X0306 4 2021-12-31 false 0001689813 Biohaven Pharmaceutical Holding Co Ltd. BHVN 0001898799 Buten Matthew C/O BIOHAVEN PHARMACEUTICALS, INC. 215 CHURCH STREET NEW HAVEN CT 06510 false true false false Chief Financial Officer Common Shares 2021-12-31 4 M false 12500.00 0.00 A 12500.00 D Common Shares 2021-12-31 4 F false 6323.00 137.81 D 6177.00 D Restricted Share Unit Award 2021-12-31 4 M false 12500.00 D Common Shares 12500.00 37500.00 D No shares were sold - these shares were withheld by the issuer in connection with mandatory share settlement to satisfy tax withholding requirements in connection with the vesting of restricted share units. Each restricted share unit represents the contingent right to receive one common share of the issuer. The reporting person was granted 50,000 restricted share units on December 8, 2021. 12,500 of the restricted share units vested on December 8, 2021 and were subject to deferred settlement. The remainder vest in three equal installments on December 8, 2022, 2023 and 2024 subject to the reporting person's continued service with the issuer at each vesting date. Not applicable. /s/ George Clark, Attorney-in-Fact 2022-01-04