Sec Form 4 Filing - O'BRIEN KEVIN G. @ Kraton Performance Polymers, Inc. - 2011-04-06

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person O'BRIEN KEVIN G. 2. Issuer Name and Ticker or Trading Symbol Kraton Performance Polymers, Inc. [ KRA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O CCMP CAPITAL ADVISORS, LLC, 245 PARK AVENUE, 16TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 04/06/2011 (Street) NEW YORK, NY10167 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 04/06/2011 S 3,995,229 ( 1 ) D $ 36.0512 3,613 I See Footnotes ( 2 ) ( 3 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other O'BRIEN KEVIN G. C/O CCMP CAPITAL ADVISORS, LLC 245 PARK AVENUE, 16TH FLOOR NEW YORK, NY10167 X Signatures /s/ Elizabeth Guzman on behalf of Kevin G. O'Brien 04/08/2011 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This represents a disposition of the Issuer's securities by (i) J.P. Morgan Partners (BHCA), L.P. ("JPMP BHCA"), (ii) J.P. Morgan Partners Global Investors, L.P. ("J.P. Morgan Global"), (iii) JPMP Global Fund/Kraton A, L.P. ("JPMP Kraton A"), (iv) J.P. Morgan Partners Global Investors (Cayman) L.P. ("JPMP Cayman"), (v) J.P. Morgan Partners Global Investors (Cayman) II, L.P. ("JPMP Cayman II"), (vi) JPMP Global Fund/Kraton, L.P. ("JPMP Kraton"), (vii) J.P. Morgan Partners Global Investors (Selldown), L.P. ("JPMP Selldown"), (viii) JPMP Global Fund/Kraton/Selldown, L.P., ("JPMP Kraton Selldown"), (ix) J.P. Morgan Partners Global Investors (Selldown) II, L.P. ("JPMP Selldown II") and (x) JPMP Global Fund/Kraton/Selldown II L.P ("JPMP Kraton Selldown II", and together with J.P. Morgan Global, JPMP Kraton A, JPMP Cayman, JPMP Cayman II, JPMP Kraton, JPMP Selldown, JPMP Kraton Selldown, and JPMP Selldown II, the "Global Funds"). ( 2 )The amount shown represents the beneficial ownership of the Issuer's securities owned by JPMP BHCA and the Global Funds and includes 3,613 shares of common stock held by the Reporting Person. The Reporting Person was granted $50,000 of common stock of Kraton Performance Polymers, Inc. in consideration of his service on the Board of Directors of the Issuer. The price of the stock is based upon the average of the high and low prices of the common stock of Kraton Performance Polymers, Inc. as reported on the New York Stock Exchange on January 28, 2010. Pursuant to contractual undertakings by the Reporting Person, the Reporting Person is holding these shares for the benefit of JPMP BHCA. ( 3 )The Reporting Person is a limited partner of JPMP Master Fund Manager, L.P. ("JPMP MFM"). JPMP MFM is the general partner of JPMP BHCA and a limited partner of JPMP Global Investors, L.P. ("JPMP Global Investors"), the general partner of the Global Funds. The actual pro rata portion of beneficial ownership of any shares of the Issuer that may be deemed attributable to the Reporting Person is not readily determinable because it is subject to several variables, including the internal rate of return and vesting of interests within JPMP BHCA, JPMP MFM, JPMP Global Investors and the Global Funds. Mr. O'Brien disclaims beneficial ownership of the securities to the extent it exceeds his pecuniary interest therein.

Remarks: Elizabeth De Guzman is signing on behalf of Kevin G. O'Brien pursuant to an authorization and designation letter dated December 9, 2009, which was previously filed with the Securities and Exchange Commission on December 16, 2009.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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