| SOUTHEASTERN SANDBLASTING & COATING, INC. | — | 502321 | 1981-11-16 | Revoked | Gulfport |
| SOUTHEASTERN SPECIALTIES, INC. | — | 502322 | 1981-10-28 | Dissolved | |
| SOUTHEASTERN TEXAS SERVICE COMPANY | — | 502323 | 1981-12-22 | Revoked | AUSTIN |
| SOUTHEASTERN VISION SERVICE PLAN, INC. | — | 401977 | 1981-05-11 | Active | Gulfport |
| SOUTHERN AIRWAYS, INC. | — | 571068 | 1981-04-23 | Dissolved | MADISON |
| SOUTHERN BAKERY TECHNOLOGY COMPANY, INC. | — | 402005 | 1981-09-16 | Merged | |
| SOUTHERN BAPTIST EDUCATIONAL CENTER OF WHITEHAVEN, INC. | — | 402008 | 1981-02-23 | | SOUTHAVEN |
| SOUTHERN BELLE, INC. | — | 402013 | 1981-05-29 | Dissolved | BILOXI |
| SOUTHERN BUSINESS ENTERPRISES, INC. | — | 402027 | 1981-08-17 | Dissolved | |
| SOUTHERN BUSINESS PRODUCTS, INC. | — | 402030 | 1981-08-27 | Dissolved | |
| SOUTHERN BUSINESS SUPPLY COMPANY, INC. | — | 402031 | 1981-08-27 | Dissolved | |
| SOUTHERN BUSINESS SYSTEMS, INC. | — | 402032 | 1981-08-27 | Dissolved | |
| SOUTHERN CERAMIC DISTRIBUTORS, INC. | — | 402039 | 1981-08-04 | Dissolved | |
| SOUTHERN COLONEL HOMES, INC. | Retail trade | 402044 | 1981-08-24 | Dissolved | HATTIESBURG |
| SOUTHERN CONCRETE FLOOR CO. | — | 402059 | 1981-07-07 | Revoked | Madison |
| SOUTHERN CRANE SERVICES, INC. | — | 402071 | 1981-03-25 | Dissolved | |
| SOUTHERN CRAPPIE ASSOCIATION, INC. | — | 502329 | 1981-12-07 | Active | HERNANDO |
| SOUTHERN CULVERT & SUPPLY, INC. | — | 402079 | 1981-04-24 | Dissolved | |
| SOUTHERN DEVELOPMENT CORPORATION OF GULFPORT, INC. | — | 327647 | 1981-01-23 | Dissolved | |
| SOUTHERN DISCOUNT DRUGS OF SENATOBIA, INC. | — | 402094 | 1981-05-25 | Dissolved | COLDWATER |
| SOUTHERN DISCOUNT DRUGS, INC., OF COLDWATER | — | 502331 | 1981-12-31 | Dissolved | COLDWATER |
| SOUTHERN ELECTRICAL CONTRACTORS, INC. | — | 402107 | 1981-03-17 | Dissolved | |
| SOUTHERN EQUIPMENT SERVICES, INC. | — | 402118 | 1981-03-02 | Dissolved | |
| SOUTHERN F. C. B., INC. | — | 402125 | 1981-05-07 | Dissolved | |
| SOUTHERN FANS OF MISSISSIPPI, INC. | — | 510402 | 1981-12-21 | Dissolved | |
| SOUTHERN FARM BUREAU ADVISER, INC. | — | 402126 | 1981-05-15 | Dissolved | JACKSON |
| SOUTHERN FARM BUREAU CASH FUND, INC. | — | 402127 | 1981-10-09 | Canceled | Jackson |
| SOUTHERN FARM BUREAU FUND DISTRIBUTOR, INC. | — | 402129 | 1981-05-15 | Inactive | Jackson |
| SOUTHERN FARM BUREAU UNIVERSAL LIFE INSURANCE COMPANY | — | 502334 | 1981-12-23 | Active | JACKSON |
| SOUTHERN FIRE SAFETY, INC. | — | 502335 | 1981-12-28 | Dissolved | |
| SOUTHERN FLIGHT CORPORATION | — | 502337 | 1981-12-18 | Dissolved | |
| SOUTHERN FORESTRY CONTRACTORS INC. | — | 502338 | 1981-11-04 | Dissolved | |
| SOUTHERN GEOLOGICAL SOCIETY, INC. | — | 402164 | 1981-08-24 | Dissolved | HATTIESBURG |
| SOUTHERN GUARD RAIL CO., INC. | Construction | 402169 | 1981-04-14 | Withdrawn | Gulfport |
| SOUTHERN GUNITE & EQUIPMENT CO., INC. | — | 502339 | 1981-12-07 | Revoked | FLORENCE |
| SOUTHERN H2S SERVICES, INC. | — | 402171 | 1981-01-19 | Dissolved | |
| SOUTHERN HOLDING COMPANY | — | 402182 | 1981-03-13 | Dissolved | |
| SOUTHERN INDUSTRIAL CONTRACTORS, INC. | — | 502341 | 1981-11-12 | Dissolved | |
| SOUTHERN INSURANCE SERVICE OF SOUTH MISSISSIPPI, INC. | — | 503707 | 1981-03-23 | Dissolved | BILOXI |
| SOUTHERN INVESTIGATIVE, INC. | — | 402202 | 1981-10-20 | Dissolved | |
| SOUTHERN LAKES CORP. | — | 402209 | 1981-08-12 | Dissolved | |
| SOUTHERN LP GAS, INC. | — | 402208 | 1981-08-31 | Merged | Gulfport |
| SOUTHERN LP GAS, INC. | — | 502342 | 1981-08-31 | Revoked | |
| SOUTHERN MARITIME ENTERPRISES, INC. | — | 402230 | 1981-05-18 | Dissolved | |
| SOUTHERN MARKETING SUPPORT, INC. | — | 502343 | 1981-12-31 | Dissolved | |
| SOUTHERN MISSISSIPPI OIL & GAS CORPORATION | — | 502346 | 1981-12-11 | Dissolved | |
| SOUTHERN MORTGAGE COMPANY | — | 402252 | 1981-02-16 | Revoked | JACKSON |
| SOUTHERN NEWSPRINT ENTERPRISES, INC. | — | 402268 | 1981-09-22 | | |
| SOUTHERN OILFIELD CONTRACTORS, INC. | — | 402275 | 1981-02-25 | Dissolved | |
| SOUTHERN PENSION CONSULTANTS, INC. | — | 402288 | 1981-07-01 | Dissolved | JACKSON |