X0508 4 2026-03-06 0001274494 FIRST SOLAR, INC. FSLR 0002052277 Theurer Nathan B. C/O FIRST SOLAR, INC. 4300 E CAMELBACK ROAD, SUITE 220 PHOENIX AZ 85018 1 VP - Global Controller and CAO 0 Common Stock 2026-03-06 4 M 0 133 0 A 133 D Common Stock 2026-03-06 4 M 0 82 0 A 215 D Common Stock 2026-03-06 4 M 0 95 0 A 310 D Common Stock 2026-03-06 4 M 0 171 0 A 481 D Common Stock 2026-03-09 4 S 0 43 190.36 D 438 D Common Stock 2026-03-09 4 S 0 27 190.36 D 411 D Common Stock 2026-03-09 4 S 0 32 190.36 D 379 D Common Stock 2026-03-09 4 S 0 55 190.36 D 324 D Restricted Stock Units 2026-03-06 4 M 0 133 0 D Common Stock 133 0 D Restricted Stock Units 2026-03-06 4 M 0 82 0 D Common Stock 82 83 D Restricted Stock Units 2026-03-06 4 M 0 95 0 D Common Stock 95 190 D Restricted Stock Units 2026-03-06 4 M 0 171 0 D Common Stock 171 516 D Restricted Stock Units 2026-03-06 4 A 0 635 0 A Common Stock 635 635 D 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 25% of the restricted stock units granted on March 6, 2023. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on March 6, 2024. Represents shares of common stock issued upon vesting of 25% of the restricted stock units granted on March 6, 2025. Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the restricted stock units. 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 certain associates. 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 certain associates. 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 certain associates. 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. The restricted stock units were granted on March 6, 2025 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2025 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, 2026 as part of the Issuer's annual equity grant to executive officers. The restricted stock units granted on March 6, 2026 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 2026-03-10