X0508 4 2026-02-27 0001274494 FIRST SOLAR, INC. FSLR 0001645425 Bradley Alexander R. C/O FIRST SOLAR, INC. 4300 E CAMELBACK ROAD, SUITE 220 PHOENIX AZ 85018 1 Chief Financial Officer 0 Common Stock 2026-02-27 4 A 0 7065 0 A 43988 D Common Stock 2026-03-03 4 S 0 3194 195.93 D 40794 D Represents the acquisition of shares of common stock issued upon the vesting of the performance share units granted on March 6, 2023, which performance share unit awards vested over an approximately three-year performance period contingent upon the achievement of certain performance objectives. Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the performance share units. /s/ Jason E. Dymbort, attorney-in-fact 2026-03-03