X0306 4 2019-07-09 0 0001351288 GW PHARMACEUTICALS PLC GWPH 0001754125 Snyder Douglas B. SOVEREIGN HOUSE, VISION PARK, HISTON CAMBRIDGE X0 CB24 9BZ UNITED KINGDOM 0 1 0 0 Chief Legal Officer Ordinary Shares 2019-07-09 4 S 0 4968 14.42 D 82920 D The sales reported were effected pursuant to a Rule 10b-5 trading plan adopted by the Reporting Person on May 14, 2019. Represented by American Depositary Shares of the Issuer ("ADSs"). Each ADS represents twelve ordinary shares of the Issuer. The price reported in Column 4 is a price per ordinary share converted from price per ADS. Includes 56,376 and 26,544 ordinary shares underlying restricted stock units previously reported as stock options on the reporting person's Form 3 filed on October 1, 2018 and Form 4 filed on March 5, 2019, respectively. /s/ Douglas B. Snyder 2019-07-11