Delek US Holdings, Inc.

Delek US Holdings is a diversified downstream energy company whose core business is petroleum refining and logistics. The company operates three refineries in Texas and Arkansas with a combined crude oil throughput capacity of approximately 302,000 barrels per day, processing crude oil into gasoline, diesel, jet fuel, and asphalt. Its operations are integrated with logistics assets, including pipelines, terminals, and storage facilities, primarily through its ownership in Delek Logistics Partners, LP.

The company’s financial results and strategic communications consistently center on its refining operations. In its 2025 annual report, Delek US reported a significant financial rebound driven by refining margins, underscoring the segment's centrality to its revenue. While the company has announced investments in renewable fuels, its primary capital allocation and operational focus remain on its conventional petroleum refining assets.

Delek US Holdings operates petroleum refineries in Texas, Tennessee, and Arkansas. Its operations have resulted in significant environmental penalties and documented regulatory failures. In August 2019, Delek settled with the U.S. Department of Justice and the Arkansas Department of Environmental Quality, agreeing to pay $1.7 million in federal civil penalties for Clean Water Act violations and an additional $550,000 to the state. An Occupational Safety and Health Review Commission judge separately affirmed citations against Delek Refining, finding sixteen unaddressed items from process hazard analyses and ten unresolved items from a compliance audit, indicating systemic operational safety and environmental control failures.

The company’s environmental liabilities extend to its supply chain and operational byproducts. In 2025, Delek filed a lawsuit against suppliers Marex Group and BTX Energy, alleging that contaminated crude oil caused substantial damage to its refinery. Furthermore, the refining process itself generates significant toxic waste; while scrubbers reduce sulfur air emissions, they produce billions of gallons of warm, acidic, and toxic wastewater. Delek’s record of penalties, operational hazards, and the toxic byproducts of its core business demonstrates a pattern of environmental harm.