X0303 4 2009-02-10 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 2009-02-10 4 D 0 1422 0.00 D 24614 D Represents forfeiture of restricted stock units by agreement between the reporting person and the issuer in connection with the issuer's anticipated restatement of its financial statements for fiscal year 2007, and for the first and second quarters of fiscal year 2008, as reported on the issuer's Form 8-K filed on February 11, 2009. These restricted stock units were granted on January 31, 2008 under the issuer's Annual Executive Bonus Program on the basis of the issuer's previously reported results for fiscal year 2007. /s/ Scott C. Mahan 2009-02-12