| BR POOL SERVICE LLCKey Largo, FL · Active | Key Largo, FL | LLC | Jul 6, 2017 | Active |
| MILE MARKER POOL STORE LLCMarathon, FL · Active | Marathon, FL | LLC | Oct 27, 2025 | Active |
| FOUR CONCHS LLCMarathon, FL · Active | Marathon, FL | LLC | Sep 3, 2025 | Active |
| CRACKED CONCH CAFE INCMarathon, FL · Active | Marathon, FL | Corporation | Dec 22, 2023 | Active |
| BLIND FACTORY LLCMarathon, FL · Active | Marathon, FL | LLC | Nov 4, 2024 | Active |
| 499 50TH STREET OCEAN LLCMarathon, FL · Active | Marathon, FL | LLC | Sep 23, 2024 | Active |
| IRIE ISLAND MARKET LLCMarathon, FL · Active | Marathon, FL | LLC | Jun 29, 2023 | Active |
| OVERSEAS BOAT RENTAL GROUP LLCMarathon, FL · Inactive | Marathon, FL | LLC | Apr 10, 2023 | Inactive |
| MILE MARKER POOL SERVICE LLCMarathon, FL · Active | Marathon, FL | LLC | Jan 5, 2023 | Active |
| PARADISE PEST CONTROL OF THE FLORIDA KEYS LLCMarathon, FL · Active | Marathon, FL | LLC | Dec 22, 2021 | Active |
| READY AND ABEL MOBILE DETAILING LLCMarathon, FL · Active | Marathon, FL | LLC | Aug 3, 2018 | Active |
| DEEP BLUE MARINE LLCMarathon, FL · Active | Marathon, FL | LLC | May 7, 2018 | Active |
| IRIE ISLAND EATS LLCMarathon, FL · Active | Marathon, FL | LLC | Jul 28, 2016 | Active |
| ODALYS FISHERIES, LLCMarathon, FL · Active | Marathon, FL | LLC | Jul 13, 2012 | Active |
| A DEEP BLUE DIVE CENTER CORPORATIONMarathon, FL · Inactive | Marathon, FL | Corporation | Sep 3, 2003 | Inactive |
| THE DOERFELS LLCBig Pine Key, FL · Inactive | Big Pine Key, FL | LLC | May 22, 2014 | Inactive |
| SUPP LA MENTAL LLCMarathon, FL · Inactive | Marathon, FL | LLC | Dec 16, 2014 | Inactive |
| THOMAS DOERFEL LLCBig Pine Key, FL · Inactive | Big Pine Key, FL | LLC | Jul 18, 2017 | Inactive |
| MILE MARKER BOOKKEEPING LLCMarathon, FL · Inactive | Marathon, FL | LLC | Jan 7, 2019 | Inactive |
| FLORIDA KEYS WINDOWS & SHUTTERS LLCMarathon, FL · Inactive | Marathon, FL | LLC | Apr 29, 2019 | Inactive |
| FOSTER MOBILE MARINE REPAIRS LLCMarathon, FL · Inactive | Marathon, FL | LLC | Jan 27, 2020 | Inactive |
| TWO FINGERS SOLUTIONS LLCMarathon, FL · Inactive | Marathon, FL | LLC | Aug 19, 2020 | Inactive |
| UNDER THE SUN LLCKey Colony Beach, FL · Inactive | Key Colony Beach, FL | LLC | Aug 21, 2020 | Inactive |
| MIDDLE KEYS HOME SERVICES LLCMarathon, FL · Inactive | Marathon, FL | LLC | Mar 13, 2024 | Inactive |
| G-STRING MAFIA LLCMarathon, FL · Inactive | Marathon, FL | LLC | Mar 15, 2024 | Inactive |
| ADONAI CMD LLCMarathon, FL · Inactive | Marathon, FL | LLC | Jul 2, 2024 | Inactive |
| GRILL CONSTRUCTION, INC.Duck Key, FL · Active | Duck Key, FL | Corporation | May 14, 1990 | Active |
| TRAILER RANCH BY THE SEA, INC.Marathon, FL · Active | Marathon, FL | Corporation | Apr 2, 1998 | Active |