| MISSISSIPPI ROAD BORING, INC. | — | 440072 | 1968-01-15 | | |
| MISSISSIPPI SAFETY EQUIPMENT AND ACCESSORIES, INCORPORATED | — | 440082 | 1968-06-05 | | |
| MISSISSIPPI SALT WATER CONSERVATION ASSOCIATION, INC. | — | 440087 | 1968-11-05 | | MISSISSIPPI STATE |
| MISSISSIPPI SCHOOL OF AVIATION, INC. | — | 508803 | 1968-11-01 | Dissolved | |
| MISSISSIPPI SCHOOL OF AVIATION, INCORPORATED | — | 104389 | 1968-11-01 | | |
| MISSISSIPPI SECURITIES DEALERS ASSOCIATION | — | 104398 | 1968-05-13 | | |
| MISSISSIPPI SOCIETY FOR THE PREVENTION OF BLINDNESS, AN AFFILIATE OF THE NATIONAL SOCIETY FOR THE PREVENTION OF | — | 440119 | 1968-02-27 | | |
| MISSISSIPPI SOCIETY OF MEDICAL ASSISTANTS, INC. | — | 522755 | 1968-09-04 | Active | GULFPORT |
| MISSISSIPPI TALENT ASSOCIATION, INC. | — | 104520 | 1968-06-14 | Active | JACKSON |
| MISSISSIPPI TRANSMISSION COMPANY, INC. | — | 440210 | 1968-02-16 | Merged | |
| MISSISSIPPI WOOD, INCORPORATED | — | 206113 | 1968-01-02 | Dissolved | KOSCIUSKO |
| MITCHELL DENNIS, INCORPORATED | — | 440376 | 1968-04-17 | Dissolved | |
| MITCHENER GIN, INCORPORATED | — | 206212 | 1968-03-04 | Dissolved | SUMNER |
| MIZE COAT MANUFACTURING COMPANY, INC. | — | 206224 | 1968-12-30 | Dissolved | |
| MOBILE FARM SUPPLY, INC. | Wholesale trade | 206248 | 1968-02-28 | Active | Clarksdale |
| MOBILE SALES & SERVICES, INC. | — | 440489 | 1968-07-12 | Dissolved | |
| MODEL HOMES OF PASCAGOULA, INC. | — | 440512 | 1968-03-14 | Dissolved | |
| MODERN BUILDERS, INC. | — | 440528 | 1968-02-26 | Dissolved | |
| MODERN ENTERPRISES, INC. | — | 440543 | 1968-02-05 | Dissolved | |
| MODERN INDUSTRIES, INC. | — | 440562 | 1968-01-05 | Revoked | MOBILE |
| MODERN MEN'S CLUB OF HANCOCK COUNTY, MISSISSIPPI | — | 206303 | 1968-03-05 | | WAVELAND |
| MODERN PRODUCTS AND SERVICE COMPANY | — | 440577 | 1968-06-24 | Dissolved | |
| MONEY MART, INC. OF BELZONI, MISS. | — | 206358 | 1968-12-03 | Dissolved | |
| MONEY MART, INC. OF CLARKSDALE, MISS. | — | 206359 | 1968-12-03 | Dissolved | |
| MONEY MART, INC. OF COLUMBIA, MISS. | — | 206360 | 1968-12-03 | Dissolved | |
| MONEY MART, INC. OF HATTIESBURG | — | 206363 | 1968-10-02 | Dissolved | |
| MONEY MART, INC. OF LUCEDALE, MISS. | — | 206364 | 1968-12-03 | Dissolved | |
| MONEY MART, INC. OF MENDENHALL, MISS. | — | 206365 | 1968-12-03 | Dissolved | |
| MONEY MART, INC., OF BELZONI, MISSISSIPPI | — | 440649 | 1968-12-03 | | |
| MONEY MART, INC., OF CLARKSDALE, MISSISSIPPI | — | 440650 | 1968-12-03 | | |
| MONEY MART, INC., OF COLUMBIA, MISSISSIPPI | — | 440651 | 1968-12-03 | | |
| MONEY MART, INC., OF GREENWOOD, MISS. | — | 206362 | 1968-12-03 | Dissolved | |
| MONEY MART, INC., OF GREENWOOD, MISSISSIPPI | — | 440652 | 1968-12-03 | | |
| MONEY MART, INC., OF LUCEDALE, MISSISSIPPI | — | 440653 | 1968-12-03 | | |
| MONEY MART, INC., OF MENDENHALL, MISSISSIPPI | — | 440654 | 1968-12-03 | | |
| MONROE CONTRACTORS, INC. | — | 206388 | 1968-03-04 | Dissolved | |
| MONROE COUNTY DEVELOPMENT COMPANY, INC. | — | 440672 | 1968-05-21 | Dissolved | |
| MONROE COUNTY FARM SERVICE COMPANY (AAL) | — | 440675 | 1968-06-27 | Dissolved | |
| MONROE COUNTY MEDIC-CENTER, INC. | — | 206407 | 1968-11-14 | Dissolved | |
| MONROE EDUCATIONAL FOUNDATION, INC. | — | 206414 | 1968-10-10 | | |
| MONROE INSURANCE, INC. | — | 328810 | 1968-03-04 | Dissolved | |
| MONTGOMER CONSERVATION & HUNTING CLUB, INC. | — | 206451 | 1968-11-27 | Active | PORT GIBSON |
| MONTGOMERY ENGINEERING, INC. | — | 328847 | 1968-10-15 | Dissolved | |
| MONTGOMERY WARD & CO., INCORPORATED | — | 206476 | 1968-10-11 | | Madison |
| MONTGOMERY, VESTAL & VERNON, INC. | — | 328855 | 1968-02-02 | Dissolved | |
| MOORE FLYING SERVICE, INC. | — | 328917 | 1968-05-16 | Dissolved | |
| MOORE-HANDLEY, INCORPORATED | — | 206525 | 1968-05-29 | | Madison |
| MOR-SAL, INC. | — | 328972 | 1968-08-14 | Dissolved | |
| MORGAN AND UNDERWOOD, INC. | — | 329041 | 1968-10-18 | Dissolved | |
| MORRIS WATER ASSOCIATION | — | 209310 | 1968-05-15 | Active | Mize |