X0303 4 2011-02-01 0 0001292556 Polypore International, Inc. PPO 0001392918 Hauswald Pierre C/O POLYPORE INTERNATIONAL, INC. 11430 N. COMMUNITY HOUSE ROAD, SUITE 350 CHARLOTTE NC 28277 0 1 0 0 VP & General Manager Common Stock, par value $.01 per share 2011-02-01 4 M 0 20000 5.24 A 20000 D Common Stock, par value $.01 per share 2011-02-01 4 S 0 20000 48.84 D 0 D Employee Stock Options (right to buy) 5.24 2011-02-01 4 M 0 20000 0 D 2016-06-15 Common Stock 20000 8153 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 23, 2010. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.66 to $49.14, inclusive. The reporting person undertakes to provide Polypore International, Inc., any security holder of Polypore International, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The options vested in four equal annual installments beginning on March 9, 2007, and therefore are currently exercisable. /s/ Pierre Hauswald 2011-02-03