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The Stewart & Constance Greenfield Foundation at a glance

· Private foundation

The Stewart & Constance Greenfield 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.

$1.1M
Granted FY2024still arriving
1
Grants FY2024still arriving
1
States reached
$1.1M
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
0196% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Environment$1.5MEducation$1.5MHealth$123kScience & Tech$78kArts & Culture$55kFood & Nutrition$54kAnimals$44kInternational$44kOther$0
02FY2024 · 1 grant

Where the money goes

Grants by size, and the largest recipients.

$1,100,000
Median grant
1
States reached
$193k
Total assets
Largest grants
RecipientAmount
ST JOHN'S COLLEGE$1,100,000
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 (FY17–22, $4k) land where the poverty rate runs at 13%, against an area that typically sits at 9%. 81% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 9%POSITIVE DIRECTIONS: $3k → 16%CHARITY NAVIGATOR: $100 → 7%CHARITY NAVIGATOR: $100 → 7%CHARITY NAVIGATOR: $100 → 7%FIDELCO GUIDE DOG FOUNDATION INC: $250 → 11%FIDELCO GUIDE DOG FOUNDATION INC: $250 → 11%FIDELCO GUIDE DOG FOUNDATION INC: $250 → 11%FIDELCO GUIDE DOG FOUNDATION INC: $250 → 11%BUILDERS BEYOND BORDERS: $500 → 9%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

VT
MT
IL
WI
NY
MA
NJ
CT
CA
VA
MD
NM
KS
TN
DC
GA
TX
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.

42%of every dollar goes to organizations it has funded before.
$949k · 94 repeat orgs$1.3M to everyone else

94 repeat relationships: 0 still active in FY2024, 94 since wound down; 1 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

94
42

Total granted

$949k
$192k

Median revenue growth · since first grant

+36%
+55%

Still filing today

62%
52%

New vs renewed · share of each year

In FY2024, 0% of grant dollars renewed an existing relationship; $1.1M went to new ones.

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

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

’17’18’19’20’21’22’24
Arts & CultureEnvironmentHealthEducationInternationalHuman 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

  • THE TRUSTEES OF MOUNT HOLYOKE COLLEGE
    6× · 2017–2022 · $60k · revenue +21%
  • SANTA FE INSTITUTE
    6× · 2017–2022 · $60k · revenue +219%
  • BH
    BRIDGEPORT HOSPITAL FOUNDATION INC
    6× · 2017–2022 · $50k · revenue +66%

Funded once

  • TN
    THE NATURE CONSERVANCY OF CT
    one grant, 2017 · $50k
  • YU
    YALE UNIVERSITY
    one grant, 2017 · $40k
  • IG
    Individual grant recipient
    one grant, 2022 · $20k
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
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
2
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.

—
3
Native Plant Trust Inc

The organization's mission is to conserve and promote new england's native plants to ensure healthy, biologically diverse landscapes.

Environment
4
Rainforest Trust

Rainforest trust saves endangered wildlife and protects our planet by creating rainforest reserves through partnerships, community engagement, and donor support.

International
5
World Wildlife Fund Inc

Wwf's mission is to conserve nature and reduce the most pressing threats to the diversity of life on earth. (continued on schedule o)

Environment
6
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
7
The Trustees of Princeton University

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…

Education
8
American Association for the Advancement of Science

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,…

Science & Tech
9
Massachusetts Institute of Technology

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.

Education
10
Northeast College of Health Sciences

Northeast college of health sciences (the college) is committed to academic excellence, leadership, and professional best practices in the health sciences.

Education
11
Manhattanville University

To educate students to be ethical and socially responsible leaders in a global community.

Education
12
American Gas Association

American gas association's (the association) mission is to develop and advocate for informed, innovative, and durable policy that fulfills our nation's energy needs, environmental aspirations and economic potential. we are committed to…

—
How this is measured
The grantee most central to the portfolio’s shape is Congregation Organized for a New Ct; the most unlike its peers is Thoreau Farm Trust Inc. 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

84 grantees tracked through their own filings, 2017–2026.

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 2026, not grant rows in a single year, so this will not match the grant count on the cover. 84 of the 140 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)
13
Early backer (in before they grew)
84/84
Grantees still filing
65/84
Grew since first funded

Where the money sits, by cause and then by grantee

THE NATURE CONSERVANCY: $1,125,000 · OtherTHE NATURE CONSERVANCYNATURE CONSERVANCY IN CT: $125,000 · OtherNATURE CONSERVANCY IN CTYALE UNIVERSITY: $80,000 · Other+80 more: $387,100 · Other+80 moreST JOHN'S COLLEGE: $1,100,000 · EducationST JOHN'S COLLEGEYale University: $90,000 · EducationYale UniversityTHE TRUSTEES OF MOUNT HOLYOKE COLLEGE: $60,000 · Education+8 more: $93,750 · Education+8 moreWHOLESOME WAVE INC: $35,000 · EnvironmentSAVE THE SOUND: $35,000 · EnvironmentENVIRONMENTAL DEFENSE FUND INCORPORATED: $27,500 · EnvironmentNATIONAL AUDUBON SOCIETY INC: $25,000 · EnvironmentNATURAL RESOURCES DEFENSE COUNCIL INC: $25,000 · EnvironmentCONNECTICUT AUDUBON SOCIETY INC: $15,000 · EnvironmentEARTHPLACE INC: $15,000 · EnvironmentSHELBURNE FARMS: $10,000 · EnvironmentASPETUCK LAND TRUST: $8,500 · Environment+4 more: $4,250 · EnvironmentBRIDGEPORT HOSPITAL FOUNDATION INC: $50,000 · HealthCHILD MIND INSTITUTE INC: $14,000 · HealthTHE MOUNT SINAI MEDICAL CENTER: $7,500 · HealthPULMONARY FIBROSIS FOUNDATION: $6,000 · HealthPLANNED PARENTHOOD OF SOUTHERN NEW ENGLAND INC: $5,000 · Health+5 more: $8,250 · HealthSANTA FE INSTITUTE: $60,000 · Science & TechMEDECINS SANS FRONTIERES USA INC: $27,500 · InternationalAfrican Mission Healthcare Foundation: $5,000 · InternationalTECHNOSERVE INC: $3,000 · InternationalHABITAT FOR HUMANITY INTERNATIONAL INC: $3,000 · InternationalTHE CARTER CENTER INC: $2,000 · International+3 more: $1,750 · InternationalTHE THOREAU SOCIETY INC: $4,600 · Arts & CulturePLAYWRIGHTS HORIZONS INC: $4,000 · Arts & CultureNEW HAVEN INTERNATIONAL FESTIVAL OF ARTS AND IDEAS INC: $3,100 · Arts & CultureAmerican Museum of Natural History: $2,750 · Arts & CultureMETROPOLITAN MUSEUM OF ART: $2,500 · Arts & CultureWESTPORT COUNTRY PLAYHOUSE INC: $2,350 · Arts & CultureWESTPORT COMMUNITY THEATRE INC: $1,600 · Arts & CultureSMITHSONIAN INSTITUTION: $1,000 · Arts & Culture+6 more: $2,500 · Arts & Culture
Other$1,717,100Education$1,343,750Environment$200,250Health$90,750Science & Tech$60,000International$42,250Arts & Culture$24,400

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

25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetTHE NATURE CONSERVANCY: $1,125,000 over 4y, 0.1% of budgetST JOHN'S COLLEGE: $1,100,000 over 1y, 0.8% of budgetYale University: $90,000 over 2y, 0.0% of budgetTHE TRUSTEES OF MOUNT HOLYOKE COLLEGE: $60,000 over 6y, 0.0% of budgetSANTA FE INSTITUTE: $60,000 over 6y, 0.1% of budgetBRIDGEPORT HOSPITAL FOUNDATION INC: $50,000 over 6y, 0.1% of budgetWHOLESOME WAVE INC: $35,000 over 5y, 0.3% of budgetSAVE THE SOUND: $35,000 over 3y, 0.2% of budgetCT LEAGUE OF CONSERVATION VOTERS EDUCATION FUND: $32,000 over 6y, 3.5% of budgetMEDECINS SANS FRONTIERES USA INC: $27,500 over 6y, 0.0% of budgetENVIRONMENTAL DEFENSE FUND INCORPORATED: $27,500 over 6y, 0.0% of budgetNATIONAL AUDUBON SOCIETY INC: $25,000 over 6y, 0.0% of budgetNATURAL RESOURCES DEFENSE COUNCIL INC: $25,000 over 5y, 0.0% of budgetTHE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK: $22,500 over 2y, 0.0% of budgetFEDERATION FOR JEWISH PHILANTHROPY OF UPPER FAIRFIELD COUNTY: $17,500 over 3y, 0.7% of budgetCONGREGATION ORGANIZED FOR A NEW CT: $15,000 over 3y, 1.5% of budgetCONNECTICUT AUDUBON SOCIETY INC: $15,000 over 5y, 0.1% of budgetEARTHPLACE INC: $15,000 over 6y, 0.1% of budgetCHILD MIND INSTITUTE INC: $14,000 over 6y, 0.0% of budgetTeach for America Inc: $12,500 over 6y, 0.0% of budgetACHIEVEMENT FIRST INC: $10,000 over 6y, 0.0% of budgetASPETUCK LAND TRUST: $8,500 over 6y, 0.1% of budgetTHE MOUNT SINAI MEDICAL CENTER: $7,500 over 6y, 0.6% of budgetWILLIAM J BRENNAN CENTER FOR JUSTICE INC: $7,000 over 6y, 0.0% of budgetPULMONARY FIBROSIS FOUNDATION: $6,000 over 6y, 0.0% of budgetCONNECTICUT FOODSHARE INC: $6,000 over 4y, 0.0% of budgetKIPP FOUNDATION: $6,000 over 3y, 0.0% of budgetConnecticut Farmland Trust Inc: $5,500 over 6y, 0.4% of budgetPLANNED PARENTHOOD OF SOUTHERN NEW ENGLAND INC: $5,000 over 6y, 0.0% of budgetTHE AMERICAN SOCIETY FOR THE PROTECTION OF NATURE IN ISRAEL INC: $5,000 over 5y, 0.1% of budgetSoundview Empowerment Alliance Inc: $5,000 over 1y, 0.4% of budgetAfrican Mission Healthcare Foundation: $5,000 over 1y, 0.1% of budgetUKRAINE AID INTERNATIONAL INC: $5,000 over 1y, 1.3% of budgetROBIN HOOD FOUNDATION: $5,000 over 2y, 0.0% of budgetTHE THOREAU SOCIETY INC: $4,600 over 5y, 0.4% of budgetWILDEARTH GUARDIANS: $4,250 over 6y, 0.1% of budgetPLAYWRIGHTS HORIZONS INC: $4,000 over 4y, 0.0% of budgetWildlife Conservation Society: $4,000 over 6y, 0.0% of budgetNEW HAVEN INTERNATIONAL FESTIVAL OF ARTS AND IDEAS INC: $3,100 over 6y, 0.0% of budgetTECHNOSERVE INC: $3,000 over 3y, 0.0% of budgetJEWISH HOME FOR THE ELDERLY OF FAIRFIELD COUNTY INC: $3,000 over 6y, 0.0% of budgetHABITAT FOR HUMANITY INTERNATIONAL INC: $3,000 over 3y, 0.0% of budgetAmerican Museum of Natural History: $2,750 over 5y, 0.0% of budgetHEALTHCORPS INC: $2,500 over 1y, 0.1% of budgetTouchstones Discussion Project Inc: $2,500 over 3y, 0.2% of budgetUNITED WAY OF COASTAL FAIRFIELD COUNTY INC: $2,500 over 4y, 0.0% of budgetMETROPOLITAN MUSEUM OF ART: $2,500 over 1y, 0.0% of budgetFRESH AIR FUND: $2,500 over 3y, 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 THE NATURE CONSERVANCY ↗
  • Who funds ST JOHN'S COLLEGE ↗
  • Who funds Yale University ↗
  • Who funds THE TRUSTEES OF MOUNT HOLYOKE COLLEGE ↗
  • Who funds SANTA FE INSTITUTE ↗
  • Who funds BRIDGEPORT HOSPITAL FOUNDATION INC ↗
  • Who funds WHOLESOME WAVE INC ↗
  • Who funds SAVE THE SOUND ↗
  • Who funds CT LEAGUE OF CONSERVATION VOTERS EDUCATION FUND ↗
  • Who funds MEDECINS SANS FRONTIERES USA INC ↗
  • Who funds ENVIRONMENTAL DEFENSE FUND INCORPORATED ↗
  • Who funds NATIONAL AUDUBON SOCIETY INC ↗
  • Who funds NATURAL RESOURCES DEFENSE COUNCIL INC ↗
  • Who funds THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK ↗
  • Who funds FEDERATION FOR JEWISH PHILANTHROPY OF UPPER FAIRFIELD COUNTY ↗
  • Who funds CONGREGATION ORGANIZED FOR A NEW CT ↗
  • Who funds CONNECTICUT AUDUBON SOCIETY INC ↗
  • Who funds EARTHPLACE INC ↗
  • Who funds CHILD MIND INSTITUTE INC ↗
  • Who funds Teach for America Inc ↗
  • Who funds ACHIEVEMENT FIRST INC ↗
  • Who funds SHELBURNE FARMS ↗
  • Who funds ASPETUCK LAND TRUST ↗
  • Who funds THE MOUNT SINAI MEDICAL CENTER ↗
  • Who funds WILLIAM J BRENNAN CENTER FOR JUSTICE INC ↗
  • Who funds PULMONARY FIBROSIS FOUNDATION ↗

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…Connecticut Humanitie…Newman's Own Foundati…Howard & Katherine Ai…Ibm International Fou…The Carl Marks Founda…Smilow FoundationThe James & Mary Elle…FjcJewish Communal FundThe Lundberg Family F…The Bessemer Giving F…
Fairfield County's Community Foundation IncCT34.2× affinity15 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Fairfield County's Community Foundation Inc · Connecticut Humanities Council Inc · Newman's Own Foundation · Howard & Katherine Aibel Foundation · Ibm International Foundation · The Carl Marks Foundation Inc · Smilow Foundation · The James & Mary Ellen Marpe Family Foundation · Fjc · Jewish Communal Fund · The Lundberg Family Foundation · The Bessemer Giving Fund

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 Stewart & Constance Greenfield Foundation funds: left to right is the share of its income from government, bottom to top the share from The Stewart & Constance Greenfield Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 140%0%1%3%5%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 3%
  • Pacific House Inc: 46% of income from government
  • Save the Sound: 37% of income from government
  • Aspetuck Land Trust: 28% of income from government
  • Yale University: 12% of income from government
  • Westport Community Theatre Inc: 10% of income from government
  • Planned Parenthood of Southern New England Inc: 10% of income from government
  • Connecticut Farmland Trust Inc: 7% of income from government
  • Connecticut Foodshare Inc: 5% of income from government
  • Neighborhood Studios of Fairfield County Inc: 3% of income from government
  • Shelburne Farms: 3% of income from government
  • Westport Country Playhouse Inc: 2% of income from government
  • St John's College: 2% of income from government
  • New Haven International Festival of Arts and Ideas Inc: 1% of income from government
  • The Trustees of Mount Holyoke College: 1% of income from government
  • Westport Historical Society Inc: 1% of income from government
  • Connecticut Audubon Society Inc: 1% of income from government
  • Jewish Home for the Elderly of Fairfield County Inc: 0% of income from government
  • Pequot Library Association: 0% of income from government
  • Achievement First Inc: 0% of income from government
no gov moneyreceives it· size = income
14get no government money at all
11report 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 140 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Possibly out of date. A more recent filing (FY2025) is on record and reports no grant expense, so the figures above are from FY2024, the most recent year this funder made grants.

Source object · view filing

Play a game based on Stewart & Constance Greenfield’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