X0303 4 2011-06-20 0001321646 Kraton Performance Polymers, Inc. KRA 0001478413 Duffy Stephen W. C/O KRATON PERFORMANCE POLYMERS 15710 JOHN F. KENNEDY BLVD, SUITE 300 HOUSTON TX 77032 1 General Counsel, VP & Sec Common Stock 2011-06-20 4 M 0 24670 13.512 A 27095 D Common Stock 2011-06-20 4 M 0 3700 14.46 A 30795 D Common Stock 2011-06-20 4 S 0 27565 36.6704 D 3230 D Common Stock 2011-06-20 4 S 0 805 37.2919 D 2425 D Employee Options (Right to Buy) 13.512 2011-06-20 4 M 0 24670 0 D 2018-06-19 Common Stock 24670 0 D Employee Options (Right to Buy) 14.46 2011-06-20 4 M 0 3700 0 D 2020-01-03 Common Stock 3700 14802 D Transacted under a 10b5-1 plan that was adopted on March 7, 2011. The price in column 4 is a weighted average. The prices actually received ranged from $36.23 to $37.21. 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. Cancel The price in column 4 is a weighted average. The prices actually received ranged from $37.23 to $37.40. 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. Cancel The options vested in three equal installments on each anniversary of the vesting commencement date, June 19, 2008. The options shall vest with respect to 20% of the underlying common stock on each of the first five anniversaries of the grant date, January 3, 2010, subject to the executive's being employed by the company on the vesting date. /s/ Stephen E. Tremblay As Attorney-in-Fact for Stephen W. Duffy 2011-06-22