* Subsidiary organization
| 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 |
| B & G Towing, LLC/Yawl Marine LLC B & G Towing, LLC/Yawl Marine LLC | Balico Marine Services LLC Balico Marine Services LLC |
| Basin Fleeting, Inc. Basin Fleeting, Inc. | 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 | Bouchard Transportation Co., Inc. Bouchard Transportation Co., Inc. |
| Bren Transportation Corp. Bren Transportation Corp. | 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. | Callais & Sons, LLC Callais & Sons, LLC |
| ABB Marine & Ports Inc. ABB Marine & Ports Inc. | AccuTrans, LLC AccuTrans, LLC |
| 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) | Barge Transfer Services Barge Transfer Services |
| 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. |
| BXS Insurance BXS Insurance | C & C Marine Repair C & C Marine Repair |
| 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 | ClassNK ClassNK |
| 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. |
| Delphi Maritime, LLC Delphi Maritime, LLC | Durham and Bates Agencies, Inc. Durham and Bates Agencies, Inc. |
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