· Private foundation
Siff Charitable 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.
What it funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.
Where the money goes
Grants by size, and the largest recipients.
By grant size · FY2025
- Under $10k29 grants · $34k
- $10k–50k4 grants · $69k
| Recipient | Amount |
|---|---|
| UMASS CHAN MEDICAL SCHOOL FOUNDATION | $26,600 |
| WOODSTOCK FILM FESTIVAL | $15,000 |
| NEW YORK UNIVERSITY | $15,000 |
| NEXT FOR AUTISM | $12,000 |
| ALPINE LEARNING CENTER | $5,000 |
| UMASS MEMORIAL FOUNDATION | $5,000 |
| TEMPLE EMANUEL SINAI | $3,400 |
| TIBETAN HOME OF HOPE | $2,500 |
| WORCESTER ART MUSEUM | $2,500 |
| AUTISM PROJECT OF PALM BEACH COUNTY | $2,500 |
| EN GUARDE ARTS | $2,200 |
| WATCH RESOURCES INC | $2,000 |
| JEWISH HEALTH CARE CENTER | $1,600 |
| BREAST CANCER RESEARCH FOUNDATION | $1,500 |
| ECOTARIUM | $1,000 |
Does the money reach high-need areas?
Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.
Its human-services grants (FY17–25, $35k) land where the poverty rate runs at 11%, against an area that typically sits at 8%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.
How this is measured
Which US states its grants reach
How this is measured
Who it funds again
Organizations funded in more than one year, against those funded once.
Grantees it renews have grown median revenue +40% since the first grant, against +14% for those funded once.
54 repeat relationships: 21 still active in FY2025, 33 since wound down; 11 grantees were first funded in FY2025 (too recent to call).
How the two cohorts compare
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2025, 79% of grant dollars renewed an existing relationship; $22k went to new ones.
Where new relationships form · theme of each grantee’s first grant
How this is measured
Backed again, and grew
- NYNew York University6× · 2020–2025 · $70k · revenue +45%
- APAUTISM PROJECT OF PALM BEACH COUNTY INC9× · 2017–2025 · $23k · revenue +306%
- HIHerizon Inc7× · 2017–2023 · $19k · revenue +29%
Funded once
- FFFoundation for Neurologic Diseases Incone grant, 2021 · $10k · revenue -39%
- IGIndividual grant recipientone grant, 2024 · $10k
- CACHILDREN'S AID FOUNDATION OF CANADAone grant, 2022 · $5k
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.
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.
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.
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
Wpi transforms lives, turns knowledge into action to confront global challenges, and revolutionizes stem through distinctive and inclusive education, projects and research. (http://www.wpi.edu/about/mission.html)
Wentworth institute of technology is a nationally recognized private coeducational and residential university of higher education with a mission to empower, inspire and innovate through experiential learning with a core purpose of career…
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…
Organization's mission: boston university is an international, comprehensive, private research university, committed to educating students to be reflective, resourceful individuals ready to live, adapt, and lead in an interconnected world.…
Wheaton college provides a transformative liberal arts education, combining theory and practice, for intellectually curious students within a collaborative and vibrant extended community and network that values and strives to create an…
Whitehead institute forges new frontiers in science, uncovering insights today that unlock the potential of tomorrow. our advances in genetics and genomics are now enabling us to tackle the complexities of life with unprecedented depth and…
Operate a state-of-the-art, world-class genomic research center that creates and uses advanced genomics to understand the genetic basis of disease. for more information, see schedule o.
The mission of the institute is to translate basic genetic and molecular mechanisms of schizophrenia and related developmental brain disorders into clinical advances that change the lives of affected individuals. it is catalyzing a new…
Western new england university, a comprehensive private institution with a tradition of excellence in teaching and scholarship and a commitment to service, awards undergraduate, master's, and doctoral degrees in various departments from…
The Marine Biological Laboratory (MBL) is a world-renowned center for biological discovery and training that is notably affiliated with more than 60 Nobel Prize winners. Research is conducted by full-time faculty as well as hundreds of the…
How this is measured
61 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. 61 of the 117 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.
Where the money sits, by cause and then by grantee
Each grantee by its size and the funder’s share of it; top left is load-bearing
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 JEWISH FEDERATION OF CENTRAL MASSACHUSETTS INC ↗
- Who funds New York University ↗
- Who funds NEXT FOR AUTISM INC ↗
- Who funds AUTISM PROJECT OF PALM BEACH COUNTY INC ↗
- Who funds Herizon Inc ↗
- Who funds Dana-Farber Cancer Institute Inc ↗
- Who funds WOODSTOCK FILM FESTIVAL INC ↗
- Who funds WORCESTER ART MUSEUM ↗
- Who funds Foundation for Neurologic Diseases Inc ↗
- Who funds JEWISH HEALTHCARE CENTER INC ↗
- Who funds THE BREAST CANCER RESEARCH FOUNDATION INC ↗
- Who funds MORSELIFE FOUNDATION INC ↗
- Who funds WORLD AGAINST TOYS CAUSING HARM INC ↗
- Who funds WORCESTER NATURAL HISTORY SOCIETY INC ↗
- Who funds TRUSTEES OF CLARK UNIVERSITY ↗
- Who funds BROWN UNIVERSITY ↗
- Who funds NAMI PALM BEACH COUNTY INC ↗
- Who funds GULFSHORE PLAYHOUSE INC ↗
- Who funds NATIONAL JEWISH HEALTH ↗
- Who funds BRANDEIS UNIVERSITY ↗
- Who funds THE FILMMAKERS COLLABORATIVE INC ↗
- Who funds EN GARDE ARTS INC ↗
- Who funds ALZHEIMER'S DRUG DISCOVERY FOUNDATION ↗
- Who funds WILLIAM JAMES COLLEGE INC ↗
- Who funds AUTISM SPEAKS INC ↗
- Who funds CENTER FOR SAFETY & CHANGE 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.
Open a dossier: Melvin S Cutler Charitable Foundation · Ruth H & Warren a Ellsworth Foundation · Schwartz Charitable Foundation · Greater Worcester Community Foundation Inc · Community Foundation for Palm Beach and Martin Counties Inc · Combined Jewish Philanthropies of Greater Boston Inc · Joseph Persky Foundation · The Siff Exkorn Family Foundation Stable Rock Services LLC · Mildred H McEvoy Foundation · The Fred Harris Daniels Foundation · The Fletcher Foundation · Stoddard Charitable Trust
How this is measured
How much its grantees rely on government
Each dot is one organization Siff Charitable Foundation funds: left to right is the share of its income from government, bottom to top the share from Siff Charitable Foundation. Bigger dots raise more.
- Greater Lowell Community Foundation Inc: 18% of income from government
- Jewish Healthcare Center Inc: 15% of income from government
- William James College Inc: 11% of income from government
- Gulf Stream Council of Boy Scouts of America Inc: 9% of income from government
- Brandeis University: 9% of income from government
- Worcester Natural History Society Inc: 8% of income from government
- Music Worcester Inc: 7% of income from government
- Dana-Farber Cancer Institute Inc: 7% of income from government
- Worcester Chamber Music Society Inc: 5% of income from government
- Worcester Historical Museum: 5% of income from government
- Worcester State Foundation Inc: 3% of income from government
- Trustees of Clark University: 2% of income from government
- Special Olympics Massachusetts Inc: 1% of income from government
- Worcester Art Museum: 1% of income from government
- The Filmmakers Collaborative Inc: 1% of income from government
- Jacob's Pillow Dance Festival Inc: 1% of income from government
- Goucher College: 0% of income from government
- Gulfshore Playhouse Inc: 0% of income from government
- Pan-Massachusetts Challenge Inc: 0% of income from government
- TrustBridge Inc: 0% of income from government
- South Florida Pbs Inc: 0% of income from government
How this is measured
Warm introductions · Powered by PlinthPlus
How do I get to Siff Charitable Foundation?
Find your warmest path to Siff Charitable 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.
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