Oil produced offshore has to get to market somehow, and that's where marine transportation company Teekay Offshore Partners comes in. It generates most of its revenue from its fleet of about 35 shuttle tankers, which are used to transport oil from offshore fields to onshore processing facilities. Teekay Offshore also owns conventional long-haul oil tankers and floating storage and offtake (FSO) units. Business from Norwegian oil and gas giant Statoil (formerly StatoilHydro) accounts for about 30% of the company's sales; Teekay Offshore's parent company, tanker operator Teekay Corporation, accounts for another 15%. Teekay Corporation controls a majority stake in Teekay Offshore and owns its general partner.