X0303 4 2009-04-30 0001274494 FIRST SOLAR, INC. FSLR 0001338099 Estate of John T. Walton P.O. BOX 1860 BENTONVILLE AR 72712 1 Common Stock 2009-04-30 4 S 0 39949 177.43 D 18963908 D Common Stock 2009-04-30 4 S 0 69748 178.64 D 18894160 D Common Stock 2009-04-30 4 S 0 84783 179.80 D 18809377 D Common Stock 2009-04-30 4 S 0 4020 180.42 D 18805357 D Common Stock 2009-04-30 4 S 0 700 181.57 D 18804657 D Common Stock 2009-04-30 4 S 0 800 182.82 D 18803857 D This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. This transaction was executed in multiple trades at prices ranging from $177.15 to $178.11. 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 $178.19 to $179.19. 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 $179.20 to $180.20. 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 $180.21 to $181.20. 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 $181.26 to $181.94. 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 $182.44 to $183.13. The price reported above reflects the weighted average sale price for the transactions reported on this line. A total of 200,000 shares were sold on this date in multiple transactions at prices ranging from $177.15 to $183.13, with a total weighted average sale price of $178.96. The reporting person undertakes to provide upon request by the staff of the SEC, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. /s/ Peter C. Bartolino, Attorney-in-fact 2009-05-04