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· Private foundation

The Sternbergh Foundation Ltd

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.

$45k
Granted FY2025still arriving
7
Grants FY2025still arriving
2
States reached
$32k
Largest
01What it funds
0195% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Health$359kHuman Services$16kPhilanthropy$12kEducation$8kArts & Culture$4kYouth Development$3kRecreation & Sports$2kEnvironment$484Other$0
02FY2025 · 7 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k5 grants · $3k
  • $10k–50k2 grants · $42k
$1,000
Median grant
2
States reached
$23k
Total assets
Largest grants
RecipientAmount
NANTUCKET COTTAGE HOSPITAL$31,500
CLEVELAND CLINIC MARTIN HEALTH$10,000
SAILFISH POINT FDN$2,000
UNITED WAY OF MARTIN COUNTY$1,000
SWIM ACROSS AMERICA$200
NANTUCKET HISTORICAL ASSOC$150
TOM NEVERS CIVIC ASSOCIATION$50
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 (FY17–21, $2k) land where the poverty rate runs at 10%, against an area that typically sits at 12%. 6% of those dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 12%WOUNDED WARRIOR PROJECT: $150 → 14%HIBISCUS CHILDREN'S CENTER FOUNDATION: $100 → 10%THE COMMUNITY FOUNDATION MARTIN - ST LUCIE: $1k → 10%THE COMMUNITY FOUNDATION MARTIN - ST LUCIE: $1k → 10%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.

Which US states its grants reach

NY
MA
OH
PA
NJ
CT
CA
VA
AZ
TX
FL
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.

99%of every dollar goes to organizations it has funded before.
$401k · 21 repeat orgs$3k to everyone else

21 repeat relationships: 6 still active in FY2025, 15 since wound down; 1 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

21
15

Total granted

$401k
$3k

Median revenue growth · since first grant

+43%
+75%

Still filing today

52%
47%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $50 went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

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

’17’18’19’20’21’22’23’24’25
EducationArts & CulturePhilanthropyHuman 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

  • SP
    SAILFISH POINT FDN
    9× · 2017–2025 · $16k · revenue +60%
  • CR
    CANCER RESEARCH INSTITUTE
    8× · 2017–2024 · $4k · revenue +43%
  • GC
    GREENWICH COUNTRY DAY SCHOOL
    6× · 2017–2022 · $3k · revenue +182%

Funded once

  • BA
    BOYS AND GIRLS CLUBS OF MARTIN COUNTYgraduated
    one grant, 2018 · $500 · revenue +511%
  • FO
    FLORIDA OCEANOGRAPHIC SOCIETY
    one grant, 2019 · $484 · revenue +12%
  • MM
    MARIA MITCHELL ASSOCIATIONgraduated
    one grant, 2019 · $250 · revenue +229%
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
Nantucket Conservation Foundation Inc

The nantucket conservation foundation owns, protects, and stewards over 9,000 acres of land and coastal shoreline, conserves nantucket's rare and significant natural resources, and engages in impactful ecological research to inform…

Environment
2
Nantucket Community Sailing Inc

To engage people of all ages in the joy of sailing, offering access to all nantucket's youth, and teaching every participant in our programs enduring life and leadership skills, with a deep respect for the marine environment.

Recreation & Sports
3
Nantucket Yacht Club

To provide means for the recreation and entertainment of its members, by establishing and maintaining a club with the proper buildings, grounds, and facilities to promote yachting, sports and social activities.

—
4
Nantucket Atheneum Inc

The nantucket atheneum, a private non-profit organization provides public library service to the island's year-round and seasonal residents, housed in a historic 1847 building and the weezie library for children. the atheneum collects,…

—
5
Norwalk Seaport Association Inc

The norwalk seaport association, inc. offers a cultural, environmental, and historical journey to the norwalk islands. the sheffield island lighthouse and the light keeper's cottage provide a unique historical and educational venue which…

Arts & Culture
6
United States Naval Institute

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.

—
7
Nantucket Community Music Center

To enrich the cultural life of the island by fostering and supporting music education and performance opportunities for young people and adults.

Arts & Culture
8
Rhode Island Marine Trade Association

Rimta's mission is to champion the rhode island marine industry through advocacy, education, environmental stewardship, innovation and promotion.

—
9
Nantucket Arts Council Inc

Support and encourage a collaborative community of the visual, performing and literary arts through education, grants, scholarships and events.

Arts & Culture
10
Saint Anselm College

Saint anselm is a catholic, benedictine college providing all of its students a distinctive liberal arts education that incorporates opportunities for professional and career preparation. it does so in a learning community that encourages…

Education
11
The Nantucket Education Trust Inc

To generate private support for public education on nantucket, to foster private and public partnerships that benefit the children of nantucket public schools, and to honor excellence in teaching and learning.

—
12
New England Aquarium Corporation

The new england aquarium is a catalyst for global change through public engagement and education, commitment to marine animal conservation, innovative scientific research, and effective advocacy for a vital and vibrant ocean.

Animals
How this is measured
The grantee most central to the portfolio’s shape is The Community Foundation - Martin / St Lucie Inc; the most unlike its peers is Pomona College. 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

19 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. 19 of the 38 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.

0
Load-bearing (≥25% of a budget)
6
Early backer (in before they grew)
19/19
Grantees still filing
16/19
Grew since first funded

Where the money sits, by cause and then by grantee

NANTUCKET COTTAGE HOSPITAL: $259,000 · OtherNANTUCKET COTTAGE HOSPITALCLEVELAND CLINIC MARTIN HEALTH: $60,000 · OtherCLEVELAND CLINIC MARTIN HEALTHMARTIN HEALTH FOUNDATION: $34,500 · OtherMARTIN HEALTH FOUNDATION+20 more: $11,314 · OtherSAILFISH POINT FDN: $16,000 · EducationGREENWICH COUNTRY DAY SCHOOL: $3,000 · Education+2 more: $225 · EducationUNITED WAY OF MARTIN COUNTY: $9,000 · PhilanthropySWIM ACROSS AMERICA: $650 · PhilanthropyCANCER RESEARCH INSTITUTE: $4,400 · HealthARTISTS ASSOCIATION OF NANTUCKET: $1,750 · Arts & CultureNANTUCKET HISTORICAL ASSOC: $1,175 · Arts & CultureNANTUCKET DREAMLAND FOUNDATION: $500 · Arts & CulturePROJECT LIFT: $2,000 · Youth DevelopmentBOYS AND GIRLS CLUBS OF MARTIN COUNTY: $500 · Youth DevelopmentTHE COMMUNITY FOUNDATION MARTIN - ST LUCIE: $2,200 · Human ServicesWOUNDED WARRIOR PROJECT: $150 · Human ServicesHIBISCUS CHILDREN'S CENTER FOUNDATION: $100 · Human Services
Other$364,814Education$19,225Philanthropy$9,650Health$4,400Arts & Culture$3,425Youth Development$2,500Human Services$2,450

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 budgetSAILFISH POINT FDN: $16,000 over 9y, 1.0% of budgetUNITED WAY OF MARTIN COUNTY: $9,000 over 8y, 0.1% of budgetCANCER RESEARCH INSTITUTE: $4,400 over 8y, 0.0% of budgetGREENWICH COUNTRY DAY SCHOOL: $3,000 over 6y, 0.0% of budgetTHE COMMUNITY FOUNDATION MARTIN - ST LUCIE: $2,200 over 2y, 0.0% of budgetPROJECT LIFT: $2,000 over 3y, 0.1% of budgetARTISTS ASSOCIATION OF NANTUCKET: $1,750 over 4y, 0.0% of budgetNANTUCKET HISTORICAL ASSOC: $1,175 over 9y, 0.0% of budgetSWIM ACROSS AMERICA: $650 over 3y, 0.0% of budgetNANTUCKET DREAMLAND FOUNDATION: $500 over 2y, 0.0% of budgetBOYS AND GIRLS CLUBS OF MARTIN COUNTY: $500 over 1y, 0.0% of budgetFLORIDA OCEANOGRAPHIC SOCIETY: $484 over 1y, 0.0% of budgetMARIA MITCHELL ASSOCIATION: $250 over 1y, 0.0% of budgetTABLE TO TABLE: $150 over 1y, 0.0% of budgetWOUNDED WARRIOR PROJECT: $150 over 1y, 0.0% of budgetHIBISCUS CHILDREN'S CENTER FOUNDATION: $100 over 1y, 0.0% of budgetPOMONA COLLEGE: $75 over 2y, 0.0% 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 SAILFISH POINT FDN ↗
  • Who funds UNITED WAY OF MARTIN COUNTY ↗
  • Who funds CANCER RESEARCH INSTITUTE ↗
  • Who funds GREENWICH COUNTRY DAY SCHOOL ↗
  • Who funds THE COMMUNITY FOUNDATION MARTIN - ST LUCIE ↗
  • Who funds PROJECT LIFT ↗
  • Who funds ARTISTS ASSOCIATION OF NANTUCKET ↗
  • Who funds NANTUCKET HISTORICAL ASSOC ↗
  • Who funds SWIM ACROSS AMERICA ↗
  • Who funds NANTUCKET DREAMLAND FOUNDATION ↗
  • Who funds BOYS AND GIRLS CLUBS OF MARTIN COUNTY ↗
  • Who funds FLORIDA OCEANOGRAPHIC SOCIETY ↗
  • Who funds MARIA MITCHELL ASSOCIATION ↗
  • Who funds NANTUCKET POLICE CHARITABLE ASSOCIATION ↗
  • Who funds TABLE TO TABLE ↗
  • Who funds WOUNDED WARRIOR PROJECT ↗
  • Who funds SADONA PUBLIC LIBRARY ↗
  • Who funds HIBISCUS CHILDREN'S CENTER FOUNDATION ↗
  • Who funds POMONA COLLEGE ↗

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.

Vanguard Charitable Endowment ProgramPA8.3× affinity5 shared granteesties to 4 of 4Hover any node to trace its alignments.Compare side by side →

Open a dossier: Vanguard Charitable Endowment Program · Donor Advised Charitable Giving Inc · American Online Giving Foundation 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 Sternbergh Foundation Ltd funds: left to right is the share of its income from government, bottom to top the share from The Sternbergh Foundation Ltd. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 50%0%1%3%5%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 2%
  • Nantucket Maria Mitchell Association in: 9% of income from government
  • Nantucket Dreamland Foundation Inc: 4% of income from government
  • United Way of Martin County Inc: 4% of income from government
  • Boys & Girls Club of Martin County: 2% of income from government
  • Nantucket Historical Association: 1% of income from government
  • Florida Oceanographic Society Inc: 0% of income from government
  • Artists Association of Nantucket Inc: 0% of income from government
  • Wounded Warrior Project Inc: 0% of income from government
no gov moneyreceives it· size = income
5get no government money at all
3report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
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.

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 38 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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