Hess has capitalized on its proven track record in the Gulf of Mexico with the successful start up of the Stampede field — one of the largest undeveloped fields in the Gulf. Hess is operator and has a 25 percent working interest in the field. Co-venture owners are Union Oil Co. of California, a subsidiary of Chevron Corp. (25%), Nexen Petroleum Offshore U.S.A. Inc., a wholly owned affiliate of CNOOC Limited (25%), and Equinor Gulf of Mexico LLC (25%). First oil was achieved in January 2018, with production to ramp up over the following 18 months.