0001699031 2024-06-21 2024-06-21 false 0001699031 --12-31 8-K 2024-06-21 GRAIL, Inc. DE 001-42045 86-3673636 1525 O’Brien Drive Menlo Park CA 94025 (833) 694-2553 false false false false Common Stock, par value $0.001 per share GRAL NASDAQ true false