X0306 4 2017-08-01 0 0001629137 Global Blood Therapeutics, Inc. GBT 0001405253 Farrow Jeffrey S C/O GLOBAL BLOOD THERAPEUTICS, INC. 400 EAST JAMIE COURT, SUITE 101 SOUTH SAN FRANCISCO CA 94080 0 1 0 0 Chief Financial Officer Common Stock 2017-08-01 4 M 0 3062 A 3062 D Common Stock 2017-08-01 4 F 0 1151 25.10 D 1911 D Restricted Stock Units 2017-08-01 4 M 0 3062 0.00 D Common Stock 3062 21438 D Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of Issuer's Common Stock. Represents number of shares of Issuer's Common Stock withheld to satisfy the Reporting Person's tax obligations in connection with the vesting of 3,062 shares of Common Stock underlying the Reporting Person's RSUs. On January 17, 2017, the Reporting Person was granted 24,500 RSUs, which vest in equal semi-annual installments over 4 years from February 1, 2017, subject to the Reporting Person's continued employment with the Issuer through each vesting date. The RSUs are subject to accelerated vesting upon termination without cause or resignation for good reason after a change of control of the Issuer. Lesley Ann Calhoun, as Attorney-in-Fact 2017-08-03