X0508 4 2024-03-06 0001274494 FIRST SOLAR, INC. FSLR 0001776631 Jeffers Byron Michael C/O FIRST SOLAR, INC. 350 WEST WASHINGTON ST., SUITE 600 TEMPE AZ 85288 1 VP - Global Controller and CAO 0 Common Stock 2024-03-06 4 M 0 1153 0 A 2021 D Common Stock 2024-03-06 4 F 0 299 158.42 D 1722 D Common Stock 2024-03-06 4 M 0 244 0 A 1966 D Common Stock 2024-03-06 4 F 0 64 158.42 D 1902 D Common Stock 2024-03-06 4 M 0 165 0 A 2067 D Common Stock 2024-03-06 4 F 0 43 158.42 D 2024 D Restricted Stock Units 2024-03-06 4 M 0 1153 0 D Common Stock 1153 0 D Restricted Stock Units 2024-03-06 4 M 0 244 0 D Common Stock 244 488 D Restricted Stock Units 2024-03-06 4 M 0 165 0 D Common Stock 165 495 D Restricted Stock Units 2024-03-06 4 A 0 758 0 A Common Stock 758 758 D Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on March 6, 2020. Represents shares of common stock withheld by the Issuer to satisfy certain tax withholding obligations with the vesting of the restricted stock units. Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 6, 2021. Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 6, 2023. Each restricted stock unit represents the right to receive, upon vesting, one share of the Issuer's common stock in accordance with the Issuer's 2015 Omnibus Incentive Compensation Plan. The restricted stock units were granted on March 6, 2020 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2020 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date. Each restricted stock unit represents the right to receive, upon vesting, one share of the Issuer's common stock in accordance with the Issuer's 2020 Omnibus Incentive Compensation Plan. The restricted stock units were granted on March 6, 2021 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2021 vest annually at a rate of 20% on each anniversary of the grant date, commencing on the first anniversary of the grant date. The restricted stock units were granted on March 6, 2023 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2023 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date. The restricted stock units were granted on March 6, 2024 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2024 vest annually at a rate of 25% on each anniversary of the grant date, commencing on the first anniversary of the grant date. /s/ Jason E. Dymbort, attorney-in-fact 2024-03-08