| AETNA FOUNDATION, INC.Hartford, CT · Pending Merger | Hartford, CT | Corporation | Oct 11, 1972 | Pending Merger |
| AE FOURTEEN, INCORPORATEDHartford, CT · Active | Hartford, CT | Corporation | Sep 16, 1980 | Active |
| AETNA HEALTH INC.Hartford, CT · Active | Hartford, CT | Corporation | Jan 5, 1987 | Active |
| AHP HOLDINGS, INC.Hartford, CT · Active | Hartford, CT | Corporation | May 30, 1989 | Active |
| AETNA LIFE ASSIGNMENT COMPANYHartford, CT · Active | Hartford, CT | Corporation | Jun 30, 1993 | Active |
| AUSHC HOLDINGS, INC.Hartford, CT · Active | Hartford, CT | Corporation | Apr 18, 1997 | Active |
| AETNA INC.Hartford, CT · Active | Hartford, CT | Corporation | Dec 13, 2000 | Active |
| @CREDENTIALS INC.Hartford, CT · Active | Hartford, CT | Corporation | Mar 16, 2001 | Active |
| MENTAL HEALTH ASSOCIATES, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Dec 11, 2003 | Active |
| FIRST HEALTH GROUP CORP.Location not reported, CT · Active | Location not reported, CT | Corporation | Feb 3, 2005 | Active |
| MERITAIN HEALTH, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Mar 24, 2006 | Active |
| GROUP DENTAL SERVICE, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | May 8, 2006 | Withdrawn |
| U.S. HEALTHCARE PROPERTIES, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | May 11, 2006 | Active |
| COVENTRY HEALTH CARE NATIONAL NETWORK, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | May 14, 2008 | Active |
| GROUP DENTAL SERVICE OF MARYLAND, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Aug 4, 2009 | Withdrawn |
| FOCUS HEALTHCARE MANAGEMENT, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Mar 20, 2014 | Revoked |
| AETNA RISK ASSURANCE COMPANY OF CONNECTICUT INC.Hartford, CT · Active | Hartford, CT | Corporation | Oct 3, 2014 | Active |
| AMERICAN HEALTH HOLDING, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jan 14, 2015 | Active |
| Attain Insurance Services Inc.Location not reported, CT · Active | Location not reported, CT | Corporation | Sep 11, 2017 | Active |
| ACTIVE HEALTH MANAGEMENT, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Nov 7, 2017 | Active |