| DIGITAL SYSTEMS X, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Sep 30, 2025 | Active |
| PATHWAYS EARLY COLLEGE ACADEMY, INC.Location not reported, FL · Active | Location not reported, FL | Nonprofit | Aug 27, 2025 | Active |
| RIDE SERVICES LLCLocation not reported, FL · Inactive | Location not reported, FL | LLC | Aug 14, 2025 | Inactive |
| Ride Mobility LLCPasadena, CA · Active | Pasadena, CA | LLC | Aug 7, 2025 | Active |
| CENTURY CRUISES INCLocation not reported, FL · Active | Location not reported, FL | Corporation | Jul 10, 2025 | Active |
| Prat City LLCPasadena, CA · Active | Pasadena, CA | LLC | Jan 3, 2025 | Active |
| RIDE MOBILITY LLCLocation not reported, FL · Active | Location not reported, FL | LLC | May 13, 2024 | Active |
| Sato Homes LLCPasadena, CA · Active | Pasadena, CA | LLC | Apr 14, 2024 | Active |
| DE NOVO SOFTWARE, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Aug 18, 2023 | Active |
| FLOWER STREET PICTURES LLCLocation not reported, FL · Active | Location not reported, FL | LLC | May 15, 2023 | Active |
| GRACKLE LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Apr 12, 2023 | Active |
| Hlm 3, LLCPasadena, CA · Active | Pasadena, CA | LLC | Feb 20, 2023 | Active |
| The Kaizen Company, LLCPasadena, CA · Active | Pasadena, CA | LLC | Mar 23, 2022 | Active |
| AKASHA HOMES, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Jan 28, 2022 | Active |
| TETRA TECH EMC, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Jul 2, 2021 | Active |
| ETOMIDATE PROPERTIES, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | May 17, 2021 | Active |
| Prologue Strategy, LLCPasadena, CA · Active | Pasadena, CA | LLC | Mar 15, 2021 | Active |
| BIOVINC, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Sep 22, 2020 | Active |
| GLOBALINK SECURITIES, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Dec 2, 2019 | Active |
| Ldis LLCPasadena, CA · Active | Pasadena, CA | LLC | Sep 25, 2019 | Active |
| THE IRB, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Mar 22, 2019 | Active |
| TETRA TECH RAC CRAFT, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Jul 19, 2018 | Active |
| TETRA TECH BAS, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | May 12, 2016 | Active |
| Tyrannical Tenants, LLCPasadena, CA · Active | Pasadena, CA | LLC | Mar 14, 2013 | Active |
| ZANDER-GREG, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Aug 28, 2012 | Inactive |
| ARROYO INSURANCE SERVICES, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Nov 12, 2009 | Active |
| TETRA TECH EXECUTIVE SERVICES, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Oct 22, 2007 | Active |
| HANG KEE LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Nov 15, 2005 | Active |
| MIKE E. SMITH, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | May 17, 2005 | Active |
| ADVANCED MANAGEMENT TECHNOLOGY, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Mar 15, 2004 | Active |
| TETRA TECH EC, INC.Location not reported, FL · Active | Location not reported, FL | Corporation | Feb 19, 2003 | Active |
| MCKESSON WATER PRODUCTS COMPANY, INC.Albany, NY · Active | Albany, NY | Corporation | Feb 17, 1982 | Active |
| OPTICAL RESEARCH ASSOCIATESNew York, NY · Active | New York, NY | Corporation | Sep 12, 2008 | Active |
| VERTEX CONSULTING SERVICESNew York, NY · Active | New York, NY | Corporation | May 8, 1996 | Active |
| Olive Tree, LLCLocation not reported, AK · Good Standing | Location not reported, AK | LLC | Aug 7, 2017 | Good Standing |
| H3 Engineering Solutions, IncLocation not reported, AK · Good Standing | Location not reported, AK | Corporation | Jun 19, 2024 | Good Standing |
| Tetra Tech Alaska, L.L.C.Location not reported, AK · Good Standing | Location not reported, AK | LLC | Mar 6, 2008 | Good Standing |
| ARROYO INSURANCE SERVICES, INC.Location not reported, AK · Good Standing | Location not reported, AK | Corporation | Feb 12, 2010 | Good Standing |
| TETRA TECH, INC.Location not reported, AK · Good Standing | Location not reported, AK | Corporation | Apr 12, 1988 | Good Standing |
| Tetra Tech EC, Inc.Location not reported, AK · Good Standing | Location not reported, AK | Corporation | Feb 25, 2003 | Good Standing |
| ADVANCED MANAGEMENT TECHNOLOGY, INC.Location not reported, AK · Good Standing | Location not reported, AK | Corporation | Mar 12, 2004 | Good Standing |
| SIMONS, LI & ASSOCIATES, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Jan 15, 1980 | Merged |
| MCKESSON WATER PRODUCTS COMPANY, Colorado Authority Terminated February 1, 2002Location not reported, CO · Revoked | Location not reported, CO | Corporation | Aug 28, 1981 | Revoked |
| FLO ENGINEERING, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Apr 4, 1985 | Merged |
| GEOTRANS, INC., Colorado Authority Relinquished January 22, 2013Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Nov 1, 1988 | Withdrawn |
| TETRA TECH EM INC., Colorado Authority Relinquished January 22, 2013Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Mar 17, 1989 | Withdrawn |
| C.M.I. INSURANCE SERVICES, INC. +, Delinquent February 1, 2014Location not reported, CO · Delinquent | Location not reported, CO | Corporation | Sep 7, 1989 | Delinquent |
| TETRA TECH CONSTRUCTION SERVICES, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Aug 1, 1990 | Merged |
| MCCULLEY, FRICK & GILMAN, INC., Colorado Authority Terminated June 7, 1999Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Jun 3, 1993 | Withdrawn |
| TETRA TECH, INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Jan 4, 1994 | Good Standing |