| A.P. ST. PHILIP, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Feb 10, 1961 | Inactive |
| ARTEX ENGINEERING CORPLocation not reported, FL · Inactive | Location not reported, FL | Corporation | Jan 21, 1963 | Inactive |
| LEONARDI TOWING CO.Tampa, FL · Inactive | Tampa, FL | Corporation | Jan 21, 1963 | Inactive |
| TAMPA BAY TOWING CO.Tampa, FL · Inactive | Tampa, FL | Corporation | Jan 21, 1963 | Inactive |
| ST. PHILIP COASTAL TOWING COMPANY, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Sep 16, 1966 | Inactive |
| ST. PHILIP TOWING COMPANY OF JACKSONVILLE, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Jan 27, 1967 | Inactive |
| ST. PHILIP TOWING & TRANSPORTATION COMPANYTampa, FL · Inactive | Tampa, FL | Corporation | Oct 2, 1970 | Inactive |
| MANATEE TUG & BARGE LINES, INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Mar 8, 1971 | Inactive |
| ST. PHILIP OFFSHORE TOWING CO., INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Aug 19, 1971 | Inactive |
| GULF COAST COMMUNICATIONS, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Apr 5, 1973 | Inactive |
| CONTINENTAL TOWING CORP.Tampa, FL · Inactive | Tampa, FL | Corporation | Oct 22, 1973 | Inactive |
| ST. PHILIP CHARTERING CORPORATIONTampa, FL · Inactive | Tampa, FL | Corporation | Apr 25, 1975 | Inactive |
| CENTRAL FLORIDA PHOSPHATE, INCORPORATEDTampa, FL · Inactive | Tampa, FL | Corporation | Oct 23, 1975 | Inactive |
| GULF COAST TRAWLERS CORP.Tampa, FL · Inactive | Tampa, FL | Corporation | Dec 17, 1975 | Inactive |
| AGGREGATE MINING CORPORATIONTampa, FL · Inactive | Tampa, FL | Corporation | Jul 6, 1977 | Inactive |
| HILLSBOROUGH SERVICE, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Sep 28, 1977 | Inactive |
| POLK SERVICE, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | May 24, 1978 | Inactive |
| FUCHASE, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Nov 26, 1979 | Inactive |
| ST. PHILIP MARINE SERVICES CORPORATIONTampa, FL · Inactive | Tampa, FL | Corporation | Jun 17, 1980 | Inactive |
| ST. PHILIP TOWING OF TAMPA, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Mar 16, 1982 | Inactive |
| EAST TAMPA DEVELOPMENT CO.Tampa, FL · Inactive | Tampa, FL | Corporation | Feb 22, 1983 | Inactive |