X0306 5 2018-12-31 0 0 1 0001689813 Biohaven Pharmaceutical Holding Co Ltd. BHVN 0001262325 AGUIAR ERIC C/O AISLING CAPITAL LLC 888 SEVENTH AVENUE, 12TH FLOOR NEW YORK NY 10106 1 0 0 0 Stock Option (Right to Buy) 32.42 2018-11-20 4 A 0 L 30000 0.00 A 2028-11-19 Common Shares 30000 30000 I By Spouse The shares underlying this option vest in four equal installments on November 20, 2019, 2020, 2021 and 2022, subject to the reporting person's spouse continuous service with the issuer at each vesting date. This stock option is held by the reporting person's spouse as an employee of the issuer. /s/ Darren K. DeStefano, Attorney-in-Fact 2019-02-14