X0306 4 2019-01-10 0 0001689813 Biohaven Pharmaceutical Holding Co Ltd. BHVN 0001704251 Tilton John C/O BIOHAVEN PHARMACEUTICALS, INC. 234 CHURCH STREET NEW HAVEN CT 06510 0 1 0 0 Chief Commercial Officer Common Shares 2019-01-10 4 M 0 10500 9.29 A 10500 D Common Shares 2019-01-10 4 S 0 10500 37.67 D 0 D Common Shares 1614 I By JET Ventures LLC Employee Stock Option (Right to Buy) 9.29 2019-01-10 4 M 0 10500 0.00 D 2026-12-14 Common Shares 10500 10500 D The exercise and sales reported herein were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $37.08 - $37.90, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4. The shares underlying this option vested as to 25% of the shares on December 15, 2016, with the remainder vesting in 3 equal installments on the first, second and third anniversaries of the grant date, subject to the reporting person's continued service as of each applicable vesting date. /s/ Darren DeStefano, Attorney-in-Fact 2019-01-14