Transaction Details

Footnotes

Option granted to David Johnson ("Mr. Johnson") pursuant to the Exelixis, Inc. 2017 Equity Incentive Plan. The option is exercisable immediately, subject to repurchase provisions, and will vest as to 100% of the shares subject to the option on the first anniversary of the date of grant, subject to Mr. Johnson's continuous service through such date. | Mr. Johnson is deemed to hold the securities reported herein for the benefit of Caligan Partners Master Fund LP (the "Caligan Master Fund") and managed accounts to which Caligan Partners LP ("Caligan") serves as investment manager (the "Caligan Accounts", together with the Caligan Master Fund, the "Caligan Fund and Accounts"), and may, after vesting, if applicable, transfer the securities directly to the Caligan Fund and Accounts.