X0306 4/A 2017-12-07 2017-12-11 false 0001689813 Biohaven Pharmaceutical Holding Co Ltd. BHVN 0001704256 Conway Charles C/O BIOHAVEN PHARMACEUTICALS, INC. 215 CHURCH STREET NEW HAVEN CT 06510 false true false false Chief Scientific Officer Employee Stock Option (Right to Buy) 20.79 2017-12-07 4 A false 42612.00 0.00 A 2027-12-06 Common Shares 42612.00 42612.00 D On December 11, 2017, the reporting person filed a Form 4 which inadvertently reported that the reporting person was granted 32,612 Employee Stock Options on December 7, 2017. However, as reported in this amendment, the reporting person was actually granted 42,612 Employee Stock Options on such date. The shares underlying this option vest in four equal installments on December 7, 2018, 2019, 2020 and 2021, subject to the reporting person's continuous service with the issuer at each vesting date. /s/ Jim Engelhart, Attorney-in-Fact 2021-11-26