X0303 4 2010-02-12 0 0000873044 RADISYS CORP RSYS 0001230511 LATTIN WILLIAM W 5445 NE DAWSON CREEK DRIVE HILLSBORO OR 97124 1 0 0 0 Common Stock 2010-02-12 4 P 0 300 8.3 A 40756 I by Trust Common Stock 2010-02-12 4 P 0 200 8.31 A 40956 I by Trust Common Stock 2010-02-12 4 P 0 100 8.32 A 41056 I by Trust Common Stock 2010-02-12 4 P 0 200 8.34 A 41256 I by Trust Common Stock 2010-02-12 4 P 0 1200 8.38 A 42456 I by Trust By: Brian Bronson, Attorney-In-Fact For: William W. Lattin 2010-02-12