| Vaxcom Services LLCPasadena, CA · Active | Pasadena, CA | LLC | Mar 17, 2023 | Active |
| PTSI MANAGED SERVICES INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Jun 21, 2013 | Active |
| PARSONS CONSTRUCTION GROUP INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Feb 28, 2013 | Active |
| PARSONS SECURE SOLUTIONS INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Oct 15, 2010 | Inactive |
| PARSONS WATER & INFRASTRUCTURE INC.Location not reported, FL · Active | Location not reported, FL | Corporation | May 16, 2003 | Active |
| PARSONS TECHNICAL SERVICES INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Apr 3, 2003 | Active |
| PTSI Managed Services Inc.Location not reported, AK · Good Standing | Location not reported, AK | Corporation | Jun 19, 2013 | Good Standing |
| PARSONS CONSTRUCTORS INC.Location not reported, AK · Good Standing | Location not reported, AK | Corporation | Dec 19, 1978 | Good Standing |
| PARSONS TECHNICAL SERVICES INC.Location not reported, AK · Good Standing | Location not reported, AK | Corporation | Mar 17, 2003 | Good Standing |
| PARSONS WATER & INFRASTRUCTURE INC.Location not reported, AK · Good Standing | Location not reported, AK | Corporation | Jun 16, 2003 | Good Standing |
| PARSONS CONSTRUCTORS INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Dec 18, 1978 | Good Standing |
| PARSONS MAIN, INC., Colorado Authority Terminated March 2, 2005Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Sep 16, 1981 | Withdrawn |
| Parsons RCIE Inc., Colorado Authority Relinquished February 5, 2009Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Nov 16, 2000 | Withdrawn |
| PARSONS WATER & INFRASTRUCTURE INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Feb 24, 2003 | Good Standing |
| Parsons Technical Services Inc.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Mar 13, 2003 | Good Standing |
| Parsons Evergreene, LLC, Colorado Authority Relinquished August 7, 2013Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Dec 14, 2005 | Withdrawn |
| Sparta, Inc., Colorado Authority Relinquished December 11, 2013Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Feb 4, 2008 | Withdrawn |
| Parsons Telecommunication Services Inc., Colorado Authority Relinquished March 11, 2015Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Apr 27, 2010 | Withdrawn |
| Near North America, Inc., Delinquent March 1, 2025Location not reported, CO · Delinquent | Location not reported, CO | Corporation | Oct 20, 2011 | Delinquent |
| TMT Observatory Corporation, Colorado Authority Relinquished February 16, 2017Location not reported, CO · Withdrawn | Location not reported, CO | Nonprofit | Oct 27, 2015 | Withdrawn |
| TMT International Observatory LLC, Colorado Authority Relinquished July 22, 2025Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Oct 27, 2015 | Withdrawn |
| POLARIS ALPHA EQUITY HOLDINGS, LLC, Colorado Authority Relinquished December 20, 2024Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Jan 9, 2018 | Withdrawn |
| PARSONS CONSTRUCTORS INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Dec 18, 1978 | Active |
| PARSONS MAIN, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Sep 10, 1981 | Withdrawn |
| STEINMAN BOYNTON GRONQUIST & BIRDSALL INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Feb 19, 1987 | Withdrawn |
| PARSONS-JURDEN CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jan 20, 1989 | Withdrawn |
| STEINMAN INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jun 5, 1990 | Withdrawn |
| PARSONS ENGINEERING SCIENCE, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Apr 2, 1991 | Withdrawn |
| PROCESS FACILITIES, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Dec 23, 1997 | Withdrawn |
| PARSONS TECHNICAL SERVICES INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Mar 28, 2005 | Active |
| SECURE MISSION SOLUTIONS LLCLocation not reported, CT · Cancelled | Location not reported, CT | LLC | Dec 10, 2012 | Cancelled |
| PTSI MANAGED SERVICES INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jun 19, 2013 | Active |
| PARSONS TECHNICAL SERVICES INC.Location not reported, OR · Active | Location not reported, OR | Corporation | Mar 13, 2003 | Active |
| PARSONS WATER & INFRASTRUCTURE INC.Location not reported, OR · Active | Location not reported, OR | Corporation | May 16, 2003 | Active |
| PARSON CONSTRUCTORS INC. OF DELAWARELocation not reported, OR · Active | Location not reported, OR | Corporation | Jun 23, 1982 | Active |
| PARSONS CONSTRUCTION GROUP INC.Location not reported, OR · Active | Location not reported, OR | Corporation | Mar 1, 2013 | Active |
| PTSI MANAGED SERVICES, INC.Location not reported, OR · Active | Location not reported, OR | Corporation | Jun 19, 2013 | Active |
| PARSONS-MANZER, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | May 24, 1977 | Inactive |
| PARSONS CONSTRUCTORS INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Apr 3, 1979 | Active |
| PARSONS HARLAND BARTHOLOMEW & ASSOCIATES INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Nov 29, 1979 | Inactive |
| C.T. MAIN CONSTRUCTION, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Dec 15, 1981 | Inactive |
| SPARTA INC. AND SUBSIDIARYLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 19, 2001 | Inactive |
| PARSONS RCIE INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Sep 6, 2006 | Inactive |
| PARSONS TELECOMMUNICATION SERVICES INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jun 3, 2010 | Inactive |
| PARSONS-JURDEN CORPORATIONLocation not reported, FL · Inactive | Location not reported, FL | Corporation | May 31, 1994 | Inactive |