X0303 4 2011-02-22 0 0001054721 BSQUARE CORP /WA BSQR 0001275219 MAHAN SCOTT C 110 - 110TH AVE., NE SUITE 200 BELLEVUE WA 98004 0 1 0 0 Vice Pres. Finance, CFO Common Stock 2011-02-22 4 A 0 25000 0.00 A 53614 D Common Stock 2011-02-22 4 A 0 4972 0.00 A 58586 D Common Stock 2011-02-22 4 F 0 3573 11.83 D 55013 D Represents an award of restricted stock units that was originally granted on August 3, 2010 with the vesting subject to achievement of a performance metric, which the Board of Directors determined was satisfied on February 22, 2011. Fifty percent of the grant vested upon that determination with the remainder vesting over time. Represents an award of restricted stock units under the Company's Annual Executive Bonus Program, which was granted on February 22, 2011. These restricted stock units vest in four equal amounts at the end of July and December of 2011 and 2012. Represents shares that were withheld to pay the minimum tax liability for the restricted stock units that vested on February 22, 2011. /s/ Scott C. Mahan 2011-02-24