| NORWALK HOSPITAL ASSOCIATION, THENorwalk, CT · Active | Norwalk, CT | Corporation | Jan 11, 1893 | Active |
| WESTERN CONNECTICUT HEALTH NETWORK, INC.Danbury, CT · Active | Danbury, CT | Corporation | Feb 15, 1985 | Active |
| SFI CORP.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Aug 29, 1990 | Withdrawn |
| CONECO ENVIRONMENTAL CORP.-CTGlastonbury, CT · Merged | Glastonbury, CT | Corporation | Jun 16, 1995 | Merged |
| P.C. SOLUTIONS SOFTWARE DEVELOPMENT, INC.Woodstock Valley, CT · Dissolved | Woodstock Valley, CT | Corporation | Sep 13, 1999 | Dissolved |
| COUNTRYWIDE INVESTMENT SERVICES, INC.Hartford, CT · Withdrawn | Hartford, CT | Corporation | Jan 23, 2001 | Withdrawn |
| Feldman, Perlstein, Burchman & Freitas, LLCFarmington, CT · Active | Farmington, CT | LLC | Apr 18, 2001 | Active |
| COUNTRYWIDE INVESTMENT SERVICES, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Aug 16, 2007 | Withdrawn |
| VASSAR HEALTH CONNECTICUT, INC.Sharon, CT · Active | Sharon, CT | Corporation | Sep 8, 2016 | Active |
| HEALTH QUEST SYSTEMS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jun 26, 2017 | Active |
| PUTNAM HOSPITAL CENTER, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 30, 2017 | Active |
| NORTHERN DUTCHESS HOSPITAL, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 30, 2017 | Active |
| VASSAR BROTHERS HOSPITAL, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Nov 6, 2017 | Active |
| NUVANCE HEALTH INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jul 1, 2019 | Active |
| I-DEAL OPTICS HOLDINGS, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Mar 13, 2020 | Withdrawn |
| HEALTH QUEST HOME CARE, INC. (CERTIFIED)Location not reported, CT · Active | Location not reported, CT | Corporation | Jan 15, 2021 | Active |
| The Blake Foundation, Inc.Vernon, CT · Active | Vernon, CT | Corporation | Feb 17, 2022 | Active |
| Roxbury Housing Trust, Inc.Roxbury, CT · Active | Roxbury, CT | Corporation | Oct 24, 2022 | Active |
| DMF Services LLCStamford, CT · Active | Stamford, CT | LLC | Nov 7, 2022 | Active |
| Consortium for Sustainable Development IncHigganum, CT · Active | Higganum, CT | Corporation | Jan 12, 2023 | Active |