| GREENTECH GROUP SOLUTIONS, LLCDania Beach, FL · Active | Dania Beach, FL | LLC | Feb 5, 2009 | Active |
| CRUISING CASITAS LLCMarathon, FL · Active | Marathon, FL | LLC | Nov 9, 2023 | Active |
| 1000 68TH STREET INCMarathon, FL · Active | Marathon, FL | Corporation | Feb 25, 2022 | Active |
| 1509 HARBOR DRIVE 1 INCMarathon, FL · Inactive | Marathon, FL | Corporation | Mar 10, 2021 | Inactive |
| 1509 HARBOR DRIVE 3 INCMarathon, FL · Active | Marathon, FL | Corporation | Mar 10, 2021 | Active |
| SEADB, INC.Marathon, FL · Active | Marathon, FL | Corporation | Sep 28, 2020 | Active |
| ALL KEYS YAMAHA INCMarathon, FL · Active | Marathon, FL | Corporation | May 22, 2019 | Active |
| KEYS CYCLES, INC.Marathon, FL · Inactive | Marathon, FL | Corporation | Aug 23, 2010 | Inactive |
| EVERT BLUE INCPlantation, FL · Active | Plantation, FL | Corporation | Jun 19, 2023 | Active |
| ROYAL MANTA RAY INCPlantation, FL · Active | Plantation, FL | Corporation | Oct 8, 2021 | Active |
| SOMBRERO ISLE PROPERTY OWNERS ASSOCIATION, INC.Marathon, FL · Inactive | Marathon, FL | Nonprofit | Nov 14, 1979 | Inactive |
| CHARTER KAI LLCBig Pine Key, FL · Inactive | Big Pine Key, FL | LLC | Mar 20, 2018 | Inactive |
| CBD FL KEYS LLCMarathon, FL · Inactive | Marathon, FL | LLC | Apr 8, 2019 | Inactive |
| RED DRAGON CHARTERS LLCPanama City Beach, FL · Inactive | Panama City Beach, FL | LLC | Jul 14, 2020 | Inactive |
| SELEVEL LEASING, LLCMarathon, FL · Inactive | Marathon, FL | LLC | Mar 19, 2021 | Inactive |
| 1525 HARBOR LLCMarathon, FL · Inactive | Marathon, FL | LLC | Jul 9, 2021 | Inactive |
| BGS INTERNATIONAL INCFort Myers, FL · Inactive | Fort Myers, FL | Corporation | Oct 10, 2019 | Inactive |
| KEYS TIRES AND MAINTENANCE LLCMarathon, FL · Inactive | Marathon, FL | Corporation | Jul 14, 2020 | Inactive |
| KEYRIBBEAN ISLAND SERVICES INCMarathon, FL · Inactive | Marathon, FL | Corporation | Aug 27, 2020 | Inactive |
| PERDIGON WELDING AND FABRICATING INCMarathon, FL · Inactive | Marathon, FL | Corporation | Aug 28, 2020 | Inactive |
| M & E CRAFTY CREATIONS INCMarathon, FL · Inactive | Marathon, FL | Corporation | Aug 27, 2020 | Inactive |
| 9984 AVIATION BLVD INCMarathon, FL · Inactive | Marathon, FL | Corporation | Sep 18, 2020 | Inactive |
| BRIGHT HOME CLEANING SERVICES INCMarathon, FL · Inactive | Marathon, FL | Corporation | Mar 18, 2021 | Inactive |
| 1509 HARBOR DRIVE 2 INCMarathon, FL · Inactive | Marathon, FL | Corporation | Mar 23, 2021 | Inactive |
| ISLAND PIZZA COMPANY OF THE KEYS INCBig Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Jan 14, 2022 | Inactive |
| 249 PESCAYO INCMarathon, FL · Inactive | Marathon, FL | Corporation | Dec 7, 2022 | Inactive |
| KOKOMO CAY INCMarathon, FL · Inactive | Marathon, FL | Corporation | May 16, 2023 | Inactive |
| FLOIRDA KEYS FINEST CLEANING SERVICES INCMarathon, FL · Inactive | Marathon, FL | Corporation | Jan 16, 2024 | Inactive |
| TAKARA JAPANESE RESTAURANT, INC.Marathon, FL · Active | Marathon, FL | Corporation | Oct 4, 1993 | Active |
| TROPICAL AWNINGS & SHUTTERS, INC.Marathon, FL · Active | Marathon, FL | Corporation | Feb 3, 1992 | Active |