HF Sinclair Corporation is an independent energy company based in Dallas, Texas. It specializes in refining crude oil into a range of transportation fuels and other petroleum products. The company produces high-value light products, including gasoline, diesel fuel, jet fuel, renewable diesel, and specialty lubricants.

Founded in 1934 as Navajo Refining Company, HF Sinclair has grown through several mergers and acquisitions, including the acquisition of Sinclair Oil Corporation in 2022. The company operates multiple refineries, including those in Wyoming and Washington, and has made strides in renewable fuel production by converting some facilities to focus on renewable energy.

HF Sinclair serves a diverse customer base, including consumers of transportation fuels and commercial clients needing jet fuel and diesel. Its legacy brands, particularly the recognizable Sinclair Oil dinosaur logo, highlight its long-standing presence in the energy sector. The company is committed to both traditional and renewable energy markets.