| ADVANCED PERMANENT COSMETICS, LLC. | 721045 | 2002-08-09 | Dissolved | SENATOBIA |
| Advanced Pet Care, Inc. | 688410 | 2000-06-21 | Active | HATTIESBURG |
| Advanced Pharma Investments, LLC | 1192338 | 2019-10-29 | Dissolved | Gulfport |
| Advanced Pharmaceuticals, LLC | 1076984 | 2015-10-01 | Dissolved | OCEAN SPRINGS |
| Advanced Pharmacy Solutions, LLC | 945609 | 2009-02-26 | Dissolved | SOUTHAVEN |
| ADVANCED PHARMACY SOLUTIONS, LLC | 741186 | 2003-10-29 | — | Madison |
| ADVANCED PHYSICAL THERAPY OF SOUTH MISSISSIPPI, LLC | 741522 | 2003-11-06 | Dissolved | PURVIS |
| ADVANCED PHYSICAL THERAPY, L.L.C. | 678503 | 1999-11-12 | Dissolved | Gulfport |
| Advanced Physical Therapy, LLC | 994102 | 2012-01-09 | Active | Olive Branch |
| Advanced Physicians, S.C. | 1507609 | 2025-09-09 | Active | Madison |
| Advanced Planning & Development LLC | 944781 | 2009-02-10 | Dissolved | — |
| Advanced Planning & Development Solutions, LLC | 929315 | 2008-03-25 | Dissolved | — |
| Advanced Planning & Development, LLC | 1095081 | 2016-06-15 | Dissolved | — |
| Advanced Planning Services, Inc. | 888736 | 2006-03-16 | Dissolved | SAN DIEGO |
| ADVANCED PLASTICS, INC. | 103165 | 1972-03-16 | Dissolved | SHERMAN |
| ADVANCED PLATING TECHNOLOGY, INC. | 616225 | 1995-03-20 | Dissolved | — |
| ADVANCED PLUMBING AND DRAIN, INC. | 727616 | 2003-01-09 | Dissolved | Tupelo |
| ADVANCED PLUMBING CO., INC. | 1403253 | 2023-07-24 | Active | Olive Branch |
| Advanced Plumbing Construction LLC | 1187162 | 2019-08-27 | Dissolved | Saltillo |
| Advanced Plumbing Contstruction Inc. | 1050016 | 2014-08-25 | Dissolved | — |
| ADVANCED PLUMBING SERVICES LLC | 1185545 | 2019-08-08 | Dissolved | JACKSON |
| Advanced Plumbing Solutions LLC | 1181608 | 2019-06-24 | Dissolved | Ocean Springs |
| Advanced Plumbing, LLC | 1145993 | 2018-05-02 | Active | Columbia |
| Advanced Police Consultants, LLC | 1053459 | 2014-10-13 | Dissolved | Waveland |
| Advanced Police Training, LLC | 914072 | 2007-06-14 | Dissolved | Biloxi |
| Advanced Portfolio Group LLC | 1145696 | 2018-04-30 | Revoked | Gulfport |
| Advanced Power & Lighting, LLC | 1024132 | 2013-07-10 | Merged | Gulfport |
| Advanced Power Clean LLC | 1445011 | 2024-06-05 | Active | gulfport |
| Advanced Power Control, LLC | 1097695 | 2016-07-26 | Revoked | Madison |
| Advanced Power Services Inc. | 937093 | 2008-08-21 | Dissolved | Brandon |
| Advanced Power Technologies, LLC | 930020 | 2008-04-07 | Revoked | Gulfport |
| Advanced Practice Management, LLC | 933792 | 2008-06-17 | Dissolved | NATCHEZ |
| Advanced Practice Solutions LLC | 1034906 | 2014-01-27 | Withdrawn | JACKSON |
| ADVANCED PRECISION GROUP LLC | 1160934 | 2018-11-02 | Active | Gulfport |
| ADVANCED PRECISION, INCORPORATED | 636019 | 1996-11-11 | Dissolved | — |
| Advanced Pressure Washing Services LLC | 1038936 | 2014-04-01 | Active | Raymond |
| Advanced Printing llc | 1251940 | 2021-01-15 | Active | Tupelo |
| ADVANCED PRIVATE INVESTIGATIONS AND COMPUTER FORENSICS INC. | 965040 | 2010-04-20 | Dissolved | — |
| Advanced Probation Services, Inc. | 891022 | 2006-04-25 | Dissolved | McComb |
| ADVANCED PROCESSES AND TECHNIQUES, INC. | 588422 | 1992-05-21 | Active | CALHOUN CITY |
| ADVANCED PRODUCTS CORPORATION OF AMERICA | 130772 | 1968-05-15 | Dissolved | — |
| ADVANCED PRODUCTS, INC. | 728406 | 2003-01-21 | Active | SEMINARY |
| ADVANCED PROFESSIONAL CLEANING, INC. | 650189 | 1997-12-11 | Dissolved | — |
| Advanced Professional Consultants, LLC | 888394 | 2006-03-13 | Dissolved | Tupelo |
| Advanced Professional Health Care | 965217 | 2010-04-20 | Active | Greenwood |
| ADVANCED PROFESSIONAL SERVICES LLC | 1545635 | 2026-04-29 | Active | Madison |
| Advanced Project Controls, LLC | 1268268 | 2021-03-24 | Active | Union Church |
| Advanced Project Services, LLC | 857668 | 2004-07-02 | Dissolved | — |
| Advanced Project Solutions, LLP | 1178615 | 2019-05-20 | Active | JACKSON |
| Advanced Properties, LLC | 1137356 | 2018-01-26 | Active | Gulfport |