X0508 4 2024-08-05 false 0001597553 Sage Therapeutics, Inc. SAGE 0001320559 Cook Anne Marie C/O SAGE THERAPEUTICS, INC. 215 FIRST STREET CAMBRIDGE MA 02142 false true false false SVP, GC & Secretary false Common Stock 2024-08-05 4 A false 13500.00 0.00 A 28543.00 D Common Stock 2024-08-05 4 F false 4503.00 8.96 D 24040.00 D On February 13, 2024, the reporting person was granted Performance Stock Units (PSUs) to acquire a total of 33,750 shares of common stock. The PSUs vest upon the achievement of certain milestones, one of which was met on August 5, 2024, resulting in the vesting of the PSUs as to 13,500 shares. Reflects beneficial ownership balance which includes 1,112 shares purchased on June 28, 2024 under the Sage Therapeutics, Inc. 2014 Employee Stock Purchase Plan. Brandon Marsh, attorney in fact for COOK, ANNE MARIE 2024-08-07