| W.A. PARRISH, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 19, 1955 | Inactive |
| HANLEY PROPERTIES INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 25, 1955 | Inactive |
| HANLEY'S, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 25, 1955 | Inactive |
| B-A-R INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | May 27, 1955 | Inactive |
| MARADOCKS, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Sep 30, 1955 | Inactive |
| THE CITIZENS AND SOUTHERN BANK OF MONROE COUNTYMarathon, FL · Inactive | Marathon, FL | Corporation | Apr 3, 1956 | Inactive |
| MARATHON CAB CORPORATIONLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Jan 2, 1957 | Inactive |
| RUTTGERS INCMarathon, FL · Inactive | Marathon, FL | Corporation | Feb 1, 1957 | Inactive |
| MARYLAND HOLDING CO INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | May 25, 1957 | Inactive |
| KEY TRAILER COURT, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Oct 10, 1957 | Inactive |
| JOHN C. PUTO, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | May 1, 1958 | Inactive |
| J.T. PERRY CONSTRUCTION COMPANY OF FLORIDA, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Sep 10, 1958 | Inactive |
| HALL'S CAMP, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Feb 7, 1959 | Inactive |
| KINGSAIL CORPORATION OF MARATHONMarathon, FL · Inactive | Marathon, FL | Corporation | Jan 1, 1957 | Inactive |
| MARATHON GARBAGE SERVICE, INC.Marathon, FL · Active | Marathon, FL | Corporation | Jun 29, 1959 | Active |
| CROSLAND BAIT & FREEZER INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Dec 2, 1959 | Inactive |
| CAMERON CONSTRUCTION CO., INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jul 29, 1960 | Inactive |
| HENDERSON ELECTRIC, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Aug 16, 1961 | Inactive |
| KEYS BEACHCOMBERS INCMarathon, FL · Inactive | Marathon, FL | Corporation | Nov 6, 1961 | Inactive |
| MARATHON TRAILERAMA, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Feb 26, 1962 | Inactive |
| D.R. GAINES CONSTRUCTION, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 1, 1962 | Inactive |
| SALTY DOG INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Jul 5, 1962 | Inactive |
| MARATHON MILL AND SUPPLY, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Oct 9, 1962 | Inactive |
| J.S. SHUEY INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Mar 27, 1963 | Inactive |
| CITY FISH, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jun 20, 1963 | Inactive |
| FIA, FIA, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Dec 2, 1963 | Inactive |
| MALIHINI, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Dec 11, 1964 | Inactive |
| TOTAL SERVICE CORPORATION OF MONROE COUNTYMarathon, FL · Inactive | Marathon, FL | Corporation | Mar 4, 1965 | Inactive |
| BOOT KEY MARINA INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Jul 28, 1965 | Inactive |
| BUCCANEER LODGE CORPLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Sep 7, 1965 | Inactive |
| EQUITY INVESTMENT ENTERPRISES CORP.Marathon, FL · Inactive | Marathon, FL | Corporation | Sep 8, 1965 | Inactive |
| CORAL KEY VILLAGE INCMarathan, FL · Inactive | Marathan, FL | Corporation | Mar 25, 1966 | Inactive |
| BAY LAND INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | May 4, 1966 | Inactive |
| OLD ISLAND CANDLE MAKERS INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | May 5, 1966 | Inactive |
| LEE INTERIORS INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | May 17, 1966 | Inactive |
| BIO-MARINE RESEARCH, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Oct 27, 1966 | Inactive |
| WILLIAM B. BRADLEY, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jan 31, 1967 | Inactive |
| BOATS INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 10, 1967 | Inactive |
| THE KNOTICAL SHOP, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 13, 1967 | Inactive |
| KEYS FISHERIES, INC.Marathon, FL · Active | Marathon, FL | Corporation | Apr 17, 1967 | Active |
| STANLEY PRINTING, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jun 13, 1967 | Inactive |
| ROBINSON CRUSOE ADVENTURES, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jun 22, 1967 | Inactive |
| MARATHON GLASS AND SUPPLY INCMarathon, FL · Inactive | Marathon, FL | Corporation | Jun 22, 1967 | Inactive |
| ISLAND DISPOSAL CO., INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Aug 15, 1967 | Inactive |
| KEY COLONY EAST, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Sep 20, 1967 | Inactive |
| KEY COLONY BEACH MARINA, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Oct 27, 1967 | Inactive |
| KURTZ COMMERCIAL REAL ESTATE, INC.Marathon, FL · Active | Marathon, FL | Corporation | Nov 1, 1967 | Active |
| MARINE SPECIMENS UNLIMITED INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Dec 14, 1967 | Inactive |
| AMERICAN HYDROPHOTO INDUSTRIES INCMarathon, FL · Inactive | Marathon, FL | Corporation | Dec 28, 1967 | Inactive |
| FARO BLANCO HOLDING CO.Marathon, FL · Inactive | Marathon, FL | Corporation | Jan 15, 1968 | Inactive |