· Private foundation
James M Rabb & Melinda a Rabb Charitable Trust
Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.
What you funded, over time
By grantee IRS cause code (NTEE).
A cause breakdown isn’t shown here: 60% of JAMES M RABB & MELINDA A RABB CHARITABLE TRUST’s grantee dollars fall outside its nine largest cause areas, whether because the recipient carries no IRS cause code or because its cause sits in the long tail. A chart would be mostly one residual band and misrepresent the portfolio.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k28 grants · $27k
- $10k–50k7 grants · $180k
| Recipient | Amount |
|---|---|
| COMBINED JEWISH PHILANTHROPIES | $45,000 |
| JEWISH FAMILY & CHILDREN'S SERVICE | $40,250 |
| HARVARD GLEE CLUB FOUNDATION | $30,000 |
| TRUSTEES OF TUFTS COLLEGE | $25,000 |
| HARVARD MEDICAL SCHOOL | $15,000 |
| HARVARD ART MUSEUM | $15,000 |
| Individual grant recipient | $10,000 |
| ANTIDEFIMATION LEAGUE | $5,000 |
| MUSEUM OF FINE ARTS | $4,500 |
| Individual grant recipient | $2,500 |
| HARVARD HILLEL | $2,000 |
| ISABELLA STEWART GARDNER MUSEUM | $2,000 |
| PAN MASS CHALLENGE | $2,000 |
| CONGREGATION SHIRAT HAYAM | $1,600 |
| Individual grant recipient | $1,100 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Your human-services grants (FY22–24, $200) land where the poverty rate runs at 16%, against an area that typically sits at 8%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
28 repeat relationships — 24 still active in FY2024, 4 since wound down; 9 grantees were first funded in FY2024 (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 FY2024, 85% of grant dollars renewed an existing relationship; $24k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). 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
- JFJEWISH FAMILY & CHILDREN'S SERVICE INC4× · 2021–2024 · $126k · revenue +14%
Trustees of Tufts College2× · 2021–2024 · $45k · revenue +17%
MUSEUM OF FINE ARTS4× · 2021–2024 · $18k · revenue +36%
Funded once
- TFTUFTS FRIEDMAN SCHOOLone grant, 2022 · $20k
BOSTON LYRIC OPERA COMPANYgraduatedone grant, 2022 · $3k · revenue +127%- BSBOSTON SYMPHONY ORCHESTRA INCgraduatedone grant, 2023 · $2k · revenue +26%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
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.
Mission strengthened by more than a century and a half of dedication to academic excellence, boston college commits itself to the highest standards of teaching and research in undergraduate, graduate and professional programs and to the…
The University of New Haven is a student-centered comprehensive university with an emphasis on excellence in liberal arts and professional education. Our mission is to prepare our students to lead purposeful and fulfilling lives in a…
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…
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…
Dartmouth College educates the most promising students and prepares them for a lifetime of learning and of responsible leadership, through a faculty dedicated to teaching and the creation of knowledge.
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…
The organization's primary exempt purpose is to provide access to and conduct activities in furtherance of higher education.
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…
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)
To facilitate harvard university's scientific, literary, and educational activities in washington, dc.
For reference, the grantee most central to the portfolio’s shape is Jewish Family & Children's Service Inc and the most unlike its peers is The Oley Foundation Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 61 years old; the field is 17. You back the established end — and your money leans older still.
The field is 19% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 10% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
26 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 26 of the 52 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds Combined Jewish Philanthropies of Greater Boston Inc ↗
- Who funds HARVARD GLEE GLUB ALUMNI INC ↗
- Who funds JEWISH FAMILY & CHILDREN'S SERVICE INC ↗
- Who funds President and Fellows of Harvard College ↗
- Who funds Trustees of Tufts College ↗
- Who funds MUSEUM OF FINE ARTS ↗
- Who funds HILLEL FOUNDATION OF CAMBRIDGE INC ↗
- Who funds ANTI-DEFAMATION LEAGUE ↗
- Who funds PAN-MASSACHUSETTS CHALLENGE INC ↗
- Who funds BOSTON LYRIC OPERA COMPANY ↗
- Who funds ISABELLA STEWART GARDNER MUSEUM INC ↗
- Who funds BOSTON SYMPHONY ORCHESTRA INC ↗
- Who funds THE JEWISH WOMEN'S ARCHIVE INC ↗
- Who funds TRUSTEES OF BOSTON UNIVERSITY ↗
- Who funds JEWISH ARTS COLLABORATIVE INC ↗
- Who funds BRANDEIS UNIVERSITY ↗
- Who funds NEW ENGLAND CONSERVATORY OF MUSIC ↗
- Who funds NANTUCKET HISTORICAL ASSOCIATION ↗
- Who funds WESTON FOREST AND TRAIL ASSOCIATION INC ↗
- Who funds FRIENDS OF THE WESTON PUBLIC LIBRARY INC ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
Open a dossier: James & Melinda Rabb Family Foundation · Combined Jewish Philanthropies of Greater Boston Inc · National Philanthropic Trust · American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund · Donor Advised Charitable Giving Inc · Amazonsmile Foundation
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization James M Rabb & Melinda a Rabb Charitable Trust funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal, a single department, or state — and drag the year to watch it move.
- Trustees of Tufts College — 13% of income from government
- Trustees of Boston University — 12% of income from government
- Pine Street Inn Inc — 11% of income from government
- Brandeis University — 9% of income from government
- President and Fellows of Harvard College — 7% of income from government
- Boston Lyric Opera Company — 3% of income from government
- Jewish Family & Children's Service Inc — 1% of income from government
- New England Conservatory of Music — 1% of income from government
- Nantucket Historical Association — 1% of income from government
- Boston Symphony Orchestra Inc — 0% of income from government
- Museum of Fine Arts — 0% of income from government
- Rosie's Place Inc — 0% of income from government
- Pan-Massachusetts Challenge Inc — 0% of income from government
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 your grant caused the public funding. Coverage is precision-first — a floor, not 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 12–24 months.
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How do I get to James M Rabb & Melinda a Rabb Charitable Trust?
Find your warmest path to James M Rabb & Melinda a Rabb Charitable Trust 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.