| CATUG CORPORATIONFort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Nov 9, 1973 | Inactive |
| HVIDE MARINE, INCORPORATEDFort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Jan 27, 1977 | Inactive |
| SEABULK TRANSMARINE III, INC.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Apr 28, 1978 | Inactive |
| SEABULK TRANSMARINE I, INC.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Apr 28, 1978 | Inactive |
| PORT CANAVERAL TOWING, INC.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Sep 15, 1978 | Inactive |
| GREY PROPERTIES, INC.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Feb 20, 1980 | Inactive |
| SEABULK CARIBBEAN, LIMITEDFort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Partnership | Mar 24, 1982 | Inactive |
| HVIDE CHARTERING, LTD.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Partnership | Dec 10, 1985 | Inactive |
| HVIDE LEASING PARTNERSHIP, LTD.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Partnership | Feb 10, 1988 | Inactive |
| HLP II, LTD.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Partnership | Oct 17, 1989 | Inactive |
| HVIDE OFFSHORE SERVICES, LTD.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Partnership | May 28, 1993 | Inactive |
| M & S MARINE, INC.Wilton Manors, FL · Inactive | Wilton Manors, FL | Corporation | Apr 22, 1983 | Inactive |
| CANAVERAL TOWING AND SALVAGE, INC.Wilton Manors, FL · Inactive | Wilton Manors, FL | Corporation | Apr 22, 1983 | Inactive |
| AMERICAN TANK TESTING SERVICE, INC.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | May 12, 1986 | Inactive |
| AMERICAN TANK TESTING SERVICE OF NEW YORK, INC.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | May 6, 1987 | Inactive |
| HVIDE LEASING CORPORATIONFort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Dec 16, 1987 | Inactive |
| SEATEC INDUSTRIES, INCORPORATEDFort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Jun 21, 1988 | Inactive |
| HVIDE VAN OMMEREN TANKERS OPTIONS LLCFort Lauderdale, FL · Inactive | Fort Lauderdale, FL | LLC | May 15, 1997 | Inactive |
| TRIBECO, INC.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Jun 23, 1994 | Inactive |
| SEABULK MARINE GROUP, INC.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Dec 27, 1990 | Inactive |
| HVIDE MARITIME CONSULTANTS, INC.Fort Lauderdale, FL · Inactive | Fort Lauderdale, FL | Corporation | Feb 26, 1991 | Inactive |