X0306 4 2021-06-15 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 Common Stock 2021-06-15 4 A false 4000.00 0.00 A 6117.00 D Common Stock 2021-06-15 4 F false 1144.00 58.80 D 4973.00 D On March 25, 2020, the reporting person was granted Performance Stock Units (PSU) to acquire a total of 10,000 shares of common stock. The PSU vests upon the achievement of certain milestones, one of which was met on June 15, 2021, resulting in the vesting of the PSU as to 4,000 shares. Reflects beneficial ownership balance which includes 313 shares purchased on June 30, 2020 under the Sage Therapeutics, Inc. 2014 Employee Stock Purchase Plan (the "ESPP") and 48 ESPP shares purchased on December 31, 2020 under the ESPP. /s/ Jennifer Fitzpatrick, as Attorney-in-Fact for Anne Marie Cook 2021-06-17