Houston, Texas-based Phillips 66 (PSX) is a diversified energy manufacturing and logistics company. It operates through Midstream, Chemicals, Refining, and Marketing & Specialties segments. With a market cap of $55.2 billion, Phillips 66's operations span numerous countries across the Americas, Europe, and internationally. Companies worth$10 billion or more are generally described as “large-cap stocks.” PSX fits the bill perfectly. Given the company’s extensive operations, its valuation above this mark i ...