| OXFORD HEALTH PLANS (CT), INC.Shelton, CT · Active | Shelton, CT | Corporation | Apr 18, 1985 | Active |
| SPECTERA,INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Aug 6, 1985 | Active |
| UNITEDHEALTHCARE OF NEW ENGLAND, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Feb 6, 1986 | Active |
| ALMOST FAMILY, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | May 29, 1986 | Active |
| UNITED HEALTHCARE SERVICES, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Nov 27, 1990 | Active |
| DENTAL BENEFIT PROVIDERS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jan 18, 1991 | Active |
| UNITED BEHAVIORAL HEALTH, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 31, 1991 | Active |
| PROHEALTH PHYSICIANS, INC.Farmington, CT · Active | Farmington, CT | Corporation | Nov 13, 1996 | Active |
| PROHEALTH PHYSICIANS, P.C.Farmington, CT · Active | Farmington, CT | Corporation | Dec 2, 1996 | Active |
| OPTUMINSIGHT, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jan 17, 1997 | Active |
| CHANGE HEALTHCARE PRACTICE MANAGEMENT SOLUTIONS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Feb 13, 1998 | Active |
| UHIC HOLDINGS, INC.Hartford, CT · Active | Hartford, CT | Corporation | Jan 27, 1999 | Active |
| OVATIONS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Mar 24, 1999 | Active |
| UNIMERICA INSURANCE COMPANYLocation not reported, CT · Active | Location not reported, CT | Corporation | Jan 28, 2000 | Active |
| UMR, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jul 12, 2000 | Active |
| HEALTHSCOPE BENEFITS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Feb 28, 2001 | Active |
| HEALTHSMART PREFERRED NETWORK II, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jul 24, 2001 | Active |
| P2P LINK, LLCLocation not reported, CT · Active | Location not reported, CT | LLC | Jun 3, 2002 | Active |
| OPTUMRX PBM OF ILLINOIS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Dec 23, 2002 | Active |
| OPTUM GOVERNMENT SOLUTIONS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Sep 24, 2003 | Active |
| PRONOUNCED HEALTH SOLUTIONS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Dec 29, 2003 | Active |
| BRIOVARX OF MAINE, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | May 24, 2004 | Active |
| OPTUM PUBLIC SECTOR SOLUTIONS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jul 18, 2006 | Active |
| PLUS ONE HOLDINGS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Feb 27, 2007 | Active |
| HEALTHPLEX OF CT, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | May 8, 2007 | Active |
| GETHEALTHINSURANCE.COM AGENCY INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jun 28, 2007 | Active |
| OPTUMRX, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Mar 31, 2008 | Active |
| CHANGE HEALTHCARE CORRESPONDENCE SERVICES, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Aug 5, 2008 | Active |
| HEALTHMARKETS INSURANCE AGENCY, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jun 29, 2009 | Active |
| MARCH VISION CARE GROUP, INCORPORATEDLocation not reported, CT · Active | Location not reported, CT | Corporation | Aug 14, 2009 | Active |
| OPTUMSERVE HEALTH SERVICES, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Feb 16, 2010 | Active |
| OPTUMINSIGHT LIFE SCIENCES, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Apr 21, 2010 | Active |
| OPTUMRX PBM OF WISCONSIN, LLCLocation not reported, CT · Active | Location not reported, CT | LLC | Nov 8, 2010 | Active |
| THE LEWIN GROUP, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | May 26, 2011 | Active |
| OPTUM CARE NETWORKS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 20, 2011 | Active |
| HEALTHSMART BENEFIT SOLUTIONS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Nov 14, 2011 | Active |
| OPTUM MEDICAL SERVICES, P.C.Location not reported, CT · Active | Location not reported, CT | Corporation | Dec 23, 2011 | Active |
| XLHOME, P.C.Location not reported, CT · Active | Location not reported, CT | Corporation | Feb 24, 2012 | Active |
| CYPRESS CARE, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Apr 5, 2012 | Active |
| PROCURA MANAGEMENT, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jun 13, 2012 | Active |
| OPTUM CARE SERVICES COMPANYLocation not reported, CT · Active | Location not reported, CT | Corporation | Apr 30, 2013 | Active |
| OPTUM SERVICES, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 31, 2013 | Active |
| SOLSTICE OF NEW YORK INCLocation not reported, CT · Active | Location not reported, CT | Corporation | Nov 12, 2013 | Active |
| OPTUM360 SERVICES, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jan 23, 2014 | Active |
| DIPLOMAT PHARMACY, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Feb 6, 2014 | Active |
| GOLDEN OUTLOOK, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jul 24, 2014 | Active |
| BRACOR, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 8, 2014 | Active |
| NAVIHEALTH, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 27, 2014 | Active |
| SOLSTICE BENEFIT SERVICES, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Dec 22, 2014 | Active |
| EXCELSIOR INSURANCE BROKERAGE, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jul 7, 2016 | Active |