Kirby (KEX)

The marine transportation business is Kirby’s core segment and its main source of revenue. It operates towboats and tank barges across key US waterways, including the Mississippi River system, the Gulf Intracoastal Waterway, and coastal markets. This network makes Kirby an important logistics provider for refineries, chemical producers, and industrial customers that depend on waterborne transport as a cost-efficient alternative to rail or truck for large-volume liquid shipments.

Kirby also operates a distribution and services segment. This business supplies replacement parts, maintenance, and repair services for engines, transmissions, reduction gears, and power generation equipment used in marine, oil and gas, commercial, and industrial applications. The segment complements the transportation business by drawing on technical expertise in heavy-duty engines and mechanical systems, while also giving the company exposure to broader industrial activity.

Kirby’s distinguishing feature is its position in a specialized part of US infrastructure: moving liquid commodities safely and efficiently through domestic waterways. Its results are influenced by petrochemical production, refinery utilization, barge supply and demand, fuel and labor costs, and industrial service activity. The company is therefore closely tied to the health of North American energy, chemicals, and manufacturing supply chains.