The Phillips 66 Company is an American multinational energy company headquartered in Westchase, Houston, Texas. Its name, dating back to 1927 as a trademark of the Phillips Petroleum Company, helped ground the newly reconfigured Phillips 66. The company today was formed ten years after Phillips merged with Conoco to form ConocoPhillips. The merged company spun off its refining, chemical, and retail assets (known as downstream operations in the oil industry) into a new company bearing the Phillips name. It began trading on the New York Stock Exchange on May 1, 2012, under the ticker PSX.