASSOCIATION: $20,000 · ReligionCITY PARKS FOUNDATION INC: $17,500 · Recreation & SportsTHE ANIMAL MEDICAL CENTER: $9,850 · AnimalsANIMAL RESCUE FUND OF THE HAMPTONS INC: $1,800 · AnimalsTHE LADIES VILLAGE IMPROVEMENT SOCIETY OF EAST HAMPTON: $1,000 · Community Improvement
Arts & Culture$694,282Other$150,845Education$50,700Health$35,500Religion$20,000Recreation & Sports$17,500Animals$11,650Community Improvement$1,000

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 budgetWNET: $199,782 over 2y, 0.1% of budgetGUILD HALL OF EAST HAMPTON INC: $115,340 over 2y, 2.0% of budgetThe Metropolitan Opera Guild Inc: $92,250 over 2y, 2.2% of budgetPianofest Inc: $50,000 over 2y, 6.4% of budgetYOUNG CONCERT ARTISTS INC: $50,000 over 1y, 0.9% of budgetNEW YORK CITY CENTER INC: $48,985 over 4y, 0.1% of budgetMASTERVOICES INC: $44,275 over 3y, 2.2% of budgetMetropolitan Opera Association Inc: $40,000 over 1y, 0.0% of budgetMETROPOLITAN MUSEUM OF ART: $25,000 over 1y, 0.0% of budgetAMERICAN MODERN OPERA COMPANY: $25,000 over 1y, 6.2% of budgetAMERICAN NURSES FOUNDATION INC: $20,000 over 3y, 0.2% of budgetEAST HAMPTON HEALTHCARE FOUNDATION: $20,000 over 2y, 0.7% of budgetTHE YOUNG MEN'S AND YOUNG WOMEN'S HEBREW ASSOCIATION: $20,000 over 1y, 0.0% of budgetCITY PARKS FOUNDATION INC: $17,500 over 4y, 0.0% of budgetLAGOND MUSIC SCHOOL INC: $15,000 over 2y, 1.3% of budgetTHE PERLMAN MUSIC PROGRAM INC: $13,000 over 3y, 0.1% of budgetMANHATTAN THEATRE CLUB INC: $13,000 over 2y, 0.0% of budgetPOTSDAM COLLEGE FOUNDATION INC: $10,000 over 1y, 0.2% of budgetTHE VIVIAN BEAUMONT THEATERINC D/B/A LINCOLN CENTER THEATER: $10,000 over 1y, 0.0% of budgetHands Inc: $10,000 over 2y, 0.4% of budgetTHE ANIMAL MEDICAL CENTER: $9,850 over 1y, 0.0% of budgetFREEDOM INSTITUTE INC: $6,000 over 2y, 0.2% of budget122 EAST 66TH STREET FOUNDATION INC: $5,000 over 2y, 1.4% of budgetLUPUS RESEARCH ALLIANCE INC: $5,000 over 2y, 0.0% of budgetSAG HARBOR SONG FESTIVAL INC: $5,000 over 1y, 2.6% of budgetST LUKES CHAMBER ENSEMBLE INC: $4,500 over 3y, 0.0% of budgetTHE NEW YORK FESTIVAL OF SONG INC: $4,500 over 2y, 0.7% of budgetICAHN SCHOOL OF MEDICINE AT MOUNT SINAI: $3,000 over 2y, 0.0% of budgetTHE MABEL MERCER FOUNDATION INC: $3,000 over 2y, 0.7% of budgetAMERICAN CANCER SOCIETY INC: $3,000 over 3y, 0.0% of budgetJUILLIARD SCHOOL: $2,700 over 1y, 0.0% of budgetTHE COSMOPOLITAN CLUB: $2,500 over 1y, 0.0% of budgetEAST HAMPTON LIBRARY: $2,400 over 1y, 0.1% of budgetEAST HAMPTON HISTORICAL SOCIETY INC: $1,900 over 2y, 0.1% of budgetANIMAL RESCUE FUND OF THE HAMPTONS INC: $1,800 over 1y, 0.0% of budgetNEW YORK STEM CELL FOUNDATION INC: $1,500 over 1y, 0.0% of budgetHOUSING AND NEIGHBORHOOD DEVELOPMENT SERVICES INC (HANDS INC): $1,000 over 1y, 0.1% of budgetGEORGE AND NORA LONDON FOUNDATION FOR SINGERS INC: $1,000 over 1y, 0.3% of budgetTHE LADIES VILLAGE IMPROVEMENT SOCIETY OF EAST HAMPTON: $1,000 over 1y, 0.1% of budgetTHE ACKERMAN FOUNDATION: $1,000 over 1y, 0.1% of budgetAMERICAN FRIENDS OF THE SALZBURG EASTER FESTIVAL: $750 over 1y, 8.3% of budgetSOCIETY FOR THE RELIEF OF WOMEN AND CHILDREN: $500 over 1y, 0.2% of budgetNew York Historical Society: $400 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.

J & Ar FoundationThe Howard and Sarah …The Robert and Joyce …The Hilaria and Alec …The New York Communit…Jewish Communal FundEvelyn B Olin Charita…Svetlana and Herbert …The Maryam and Hervey…Mary Jane Hipp Brock …The Jct FoundationPilzer Foundation Inc
J & Ar FoundationNY17.8× affinity6 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: J & Ar Foundation · The Howard and Sarah D Solomon Foundation · The Robert and Joyce Menschel Family Fdn · The Hilaria and Alec Baldwin Foundation Inc · The New York Community Trust · Jewish Communal Fund · Evelyn B Olin Charitable Tr · Svetlana and Herbert M Wachtell Foundation · The Maryam and Hervey Seley Foundation · Mary Jane Hipp Brock Family Foundation · The Jct Foundation · Pilzer 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.
04Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to The James S Marcus Foundation?

Find your warmest path to The James S Marcus 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 59 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.

Possibly out of date. A more recent filing (FY2026) is on record and reports $384k of grant expense with no grantee named in the published copy. A private foundation itemizes every grant it makes, so a return carrying none has filed its list as an attachment that the public copy does not include. The figures above are therefore from FY2025, the most recent year this funder’s grantee list reached the public record.

Source object · view filing

Play a game based on James S Marcus’ 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