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Data / Nonprofits / Connecticut / Greenwich / Philanthropy, voluntarism and grantmaking foundations

Philanthropy, voluntarism and grantmaking foundations nonprofits in Greenwich, CT: 132 registered with the IRS

132 philanthropy, voluntarism and grantmaking foundations nonprofits are registered with the IRS in Greenwich, CT, 132 of them 501(c)(3) charities; the 7 that report revenue took in $9 million. The largest by revenue: Lyford Cay Foundation Inc ($7 million), Mill Reef Fund ($951,422), Impact 100 Fairfield County ($493,474).

SpecStream is the live web data engine for teams and agents. It reads the IRS register of exempt organizations as the IRS updates it, and this page is that reading. Ask for the nonprofits you need by place, cause and size, with their latest Form 990 figures and websites, and they arrive in your sheet, CRM, Slack or agent.

Get philanthropy, voluntarism and grantmaking foundations nonprofits in Greenwich

Every organization, largest by revenue first

OrganizationTypeSinceRevenueAssetsFiling
Lyford Cay Foundation Inc501(c)(3)1969$7 million$39.6 million2024-12
Mill Reef Fund501(c)(3)1950$951,422$1.1 million2025-12
Impact 100 Fairfield County501(c)(3)2015$493,474$558,6202025-06
Garrett B Smith Foundation501(c)(3)1995$212,351$1.7 million2025-12
Greenwich Department of Human Services Fund Inc501(c)(3)2018$195,328$395,7802025-06
Greenwich Catholic Education Trust Fund501(c)(3)1971$145,017$4.1 million2026-06
Williams Syndrome Charitable Foundation USA Inc501(c)(3)2017$9,049$4,7012024-12
A & C de Coster Foundation501(c)(3)2021$9.8 million2026-01
Aaron and Betty Lee Stern Foundation501(c)(3)2010$3.4 million2025-12
Alec and Tamar Ellison Family Foundation501(c)(3)2001$411,1872025-12
Alfa Foundation501(c)(3)2001$24.1 million2025-12
Allwin Family Foundation501(c)(3)1997$1,8772025-12
Anantaa-Om Foundation501(c)(3)2015$28.1 million2024-12
Anikstein Family Fund Inc501(c)(3)2017$2.4 million2024-12
Anne Li McGraw and Charles Robert McGraw Family Foundation Inc501(c)(3)2019$12025-12
Aphrodite & Peter Skeadas Charitable Foundation Inc501(c)(3)2024
Arora Foundation Inc501(c)(3)2007$3.2 million2025-12
Ask Family Foundation501(c)(3)2001$55,9322025-12
August Family Foundation Trust501(c)(3)2022$2,0272024-12
Azcat Foundation501(c)(3)2017$66.2 million2025-12
Barbara and Gary Brandt Family Foundation501(c)(3)2008$2.8 million2024-12
Bemc Foundation501(c)(3)2021$33.4 million2024-12
Berkley Foundation for Historical Books and Documents501(c)(3)2024$100 million2024-12
Bimah Foundation501(c)(3)2012$14.5 million2024-12
Black IV Inc501(c)(3)2019$1.2 million2025-12
Bondi Foundation Inc501(c)(3)1999$7 million2025-12
Brille Family Foundation501(c)(3)2005$83,6912025-12
Brookfield Burke Foundation Inc501(c)(3)1998$205,5492025-12
Brucato Family Foundation Inc501(c)(3)2021$7,2822025-12
Bruised Camel Charitable Foundation501(c)(3)2013$813,6682024-12
Bursky Family Foundation501(c)(3)2025$25.3 million2024-12
Cameron Family Foundation Inc501(c)(3)2008$564,2272025-09
Caplan Fam Foundation Trust Agreement 102700501(c)(3)2001$478,9682024-12
Center for Contemporary Domentation Inc501(c)(3)2023$105,3272025-12
David & Karen Pecker Foundation501(c)(3)1998$5.5 million2024-12
David and Caole Caplan Charitable Foundation501(c)(3)2011$4 million2024-12
Derek and Leora Kaufman Foundation501(c)(3)2019$1.3 million2024-12
Enthoven Foundation Inc501(c)(3)1998$372,9332025-06
Feinberg Family Foundation501(c)(3)1998$2 million2025-12
Finninsula Foundation Inc501(c)(3)2000$452,0512025-05
Floren Family Foundation501(c)(3)2001$2.7 million2025-10
Frascella Family Foundationcorporation501(c)(3)2007$692,9962024-12
Fred J Epstein Pediatric Carefoundation Inc501(c)(3)2009$47,0762025-06
Georges Family Foundation Inc501(c)(3)1999$376,8402025-12
Gilbert Family Foundation501(c)(3)2003$26,7392024-12
Golden Lights Foundation501(c)(3)2022$0$02025-01
Gosin Fam Foundation Trust501(c)(3)2022$5.4 million2025-12
Grip Foundation Inc501(c)(3)2008$9,0502025-12
Happy Birthday Foundation501(c)(3)2020$25,3512025-12
Hartong Family Foundation501(c)(3)2023$5.9 million2025-12
Ianniello Family Charitable Trust501(c)(3)2020$2.5 million2025-12
Iftikar Foundation501(c)(3)2012$7,1842025-09
Ivanhoe Charitable Foundation Inc501(c)(3)2018$1,7702024-12
JDJ Charitable Trust501(c)(3)2002$962,7082025-06
James and Sophie Zimmerman Family Foundation501(c)(3)2021$129,2002023-09
Jane and Daniel Och Family Foundation501(c)(3)2009$570.1 million2024-12
Johnson-Stillman Family Foundation Trust501(c)(3)1996$6 million2024-12
Jon & Kathy Savitz Foundation501(c)(3)2000$1.5 million2025-10
Kanarek Family Foundation501(c)(3)2007$958,6752025-06
Kasama Crinkles Inc501(c)(3)2025$0$02025-12
Kim and Martin Sands Family Foundation Inc501(c)(3)2018$213,1232024-12
Kirmar Foundation501(c)(3)2015$3.4 million2024-12
Kozlowski Family Foundation501(c)(3)1998$75,2952025-12
Lone Pine Foundation Inc501(c)(3)2002$58.6 million2024-12
Luke Harkness Memorial Fund501(c)(3)2001$0$02024-12
Marie Fauth Charitable Trust501(c)(3)2005$6.9 million2025-09
Marsha Lilien Gladstein Foundation501(c)(3)2000$12.8 million2025-12
Massive Family Foundation501(c)(3)2025$847,9142024-12
Mattis Family Foundation501(c)(3)2005$3.4 million2025-12
Mattis Family Foundation501(c)(3)2022$336,5362025-12
Maurice J & Jane M Cunniffe Foundation Inc501(c)(3)1996$960,2042025-12
McAvity Family Foundation501(c)(3)2009$4.1 million2024-12
Mervat Zahid Cultural Foundation501(c)(3)2014$10.1 million2024-12
Metropoulos Family Foundation501(c)(3)2020$2.6 million2025-12
Michael Whittingham Family Foundation501(c)(3)2023$835,3882025-12
Michael and Carol Lowenstein Foundation Inc501(c)(3)2009$89.4 million2025-10
Mile 26 Foundation501(c)(3)2017$1.7 million2025-12
Mulberry Essence Foundation501(c)(3)2016$49.7 million2024-12
Nancy S Offit Foundation Inc501(c)(3)2017$22,9462025-12
Oakmere Foundation Inc501(c)(3)2015$490,3092025-12
Peak Wellness Foundation Incorporated501(c)(3)1998$562025-12
Pohly Family Foundation501(c)(3)2004$2.3 million2025-12
RHR Charitable Foundation Inc501(c)(3)2015$4 million2025-12
Raymond Falk Foundation501(c)(3)2022$6.3 million2025-12
Redbird Foundation Inc501(c)(3)2022$12025-12
Richard Paul and Ellen S Richman Private Family Foundation Trust Agre501(c)(3)2009$107,6492025-12
Riversville Foundation501(c)(3)2001$35.9 million2024-12
Robert W Matschullat Family Foundation501(c)(3)2002$7812025-12
Rosencrans Family Foundation Inc501(c)(3)1998$340,0242025-12
Rouhana Family Foundation Inc501(c)(3)1997$5012025-11
Russel R Taylor Foundation501(c)(3)1997$2.6 million2025-04
Ruth W Brown Foundation501(c)(3)1995$1.9 million2025-12
Rutledge Family Foundation501(c)(3)2016$43.5 million2025-11
S & L Marx Foundation Inc501(c)(3)2004$83.1 million2024-12
Santoro Family Charitable Foundation501(c)(3)2008$87,0902025-12
Sarah Bodman Greenhill Foundation501(c)(3)2023$790,3272025-12
Schiele Family Foundation Inc501(c)(3)2000$15,3922024-12
Schwarz Charitable Foundation501(c)(3)2015$204,0232025-12
Selander Foundation501(c)(3)2005$35.3 million2024-11
Sheldon and Marilyn Fireman Familyfoundation Inc501(c)(3)2008$12024-12
Silverbird 29 Fund501(c)(3)2018$16.7 million2024-12
Simpson Lighthouse Foundation501(c)(3)2019$508,6632024-12
Sonja Foundation Trust501(c)(3)2004$123,0182025-12
Stephen W Craig Family Foundation Inc501(c)(3)2013$403,0192025-11
Steven C Klausner Charitable Trust DTD 2-28-19501(c)(3)2019$153,8292025-12
Stone Point Capital Foundation Inc501(c)(3)2001$12024-12
Sugar Hill JLC Foundation501(c)(3)2025
Susan and Eliot Black Foundation501(c)(3)1999$3.9 million2025-12
Tabgha Love Foundation501(c)(3)2007$9,7182024-06
The Arthur E Landi & Mairead N O Su Llivan Foundation Inc501(c)(3)2026
The Donald M Kendall Sr and Sigrid RVC Kendall Foundation501(c)(3)2014$16.7 million2024-12
The Higgins Family Foundation501(c)(3)1999$2 million2024-12
The Lynn and Robert Aimmer Family Foundation for John Dalsheim501(c)(3)2004$893,2802025-12
The Lynn and Robert Zimmer Family Foundation501(c)(3)2000$1.3 million2025-12
The Mary Ann and Lawrence Tucker Foundation501(c)(3)2004$33,4382024-12
The Parkinson Family Charitable Foundation Incorporated501(c)(3)1998$1.5 million2025-12
The Per and Astrid Heidenreich Family Foundation501(c)(3)2005$17.9 million2025-12
The Pinkus Foundation501(c)(3)2000$2.2 million2025-10
The Pray Family Foundation Inc501(c)(3)2013$7.1 million2024-12
The Robert A and Elizabeth R Jeffe Foundation501(c)(3)1998$7.8 million2025-12
The@john S Hilson Family Fund501(c)(3)2025$2.1 million2025-12
Urfirer Family Foundation501(c)(3)2008$102024-12
Vazomica Foundation Inc501(c)(3)1999$328,4702025-12
Vijaya Foundation501(c)(3)2007$5 million2025-12
WD and JG McCoy Family Foundation Inc501(c)(3)2013$588,6842022-12
Walter and Monica Noel Family Foundation501(c)(3)2000$26,0562024-12
Warren Foundation Inc501(c)(3)1997$203,2232025-12
William C Shanley III Private Charitable Foundation Trust501(c)(3)1999$5.5 million2025-09
William S and Ann H Bucknall501(c)(3)2002$575,6542024-12
Wolverine Foundation501(c)(3)2020$29.1 million2025-12
Wright Foundation Inc501(c)(3)2001$21.4 million2025-12
Zoom Foundation501(c)(3)2001$1.25 billion2025-06

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Every nonprofit in Greenwich, CT · Philanthropy, voluntarism and grantmaking foundations nonprofits across the state · Nonprofits in every city of the state

Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.