X0306 4/A 2016-02-01 2016-02-03 0 0001629137 Global Blood Therapeutics, Inc. GBT 0001650126 Choi Jung C/O GLOBAL BLOOD THERAPEUTICS, INC. 400 EAST JAMIE COURT, SUITE 101 SOUTH SAN FRANCISCO CA 94080 0 1 0 0 See Remarks Common Stock 2016-02-01 4 A 0 749 16.09 A 143606 D Common Stock 25000 I By Trust Shares acquired pursuant to the Issuer's 2015 Employee Stock Purchase Plan. These shares were erroneously reported as being directly owned in the reporting person's original Form 4. These shares are held by The 2005 William Park and Jung Choi Family Trust and are held in trust for the benefit of the reporting person's children. The reporting person and her spouse are co-trustees of the trust. Chief Business and Strategy Officer /s/ John Schembri, as Attorney-in-Fact 2016-03-14