| SCIENTIFIC REALTY CORPLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Jan 29, 1968 | Inactive |
| CORAL LAGOON RESORT, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Mar 13, 1968 | Inactive |
| HOLDING ELECTRIC, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Apr 10, 1968 | Inactive |
| S AND S CABINET AND STORE FIXTURES AND WELDING, INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | May 3, 1968 | Inactive |
| DUNN MARINE INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | May 27, 1968 | Inactive |
| UNDERWATER PHOTOGRAPHIC SCIENTIFIC INVENTIONS, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | May 31, 1968 | Inactive |
| SHANNON NURSERY INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Jul 1, 1968 | Inactive |
| MERCIER CONSTRUCTION COMPANYLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Jul 12, 1968 | Inactive |
| MARATHON ROCK AND CONSTRUCTION CO INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Aug 1, 1968 | Inactive |
| SLATER INVESTMENTS INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Sep 20, 1968 | Inactive |
| CUNNINGHAM PROPERTIES, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Oct 3, 1968 | Inactive |
| TRANDEL'S SOUTH SEAS, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Oct 31, 1968 | Inactive |
| QUALLS BROTHERS INCMarathon, FL · Active | Marathon, FL | Corporation | Oct 31, 1968 | Active |
| INDIES PROPERTIES, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jan 31, 1969 | Inactive |
| NDA ENTERPRISES, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 10, 1969 | Inactive |
| CASE'S SISTER'S CREEK, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Mar 25, 1969 | Inactive |
| BEACH APPLIANCE CENTER, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 2, 1969 | Inactive |
| VINCENT AUTO PARTS INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 23, 1969 | Inactive |
| ISLAND AVIATION DEVELOPMENT CORP.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jul 15, 1969 | Inactive |
| JOBROOK CONSTRUCTION INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Jul 23, 1969 | Inactive |
| DUCK KEY MARINA, INC.Duck Key, FL · Inactive | Duck Key, FL | Corporation | Oct 9, 1969 | Inactive |
| MARATHON CONSTRUCTION CORPLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Nov 24, 1969 | Inactive |
| BONEFISH HARBOR MARINA, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Dec 4, 1969 | Inactive |
| TOLL GATE INN, INCORPORATEDLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Dec 3, 1969 | Inactive |
| NOME SEILER'S, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Dec 23, 1969 | Inactive |
| FRY AND CHRISTMAS CONSTRUCTION COMPANY, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jan 13, 1970 | Inactive |
| BLACK & WALDORF, INC.Marathon, FL · Active | Marathon, FL | Corporation | Feb 5, 1970 | Active |
| S & S CABINETS & BUILDING SUPPLIES INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Feb 23, 1970 | Inactive |
| CONSOLATO DEL MARE INCLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 9, 1970 | Inactive |
| SANTINI'S PORPOISE TRAINING SCHOOL, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jun 25, 1970 | Inactive |
| LARRY AND TERRI INCMarathon, FL · Inactive | Marathon, FL | Corporation | Jun 26, 1970 | Inactive |
| OVERSEAS BOAT RENTAL, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jul 8, 1970 | Inactive |
| PASCAGOULA RESTAURANT CORP.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Aug 13, 1970 | Inactive |
| FLORIDA KEYS DEVELOPMENT CO., INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Aug 17, 1970 | Inactive |
| BEHRENS REALTY COMPANY, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Oct 1, 1970 | Inactive |
| WASHGO, INC.Marathon Shores, FL · Inactive | Marathon Shores, FL | Corporation | Oct 5, 1970 | Inactive |
| MARATHON KWIK PRINT, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Oct 12, 1970 | Inactive |
| MARATHON PREFAB, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Oct 16, 1970 | Inactive |
| THE FON CORP.Marathon, FL · Inactive | Marathon, FL | Corporation | Oct 20, 1970 | Inactive |
| MID-KEYS LUMBER, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Nov 18, 1970 | Inactive |
| CORAL REEF FAMILY BILLIARDS CENTER, INC.Homestead, FL · Inactive | Homestead, FL | Corporation | Nov 23, 1970 | Inactive |
| MARATHON TRANSPORT CO., INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Dec 1, 1970 | Inactive |
| THIEMANN CONSTRUCTION CO.Marathon, FL · Inactive | Marathon, FL | Corporation | Dec 16, 1970 | Inactive |
| FLORIDA KEYS INSULATORS, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Feb 22, 1971 | Inactive |
| EUROPE BY RAIL, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 2, 1971 | Inactive |
| MARATHON AIR CHARTER, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 12, 1971 | Inactive |
| B.E.C.K. INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Apr 12, 1971 | Inactive |
| J. D. R., INCMarathon, FL · Inactive | Marathon, FL | Corporation | Apr 14, 1971 | Inactive |
| BIG "J" SERVICES, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jun 4, 1971 | Inactive |
| B M G, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jun 8, 1971 | Inactive |