| Advanced Diagnostic Pain Center, PLLC | 912751 | 2007-05-21 | Dissolved | JACKSON |
| Advanced Diagnostic Solutions Services LLC | 1308073 | 2021-10-19 | Dissolved | Jackson |
| Advanced Diagnostics Laboratory, LLC | 1185378 | 2019-08-07 | Revoked | Jackson |
| Advanced Digital Solutions, LLC | 1021803 | 2013-05-24 | Revoked | Bardstown |
| ADVANCED DIGITAL TECHNOLOGIES, INC. | 732795 | 2003-04-24 | Dissolved | LAKESITE |
| Advanced Diploma K12 Accreditation LLC | 1218779 | 2020-06-23 | Dissolved | Vancleave |
| Advanced Directives, LLC | 1501667 | 2025-08-04 | Active | Madison |
| Advanced Disposal Recycling Services Gulf Coast, LLC | 959963 | 2010-01-06 | Active | Gulfport |
| Advanced Disposal Recycling Services Gulf Coast, LLC | 936489 | 2008-08-11 | — | Gulfport |
| Advanced Disposal Recycling Services, LLC | 936488 | 2008-08-11 | — | Gulfport |
| Advanced Disposal Services Biloxi Land Holdings, LLC | 981742 | 2011-04-13 | — | Gulfport |
| Advanced Disposal Services Biloxi MRF, LLC | 981738 | 2011-04-13 | Active | Gulfport |
| Advanced Disposal Services Gulf Coast, LLC | 909815 | 2007-04-02 | Withdrawn | Gulfport |
| Advanced Disposal Services Hattiesburg, LLC | 964995 | 2010-04-19 | — | Gulfport |
| Advanced Disposal Services Mississippi, LLC | 914894 | 2007-06-28 | Active | Gulfport |
| Advanced Distribution Services (Memphis) LLC | 1011629 | 2012-11-26 | Withdrawn | Gulfport |
| ADVANCED DISTRIBUTOR PRODUCTS LLC | 718080 | 2002-06-03 | Active | Madison |
| ADVANCED DRAINAGE SYSTEMS, INC. | 607090 | 1994-05-05 | Active | Gulfport |
| Advanced Drilling Solutions LLC | 1084247 | 2016-01-26 | Revoked | FLOWOOD |
| ADVANCED DRIVING ACADEMY, INC. | 636621 | 1996-12-09 | Active | Hernando |
| ADVANCED DRIVING INSTITUTE, INC. | 698534 | 2001-02-26 | Dissolved | CLEVELAND |
| ADVANCED DRYWALL TECHNIQUES, INC. | 691673 | 2000-09-07 | Dissolved | Gulfport |
| Advanced E-Billing Solutions, LLC | 918781 | 2007-09-07 | Dissolved | — |
| Advanced Ear, Nose & Throat Speciality Clinic PLLC | 924985 | 2008-01-07 | Active | Tupelo |
| ADVANCED EAR, NOSE & THROAT, P.C. | 1515616 | 2025-11-04 | Active | JACKSON |
| ADVANCED EDUCATION PLAN, INC. | 130769 | 1967-12-04 | Dissolved | — |
| ADVANCED EDUCATION, INC. | 103161 | 1971-11-09 | Revoked | WILMINGTON |
| ADVANCED ELECTRIC COMPANY, INC. | 687664 | 2000-06-02 | Revoked | Madison |
| Advanced Electric Contractors, Inc. | 946157 | 2009-03-09 | Canceled | Gulfport |
| Advanced Electric of Hattiesburg, LLC | 875577 | 2005-07-22 | Dissolved | — |
| Advanced Electrical and Electronics, Inc. | 872729 | 2005-05-23 | Dissolved | — |
| ADVANCED ELECTRICAL SERVICE LLC | 728567 | 2003-01-28 | Dissolved | — |
| ADVANCED ELECTRICAL SERVICES OF NETTLETON, INC. | 721499 | 2002-08-19 | Active | Saltillo |
| Advanced Electrical Services, LLC | 1061939 | 2015-02-26 | Dissolved | — |
| Advanced Electrical Systems, Inc. | 885471 | 2006-01-25 | Dissolved | Gulfport |
| ADVANCED ELECTROLYSIS CENTRE, INC. | 568999 | 1990-01-08 | Dissolved | — |
| Advanced Electronic Source, LLC | 907557 | 2007-02-23 | Dissolved | — |
| ADVANCED ELECTRONIC SYSTEMS AND SECURITY INC. | 724504 | 2002-10-28 | Dissolved | — |
| ADVANCED EMPLOYMENT CONCEPTS, INCORPORATED | 637832 | 1997-01-09 | Revoked | SAN ANTONIO |
| Advanced Employment Group | 1516926 | 2025-11-13 | Active | JACKSON |
| ADVANCED EMPLOYMENT SERVICES, INC. | 611539 | 1994-10-13 | — | MURFREESBORO |
| ADVANCED ENERGY SAVINGS LLC | 1387529 | 2023-04-07 | Dissolved | FLOWOOD |
| Advanced Energy Solutions AES, LLC | 1009276 | 2012-10-10 | Dissolved | — |
| ADVANCED ENERGY SYSTEMS, INC. | 103162 | 1981-05-05 | Dissolved | — |
| Advanced Engineering and Environmental Services, LLC | 1419593 | 2023-11-22 | Active | Madison |
| ADVANCED ENGINEERING RESOURCES, INC. | 629506 | 1996-04-25 | Active | MADISON |
| ADVANCED ENGINEERING, INC. | 706673 | 2001-09-04 | Active | Gulfport |
| Advanced Environmental & Septic Tank Cleaning LLC | 1193638 | 2019-11-13 | Active | Purvis |
| Advanced Environmental Applications LLC | 991036 | 2011-10-27 | Dissolved | Jackson |
| ADVANCED ENVIRONMENTAL CONSTRUCTION, INC. | 620836 | 1995-07-31 | Dissolved | — |