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The Summerhill Foundation at a glance

· Private foundation

The Summerhill 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.

$123k
Granted FY2025still arriving
1
Grants FY2025still arriving
1
States reached
$123k
Largest
01What it fundsRead
02Its granteesRead
03Its fieldRead
01What it funds
0186% classified

What it funded, over time

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

Arts & Culture$66kEducation$40kHealth$27kPhilanthropy$22kCivil Rights$8kHuman Services$4kEnvironment$2kRecreation & Sports$2kOther$0
02FY2025 · 1 grant

Where the money goes

Grants by size, and the largest recipients.

$123,350
Median grant
1
States reached
$1.6M
Total assets
Largest grants
RecipientAmount
VARIOUS CONTRIBUTIONS FROM YEAR END REPORT$123,350
02Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

82%of every dollar goes to organizations it has funded before.
$399k · 27 repeat orgs$89k to everyone else

Grantees it renews have grown median revenue +21% since the first grant, against +7% for those funded once.

27 repeat relationships: 1 still active in FY2025, 26 since wound down.

How the two cohorts compare

Re-uppedFunded once

Organizations

27
28

Total granted

$399k
$89k

Median revenue growth · since first grant

+21%
+7%

Still filing today

56%
11%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

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

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

’19’21’22’23’24’25
EducationArts & CultureRecreation & SportsPhilanthropyCivil RightsHuman ServicesOther
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

  • MO
    Museum of Modern Art
    2× · 2021–2022 · $5k · revenue +44%
  • SM
    Stamford Museum & Nature Center Inc
    2× · 2021–2022 · $4k · revenue +87%
  • TO
    TRUSTEES OF DEERFIELD ACADEMY
    2× · 2021–2022 · $3k · revenue +6%

Funded once

  • SM
    Stamford Museum & Nature Center
    one grant, 2019 · $51k
  • UW
    United Way of Western CT
    one grant, 2019 · $5k
  • NC
    Norwalk Community College
    one grant, 2019 · $3k
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.

03Its 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
American Museum of Natural History

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."

Arts & Culture
2
The Pierpont Morgan Library

The Morgan Library & Museum celebrates and shares the history and process of human creativity from antiquity to the present day through the preservation, study, and interpretation of a dynamic and growing collection.

Education
3
The Frick Collection

The Frick Collection (the "Collection") operates an internationally recognized art museum and library program for the inspiration and enjoyment of the public and for the advancement of the study of fine arts and kindred subjects.

—
4
The Brooklyn Institute of Arts and Sciences

The mission of the brooklyn institute of arts and sciences, d/b/a brooklyn museum (the "museum") is to bring people together through art and experiences that inspire celebration, compassion, courage, and the will to act. (see schedule o).

Arts & Culture
5
University of New Haven

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…

Education
6
Fairfield University

To establish, organize, maintain and conduct an institution for secondary, undergraduate and graduate education in the state of connecticut, and to perform such other works of education, charity and religion. see schedule o.

Education
7
The Jewish Museum

The mission of the jewish museum is to collect, preserve, exhibit and interpret art and jewish culture. see schedule o for more information.

Arts & Culture
8
Connecticut Aeronautical Historical Association Inc

The new england air museum's mission is to preserve and present the story of aviation and aerospace, with an emphasis on new england's role, and the genius and inspiration that made it possible. the museum also seeks to inspire young…

Arts & Culture
9
Trustees of Dartmouth College

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.

Education
10
Wnet

Wnet is a multi-media public service non-profit that delivers lifelong learning and meaningful experiences to our communities. our content inspires curiosity, encourages action and nurtures dreams.

Arts & Culture
11
Florence Griswold Museum Inc

The florence griswold museum seeks to promote a greater understanding of connecticut's contribution to american art and history through public exhibitions and educational programs.

Arts & Culture
12
Dutchess Land Conservancy Inc

Dutchess land conservancy (dlc) is dedicated to preserving the scenic, agricultural and environmental resources of dutchess county, new york, and the surrounding area. dlc, as a private non-profit land conservation organization, carries…

Environment
How this is measured
The grantee most central to the portfolio’s shape is The New Canaan Country School Incorporated; the most unlike its peers is Metropolitan Museum of Art. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
03the 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 56 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)
2
Early backer (in before they grew)
19/19
Grantees still filing
13/19
Grew since first funded

Where the money sits, by cause and then by grantee

VARIOUS CONTRIBUTIONS FROM YEAR END REPORT: $303,800 · OtherVARIOUS CONTRIBUTIONS FROM YEAR END REPORTStamford Museum & Nature Center: $51,000 · OtherStamford Museum & Nature CenterStamford Hospital Foundation: $20,000 · OtherHarvard College Fund: $15,000 · Other+37 more: $58,000 · Other+37 moreUNITED WAY OF COASTAL AND WESTERN CONNECTICUT INC: $10,000 · PhilanthropyFAIRFIELD COUNTY'S COMMUNITY FOUNDATION INC: $3,250 · PhilanthropyMuseum of Modern Art: $5,000 · Arts & CultureStamford Museum & Nature Center Inc: $3,500 · Arts & CultureMETROPOLITAN MUSEUM OF ART: $2,000 · Arts & CultureNEW YORK PUBLIC RADIO: $500 · Arts & CultureGARRISON FOREST SCHOOL INC: $3,000 · EducationTRUSTEES OF DEERFIELD ACADEMY: $3,000 · EducationTHE NEW CANAAN COUNTRY SCHOOL INCORPORATED: $2,000 · EducationTHE FERGUSON LIBRARY: $1,000 · EducationThe New York Public Library Astor Lenox and Tilden Foundations: $500 · EducationTHE CENTER FOR REPRODUCTIVE RIGHTS INC: $5,000 · Civil RightsHOLE IN THE WALL GANG FUND INC: $2,000 · Recreation & SportsHORIZONS INC: $1,500 · Recreation & SportsTHE FOOD BANK OF LOWER FAIRFIELD COUNTY INC: $1,000 · Food & Nutrition
Other$447,800Philanthropy$13,250Arts & Culture$11,000Education$9,500Civil Rights$5,000Recreation & Sports$3,500Food & Nutrition$1,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetUNITED WAY OF COASTAL AND WESTERN CONNECTICUT INC: $10,000 over 2y, 0.1% of budgetMuseum of Modern Art: $5,000 over 2y, 0.0% of budgetTHE CENTER FOR REPRODUCTIVE RIGHTS INC: $5,000 over 2y, 0.0% of budgetStamford Museum & Nature Center Inc: $3,500 over 2y, 0.1% of budgetFAIRFIELD COUNTY'S COMMUNITY FOUNDATION INC: $3,250 over 2y, 0.0% of budgetGARRISON FOREST SCHOOL INC: $3,000 over 2y, 0.0% of budgetTRUSTEES OF DEERFIELD ACADEMY: $3,000 over 2y, 0.0% of budgetMETROPOLITAN MUSEUM OF ART: $2,000 over 2y, 0.0% of budgetHOLE IN THE WALL GANG FUND INC: $2,000 over 2y, 0.0% of budgetTHE NEW CANAAN COUNTRY SCHOOL INCORPORATED: $2,000 over 2y, 0.0% of budgetFAMILY CENTERS INC: $2,000 over 2y, 0.0% of budgetHORIZONS INC: $1,500 over 1y, 0.1% of budgetTHE FERGUSON LIBRARY: $1,000 over 2y, 0.0% of budgetTHE FOOD BANK OF LOWER FAIRFIELD COUNTY INC: $1,000 over 1y, 0.0% of budgetTHE TRANSPORTATION ASSOCIATION OF GREENWICH: $1,000 over 2y, 0.1% of budgetADVANCED MEDICAL RESEARCH FOUNDATION INCD/B/A NILE ALBRIGHT RESEARCH FDN: $1,000 over 1y, 0.0% of budgetNEW YORK PUBLIC RADIO: $500 over 2y, 0.0% of budgetSTAMFORD LAND CONSERVATION TRUST INC: $500 over 2y, 0.1% of budgetThe New York Public Library Astor Lenox and Tilden Foundations: $500 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 UNITED WAY OF COASTAL AND WESTERN CONNECTICUT INC ↗
  • Who funds Museum of Modern Art ↗
  • Who funds THE CENTER FOR REPRODUCTIVE RIGHTS INC ↗
  • Who funds Stamford Museum & Nature Center Inc ↗
  • Who funds FAIRFIELD COUNTY'S COMMUNITY FOUNDATION INC ↗
  • Who funds GARRISON FOREST SCHOOL INC ↗
  • Who funds TRUSTEES OF DEERFIELD ACADEMY ↗
  • Who funds METROPOLITAN MUSEUM OF ART ↗
  • Who funds HOLE IN THE WALL GANG FUND INC ↗
  • Who funds THE NEW CANAAN COUNTRY SCHOOL INCORPORATED ↗
  • Who funds FAMILY CENTERS INC ↗
  • Who funds HORIZONS INC ↗
  • Who funds THE FERGUSON LIBRARY ↗

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.

Fairfield County's Co…Ge Aerospace Foundati…Jpmorgan Chase Founda…National Philanthropi…The Bank of America C…Vanguard Charitable E…American Online Givin…Fidelity Investments …Amazonsmile Foundation
Fairfield County's Community Foundation IncCT13.4× affinity4 shared granteesties to 8 of 8Hover any node to trace its alignments.Compare side by side →

Open a dossier: Fairfield County's Community Foundation Inc · Ge Aerospace Foundation · Jpmorgan Chase Foundation · National Philanthropic Trust · The Bank of America Charitable Foundation Inc · Vanguard Charitable Endowment Program · 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.

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 56 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

Play a game based on Summerhill’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home