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New York · 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 FY2025(still arriving)
12
Grants FY2025
27
Organizations funded FY2024
37%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$10,000
Largest grant, FY2025
$100,000
Organizations funded a year
21 to 33
FY2020 to FY2024
States reached, FY2025
5
Total assets, FY2025
$2.5M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 37% of the organizations The James S Marcus Foundation funded were first-time grantees, receiving 67% of its grant dollars.

New vs renewed · share of each year

In FY2024, 33% of grant dollars renewed an existing relationship; $123k went to new ones.

50%100%’23’24
RenewedFirst-time

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

’23’24
Arts & CultureEducationHealthAnimalsOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2025still arriving12$283k17%
FY202427$183k37%
FY202321$172k67%
FY202033$344kn/a
92% 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

Top grantees

Largest recipients by total granted, FY2020 to FY2025, and the share of each one’s budget the grants supplied at peak.

Show all 46 grantees
All grantees of The James S Marcus Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Wnet$199,78220%
Guild Hall of East Hampton Inc$115,34022%
The Metropolitan Opera Guild Inc$92,25022%
Pianofest Inc$50,00026%
Young Concert Artists Inc$50,00011%
New York City Center Inc$48,98540%
Mastervoices Inc$44,27532%
Metropolitan Opera Association Inc$40,00010%
Metropolitan Museum of Art$25,00010%
American Modern Opera Company$25,00016%
American Nurses Foundation Inc$20,00030%
East Hampton Healthcare Foundation$20,00021%
The Young Men's and Young Women's Hebrew Association$20,00010%
City Parks Foundation Inc$17,50040%
Lagond Music School Inc$15,00021%
The Perlman Music Program Inc$13,00030%
Manhattan Theatre Club Inc$13,00020%
Potsdam College Foundation Inc$10,00010%
The Vivian Beaumont Theaterinc D/B/A Lincoln Center Theater$10,00010%
Hands Inc$10,00020%
The Animal Medical Center$9,85010%
Congregation Emanu-El of the City of New York$6,9902n/a
Freedom Institute Inc$6,00020%
122 East 66th Street Foundation Inc$5,00021%
Lupus Research Alliance Inc$5,00020%
Sag Harbor Song Festival Inc$5,00013%
St Lukes Chamber Ensemble Inc$4,50030%
The New York Festival of Song Inc$4,50021%
Icahn School of Medicine at Mount Sinai$3,00020%
The Mabel Mercer Foundation Inc$3,00021%
American Cancer Society Inc$3,00030%
Juilliard School$2,70010%
The Cosmopolitan Club$2,50010%
East Hampton Library$2,40010%
East Hampton Historical Society Inc$1,90020%
Animal Rescue Fund of the Hamptons Inc$1,80010%
New York STEM Cell Foundation Inc$1,50010%
Jonah Foundation$1,2501n/a
Housing and Neighborhood Development Services Inc (Hands Inc)$1,00010%
George and Nora London Foundation for Singers Inc$1,00010%
The Ladies Village Improvement Society of East Hampton$1,00010%
The Ackerman Foundation$1,00010%
Richard Tucker Music Foundation Inc$1,0001n/a
American Friends of the Salzburg Easter Festival$75018%
Society for the Relief of Women and Children$50010%
New York Historical Society$40010%

What it could do for these grantees

Plus 13 recipients with no EIN on record ($66k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget The James S Marcus Foundation supplied at peak.

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

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 43.

Nonprofits that may fit its grantmaking

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 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.

Compare The James S Marcus Foundation with peer funders

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.

About The James S Marcus Foundation

How much does The James S Marcus Foundation give?
The James S Marcus Foundation reported 12 grants totaling $284,550 in its FY2025 IRS filing. It funded between 21 and 33 organizations a year over FY2020 to FY2024.
What does The James S Marcus Foundation fund?
By grant dollars over FY2020 to FY2025, its largest causes are Arts & Culture (31%), Health (2%), Education (1%).
Who are The James S Marcus Foundation's largest grantees?
By total granted over FY2020 to FY2025: Wnet ($200k), Guild Hall of East Hampton Inc ($115k), The Metropolitan Opera Guild Inc ($92k).
Does The James S Marcus Foundation fund new organizations?
In FY2024, 37% of the organizations it funded were first-time grantees.
Does The James S Marcus Foundation accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as The James S Marcus Foundation?
Its strongest co-funders, measured against what their size predicts, include J & Ar Foundation, The Howard and Sarah D Solomon Foundation, The Robert and Joyce Menschel Family Fdn.
Where is The James S Marcus Foundation based?
The James S Marcus Foundation is based in NY.

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

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