| MEL FISHER'S TREASURES DUVAL, LLCKey West, FL · Active | Key West, FL | LLC | Mar 6, 2024 | Active |
| MEL FISHERS SHIPWRECK TREASURES, LLCKey West, FL · Active | Key West, FL | LLC | Jun 3, 2019 | Active |
| MEL FISHER LOYALTY REWARDS POINTS PROGRAM, LLCKey West, FL · Active | Key West, FL | LLC | Jul 26, 2017 | 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 |
| BLUE HOLE HOLDINGS, LLCKey West, FL · Active | Key West, FL | LLC | Aug 22, 2006 | 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 |
| MICHAEL ABT, JR. HAVE-A-HEART FOUNDATION, INC.Sebastian, FL · Active | Sebastian, FL | Nonprofit | May 9, 2006 | Active |
| TAFFI'S TREASURES, LLCSebastian, FL · Active | Sebastian, FL | LLC | Nov 3, 2005 | Active |
| CRYSTALS OF DELAWARE, INC.Key West, FL · Inactive | Key West, FL | Corporation | Nov 22, 1995 | Inactive |
| CRYSTALS RECOVERY, INC.Key West, FL · Active | Key West, FL | Corporation | Nov 22, 1995 | Active |
| MEL FISHER'S TREASURES DUVAL, LLCKey West, FL · Inactive | Key West, FL | LLC | Dec 15, 2003 | Inactive |
| MEL FISHER EXPEDITION - 2021, LLCKey West, FL · Inactive | Key West, FL | LLC | Dec 9, 2020 | Inactive |
| MEL FISHER DAYS, INC.Key West, FL · Active | Key West, FL | Nonprofit | May 14, 1997 | Active |
| FLORIDOESIT4ME, INC.Vero Beach, FL · Inactive | Vero Beach, FL | Corporation | Oct 31, 2014 | Inactive |
| 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 CENTER, INC.Sebastian, FL · Active | Sebastian, FL | Corporation | Nov 15, 1991 | Active |
| MEL FISHER, KING OF THE CONCH REPUBLIC, INC.Key West, FL · Inactive | Key West, FL | Corporation | Jul 20, 1995 | Inactive |
| SALVAGE MANAGEMENT COMPANY, INC.Key West, FL · Active | Key West, FL | Corporation | Dec 20, 1999 | Active |