| American Medical Lending, L.L.C. | 889207 | 2006-03-24 | Dissolved | — |
| AMERICAN MEDICAL MANAGEMENT HOSPITAL GROUP, INC. | 307575 | 1981-06-12 | — | MEMPHIS |
| AMERICAN MEDICAL MANAGEMENT, INC. | 500347 | 1981-06-12 | — | MEMPHIS |
| AMERICAN MEDICAL PLANS OF MISSISSIPPI, INC. | 621484 | 1995-04-03 | Dissolved | JACKSON |
| American Medical Podcast, LLC | 1209812 | 2020-05-04 | Dissolved | Jackson |
| American Medical Procast, LLC | 1208123 | 2020-04-22 | Dissolved | Jackson |
| American Medical Recovery, LLC | 1104280 | 2016-10-28 | Dissolved | Gautier |
| AMERICAN MEDICAL RECRUITING COMPANY | 609244 | 1994-04-15 | Dissolved | — |
| American Medical Rentals, Inc | 903081 | 2006-12-05 | Dissolved | Oxford |
| AMERICAN MEDICAL RESOURCES, INC. | 521953 | 1986-02-10 | Dissolved | — |
| AMERICAN MEDICAL RESPONSE LEASING, INC. | 639091 | 1997-02-12 | Canceled | Madison |
| American Medical Response of Tennessee, Inc. | 1080490 | 2015-12-01 | Active | Madison |
| American Medical Response, Inc. | 894383 | 2006-06-23 | Active | Madison |
| AMERICAN MEDICAL SECURITY OF GREEN BAY, INC. | 613619 | 1994-12-29 | — | Gulfport |
| AMERICAN MEDICAL SECURITY, INC. | 565304 | 1989-07-31 | Canceled | Gulfport |
| AMERICAN MEDICAL SECURITY, INC. | 623014 | 1994-12-29 | Merged | Gulfport |
| AMERICAN MEDICAL SERVICES, INC. | 678746 | 1999-11-18 | Dissolved | JACKSON |
| American Medical Supplies, LLC | 856122 | 2004-06-04 | Dissolved | — |
| American Medical Supply Inc | 863580 | 2004-11-12 | Dissolved | — |
| AMERICAN MEDICAL SUPPLY INC. | 708582 | 2001-10-29 | Dissolved | — |
| AMERICAN MEDICAL SYSTEMS, INC. | 582942 | 1991-09-25 | — | Gulfport |
| AMERICAN MEDICAL SYSTEMS, INC. | 662600 | 1998-10-21 | Revoked | — |
| AMERICAN MEDICAL TESTING, INC. | 713873 | 2002-03-05 | Canceled | Gulfport |
| AMERICAN MEDICAL VENDING, L.L.C. | 657639 | 1998-06-15 | Dissolved | BARTLETT |
| AMERICAN MEDICAL WEIGHT CONTROL CLINIC, INC. | 500090 | 1981-12-10 | Dissolved | — |
| American Medical Women's Association | 1454841 | 2024-08-22 | Active | Quitman |
| AMERICAN MEDICINE COMPANY | 433780 | 1884-09-09 | Inactive | — |
| AMERICAN MEDICINE COMPANY | 433781 | 1933-07-17 | Inactive | — |
| AMERICAN MEDICORP DEVELOPMENT CO. | 529794 | 1986-04-29 | Active | Gulfport |
| AMERICAN MEDPRO, LLC | 622311 | 1995-09-21 | Dissolved | — |
| AMERICAN MEMORIAL SERVICE CORPORATION | 433782 | 1958-07-18 | Inactive | WAYNESBORO |
| AMERICAN MERCANTILE, INC. | 433783 | 1969-05-28 | Dissolved | — |
| American Merchandising Specialists, inc. | 895222 | 2006-07-10 | Active | Gulfport |
| AMERICAN MERCHANTS AND CONSUMERS ASSOCIATION, INC. | 433784 | 1962-01-04 | Inactive | JACKSON |
| American Messaging (AM), Inc. | 865340 | 2004-12-23 | Canceled | Gulfport |
| American Messaging Services, LLC | 689493 | 2000-07-18 | Active | Gulfport |
| AMERICAN METAL CLIMAX, INC. | 433785 | 1960-07-14 | Canceled | Gulfport |
| AMERICAN METAL PRODUCTS COMPANY | 560013 | 1988-12-30 | Revoked | Gulfport |
| AMERICAN METAL SALES, INC. | 651526 | 1998-01-13 | Revoked | Memphis |
| American Metal Solutions, LLC | 888006 | 2006-03-07 | Dissolved | Gulfport |
| AMERICAN METAL WORKS, INC. | 562816 | 1989-04-11 | Merged | BRANDON |
| AMERICAN METAL WORKS, LLC | 743895 | 2003-12-31 | Dissolved | — |
| AMERICAN METAL WORKS, LLC | 738460 | 2003-08-28 | — | — |
| AMERICAN METER SERVICES, INC. | 709482 | 2001-11-19 | Revoked | MONROE |
| AMERICAN METROCOMM CORPORATION | 657318 | 1998-06-05 | Revoked | NEW ORLEANS |
| AMERICAN METROCOMM INTERNET SERVICES CORP. | 657317 | 1998-06-05 | Revoked | NEW ORLEANS |
| AMERICAN METROCOMM LONG DISTANCE CORPORATION | 645787 | 1997-08-13 | Revoked | NEW ORLEANS |
| AMERICAN METROCOMM MISSISSIPPI NETWORKS CORP. | 647885 | 1997-10-08 | Dissolved | — |
| AMERICAN METROCOMM/MISSISSIPPI, INC. | 635951 | 1996-11-07 | Dissolved | NEW ORLEANS |
| American Midstream (Mississippi), LLC | 724013 | 2002-10-16 | Active | JACKSON |