X0202 4 2005-12-22 0 0001054721 BSQUARE CORP /WA BSQR 0001235814 TA ASSOCIATES AAP III PARTNERS 125 HIGH STREET SUITE 2500 BOSTON MA 02110 0 0 0 1 See General Remarks Common Stock 2005-12-22 4 S 0 4998 3.8113 D 263500 I See Footnote 1 Common Stock 2005-12-23 4 S 0 22803 3.8612 D 240697 I See Footnote 1 The reporting person may be deemed to have an indirect pecuniary interest as the General Partner of Advent Atlantic and Pacific III L.P. The reporting person disclaims benefical ownership of such shares because the reporting person's indirect pecuniary interest is subject to indeterminable future events. Member of a group which owns more than 10% in the aggregate. TA Associates AAP III Partners L.P. 2005-12-27 By: TA Associates, Inc., its General Partner 2005-12-27 By: Thomas P. Alber, Chief Financial Officer 2005-12-27