Michael Thomas Heffernan - 03 Oct 2022 Form 4 Insider Report for Biohaven Pharmaceutical Holding Co Ltd.

Footnote F1

Under the Agreement and Plan of Merger, dated as of May 9, 2022 (the "Merger Agreement"), by and among the Issuer, Pfizer Inc. ("Pfizer") and a wholly owned subsidiary of Pfizer ("Merger Sub"), following satisfaction or waiver of the closing conditions set forth in the Merger Agreement, on October 3, 2022 Merger Sub merged with and into the Issuer with the Issuer surviving as the surviving company (the "Merger").

Footnote F2

In connection with the distribution ("Distribution") by the Issuer to holders of its common shares of all the outstanding common shares of Biohaven Ltd. ("SpinCo"), each outstanding restricted share unit of the Issuer was adjusted such that such restricted share unit became a restricted share unit in respect of common shares of SpinCo and a restricted share unit in respect of Common Shares (each such restricted share unit, a "Post-Spin Issuer RSU"). At the effective time of the Merger, each outstanding Post-Spin Issuer RSU was automatically cancelled in exchange for the right to receive (without interest) an amount in cash equal to the product of (i) the number of Common Shares subject to such Post-Spin Issuer RSU, with any performance conditions applicable to such Post-Spin Issuer RSU deemed achieved at 100%, and (ii) the Merger Consideration, less any withholding taxes.

Footnote F3

In connection with the Distribution, each outstanding option to purchase common shares of the Issuer was adjusted such that such option became an option to acquire SpinCo common shares and an option to acquire Common Shares (each such option, a "Post-Spin Issuer Option"). At the effective time of the Merger, each outstanding Post-Spin Issuer Option was automatically cancelled in exchange for the right to receive (without interest) an amount in cash equal to the product of (i) the excess, if any, of the Merger Consideration over the exercise price per Common Share of such Post-Spin Issuer Option and (ii) the number of Common Shares subject to such Post-Spin Issuer Option, less any withholding taxes.