Great Lakes Shipping Companies
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Algoma Central Corporation
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American Steamship Company
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Andrie, Inc.
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Armstrong Steamship Company (American Steamship Company)
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Bell Steamship Company (American Steamship Company)
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Canada Steamship Lines (division of CSL Group Inc.)
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Central Marine Logistics, Inc.
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Grand River Navigation Company, Inc.
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Great Lakes Fleet / Key Lakes, Inc.
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Groupe Desgagnés Inc.
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Inland Lakes Management, Inc.
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Interlake Steamship Company
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Lake Michigan Carferry Service
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Lakes Shipping Company, Inc. (The Interlake Steamship Company)
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Lower Lakes Towing Ltd.
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McAsphalt Marine Transportation Limited
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Pere Marquette Shipping Company
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Port City Marine Services, Inc.
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Port City Steamship Services, Inc.
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Provmar Fuels Inc.
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Soo Marine Supply, Inc.
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Upper Lakes Towing Company, Inc.
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VanEnkevort Tug and Barge, Inc.