0000728387 2026-05-21 2026-05-21 false 0000728387 8-K 2026-05-21 Perspective Therapeutics, Inc. DE 001-33407 41-1458152 c/o Perspective Therapeutics, Inc. 2401 Elliott Avenue Suite 320 Seattle WA 98121 (206) 676-0900 false false false false Common Stock, $0.001 par value CATX NYSEAMER false