| FLAKEYS, L.L.C.Marathon, FL · Inactive | Marathon, FL | LLC | Jul 6, 2015 | Inactive |
| LADY JOSEPHINE, INC.Marathon, FL · Active | Marathon, FL | Corporation | Nov 20, 2014 | Active |
| MARATHON SHORES, LLCMarathon, FL · Active | Marathon, FL | LLC | Jan 8, 2013 | Active |
| VACA CUT VACATIONS, INC.Marathon, FL · Active | Marathon, FL | Corporation | Jan 30, 2003 | Active |
| SHINING STAR CHARTERS, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jan 16, 2001 | Inactive |
| JAMES J. DORL, P.A.Marathon, FL · Active | Marathon, FL | Corporation | Jan 31, 1978 | Active |
| PROFESSIONAL BARS, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Nov 29, 1979 | Inactive |
| EDDOL OF MARATHON, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jun 26, 1980 | Inactive |
| MARATHON KEY BEACH CLUB II ASSOCIATION, INC.Marathon, FL · Active | Marathon, FL | Nonprofit | Nov 3, 1981 | Active |
| MARATHON RUNNERS CLUB, INC.Marathon, FL · Active | Marathon, FL | Nonprofit | Apr 26, 1982 | Active |
| B&L OF KCB, INC.Key Colony Beach, FL · Inactive | Key Colony Beach, FL | Corporation | Jul 28, 1982 | Inactive |
| MONGERSON FAMILY COOPERATIVE, L.L.C.Key Colony Beach, FL · Active | Key Colony Beach, FL | LLC | Mar 17, 2003 | Active |
| BOTTOM LINE, INC. OF THE KEYSMarathon, FL · Inactive | Marathon, FL | Corporation | Aug 23, 1989 | Inactive |
| MARATHON CHIROPRACTIC CENTRE, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Aug 8, 1988 | Inactive |
| MARATHON LIONS CLUB, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Jul 31, 2014 | Inactive |
| G & C WASHINGTON ENTERPRISES, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Mar 6, 2000 | Inactive |
| SEA KING DOCKS, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Oct 12, 2001 | Inactive |
| JOHN LIDDYS MOBILE MARINE, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Sep 26, 2002 | Inactive |
| R.D. PAINTING OF THE FLORIDA KEYS, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Oct 16, 2003 | Inactive |
| GONZALEZ BROTHERS LANDSCAPING, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Dec 4, 2003 | Inactive |
| BILL'S WELDING, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Apr 19, 2010 | Inactive |
| CAY CONDOMINIUM RENTALS, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Mar 22, 2017 | Inactive |
| MCNEAL PAINTING, INC.Ocala, FL · Inactive | Ocala, FL | Corporation | Nov 16, 1994 | Inactive |
| KEY WEST STEAMBOAT CO., INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Oct 7, 1999 | Inactive |