X0303 4 2011-04-27 0001274494 FIRST SOLAR, INC. FSLR 0001311491 Gustafsson Mary Elizabeth C/O FIRST SOLAR, INC 350 WEST WASHINGTON STREET, SUITE 600 TEMPE AZ 85281 1 EVP, General Counsel, Secty. Common Stock 2011-04-27 4 M 0 1539 0 A 4378 D Common Stock 2011-04-27 4 F 0 631 138.59 D 3747 D Restricted Stock Units 2011-04-27 4 M 0 1539 0 D Common Stock 1539 4614 D Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on April 27, 2009. Represents shares of common stock withheld by the Issuer to satisfy certain tax withholding obligations associated 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 Amended and Restated 2006 Omnibus Incentive Compensation Plan. The restricted stock units were granted on April 27, 2009 as part of the Issuer's annual equity grant to executive officers. These units are scheduled to vest annually at a rate of 20% on each of the first three anniversaries of the grant date, and 40% on the fourth anniversary of the grant date. /s/ Peter C. Bartolino, Attorney-in-fact 2011-04-29