* Subsidiary organization
| 41 North Offshore, LLC 41 North Offshore, LLC | AEP River Transportation Division AEP River Transportation Division |
| Al Cenac Towing L.L.C. Al Cenac Towing L.L.C. | Alaska Marine Lines, Inc. Alaska Marine Lines, Inc. |
| Alexis Marine, LLC Alexis Marine, LLC | American Commercial Barge Line LLC American Commercial Barge Line LLC |
| American River Transportation Company American River Transportation Company | Amherst Madison, Inc. Amherst Madison, Inc. |
| AmNav Maritime Corporation AmNav Maritime Corporation | Andrie Inc. Andrie Inc. |
| Avalon Freight Services LLC Avalon Freight Services LLC | Balico Marine Services LLC Balico Marine Services LLC |
| Baton Rouge Harbor Service, Inc. Baton Rouge Harbor Service, Inc. | Bay-Houston Towing Company Bay-Houston Towing Company |
| Baydelta Maritime Baydelta Maritime | Bellaire Harbor Service, LLC Bellaire Harbor Service, LLC |
| Blaha Towing Company LLC Blaha Towing Company LLC | Blessey Marine Services, Inc. Blessey Marine Services, Inc. |
| Boone Towing, Inc. Boone Towing, Inc. | Borghese Lane LLC Borghese Lane LLC |
| Brennan Marine, Inc. Brennan Marine, Inc. | Brown Water Marine Service, Inc. Brown Water Marine Service, Inc. |
| Brusco Tug & Barge, Inc. Brusco Tug & Barge, Inc. | Buffalo Marine Service, Inc. Buffalo Marine Service, Inc. |
| C & B Marine C & B Marine | C & J Marine Services, Inc. C & J Marine Services, Inc. |
| Calumet River Fleeting, Inc. Calumet River Fleeting, Inc. | Campbell Transportation Company, Inc. Campbell Transportation Company, Inc. |
| Canal Barge Company, Inc. Canal Barge Company, Inc. | Carline Management Company, Inc. Carline Management Company, Inc. |
| 360 Coverage Pros Mariner Liability Insurance 360 Coverage Pros Mariner Liability Insurance | ABB Marine & Ports Inc. ABB Marine & Ports Inc. |
| AccuTrans, LLC AccuTrans, LLC | Acuity International Acuity International |
| Alliant Insurance Services, Inc. Alliant Insurance Services, Inc. | American Bureau of Shipping (ABS) American Bureau of Shipping (ABS) |
| American Steamship Owners Mutual P & I American Steamship Owners Mutual P & I | AON Risk Services AON Risk Services |
| ARCOSA Marine Products, Inc. ARCOSA Marine Products, Inc. | Arthur J. Gallagher & Co. Arthur J. Gallagher & Co. |
| Atlas Marine Services LLC (LA) Atlas Marine Services LLC (LA) | Bergan Marine Systems Bergan Marine Systems |
| Big River Shipbuilders, Inc. Big River Shipbuilders, Inc. | Bollinger Shipyards, LLC Bollinger Shipyards, LLC |
| BP Shipping (USA) BP Shipping (USA) | Brown Brothers Harriman & Co. Brown Brothers Harriman & Co. |
| C & C Marine Repair C & C Marine Repair | Cadence CR Marine Cadence CR Marine |
| Caterpillar Inc. Caterpillar Inc. | Center for Toxicology and Environmental Health, LLC Center for Toxicology and Environmental Health, LLC |
| Channel Shipyard Company, Inc. Channel Shipyard Company, Inc. | Chevron Shipping Company Chevron Shipping Company |
| Citgo Petroleum Corporation Citgo Petroleum Corporation | Conrad Shipyard, L.L.C. Conrad Shipyard, L.L.C. |
| Consolidated Grain & Barge, Inc. Consolidated Grain & Barge, Inc. | Cooper Consolidated, LLC Cooper Consolidated, LLC |
| Corvus Energy USA Corvus Energy USA | Cottrell Contracting Corporation Cottrell Contracting Corporation |
| Cummins Inc. Cummins Inc. | Current Data, LLC Current Data, LLC |
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