X0306 5 2021-12-31 true 0 0 0001689813 Biohaven Pharmaceutical Holding Co Ltd. BHVN 0001704234 Doogan Declan C/O BIOHAVEN PHARMACEUTICALS, INC. 215 CHURCH STREET NEW HAVEN CT 06510 true false false false Common Shares 2021-03-08 5 G false 210000.00 0.00 D 610647.00 D Common Shares 2021-03-08 5 G false 140000.00 0.00 A 140000.00 I Declan Doogan Revocable Trust Common Shares 2021-03-08 5 G false 70000.00 0.00 A 70000.00 I Dorothy Doogan Revocable Trust Common Shares 2021-03-16 5 G false 60775.00 0.00 A 60775.00 I Dorothy Doogan 2020 Trust Common Shares 2021-03-16 5 G false 60775.00 0.00 D 9225.00 I Dorothy Doogan Revocable Trust Common Shares 2021-03-18 5 G false 139916.00 0.00 A 139916.00 I Declan Doogan 2021 Trust Common Shares 2021-03-18 5 G false 139916.00 0.00 D 84.00 I Declan Doogan Revocable Trust Common Shares 2021-03-22 5 G false 22315.00 0.00 D 38460.00 I Dorothy Doogan 2020 Trust Common Shares 2021-03-22 5 G false 22315.00 0.00 A 31540.00 I Dorothy Doogan Revocable Trust Common Shares 2021-03-24 5 G false 132901.00 0.00 D 7015.00 I Declan Doogan 2021 Trust Common Shares 2021-03-24 5 G false 132901.00 0.00 A 132985.00 I Declan Doogan Revocable Trust Common Shares 2021-05-18 5 G false 113912.00 0.00 D 496735.00 D Common Shares 2021-05-18 5 G false 113912.00 0.00 A 246897.00 I Declan Doogan Revocable Trust Common Shares 2021-05-18 5 G false 31540.00 0.00 A 278437.00 I Declan Doogan Revocable Trust Common Shares 2021-05-18 5 G false 20800.00 0.00 D 17660.00 I Dorothy Doogan 2020 Trust Common Shares 2021-05-18 5 G false 20800.00 0.00 A 52340.00 I Dorothy Doogan Revocable Trust Common Shares 2021-05-18 5 G false 31540.00 0.00 D 20800.00 I Dorothy Doogan Revocable Trust Common Shares 2021-05-21 5 I false 170000.00 0.00 D 108437.00 I Declan Doogan Revocable Trust Common Shares 2021-05-21 5 G false 20800.00 0.00 A 129237.00 I Declan Doogan Revocable Trust Common Shares 2021-05-21 5 I false 170000.00 0.00 A 187660.00 I Dorothy Doogan 2020 Trust Common Shares 2021-05-21 5 G false 20800.00 0.00 D 0.00 I Dorothy Doogan Revocable Trust Common Shares 2021-10-14 5 G false 7015.00 0.00 D 0.00 I Declan Doogan 2021 Trust Common Shares 2021-10-14 5 G false 7015.00 0.00 A 136252.00 I Declan Doogan Revocable Trust Common Shares 2021-10-14 5 G false 7342.00 0.00 D 180318.00 I Dorothy Doogan 2020 Trust Common Shares 2021-10-14 5 G false 7342.00 0.00 A 7342.00 I Dorothy Doogan Revocable Trust Common Shares 2021-11-22 5 G false 491260.00 0.00 D 5475.00 D Common Shares 2021-11-22 5 G false 491260.00 0.00 A 627512.00 I Declan Doogan Revocable Trust Common Shares 2021-11-30 5 G false 5475.00 0.00 D 0.00 D Common Shares 2021-11-30 5 G false 5475.00 0.00 A 632987.00 I Declan Doogan Revocable Trust Common Shares 676002.00 I By the Declan Doogan 2014 Trust /s/ Jim Engelhart, Attorney-in-Fact 2022-02-11