Delek US Holdings, Inc. engages in the integrated downstream energy business in the United States. The company operates through three segments: Refining, Logistics, and Retail.

CVR Energy, Inc., together with its subsidiaries, engages in the petroleum refining and nitrogen fertilizer manufacturing activities in the United States.

Valero Energy Corporation manufactures, markets, and sells transportation fuels and petrochemical products in the United States, Canada, the United Kingdom, Ireland, and internationally.

Marathon Petroleum Corporation, together with its subsidiaries, operates as an integrated downstream energy company primarily in the United States. It operates in two segments, Refining & Marketing, and Midstream.

Delek Logistics Partners, LP owns and operates logistics and marketing assets for crude oil, and intermediate and refined products in the United States.

HF Sinclair Corporation operates as an independent energy company. It produces and markets gasoline, diesel fuel, jet fuel, renewable diesel, specialty lubricant products, specialty chemicals, specialty and modified asphalt, and others.

Par Pacific Holdings, Inc. owns and operates energy and infrastructure businesses. The company operates through three segments: Refining, Retail, and Logistics.

Phillips 66 operates as an energy manufacturing and logistics company. It operates through four segments: Midstream, Chemicals, Refining, and Marketing and Specialties (M&S).

Sunoco LP, together with its subsidiaries, distributes and retails motor fuels in the United States. It operates in two segments, Fuel Distribution and Marketing, and All Other.