X0306 4 2021-08-02 0001274494 FIRST SOLAR, INC. FSLR 0001645425 Bradley Alexander R. C/O FIRST SOLAR, INC. 350 WEST WASHINGTON STREET, SUITE 600 TEMPE AZ 85281-1244 1 Chief Financial Officer Common Stock 2021-08-02 4 S 0 5261 87.80 D 22255 D Common Stock 2021-08-02 4 S 0 7776 88.45 D 14479 D Common Stock 2021-08-02 4 S 0 140 89.15 D 14339 D This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on May 5, 2021. This transaction was executed in multiple trades at prices ranging from $87.13 to $88.12. The price reported above reflects the weighted average sale price for the transactions reported on this line. This transaction was executed in multiple trades at prices ranging from $88.13 to $89.07. The price reported above reflects the weighted average sale price for the transactions reported on this line. This transaction was executed in multiple trades at prices ranging from $89.13 to $89.16. The price reported above reflects the weighted average sale price for the transactions reported on this line. /s/ Jason E. Dymbort, attorney-in-fact 2021-08-03