Mario Tama Phillips 66 (NYSE:PSX) is an American multinational energy company headquartered in Houston. The company is one of the largest publicly traded refining companies, with a market cap just under $60 billion. As we'll see throughout this article, the company's impressive and complex assets will drive long-term shareholder returns. Phillips 66 Shareholder Commitments Phillips 66 is working to continue improving the reliability of its business with its commitments to shareholders. Phillips 66 Investor ...