* 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. |
| 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 |
| Amrize Amrize | Andrie LLC Andrie LLC |
| 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 | 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. |
| Campbell Transportation Company, Inc. Campbell Transportation Company, Inc. | Canal Barge Company, Inc. Canal Barge Company, Inc. |
| Carline Management Company, Inc. Carline Management Company, Inc. | Cenac Marine Services, LLC Cenac Marine Services, LLC |
| Centerline Logistics Corporation Centerline Logistics Corporation | Central Boat Rentals, Inc. Central Boat Rentals, Inc. |
| 360 Coverage Pros Mariner Liability Insurance 360 Coverage Pros Mariner Liability Insurance | 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 |
| Arc Boats Arc Boats | Arthur J. Gallagher & Co. Arthur J. Gallagher & Co. |
| AST Reygar AST Reygar | Baker Marine Solutions Baker Marine Solutions |
| Bank of America Global Leasing Bank of America Global Leasing | Bergan Marine Systems Bergan Marine Systems |
| Big River Shipbuilders, Inc. Big River Shipbuilders, Inc. | Birdon America, Inc. Birdon America, Inc. |
| BlueTide Communications BlueTide Communications | Bollard Marine Consulting Bollard Marine Consulting |
| Bollinger Shipyards, LLC Bollinger Shipyards, LLC | BP Shipping (USA) BP Shipping (USA) |
| Brown Brothers Harriman & Co. Brown Brothers Harriman & Co. | Budwine Marine Budwine Marine |
| C & C Marine and Repair C & C Marine and Repair | Carter Machinery Carter Machinery |
| Caterpillar Inc. Caterpillar Inc. | Channel Shipyard Company, Inc. Channel Shipyard Company, Inc. |
| Chevron Shipping Company Chevron Shipping Company | Citgo Petroleum Corporation Citgo Petroleum Corporation |
| CleanHarbors CleanHarbors | Clowder Clowder |
| Collier Walsh Nakazawa LLP Collier Walsh Nakazawa LLP | Compass Maritime Compass Maritime |
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