X0306 4 2019-02-25 0001274494 FIRST SOLAR, INC. FSLR 0001647261 Bueter Christopher C/O FIRST SOLAR, INC. 350 WEST WASHINGTON STREET, SUITE 600 TEMPE AZ 85281-1244 1 EVP, Human Resources Common Stock 2019-02-25 4 A 0 27581 0 A 33389 D Common Stock 2019-02-25 4 F 0 12316 53.73 D 21073 D Represents the acquisition of shares of common stock issued upon the vesting of the performance share units granted as a stub-year grant on March 7, 2017, which performance share unit awards were subject to vesting over an approximately two-year performance period contingent upon the achievement of certain performance objectives. Represents shares of common stock withheld by the issuer to satisfy certain tax withholding obligations with the vesting of the performance share units. /s/ Jason E. Dymbort, attorney-in-fact 2019-02-25