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· Private foundation

The Stephen Muss Foundation Inc

Its FY2025 filing reports that it accepted unsolicited grant applications.

$1.0M
Granted FY2023
3
Grants FY2023
1
States reached
$1.0M
Largest
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 2023.

Health$3.1MPhilanthropy$2.3MReligion$1.3MEducation$1.0MInternational$475kArts & Culture$300kYouth Development$70kRecreation & Sports$50kOther$0
02FY2023 · 3 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2023

  • $10k–50k2 grants · $25k
  • $250k+1 grant · $1.0M
$15,000
Median grant
1
States reached
$2k
Total assets
Largest grants
RecipientAmount
ALEXANDER MUSS HIGH SCHOOL IN ISREA$1,000,000
MOUNT SINAI MEDICAL CENTER FOUNDATI$15,000
LATIN SONGWRITERS HALL OF FAME$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 (FY18–18, $25k) land where the poverty rate runs at 16%, against an area that typically sits at 11%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 11%MASSACHUSETS WONDERFUND INC: $25k → 16%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.

60%of every dollar goes to organizations it has funded before.
$3.7M · 11 repeat orgs$2.4M to everyone else

11 repeat relationships: 2 still active in FY2023, 9 since wound down; 1 grantees were first funded in FY2023 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

11
12

Total granted

$3.7M
$1.4M

Median revenue growth · since first grant

0%
+39%

Still filing today

45%
25%

New vs renewed · share of each year

In FY2023, 2% of grant dollars renewed an existing relationship; $1.0M went to new ones.

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

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

’17’18’19’20’21’22’23
InternationalEducationHuman ServicesYouth DevelopmentHealthOther
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

  • MS
    MOUNT SINAI MEDICAL CENTER
    2× · 2017–2020 · $2.0M
  • BW
    BRIGHAM & WOMANS HOSPITAL
    2× · 2017–2022 · $1.0M
  • CO
    CHABAD OF THE BERKSHIRES
    2× · 2018–2020 · $265k

Funded once

  • IG
    Individual grant recipient
    one grant, 2017 · $1.0M
  • IG
    Individual grant recipient
    one grant, 2018 · $200k
  • FO
    FRIENDS OF ISRAEL SCOUTS INCgraduated
    one grant, 2017 · $50k · revenue +70%
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
Rabbi Isaac Elchanan Theological Seminary

To prepare students for the rabbinate and to issue the traditional certificate of ordination in connection therewith. the seminary is authorized to confer the degree of master of hebrew literature (m.h.l.), doctor of hebrew literature…

Education
2
Yeshiva University

The university is composed of several colleges and schools providing undergraduate, graduate, professional and post-doctoral education and training and research and clinical programs.

Education
3
Miami Music Project Inc

Miami music project uses music as an instrument for social transformation, empowering children to acquire values and achieve their full potential, positively affecting their society through the study and performance of music. our vision is…

Arts & Culture
4
Fuchs Mizrachi Schools

The mission of fuchs mizrachi school is to educate each child in the orthodox jewish religious zionist tradition, imbued with the love of g-d, torah, people and the land of israel.

—
5
Shalom School

Shalom school's mission is to provide each child with an outstanding education in a nurturing environment that is academically excellent, inclusive, innovative, and inspired by jewish values and traditions.

—
6
Sherit Isroel
—
7
Greater Miami Hillel Foundation Inc

The mission of the organization is to enrich the lives of jewish undergraduate and graduate students so that they may enrich the jewish people and the world.

—
8
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
9
Mesorah Heritage Foundation

The foundation's mission is to research, locate, translate, and create jewish religious, literary, biblical, and talmudic works for religious, scholarly and cultural purposes for the general public.

Arts & Culture
10
San Francisco Jazz Organization

The san francisco jazz organization (the organization) is a recognized international leader in jazz creation, presentation, and education. the organization explores the full spectrum of jazz, from the music's origins in the african…

Arts & Culture
11
The Young Men's and Young Women's Hebrew Association

For over 150 years, the 92nd street y, new york has been serving its communities and the larger world by bringing people together (continued on schedule o)and providing exceptional, groundbreaking programs in the performing and visual…

Religion
12
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
How this is measured
The grantee most central to the portfolio’s shape is Miami Symphony Orchestra Inc; the most unlike its peers is Latin Songwriters Hall of Fame Inc. 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

11 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. 11 of the 26 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.

1
Load-bearing (≥25% of a budget)
0
Early backer (in before they grew)
11/11
Grantees still filing
6/11
Grew since first funded

Where the money sits, by cause and then by grantee

MOUNT SINAI MEDICAL CENTER: $2,015,000 · OtherMOUNT SINAI MEDICAL CENTERBRIGHAM & WOMANS HOSPITAL: $1,041,332 · OtherBRIGHAM & WOMANS HOSPITALIndividual grant recipient: $1,000,000 · OtherIndividual grant recipientCHABAD OF THE BERKSHIRES: $265,000 · OtherCHABAD OF THE BERKSHIRESIndividual grant recipient: $200,000 · OtherLATIN SONGWRITERS HALL OF FAME INC: $165,000 · Other+11 more: $210,000 · OtherGREATER MIAMI JEWISH FEDERATION INC: $2,250,000 · PhilanthropyGREATER MIAMI JEWISH FEDERATI…ALEXANDER MUSS INSTITUTE FOR ISRAEL EDUCATION INC: $1,000,000 · InternationalALEXANDER MUSS INST…JEWISH NATIONAL FUND (KEREN KAYEMETH LEISRAEL) INC: $450,000 · InternationalJEWISH NATIONAL FUN…+2 more: $75,000 · InternationalNEW WORLD SYMPHONY INC: $50,000 · EducationMASSACHUSETTS WONDERFUND INC: $25,000 · Human ServicesSPIRITUALITY FOR KIDS INTERNATIONAL INC: $20,000 · Youth DevelopmentMOUNT SINAI MEDICAL CENTER FOUNDATION: $20,000 · Health
Other$4,896,332Philanthropy$2,250,000International$1,525,000Education$50,000Human Services$25,000Youth Development$20,000Health$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 budgetGREATER MIAMI JEWISH FEDERATION INC: $2,250,000 over 2y, 2.9% of budgetALEXANDER MUSS INSTITUTE FOR ISRAEL EDUCATION INC: $1,000,000 over 1y, 4.6% of budgetJEWISH NATIONAL FUND (KEREN KAYEMETH LEISRAEL) INC: $450,000 over 1y, 0.5% of budgetLATIN SONGWRITERS HALL OF FAME INC: $165,000 over 7y, 46% of budgetFRIENDS OF ISRAEL SCOUTS INC: $50,000 over 1y, 0.7% of budgetNEW WORLD SYMPHONY INC: $50,000 over 2y, 0.1% of budgetMASSACHUSETTS WONDERFUND INC: $25,000 over 1y, 0.5% of budgetHELPS INTERNATIONAL: $25,000 over 1y, 0.4% of budgetSPIRITUALITY FOR KIDS INTERNATIONAL INC: $20,000 over 2y, 5.0% of budgetMOUNT SINAI MEDICAL CENTER FOUNDATION: $20,000 over 2y, 0.0% of budgetMIAMI SYMPHONY ORCHESTRA INC: $15,000 over 2y, 0.7% 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 GREATER MIAMI JEWISH FEDERATION INC ↗
  • Who funds ALEXANDER MUSS INSTITUTE FOR ISRAEL EDUCATION INC ↗
  • Who funds JEWISH NATIONAL FUND (KEREN KAYEMETH LEISRAEL) INC ↗
  • Who funds LATIN SONGWRITERS HALL OF FAME INC ↗
  • Who funds FRIENDS OF ISRAEL SCOUTS INC ↗
  • Who funds NEW WORLD SYMPHONY INC ↗
  • Who funds MASSACHUSETTS WONDERFUND INC ↗
  • Who funds HELPS INTERNATIONAL ↗
  • Who funds SPIRITUALITY FOR KIDS INTERNATIONAL INC ↗
  • Who funds MOUNT SINAI MEDICAL CENTER FOUNDATION ↗
  • Who funds MIAMI SYMPHONY ORCHESTRA 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.

Donor Advised Charitable Giving IncCO5.4× affinity4 shared granteesties to 2 of 2Hover any node to trace its alignments.Compare side by side →

Open a dossier: Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation

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 The Stephen Muss Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from The Stephen Muss Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 30%3%13%28%50%funder's share of their income ↑0%1%3%4%5%share of the org’s income from government →median 0%
  • New World Symphony Inc: 0% of income from government
no gov moneyreceives it· size = income
3get no government money at all
2report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–5%
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 The Stephen Muss Foundation Inc?

Find your warmest path to The Stephen Muss 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 26 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 2023, released 2023. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Possibly out of date. A more recent filing (FY2025) is on record but names no grant recipient in the published copy, so the figures above are from FY2023, the most recent year this funder’s grantee list reached the public record.

Source object · view filing

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