| DESERT ROSE HOLDINGS, LLCKey West, FL · Active | Key West, FL | LLC | Sep 9, 2021 | Active |
| MEL FISHER ENTERPRISES, LLCKey West, FL · Active | Key West, FL | LLC | Mar 3, 2010 | Active |
| SOUTHERNMOST EXPEDITIONS, LLCKey West, FL · Active | Key West, FL | LLC | Mar 5, 2008 | Active |
| THE O/S "DARE", LLCKey West, FL · Active | Key West, FL | LLC | Aug 27, 2004 | Active |
| D & M ENTERPRISES, L.L.C.Key West, FL · Active | Key West, FL | LLC | Apr 10, 2001 | Active |
| MEL FISHER'S TREASURES, LLCKey West, FL · Active | Key West, FL | LLC | Jul 7, 2000 | Active |
| CRYSTALS RECOVERY, INC.Key West, FL · Active | Key West, FL | Corporation | Nov 22, 1995 | Active |
| MEL'S TREASURES ON-LINE, LLCKey West, FL · Inactive | Key West, FL | LLC | Feb 15, 2000 | Inactive |
| MEL FISHER'S TREASURES DUVAL, LLCKey West, FL · Inactive | Key West, FL | LLC | Dec 15, 2003 | Inactive |
| ATOCHA TREASURE ADVENTURES, LLCKey West, FL · Inactive | Key West, FL | LLC | Feb 23, 2009 | Inactive |
| LOST MERCHANT, LLCKey West, FL · Inactive | Key West, FL | LLC | Mar 3, 2010 | Inactive |
| HORTON & SONS, LLCLocation not reported, FL · Active | Location not reported, FL | LLC | Feb 17, 2012 | Active |
| MEL FISHER'S TREASURES EXHIBITS & SALES, LLCKey West, FL · Inactive | Key West, FL | LLC | Aug 5, 2020 | Inactive |
| 613 DUVAL, LLCKey West, FL · Inactive | Key West, FL | LLC | Mar 9, 2021 | Inactive |
| 1122 WATSON, LLCKey West, FL · Inactive | Key West, FL | LLC | Mar 9, 2021 | Inactive |
| 1322 US1, LLCKey West, FL · Inactive | Key West, FL | LLC | Mar 9, 2021 | Inactive |
| ORMAND CT, LLCKey West, FL · Inactive | Key West, FL | LLC | Mar 9, 2021 | Inactive |
| ATOCHA SITE TOURS, L.C.Key West, FL · Inactive | Key West, FL | LLC | Jun 21, 1999 | Inactive |
| MEL FISHER DAYS, INC.Key West, FL · Active | Key West, FL | Nonprofit | May 14, 1997 | Active |
| KEY WEST TREASURE EXHIBIT, INC.Key West, FL · Active | Key West, FL | Corporation | Jun 12, 1987 | Active |
| MOTIVATION, INC.Key West, FL · Active | Key West, FL | Corporation | Aug 26, 1987 | Active |
| MEL FISHER, KING OF THE CONCH REPUBLIC, INC.Key West, FL · Inactive | Key West, FL | Corporation | Jul 20, 1995 | Inactive |
| MEL FISHER TREASURE EXHIBIT, INC.Key West, FL · Inactive | Key West, FL | Corporation | Jun 14, 1999 | Inactive |
| SALVAGE MANAGEMENT COMPANY, INC.Key West, FL · Active | Key West, FL | Corporation | Dec 20, 1999 | Active |
| PLATA WAREHOUSE INC.Key West, FL · Inactive | Key West, FL | Corporation | Sep 11, 1992 | Inactive |