X0305 4/A 2012-04-02 2012-04-03 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 2012-04-02 4 F 0 405 3.35 D 91156 D The Form 4 is being amended to remove any reference to shares acquired on April 2, 2012 as the acquisition of all shares underlying the restricted stock unit grant was previously reported by the Reporting Person on the Form 4 filed on August 19, 2011. Represents shares that were withheld to pay the minimum tax liability for the restricted stock units that vested on April 2, 2012. /s/ Scott C. Mahan 2012-04-13