| RMS OF THE KEYS, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jun 24, 1988 | Inactive |
| HOSEK INCORPORATEDMarathon, FL · Inactive | Marathon, FL | Corporation | Jul 8, 1988 | Inactive |
| A-ACTION AUTOMOTIVE, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jul 25, 1988 | Inactive |
| SANDY O SEAFOOD, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jul 25, 1988 | Inactive |
| KEYSCAPES, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jul 28, 1988 | Inactive |
| BIG "K" SEAFOOD FARMS, INC.Grassy Key, FL · Inactive | Grassy Key, FL | Corporation | Jul 29, 1988 | Inactive |
| PRECISION BODY SHAPERS, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Aug 11, 1988 | Inactive |
| DARESO IMPORT AND EXPORT, INCORPORATEDMarathon, FL · Inactive | Marathon, FL | Corporation | Sep 13, 1988 | Inactive |
| MARATHON ENVIRONMENTAL ASSOCIATION, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Sep 15, 2000 | Inactive |
| MARATHON JIU JITSU INCORPORATEDMarathon, FL · Inactive | Marathon, FL | Nonprofit | Dec 27, 2000 | Inactive |
| MARATHON BEACH COMMUNITY ASSOCIATION, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Mar 17, 2004 | Inactive |
| KEY VACA CONDOMINIUM ASSOCIATION, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Dec 6, 2005 | Inactive |
| FRIENDS OF THE DOLPHIN RESEARCH CENTER, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Oct 10, 2006 | Inactive |
| APOSTOLIC PENTECOSTAL CHURCH OF JESUS CHRIST, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Nonprofit | Feb 20, 1986 | Inactive |
| FISHERMEN'S HOSPITAL AUXILIARY, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Mar 12, 1990 | Inactive |
| ZONTA CLUB OF MARATHON, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Feb 19, 1991 | Inactive |
| VIXEN OWNERS ASSOCIATION INC.Location not reported, FL · Inactive | Location not reported, FL | Nonprofit | Mar 9, 1992 | Inactive |
| FRATERNAL ORDER OF POLICE, MARATHON LODGE #73, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Nov 18, 1992 | Inactive |
| MARATHON ATHLETIC CLUB, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Nov 19, 1992 | Inactive |
| MIDDLE KEYS MARINE ASSOCIATION, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Dec 17, 1993 | Inactive |
| TROPICAL TROUPE, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Jul 18, 1995 | Inactive |
| MARATHON ALUMNI ATHLETIC BOOSTER CLUB, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Oct 5, 1995 | Inactive |
| 1499-1503 SOMBRERO BLVD. CONDOMINIUM ASSOCIATION, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Apr 8, 1996 | Inactive |
| MIDDLE KEYS EXPERIMENTAL AIRCRAFT ASSOCIATION, EAA CHAPTER 1241, INCORPORATEDMarathon, FL · Active | Marathon, FL | Nonprofit | Oct 12, 1998 | Active |
| INSPIRING SOLES, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jan 27, 2000 | Inactive |
| E P H PAINTING, INC.Key Colony Beach, FL · Inactive | Key Colony Beach, FL | Corporation | Mar 3, 2000 | Inactive |
| SHERMAN MARINE, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Mar 8, 2000 | Inactive |
| MAMAJOE'S CYCLES & STUFF, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Aug 2, 2000 | Inactive |
| TROPICAL COTTAGES, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Aug 22, 2000 | Inactive |
| ATLANTIC FENCE OF MONROE COUNTY, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Aug 31, 2000 | Inactive |
| ROYAL AMERICAN ENTERPRISES INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Dec 30, 1983 | Inactive |
| KEYS WIPERS, PAPER & CHEMICAL SUPPLY CO.Key Colony Beach, FL · Inactive | Key Colony Beach, FL | Corporation | Mar 21, 2001 | Inactive |
| ZANGWILL GROUP, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jul 19, 2001 | Inactive |
| BNC IRIESHINE MARINE DETAILING, INC.Islamorada, FL · Inactive | Islamorada, FL | Corporation | Oct 23, 2001 | Inactive |
| BLUE SKY GRILL, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Nov 8, 2001 | Inactive |
| BOUNTY HUNTER OF MARATHON, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Dec 12, 2001 | Inactive |
| SILVER CUE, INC.Boca Raton, FL · Inactive | Boca Raton, FL | Corporation | Jan 16, 2002 | Inactive |
| BITE ME CHARTER OF MARATHON, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jan 29, 2002 | Inactive |
| CAPTAIN PIP'S KEY COLONY BEACH, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Feb 6, 2002 | Inactive |
| RISING-SUN HOME INSPECTIONS, INC.Jupiter, FL · Inactive | Jupiter, FL | Corporation | Feb 27, 2002 | Inactive |
| MARATHON CITIZENS FOR RESPONSIBLE GOVERNMENT, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Sep 4, 2002 | Inactive |
| SOUTH ATLANTIC CONSTRUCTION & REMODELING, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Nov 1, 2002 | Inactive |
| EDWARD C. CAREY, P.A.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Jul 23, 2003 | Inactive |
| TARA THOMAN-WOOD, P.A.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Jul 29, 2003 | Inactive |
| DRC MANAGEMENT AND CONSULTING, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Oct 22, 2003 | Inactive |
| JOHN PESOLA PAINTING, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Dec 15, 2003 | Inactive |
| T & M DELIVERY, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Jul 26, 2004 | Inactive |
| STAR CARPETS, INC.Youngstown, FL · Inactive | Youngstown, FL | Corporation | Oct 18, 2004 | Inactive |
| AMERICAN TRENCHER, INC.Ramrod Key, FL · Inactive | Ramrod Key, FL | Corporation | Oct 22, 2004 | Inactive |
| ADIOS CHARTERS OF MARATHON, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Sep 9, 2005 | Inactive |