X0303 4 2011-01-07 0001321646 Kraton Performance Polymers, Inc. KRA 0001478571 Tremblay Stephen E. C/O KRATON PERFORMANCE POLYMERS 15710 JOHN F. KENNEDY BLVD, SUITE 300 HOUSTON TX 77032 1 CFO and Vice President Common Stock 2011-01-07 4 M 0 24527 13.512 A 39329 D Common Stock 2011-01-07 4 S 0 24527 31.8196 D 14802 D Employee Options (Right to Buy) 13.512 2011-01-07 4 M 0 24527 0 D 2018-06-19 Common Stock 24527 62619 D Transacted under a 10b5-1 plan that was adopted on November 9, 2010. The price in column 4 is a weighted average. The prices actually received ranged from $31.69 to $32.31. For all transactions reported in this Form 4 utilizing a weighted average price, the reporting person undertakes to provide upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range. 3,413 of the options reported herein have vested and are immediately exercisable. The remaining 59,206 options will vest on June 19, 2011, subject to Stephen E. Tremblay (the "Reporting Person") being employed by the company or its affiliates or subsidiaries on the vesting date. /s/ Stephen W. Duffy As Attorney-in-Fact for Stephen E. Tremblay 2011-01-10