DK DELEK US HOLDINGS INC Capital Structure Changes 8-K Filing 2024 - Share Buyback Increase Delek US Holdings, Inc. announced a $400 million increase in its share repurchase authorization, totaling approximately $562 million available for repurchases. Additionally, management will use new investor presentation materials starting September 3, 2024.Get access to all SEC 8-K filings of the DELEK US HOLDINGS INC