· Private foundation
Joseph M Hamilburg 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 you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2020–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- Under $10k78 grants · $63k
- $10k–50k1 grant · $10k
| Recipient | Amount |
|---|---|
| NEW ENGLAND BAPTIST HOSPITAL | $10,000 |
| BOSTON BALLET | $7,600 |
| DANA-FARBER CANCER INSTITUTE | $5,000 |
| MASS GENERAL HOSPITAL | $5,000 |
| WILDLANDS TRUST | $5,000 |
| NEWTON-WELLESLEY HOSPITAL | $5,000 |
| BRIGHAM & WOMENS HOSPITAL | $5,000 |
| BIDMC (BETH ISRAEL DEACONESS MEDICAL CENTER) | $5,000 |
| TUFTS MEDICAL CENTER | $4,000 |
| NEW ENGLAND SKATING CLUB | $3,000 |
| MUSEUM OF FINE ARTS BOSTON | $3,000 |
| NOBLE & GREENOUGH SCHOOL | $2,000 |
| NATIONAL WILD TURKEY FEDERATION | $2,000 |
| NEW ENGLAND BAPTIST HOSPITAL | $1,500 |
| NOBLE & GREENOUGH SCHOOL | $1,000 |
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 (FY21–25, $200) land where the poverty rate runs at 8%, against an area that typically sits at 10%. 0% of those dollars go to grantees based in above-average-need neighborhoods. Your grants skew toward lower-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.
Which US states your grants reach
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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +45% since the first grant, against +15% for the ones you funded once.
91 repeat relationships — 62 still active in FY2025, 29 since wound down; 9 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, 93% of grant dollars renewed an existing relationship; $5k 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
BOSTON BALLET INC6× · 2020–2025 · $45k · revenue +19%- NENEW ENGLAND BAPTIST HOSPITAL6× · 2020–2025 · $38k · revenue +3%
Dana-Farber Cancer Institute Inc6× · 2020–2025 · $26k · revenue +73%
Funded once
- M4MASS 4-H FOUNDATIONone grant, 2021 · $5k
- TVTUFTS VETERINARY SCHOOLone grant, 2024 · $3k
- DYDORCHESTER YOUTH HOCKEY INCgraduatedone grant, 2021 · $1k · revenue +29%
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.
Provide an independent forum for those who dare to read, think, speak, and write to advance the professional, literary, and scientific understanding of sea power and other issues critical to global security.
The organization's mission is to conserve and promote new england's native plants to ensure healthy, biologically diverse landscapes.
Ci works to spotlight and secure the critical benefits that nature provides to humanity.
Rainforest trust saves endangered wildlife and protects our planet by creating rainforest reserves through partnerships, community engagement, and donor support.
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
To sustain, restore, and enhance the nation's fish, wildlife, plants, and habitats.
The wildlife society's mission is to inspire, empower, and enable wildlife professionals to sustain wildlife populations and habitats through science-based management and conservation.
To preserve the unique character and natural resources of harvard.
Advance science, engineering, and innovation throughout the world for the benefit of all. the world's largest multidisciplinary scientific society and a leading publisher of cutting-edge research through its science family of journals,…
The museum's mission statement is: "to discover, interpret, and disseminate - through scientific research and education - knowledge about human cultures, the natural world, and the universe."
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…
Eastern national promotes the public's understanding and support of america's national parks and other public trust partners by providing quality educational experiences, products and services.
For reference, the grantee most central to the portfolio’s shape is Wildlands Trust Inc and the most unlike its peers is Mansfield Police Association 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 43 years old; the field is 17. You back the established end — and your money leans older still.
The field is 20% startups (under 5 years old) — 3% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 4% lost their exemption, against 11% 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.
77 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. 77 of the 136 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 BOSTON BALLET INC ↗
- Who funds NEW ENGLAND BAPTIST HOSPITAL ↗
- Who funds Dana-Farber Cancer Institute Inc ↗
- Who funds WILDLANDS TRUST INC ↗
- Who funds Trustees of Tufts College ↗
- Who funds NOBLE AND GREENOUGH SCHOOL ↗
- Who funds NEW ENGLAND SKATING CLUB INC ↗
- Who funds THE NATURE CONSERVANCY ↗
- Who funds AMERICAN BOXER CHARITABLE FOUNDATION ↗
- Who funds WHEATON COLLEGE ↗
- Who funds WEST SIDE BENEVOLENT CIRCLE INC ↗
- Who funds JUDICIAL WATCH INC ↗
- Who funds DORCHESTER YOUTH HOCKEY INC ↗
- Who funds Walpole Little League Inc ↗
- Who funds RUFFED GROUSE SOCIETY ↗
- Who funds TROUT UNLIMITED INC ↗
- Who funds Atlantic Salmon Federation (US) Inc ↗
- Who funds SMITHSONIAN INSTITUTION ↗
- Who funds GREATER BOSTON FOOD BANK INC ↗
- Who funds The United States Holocaust Memorial Museum ↗
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: Combined Jewish Philanthropies of Greater Boston Inc · Analog Devices Foundation · Eastern Bank Foundation · The Pfizer Foundation Inc · National Philanthropic Trust · The Bank of America Charitable Foundation Inc · American Endowment Foundation · Vanguard Charitable Endowment Program · Morgan Stanley Global Impact Funding Trust Inc · Network for Good · Donor Advised Charitable Giving Inc · American Online Giving Foundation Inc
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 Joseph M Hamilburg Foundation 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.
- Vietnam Veterans Workshop Inc Dba New England Center and Home for Veterans — 66% of income from government
- Woods Hole Oceanographic Institution — 63% of income from government
- Greater Boston Food Bank Inc — 22% of income from government
- National Marine Life Center Inc — 16% of income from government
- Hospice of the Good Shepherd Inc — 13% of income from government
- Trustees of Tufts College — 13% of income from government
- Trustees of Boston University — 12% of income from government
- New England Aquarium Corporation — 12% of income from government
- Dana-Farber Cancer Institute Inc — 7% of income from government
- Wildlands Trust Inc — 5% of income from government
- Atlantic White Shark Conservancy Inc — 5% of income from government
- Special Olympics Massachusetts Inc — 1% of income from government
- New England Baptist Hospital — 1% of income from government
- Boston Ballet Inc — 0% of income from government
- Wheaton College — 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.