PSX vs WMB Comparison

Phillips 66 is an independent refiner that owns or holds interest in 10 refineries with a total crude throughput capacity of 1.9 million barrels per day, or mmb/d, at the end of 2025. The midstream segment comprises extensive transportation and NGL processing assets. It includes 70,000 miles of crude oil, refined petroleum product, NGL and natural gas pipeline systems, and a comprehensive set of refined petroleum product, NGL and crude oil terminals, gathering and processing plants and fractionation facilities and various other storage and loading facilities. Its CPChem chemical joint venture operates facilities primarily in the United States and the Middle East and produces olefins and polyolefins.

Williams operates the Transco pipeline, which connects the Gulf Coast to the Northeast United States. It has additional natural gas transmission pipelines connecting the Rockies to the Pacific Northwest and midcontinent. At the field level, it operates substantial gathering and processing assets in Appalachia and other basins. The company has also struck several power supply agreements.