The share price of Delek US Holdings, Inc. (NYSE:DK) fell by 10.92% between September 5 and September 12, 2025, putting it among the Energy Stocks that Lost the Most This Week. Delek US Holdings (DK) Falls After a Strong Rally Delek US Holdings, Inc. (NYSE:DK) is a diversified downstream energy company specializing in petroleum refining, asphalt, renewable fuels, and logistics. Delek US Holdings, Inc. (NYSE:DK) rallied earlier this month after Wolfe Research upgraded the stock from ‘Peer Perform’ to ‘Ou ...