X0306 4 2018-05-01 0 0001689813 Biohaven Pharmaceutical Holding Co Ltd. BHVN 0001704234 Doogan Declan C/O BIOHAVEN PHARMACEUTICALS 234 CHURCH STREET NEW HAVEN CT 06510 1 0 0 0 Stock Option (Right to Buy) 28.76 2018-05-01 4 A 0 18000 0.00 A 2028-04-30 Common Shares 18000 18000 D The shares subject to this stock option will vest in full on the earlier of (a) May 1, 2019 or (b) the date of the 2019 Annual Meeting of Shareholders, in each case subject to the Reporting Person's continuous service with the Issuer through such vesting date. /s/ Darren K. DeStefano, Attorney-in-Fact 2018-05-03