| SOURGASCO, INC. | — | 235814 | 1978-08-29 | | Gulfport |
| SOUTH CAROLINA STEEL CORPORATION | Construction | 401659 | 1978-10-16 | Revoked | Gulfport |
| SOUTH CENTRAL ASSOCIATED NETWORK, CORPORATION | — | 235827 | 1978-01-17 | Dissolved | |
| SOUTH CENTRAL ELECTRIC, INC. | — | 401668 | 1978-08-15 | Dissolved | |
| SOUTH CENTRAL EQUIPMENT CO., INC. | — | 401670 | 1978-06-05 | Revoked | MOBILE |
| SOUTH CENTRAL MISSISSIPPI RURAL HEALTH ASSOCIATION, INC. | — | 401678 | 1978-06-07 | Active | MENDENHALL |
| SOUTH CENTRAL MOBILE HOMES, INC. | — | 235843 | 1978-01-13 | Dissolved | |
| SOUTH DELTA HEALTH CARE, INC. | — | 235867 | 1978-08-30 | Dissolved | |
| SOUTH FORREST ROSE NURSERY, INC. | — | 401721 | 1978-11-08 | Dissolved | HATTIESBURG |
| SOUTH JACKSON LEASED HOUSING CORPORATION | — | 401735 | 1978-11-28 | Active | LOUISVILLE |
| SOUTH LAND FOODS, INC. | — | 401741 | 1978-11-16 | Dissolved | |
| SOUTH MADISON COUNTY HEALTH SERVICES, INC. | — | 401748 | 1978-08-23 | Active | RIDGELAND |
| SOUTH MISSISSIPPI DOG TRAINING ASSOCIATION, INC. | — | 401771 | 1978-05-12 | | LONG BEACH |
| SOUTH MISSISSIPPI SOCCER CLUB, INC. | — | 401806 | 1978-07-05 | Active | GULFPORT |
| SOUTH WAYNE HUNTING CLUB, INC. | — | 401845 | 1978-10-30 | | WAYNESBORO |
| SOUTH, INC. | — | 401731 | 1978-08-18 | Dissolved | PASCAGOULA |
| SOUTHAVEN RECREATION CENTER, INC. | — | 401872 | 1978-10-02 | Dissolved | |
| SOUTHEAST BEVERAGE, INC. | — | 401884 | 1978-12-13 | Dissolved | |
| SOUTHEAST MISSISSIPPI BANK, QUITMAN, MISSISSIPPI | — | 401898 | 1978-07-27 | Active | Quitman |
| SOUTHEAST PIPELINE CONTRACTORS, INC. | Construction | 401914 | 1978-05-29 | | Gulfport |
| SOUTHEASTERN ARMATURE WORKS, INC. | — | 236001 | 1978-09-22 | Merged | |
| SOUTHEASTERN ARMATURE WORKS, INC. | — | 328408 | 1978-09-22 | Merged | |
| SOUTHEASTERN BURIAL ASSOCIATION, INCORPORATED | — | 401931 | 1978-10-27 | Dissolved | MERIDIAN |
| SOUTHEASTERN FOAM PRODUCTS, INC. | — | 401946 | 1978-02-08 | Revoked | Gulfport |
| SOUTHEASTERN HEALTH FACILITIES, INC. | Health care and social assistance | 401947 | 1978-02-17 | Active | Jackson |
| SOUTHEASTERN MOTORS, INC. | — | 236050 | 1978-01-17 | Dissolved | |
| SOUTHEASTERN PORCELAIN & CONSTRUCTION COMPANY, INC. | — | 401958 | 1978-06-05 | Revoked | Madison |
| SOUTHEASTERN PROPERTIES, INC. | — | 236056 | 1978-08-28 | Dissolved | |
| SOUTHEASTERN RESOURCES CORPORATION | — | 236059 | 1978-09-08 | Revoked | MEMPHIS |
| SOUTHEASTERN, LTD. | — | 328447 | 1978-08-10 | Dissolved | |
| SOUTHEASTERN, LTD. | — | 236040 | 1978-08-10 | Dissolved | |
| SOUTHERN AERO, INC. | — | 401984 | 1978-12-01 | Dissolved | SHAW |
| SOUTHERN AIR COMFORT, INC. | — | 401989 | 1978-04-17 | Active | Iuka |
| SOUTHERN ANESTHETIST, INC. | — | 401991 | 1978-10-23 | Dissolved | |
| SOUTHERN ASSOCIATION OF THE AMATEUR ATHLETIC UNION | — | 401994 | 1978-07-18 | Canceled | HATTIESBURG |
| SOUTHERN AUDIO, INC. | — | 327502 | 1978-04-14 | Dissolved | |
| SOUTHERN BRIDGE ERECTORS, INC. | — | 327540 | 1978-02-14 | Revoked | ALABASTER |
| SOUTHERN CAPITAL SAVINGS CORPORATION | — | 402037 | 1978-10-31 | Canceled | ATLANTA |
| SOUTHERN CB COUNCIL, INC. | — | 402034 | 1978-09-01 | Active | GREENVILLE |
| SOUTHERN COALITION ON JAILS AND PRISONS, INC. | — | 402043 | 1978-09-05 | Active | JACKSON |
| SOUTHERN COMMERCIAL GROUP, LTD. | — | 402053 | 1978-06-16 | Dissolved | |
| SOUTHERN CONSULTING CORPORATION | — | 327611 | 1978-02-13 | Revoked | MEMPHIS |
| SOUTHERN DETECTIVE AND TRACER SERVICES, INC. | — | 327643 | 1978-03-03 | Dissolved | |
| SOUTHERN ENERGY OF NATCHEZ, INC. | — | 402111 | 1978-04-25 | Dissolved | |
| SOUTHERN FARMLAND INVESTMENTS, LTD. | — | 402132 | 1978-12-14 | Dissolved | Shelby |
| SOUTHERN FIELD TRIAL CHAMPIONSHIP, INC. | — | 402140 | 1978-01-09 | | POPLARVILLE |
| SOUTHERN FOODS, INC. | — | 402153 | 1978-05-02 | Dissolved | |
| SOUTHERN HARVESTORE SYSTEMS, INC. | — | 327776 | 1978-09-29 | Canceled | Madison |
| SOUTHERN HEALTH SERVICES OF KENTUCKY, INC. | — | 402175 | 1978-10-13 | Canceled | Gulfport |
| SOUTHERN HOME FURNITURE AND APPLIANCES, INC. | — | 327791 | 1978-06-02 | Dissolved | |