0001757499 2026-05-01 2026-05-01 true 0001757499 8-K/A 2026-05-01 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. DE 001-41488 82-5089826 401 Professional Drive Suite 260 Gaithersburg MD 20879 (240) 430-4212 false false false false Common Stock $0.00001 per share SHPH NASDAQ true false On May 7, 2026, Shuttle Pharmaceuticals Holdings, Inc. (the “Company”) filed a Current Report on Form 8-K (the “Original 8-K”) to report, among other things, that the Company completed (the “Closing”) its previously announced merger pursuant to an Agreement and Plan of Merger (the “Merger Agreement”), entered into on April 30, 2026 by and among the Company, Shuttle Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of the Company, and United Dogecoin Inc., a Delaware corporation (“UDC”).