X0508 4 2024-03-04 0001274494 FIRST SOLAR, INC. FSLR 0001234459 ANTOUN GEORGES C/O FIRST SOLAR INC. 350 WEST WASHINGTON STREET, SUITE 600 TEMPE AZ 85288 1 Chief Commercial Officer 1 Common Stock 2024-03-04 4 S 0 5450 154.65 D 53258 D Common Stock 2024-03-04 4 S 0 7443 155.75 D 45815 D Common Stock 2024-03-04 4 S 0 3774 156.46 D 42041 D This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on May 15, 2023. This transaction was executed in multiple trades at prices ranging from $154.17 to $155.16. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. This transaction was executed in multiple trades at prices ranging from $155.17 to $156.15. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. This transaction was executed in multiple trades at prices ranging from $156.18 to $156.73. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. /s/ Jason E. Dymbort, attorney-in-fact 2024-03-05