| Advanced Building Concepts, Inc. | — | 865167 | 2004-12-20 | Dissolved | Ridgeland |
| ADVANCED BUILDING CONTRACTORS, Inc. | Construction | 1129435 | 2017-10-04 | Dissolved | GULFPORT |
| ADVANCED BUILDING CONTRACTORS, INCORPORATED | — | 594639 | 1993-02-04 | Dissolved | HATTIESBURG |
| Advanced Building LLC | — | 1397484 | 2023-06-12 | Dissolved | Jackson |
| Advanced Building Services LLC | Construction | 1233103 | 2020-09-01 | Dissolved | Pass Christian |
| Advanced Building Services, LLC | — | 897466 | 2006-08-18 | Dissolved | — |
| Advanced Building Solutions, LLC | — | 890292 | 2006-04-12 | Active | Tupelo |
| ADVANCED BUILDING SPECIALTIES, INC. | Construction | 572530 | 1990-06-01 | Active | PETAL |
| ADVANCED BUILDING SYSTEMS, INC. | — | 565560 | 1989-08-11 | Revoked | — |
| ADVANCED BUILDING SYSTEMS, INC. | — | 528581 | 1986-03-10 | Dissolved | — |
| Advanced Building Systems, LLC | — | 888785 | 2006-03-17 | Dissolved | — |
| Advanced Business Enterprises,LLC | Construction | 1195553 | 2019-12-09 | Dissolved | Jackson |
| ADVANCED BUSINESS EQUIPMENT CORPORATION | — | 515714 | 1984-04-19 | Dissolved | — |
| Advanced Business Solutions RPH | Professional services | 1405333 | 2023-08-04 | Active | BRANDON |
| ADVANCED BUSINESS SOLUTIONS, INC. | — | 570782 | 1990-03-22 | Dissolved | CLINTON |
| Advanced Business Solutions, LLC | Professional services | 884309 | 2006-01-06 | Dissolved | Starkville |
| ADVANCED BUSINESS SYSTEMS, INC. | — | 8706321 | 1987-12-23 | Dissolved | MCCOMB |
| ADVANCED BUSINESS SYSTEMS, L.L.C. | — | 677945 | 1999-11-01 | Active | PASS CHRISTIAN |
| Advanced Business Technical Solutions LLC | Professional services | 1016884 | 2013-03-05 | Dissolved | Jackson |
| Advanced Cabinets, Inc | — | 923195 | 2007-11-30 | Dissolved | — |
| ADVANCED CALL CENTER TECHNOLOGIES, LLC | — | 644144 | 1997-06-27 | — | Gulfport |
| ADVANCED CALL CENTER TECHNOLOGIES, LLC | Administrative and waste services | 740499 | 2003-10-13 | Active | Gulfport |
| Advanced Capital Resources, LLC | — | 878907 | 2005-09-29 | Dissolved | Saint Augustine |
| Advanced Capital Solutions INC | Administrative and waste services | 1111860 | 2017-02-17 | Active | Hattiesburg |
| Advanced Capital USA, Inc. | — | 873995 | 2005-06-16 | Dissolved | CARSON CITY |
| Advanced Cardiac Imaging Solutions, LLC | — | 1010609 | 2012-11-01 | Dissolved | — |
| Advanced Care House Calls of Mississippi, LLC | Health care and social assistance | 1155122 | 2018-08-22 | Active | Hattiesburg |
| ADVANCED CARE MANAGEMENT LLC | — | 723775 | 2002-10-09 | Dissolved | RIDGELAND |
| Advanced Care Monitoring LLC | — | 965658 | 2010-05-03 | Dissolved | — |
| Advanced Care Transportation Plus LLC | Transportation and warehousing | 1332633 | 2022-03-30 | Dissolved | Jackson |
| ADVANCED CARE, INC. | — | 728687 | 2003-01-30 | Dissolved | IUKA |
| Advanced Carpet & Rug Care, LLC | Administrative and waste services | 1147154 | 2018-05-17 | Active | Purvis |
| Advanced Case Development, LLC | — | 954874 | 2009-09-09 | Dissolved | JACKSON |
| Advanced Case Management, LLC | — | 1021941 | 2013-05-28 | Dissolved | Houston |
| Advanced Casino Solutions, Inc. | Information | 1503294 | 2025-08-13 | Active | Gulfport |
| ADVANCED CASINO SYSTEMS CORPORATION | — | 607408 | 1994-05-17 | Canceled | LAS VEGAS |
| ADVANCED CATV CONSTRUCTION, INC. | — | 103158 | 1979-02-19 | Dissolved | — |
| Advanced Cellular Enterprises, Inc. | Information | 1094411 | 2016-06-06 | Revoked | Gautier |
| ADVANCED CELLULAR TECHNOLOGY INC. | Finance and insurance | 741306 | 2003-10-31 | Dissolved | Gulfport |
| Advanced Chemical Consultants, LLC | Professional services | 1378516 | 2023-02-13 | Active | Hattiesburg |
| ADVANCED CHENEGA SERVICES, LLC | Health care and social assistance | 1543424 | 2026-04-20 | Active | Jackson |
| ADVANCED CHIROPRACTIC INFORMATION SERVICES & CLINICS, LTD. | — | 594633 | 1993-02-04 | Dissolved | RIDGELAND |
| ADVANCED CHIROPRACTIC RESEARCH INSTITUTE, INC. | — | 657996 | 1998-06-23 | Active | HORN LAKE |
| Advanced Chroni-Care, LLC | Health care and social assistance | 1513609 | 2025-10-21 | Active | Jackson |
| Advanced Claims Technologies LLC | Professional services | 1122934 | 2017-07-11 | Withdrawn | Saucier |
| Advanced Claims Technologies, Inc. | Professional services | 1146182 | 2018-05-04 | Active | Jackson |
| Advanced Cleaning & Restoration, LLC | Administrative and waste services | 924195 | 2007-12-19 | Dissolved | Laurel |
| Advanced Cleaning Crew LLC | Administrative and waste services | 1380679 | 2023-02-27 | Active | Ackerman |
| Advanced Cleaning LLC | Administrative and waste services | 1486142 | 2025-04-18 | Active | Pass Christian |
| Advanced Climate Solutions LLC | Construction | 1164873 | 2019-01-02 | Withdrawn | Oxford |