0001984086 2025-09-03 2025-09-03 0001984086 false 8-K 2025-09-03 SEPTERNA, INC. DE 001-42382 84-3891440 250 East Grand Avenue South San Francisco CA 94080 650 338-3533 false false false false Common Stock, $0.001 par value per share SEPN NASDAQ true false