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Massachusetts · 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.

$73k
Granted FY2025(still arriving)
79
Grants FY2025
71
Organizations funded FY2024
18%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$100
Largest grant, FY2025
$10,000
Organizations funded a year
68 to 76
FY2020 to FY2024
States reached, FY2025
15
Total assets, FY2025
$1.1M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 18% of the organizations Joseph M Hamilburg Foundation funded were first-time grantees, receiving 14% of its grant dollars.

New vs renewed · share of each year

In FY2024, 86% of grant dollars renewed an existing relationship; $9k went to new ones.

50%100%’21’22’23’24
RenewedFirst-time

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

’21’22’23’24
EnvironmentAnimalsRecreation & SportsArts & CulturePhilanthropyCrime & LegalOther
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 arriving71$72k13%
FY202471$68k18%
FY202370$74k14%
FY202268$76k22%
FY202176$69k22%
FY202069$68kn/a
93% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2020 to 2025.

Health$229kArts & Culture$56kEducation$36kEnvironment$30kAnimals$27kReligion$10kRecreation & Sports$9kYouth Development$5kOther$0

Where its grants go

Grant dollars by states, across the years we hold.

Which US states its grants reach

ME
NH
MT
MN
MI
NY
MA
WY
PA
RI
CA
CO
NE
VA
MD
AZ
KS
TN
NC
SC
DC
GA
TX
FL

Top grantees

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

GranteeTotal grantedYearsShare of their budget
Boston Ballet Inc$45,26060%
New England Baptist Hospital$37,50060%
Dana-Farber Cancer Institute Inc$25,50060%
Mass General Brigham Incorporated$24,0006n/a
Wildlands Trust Inc$19,00050%
Trustees of Tufts College$16,00020%
Noble and Greenough School$13,00060%
Temple Shir Tikva$8,0002n/a
New England Skating Club Inc$6,00023%
National Wild Turkey Foundation Inc$5,6004n/a
Show all 78 grantees
All grantees of Joseph M Hamilburg Foundation by total granted
GranteeTotal grantedYearsShare of their budget
Boston Ballet Inc$45,26060%
New England Baptist Hospital$37,50060%
Dana-Farber Cancer Institute Inc$25,50060%
Mass General Brigham Incorporated$24,0006n/a
Wildlands Trust Inc$19,00050%
Trustees of Tufts College$16,00020%
Noble and Greenough School$13,00060%
Temple Shir Tikva$8,0002n/a
New England Skating Club Inc$6,00023%
National Wild Turkey Foundation Inc$5,6004n/a
American Boxer Charitable Foundation$2,50051%
Wheaton College$2,50060%
West Side Benevolent Circle Inc$1,50060%
Judicial Watch Inc$1,00060%
Walpole Little League Inc$1,00050%
Dorchester Youth Hockey Inc$1,00010%
Ruffed Grouse Society$90040%
Atlantic Salmon Federation (US) Inc$80060%
Trout Unlimited Inc$80060%
Smithsonian Institution$80060%
Greater Boston Food Bank Inc$80040%
The United States Holocaust Memorial Museum$70060%
American Rivers Inc$60060%
American Battlefield Trust$60060%
National Park Foundation$60060%
Ocean Conservancy$60060%
National Geographic Society$60060%
Simon Wiesenthal Center Inc$60060%
Yosemite Foundation$60060%
National Trust for Historic Preservation in the United States$60060%
Woods Hole Oceanographic Institution$60060%
The Heritage Foundation$60060%
National Marine Life Center Inc$60060%
Yellowstone Forever$50050%
National Wildlife Federation$50050%
The Claremont Institute for the Study of Statesmanship & Political Philosophy$50050%
National Parks Conservation Association$50050%
Rainforest Alliance Inc$50050%
Harvard-Radcliffe Gilbert & Sullivan Players$50013%
The Cousteau Society Inc$50050%
Cato Institute$50050%
Co2 Coalition$45030%
Special Olympics Massachusetts Inc$40040%
Project Veritas$40030%
Trustees of Boston University$40020%
Capital Research Center$40040%
USA Shooting Inc$40040%
Mansfield Police Association Foundation INC$3251n/a
Disabled Veterans National Foundation$30020%
Stephen Siller Tunnel to Towers Foundation$30030%
Friends of the Norfolk Public Library Inc$30030%
University of Minnesota Foundation$25010%
Pan-Massachusetts Challenge Inc$25010%
Save the Redwoods League$20020%
American Forests$20020%
The Trust for Public Land$20020%
National Review Institute$20020%
Brookline Community Mental Health Center Inc Dba the Brookline Center$20010%
Turning Point USA Inc$20020%
The Marine Mammal Center$20020%
World Wildlife Fund Inc$20020%
Atlantic White Shark Conservancy Inc$20020%
Ducks Unlimited Inc$20020%
American Farmland Trust$1001n/a
Swim Across America Inc$10010%
Vietnam Veterans Workshop Inc Dba New England Center and Home for Veterans$10010%
New England Aquarium Corporation$10010%
American Heart Association Inc$10010%
Americans For Battlefield Preservation$10010%
National Foundation for Gun Rights Inc$1001n/a
Wayland High School Scholarship Fund Committee$10010%
Hospice of the Good Shepherd Inc$10010%
Marine Corps Heritage Foundation$1001n/a
The Wilderness Society$10010%
Dana-Farber Inc$10010%
Turtle Island Corporation$10010%
Grand Canyon Conservancy$10010%
National Arbor Day Foundation$5010%

What it could do for these grantees

Plus 55 recipients with no EIN on record ($196k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Joseph M Hamilburg Foundation supplied at peak.

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetBoston Ballet Inc: $45,260 over 6y, 0.0% of budgetNew England Baptist Hospital: $37,500 over 6y, 0.0% of budgetDana-Farber Cancer Institute Inc: $25,500 over 6y, 0.0% of budgetWildlands Trust Inc: $19,000 over 5y, 0.2% of budgetTrustees of Tufts College: $16,000 over 2y, 0.0% of budgetNoble and Greenough School: $13,000 over 6y, 0.0% of budgetNew England Skating Club Inc: $6,000 over 2y, 2.6% of budgetAmerican Boxer Charitable Foundation: $2,500 over 5y, 0.5% of budgetWheaton College: $2,500 over 6y, 0.0% of budgetWest Side Benevolent Circle Inc: $1,500 over 6y, 0.1% of budgetJudicial Watch Inc: $1,000 over 6y, 0.0% of budgetWalpole Little League Inc: $1,000 over 5y, 0.2% of budgetDorchester Youth Hockey Inc: $1,000 over 1y, 0.3% of budgetRuffed Grouse Society: $900 over 4y, 0.0% of budgetAtlantic Salmon Federation (US) Inc: $800 over 6y, 0.0% of budgetTrout Unlimited Inc: $800 over 6y, 0.0% of budgetSmithsonian Institution: $800 over 6y, 0.0% of budgetGreater Boston Food Bank Inc: $800 over 4y, 0.0% of budgetThe United States Holocaust Memorial Museum: $700 over 6y, 0.0% of budgetAmerican Rivers Inc: $600 over 6y, 0.0% of budgetAmerican Battlefield Trust: $600 over 6y, 0.0% of budgetNational Park Foundation: $600 over 6y, 0.0% of budgetOcean Conservancy: $600 over 6y, 0.0% of budgetNational Geographic Society: $600 over 6y, 0.0% of budgetSimon Wiesenthal Center Inc: $600 over 6y, 0.0% of budgetYosemite Foundation: $600 over 6y, 0.0% of budgetNational Trust for Historic Preservation in the United States: $600 over 6y, 0.0% of budgetWoods Hole Oceanographic Institution: $600 over 6y, 0.0% of budgetThe Heritage Foundation: $600 over 6y, 0.0% of budgetNational Marine Life Center Inc: $600 over 6y, 0.0% of budgetYellowstone Forever: $500 over 5y, 0.0% of budgetNational Wildlife Federation: $500 over 5y, 0.0% of budgetThe Claremont Institute for the Study of Statesmanship & Political Philosophy: $500 over 5y, 0.0% of budgetNational Parks Conservation Association: $500 over 5y, 0.0% of budgetRainforest Alliance Inc: $500 over 5y, 0.0% of budgetHarvard-Radcliffe Gilbert & Sullivan Players: $500 over 1y, 2.9% of budgetThe Cousteau Society Inc: $500 over 5y, 0.0% of budgetCato Institute: $500 over 5y, 0.0% of budgetCo2 Coalition: $450 over 3y, 0.0% of budgetSpecial Olympics Massachusetts Inc: $400 over 4y, 0.0% of budgetProject Veritas: $400 over 3y, 0.0% of budgetTrustees of Boston University: $400 over 2y, 0.0% of budgetCapital Research Center: $400 over 4y, 0.0% of budgetUSA Shooting Inc: $400 over 4y, 0.0% of budgetDisabled Veterans National Foundation: $300 over 2y, 0.0% of budgetStephen Siller Tunnel to Towers Foundation: $300 over 3y, 0.0% of budgetFriends of the Norfolk Public Library Inc: $300 over 3y, 0.3% of budgetUniversity of Minnesota Foundation: $250 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 71.

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.

Combined Jewish Philanthropies of Greater Boston IncMA12.6× affinity4 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

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

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 Joseph M Hamilburg Foundation with peer funders

About Joseph M Hamilburg Foundation

How much does Joseph M Hamilburg Foundation give?
Joseph M Hamilburg Foundation reported 79 grants totaling $72,600 in its FY2025 IRS filing. It funded between 68 and 76 organizations a year over FY2020 to FY2024.
What does Joseph M Hamilburg Foundation fund?
By grant dollars over FY2020 to FY2025, its largest causes are Health (53%), Arts & Culture (13%), Education (8%).
Who are Joseph M Hamilburg Foundation's largest grantees?
By total granted over FY2020 to FY2025: Boston Ballet Inc ($45k), New England Baptist Hospital ($38k), Dana-Farber Cancer Institute Inc ($26k).
Does Joseph M Hamilburg Foundation fund new organizations?
In FY2024, 18% of the organizations it funded were first-time grantees.
Does Joseph M Hamilburg 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 Joseph M Hamilburg Foundation?
Its strongest co-funders, measured against what their size predicts, include Combined Jewish Philanthropies of Greater Boston Inc, Analog Devices Foundation, Eastern Bank Foundation.
Where is Joseph M Hamilburg Foundation based?
Joseph M Hamilburg Foundation is based in MA.

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 136 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.

Source object · view filing

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