Sec Form 4 Filing - Sauer Josef @ Polypore International, Inc. - 2015-08-26

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 Sauer Josef 2. Issuer Name and Ticker or Trading Symbol Polypore International, Inc. [ PPO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) President-Separations Media (Last) (First) (Middle) C/O POLYPORE INTERNATIONAL, INC., 11430 N. COMMUNITY HOUSE ROAD, SUITE 350 3. Date of Earliest Transaction (MM/DD/YY) 08/26/2015 (Street) CHARLOTTE, NC28277 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, par value $.01 per share 08/26/2015 D( 1 ) 14,267 D $ 60.5 0 D

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 Employee Stock Options $ 34.98 08/26/2015 D 30,494 ( 2 )( 3 ) 02/27/2024 Common Stock 30,494 $ 25.52 0 D Employee Stock Options $ 36.42 08/26/2015 D 32,541 ( 2 )( 3 ) 02/25/2023 Common Stock 32,541 $ 24.08 0 D Employee Stock Options $ 56.98 08/26/2015 D 160,000 ( 2 )( 3 ) 08/23/2021 Common Stock 160,000 $ 3.52 0 D Employee Stock Options $ 9.94 08/26/2015 D 62,640 ( 2 )( 3 ) 05/29/2019 Common Stock 62,640 $ 50.56 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Sauer Josef C/O POLYPORE INTERNATIONAL, INC. 11430 N. COMMUNITY HOUSE ROAD, SUITE 350 CHARLOTTE, NC28277 President-Separations Media Signatures By: /s/Josef Sauer 08/26/2015 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Reflects disposition of shares in exchange for cash price indicated pursuant to the Agreement and Plan of Merger by and among Asahi Kasei Corporation, ESM Holdings Corporation and Polypore International, Inc. dated February 23, 2015. ( 2 )Option was canceled in the merger between Polypore International, Inc. and ESM Holdings Corporation. in exchange for a cash payment of $60.50 minus exercise price. ( 3 )The options vest in three equal annual installments beginning on the date that is one year after they were issued.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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