PPO / - تصريحات هيئة الأوراق المالية والبورصات، التقرير السنوي، بيان الوكيل

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الإحصائيات الأساسية
CIK 1292556
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to
SEC Filings (Chronological Order)
توفر هذه الصفحة قائمة كاملة ومرتبة ترتيبًا زمنيًا لتصريحات هيئة الأوراق المالية والبورصات، باستثناء تصريحات الملكية التي نقدمها في مكان آخر.
February 12, 2016 EX-1

JOINT FILING AGREEMENT

EX-1 2 d120476dex1.htm JOINT FILING AGREEMENT EXHIBIT 1 JOINT FILING AGREEMENT Waddell & Reed Financial, Inc., Waddell & Reed Financial Services, Inc., Waddell & Reed, Inc., Waddell & Reed Investment Management Company and Ivy Investment Management Company (the “Filing Persons”), hereby agree to file jointly a Schedule 13G and any amendments thereto relating to the aggregate ownership by each of t

February 12, 2016 EX-3

POWER OF ATTORNEY

Power of Attorney EXHIBIT 3 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, THAT: The undersigned, Waddell & Reed Financial, Inc.

February 12, 2016 SC 13G/A

PPO / / WADDELL & REED FINANCIAL INC - POLYPORE INTERNATIONAL Passive Investment

Polypore International UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

February 12, 2016 EX-2

EXHIBIT 2

Identification and Classification of the Subsidiary Which Acquired the Security EXHIBIT 2 Waddell & Reed Investment Management Company - Tax ID No. 48-1106973 Investment Advisor registered under Section 203 of the Investment Advisors Act of 1940 Ivy Investment Management Company - Tax ID No. 03-0481447 Investment Advisor registered under Section 203 of the Investment Advisors Act of 1940

September 8, 2015 15-12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13

15-12B UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 1-32266 POLYPORE INTERNATIONAL, INC. (Exact Name of Registrant as Spec

August 31, 2015 S-8 POS

As filed with the Securities and Exchange Commission on August 31, 2015

Form S-8 POS As filed with the Securities and Exchange Commission on August 31, 2015 Registration No.

August 31, 2015 S-8 POS

As filed with the Securities and Exchange Commission on August 31, 2015

As filed with the Securities and Exchange Commission on August 31, 2015 Registration No.

August 31, 2015 S-8 POS

As filed with the Securities and Exchange Commission on August 31, 2015

Form S-8 POS As filed with the Securities and Exchange Commission on August 31, 2015 Registration No.

August 31, 2015 S-8 POS

As filed with the Securities and Exchange Commission on August 31, 2015

Form S-8 POS As filed with the Securities and Exchange Commission on August 31, 2015 Registration No.

August 26, 2015 EX-99.1

1

EX-99.1 4 d66421dex991.htm EX-99.1 Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 [email protected] www.polypore.net FOR IMMEDIATE RELEASE Polypore Announces Completion of Merger with Asahi Kasei CHARLOTTE, N.C., August 26, 2015 – Polypore International, Inc. (NYSE: PPO) announces that the sale of

August 26, 2015 EX-99.25

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES The New York Stock Exchange hereby notifies the SEC of its intention to remove the entire class of the stated securities from listing and registration on the Exchange at the opening of business on September 8, 2015, pursuant to the provisions of Rule 12d2-2 (a).

August 26, 2015 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 26, 2015 POLYPORE INTERNATI

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 26, 2015 POLYPORE INTERNATIONAL, INC. (Exact Name of Registrant as Specified in Charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commissi

August 26, 2015 EX-3.1

CERTIFICATE OF INCORPORATION POLYPORE INTERNATIONAL, INC. ARTICLE ONE

Exhibit 3.1 CERTIFICATE OF INCORPORATION OF POLYPORE INTERNATIONAL, INC. ARTICLE ONE The name of the Company is Polypore International, Inc. (the ?Company?). ARTICLE TWO The address of the registered office of the Company in the State of Delaware is 1209 Orange Street, Wilmington, New Castle County, Delaware 19801. The name of the Company?s registered agent for service of process in the State of D

August 26, 2015 EX-3.2

AMENDED AND RESTATED POLYPORE INTERNATIONAL, INC. ARTICLE I

Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF POLYPORE INTERNATIONAL, INC. ARTICLE I OFFICES SECTION 1. REGISTERED OFFICE. The registered office shall be established and maintained at the office of The Corporation Trust Company, in the City of Wilmington, in the County of New Castle, in the State of Delaware, and said corporation shall be the registered agent of this corporation in charge thereof. SE

August 19, 2015 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 19, 2015 POLYPORE INTERNATIO

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 19, 2015 POLYPORE INTERNATIONAL, INC.

August 13, 2015 10-Q

PPO / 10-Q - Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ý Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended July 4, 2015 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

August 13, 2015 EX-99.1

(NYSE Listed: PPO) Second Quarter 2015 Supplemental Financial Information Exhibit 99.1 These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities,

(NYSE Listed: PPO) Second Quarter 2015 Supplemental Financial Information Exhibit 99.

August 13, 2015 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 13, 2015 POLYPORE INTERNATIO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 13, 2015 POLYPORE INTERNATIONAL, INC.

August 6, 2015 SC 13G/A

PPO / / PRIMECAP MANAGEMENT CO/CA/ - SC 13G/A Passive Investment

SC 13G/A 1 a15-171154sc13ga.htm SC 13G/A UNITED STATES OMB APPROVAL SECURITIES AND EXCHANGE COMMISSION OMB Number: 3235-0145 Washington, D.C. 20549 Expires: February 28, 2009 Estimated average burden hours per response. . . . . . . .10.4 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* Polypore International Inc. (Name of Issuer) Common (Title of Class of Securities) 73179

May 12, 2015 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 12, 2015 POLYPORE INTERNATIONAL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 12, 2015 POLYPORE INTERNATIONAL, INC.

May 8, 2015 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ý Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended April 4, 2015 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

May 8, 2015 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 8, 2015 POLYPORE INTERNATIONAL,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 8, 2015 POLYPORE INTERNATIONAL, INC.

May 8, 2015 EX-99.1

(NYSE Listed: PPO) First Quarter 2015 Supplemental Financial Information Exhibit 99.1 These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities,

(NYSE Listed: PPO) First Quarter 2015 Supplemental Financial Information Exhibit 99.

April 8, 2015 DEFM14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFM14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 7, 2015 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K/A (Amendment No. 1)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K/A (Amendment No.

March 25, 2015 PREM14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

PREM14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 4, 2015 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K

10-K 1 a2223195z10-k.htm 10-K Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended January 3, 2015 Or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECUR

March 4, 2015 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 4, 2015 POLYPORE INTERNATIONAL, INC.

March 4, 2015 EX-21.1

SUBSIDIARIES OF POLYPORE INTERNATIONAL, INC.

EX-21.1 2 a2223195zex-211.htm EX-21.1 QuickLinks - Click here to rapidly navigate through this document Exhibit 21.1 SUBSIDIARIES OF POLYPORE INTERNATIONAL, INC. Name of Subsidiary State or jurisdiction of Incorporation or Organization Celgard Acquisition Corporation Cayman Islands Celgard Korea, Limited South Korea Celgard, LLC Delaware Daramic Battery Separator India Private Limited India Darami

March 4, 2015 EX-99.1

(NYSE Listed: PPO) Fourth Quarter 2014 Supplemental Financial Information

Exhibit 99.1 (NYSE Listed: PPO) Fourth Quarter 2014 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

February 26, 2015 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (RULE 14A-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

DFAN14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (RULE 14A-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨

February 24, 2015 DEFA14A

PPO / DEFA14A - - 8-K

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 23, 2015 POLYPORE INTERNATIONAL, INC. (Exact Name of Registrant as Specified in Charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commis

February 24, 2015 EX-2.1

AGREEMENT AND PLAN OF MERGER BY AND AMONG ASAHI KASEI CORPORATION, ESM HOLDINGS CORPORATION POLYPORE INTERNATIONAL, INC. DATED AS OF FEBRUARY 23, 2015 TABLE OF CONTENTS Page ARTICLE I THE MERGER Section 1.01. The Merger 2 Section 1.02. Closing; Effec

EX-2.1 Exhibit 2.1 EXECUTION VERSION AGREEMENT AND PLAN OF MERGER BY AND AMONG ASAHI KASEI CORPORATION, ESM HOLDINGS CORPORATION AND POLYPORE INTERNATIONAL, INC. DATED AS OF FEBRUARY 23, 2015 TABLE OF CONTENTS Page ARTICLE I THE MERGER Section 1.01. The Merger 2 Section 1.02. Closing; Effective Time 2 Section 1.03. Effects of the Merger 2 Section 1.04. Certificate of Incorporation and Bylaws 3 Sec

February 24, 2015 EX-99.1

Polypore Signs Definitive Agreements for Sale of the Company

EX-99.1 5 d878944dex991.htm EX-99.1 Exhibit 99.1 Polypore Signs Definitive Agreements for Sale of the Company CHARLOTTE, N.C., Feb. 23, 2015 (GLOBE NEWSWIRE) — Polypore International, Inc. (NYSE:PPO) announces today that it has signed definitive agreements for the sale of the Company. In the merger agreement, Asahi Kasei Corporation (“Asahi Kasei,”) (TSE1:3407), through a U.S. subsidiary, will pur

February 24, 2015 EX-3.1

POLYPORE INTERNATIONAL, INC. THIRD AMENDED AND RESTATED BYLAWS ARTICLE I

Exhibit 3.1 POLYPORE INTERNATIONAL, INC. THIRD AMENDED AND RESTATED BYLAWS ARTICLE I OFFICES The registered office of Polypore International, Inc. (the “Corporation”) in the State of Delaware shall be at 2711 Centerville Road, Suite 400, Wilmington, County of New Castle, Delaware 19808, and The Corporation Service Company will be the resident agent of the Corporation in charge thereof. The Corpora

February 24, 2015 EX-99.1

Polypore Signs Definitive Agreements for Sale of the Company

Exhibit 99.1 Polypore Signs Definitive Agreements for Sale of the Company CHARLOTTE, N.C., Feb. 23, 2015 (GLOBE NEWSWIRE) — Polypore International, Inc. (NYSE:PPO) announces today that it has signed definitive agreements for the sale of the Company. In the merger agreement, Asahi Kasei Corporation (“Asahi Kasei,”) (TSE1:3407), through a U.S. subsidiary, will purchase the Company for $60.50 per sha

February 24, 2015 EX-2.2

ASSET PURCHASE AGREEMENT dated as of February 23, 2015 POLYPORE INTERNATIONAL, INC. 3M COMPANY TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 1 Section 1.01 Certain Defined Terms 1 ARTICLE II PURCHASE AND SALE 1 Section 2.01 Purchase and Sale of Assets

EX-2.2 Exhibit 2.2 EXECUTION VERSION ASSET PURCHASE AGREEMENT dated as of February 23, 2015 among POLYPORE INTERNATIONAL, INC. and 3M COMPANY TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 1 Section 1.01 Certain Defined Terms 1 ARTICLE II PURCHASE AND SALE 1 Section 2.01 Purchase and Sale of Assets 1 Section 2.02 Assignment of Certain Transferred Assets 7 Section 2.03 Closing 8 Section 2.04 Purchase

February 24, 2015 EX-3.1

POLYPORE INTERNATIONAL, INC. THIRD AMENDED AND RESTATED BYLAWS ARTICLE I

EX-3.1 Exhibit 3.1 POLYPORE INTERNATIONAL, INC. THIRD AMENDED AND RESTATED BYLAWS ARTICLE I OFFICES The registered office of Polypore International, Inc. (the “Corporation”) in the State of Delaware shall be at 2711 Centerville Road, Suite 400, Wilmington, County of New Castle, Delaware 19808, and The Corporation Service Company will be the resident agent of the Corporation in charge thereof. The

February 24, 2015 DEFA14A

PPO / DEFA14A - - DEFA14A

DEFA14A 1 d879252ddefa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, For Use of the Commission Only (as permitted by Rule

February 24, 2015 EX-2.2

ASSET PURCHASE AGREEMENT dated as of February 23, 2015 POLYPORE INTERNATIONAL, INC. 3M COMPANY TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 1 Section 1.01 Certain Defined Terms 1 ARTICLE II PURCHASE AND SALE 1 Section 2.01 Purchase and Sale of Assets

EX-2.2 Exhibit 2.2 EXECUTION VERSION ASSET PURCHASE AGREEMENT dated as of February 23, 2015 among POLYPORE INTERNATIONAL, INC. and 3M COMPANY TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 1 Section 1.01 Certain Defined Terms 1 ARTICLE II PURCHASE AND SALE 1 Section 2.01 Purchase and Sale of Assets 1 Section 2.02 Assignment of Certain Transferred Assets 7 Section 2.03 Closing 8 Section 2.04 Purchase

February 24, 2015 DEFA14A

PPO / DEFA14A - - DEFA14A

DEFA14A 1 d879228ddefa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, For Use of the Commission Only (as permitted by Rule

February 24, 2015 EX-2.1

AGREEMENT AND PLAN OF MERGER BY AND AMONG ASAHI KASEI CORPORATION, ESM HOLDINGS CORPORATION POLYPORE INTERNATIONAL, INC. DATED AS OF FEBRUARY 23, 2015 TABLE OF CONTENTS Page ARTICLE I THE MERGER Section 1.01. The Merger 2 Section 1.02. Closing; Effec

EX-2.1 Exhibit 2.1 EXECUTION VERSION AGREEMENT AND PLAN OF MERGER BY AND AMONG ASAHI KASEI CORPORATION, ESM HOLDINGS CORPORATION AND POLYPORE INTERNATIONAL, INC. DATED AS OF FEBRUARY 23, 2015 TABLE OF CONTENTS Page ARTICLE I THE MERGER Section 1.01. The Merger 2 Section 1.02. Closing; Effective Time 2 Section 1.03. Effects of the Merger 2 Section 1.04. Certificate of Incorporation and Bylaws 3 Sec

February 24, 2015 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 23, 2015 POLYPORE INTERNATIONAL, INC. (Exact Name of Registrant as Specified in Charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commis

February 23, 2015 DEFA14A

PPO / DEFA14A - - DEFA14A

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Pro

February 23, 2015 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (RULE 14A-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

DFAN 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (RULE 14A-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement

February 23, 2015 DEFA14A

PPO / DEFA14A - - DEFA14A

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Pro

February 23, 2015 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (RULE 14A-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

DFAN 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (RULE 14A-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ¨ Filed by a party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement

February 23, 2015 DFAN14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (RULE 14A-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Ame

DFAN14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (RULE 14A-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ¨ Filed by a Party other than the Registrant x Check the appropriate box: ¨ Preliminary Proxy Statement ¨

February 13, 2015 EX-1

JOINT FILING AGREEMENT

EX-1 2 d869190dex1.htm JOINT FILING AGREEMENT EXHIBIT 1 JOINT FILING AGREEMENT Waddell & Reed Financial, Inc., Waddell & Reed Financial Services, Inc., Waddell & Reed, Inc., Waddell & Reed Investment Management Company and Ivy Investment Management Company (the “Filing Persons”), hereby agree to file jointly a Schedule 13G and any amendments thereto relating to the aggregate ownership by each of t

February 13, 2015 EX-2

EXHIBIT 2

EX-2 3 d869190dex2.htm IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY EXHIBIT 2 Waddell & Reed Investment Management Company - Tax ID No. 48-1106973 Investment Advisor registered under Section 203 of the Investment Advisors Act of 1940 Ivy Investment Management Company - Tax ID No. 03-0481447 Investment Advisor registered under Section 203 of the Investment Advisor

February 13, 2015 EX-3

POWER OF ATTORNEY

Power of Attorney EXHIBIT 3 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, THAT: The undersigned, Waddell & Reed Financial, Inc.

February 13, 2015 SC 13G/A

PPO / / PRIMECAP MANAGEMENT CO/CA/ - SC 13G/A Passive Investment

UNITED STATES OMB APPROVAL SECURITIES AND EXCHANGE COMMISSION OMB Number: 3235-0145 Washington, D.

February 13, 2015 SC 13G/A

PPO / / WADDELL & REED FINANCIAL INC - POLYPORE INTERNATIONAL Passive Investment

SC 13G/A 1 d869190dsc13ga.htm POLYPORE INTERNATIONAL UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Amendment No. 2* Polypore International, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 73179V103 (CUSIP Number) December 31, 2014 (Date of Event Which Requires Filing of this Statement) Check the appr

February 11, 2015 SC 13G/A

PPO / / VANGUARD GROUP INC Passive Investment

polyporeinternationalinc.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2 )* Name of issuer: Polypore International Inc Title of Class of Securities: Common Stock CUSIP Number: 73179V103 Date of Event Which Requires Filing of this Statement: December 31, 2014 Check the

November 6, 2014 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 27, 2014 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

November 6, 2014 EX-99.1

(NYSE Listed: PPO) Investor Presentation November 2014 © 2014 Polypore International, Inc. ALL RIGHTS RESERVED

Exhibit 99.1 (NYSE Listed: PPO) Investor Presentation November 2014 © 2014 Polypore International, Inc. ALL RIGHTS RESERVED 2 Forward-Looking Statements These materials include "forward-looking statements". All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in t

November 6, 2014 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 5, 2014 POLYPORE INTERNATIONAL, INC.

November 5, 2014 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, N.C. 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports Third Quarter 2014 Results · Reports year-over-year growth in all segments and Adjusted EPS of $0.33 · Signs Letter of Intent (LOI) with Panasonic Corporation (“Panasonic”) to de

November 5, 2014 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 5, 2014 POLYPORE INTERNATIONAL, INC.

November 5, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 5, 2014 POLYPORE INTERNATIONAL, INC.

November 5, 2014 EX-99.2

(NYSE Listed: PPO) Third Quarter 2014 Supplemental Financial Information

Exhibit 99.2 (NYSE Listed: PPO) Third Quarter 2014 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

November 5, 2014 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 [email protected] www.polypore.net FOR IMMEDIATE RELEASE Polypore and Panasonic Sign Letter of Intent for Lithium-Ion Battery Separator Development CHARLOTTE, N.C., November 5, 2014 — Polypore International, Inc.’s (NYSE: PPO) Celgard, LLC subsidiary (

August 7, 2014 EX-10.1

CREDIT AGREEMENT Dated as of April 8, 2014 POLYPORE INTERNATIONAL, INC., as the Borrower, BANK OF AMERICA, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, The Other Lenders Party Hereto WELLS FARGO BANK, NATIONAL ASSOCIATION, as S

Exhibit 10.1 Execution Version Published CUSIP Number: 73179KAF4 Revolving Loan Facility CUSIP Number: 73179KAG2 Term Loan Facility CUSIP Number: 73179KAH0 CREDIT AGREEMENT Dated as of April 8, 2014 among POLYPORE INTERNATIONAL, INC., as the Borrower, BANK OF AMERICA, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, and The Other Lenders Party Hereto WELLS FARGO BANK, NATIONAL A

August 7, 2014 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 28, 2014 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

August 6, 2014 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, N.C. 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports Second Quarter 2014 Results · Polypore continues to deliver solid performance and reports Adjusted EPS of $0.35 · New vehicle model introductions continue to show promise for add

August 6, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 6, 2014 POLYPORE INTERNATIONAL, INC.

August 6, 2014 EX-99.2

(NYSE Listed: PPO) Second Quarter 2014 Supplemental Financial Information

EX-99.2 3 a14-184981ex99d2.htm EX-99.2 Exhibit 99.2 (NYSE Listed: PPO) Second Quarter 2014 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looki

July 21, 2014 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 18, 2014 POLYPORE INTERNATIO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 18, 2014 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commissio

July 21, 2014 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net FOR IMMEDIATE RELEASE Polypore Receives Favorable Ruling On Preliminary Injunction Against LG Chem, Ltd. CHARLOTTE, N.C. ? July 21, 2014 ? Polypore International, Inc. (NYSE: PPO), announced today that the Unite

June 16, 2014 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 13, 2014 POLYPORE INTERNATIONAL, INC.

June 16, 2014 EX-16.1

June 16, 2014

Exhibit 16.1 EXHIBIT 16 TO FORM 8-K June 16, 2014 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Ladies and Gentlemen: We have read Item 4.01 of Form 8-K dated 16 June 2014, of Polypore International, Inc. and are in agreement with the statements contained in the third and fourth paragraphs on page 2 therein. We have no basis to agree or disagree with other statements o

May 22, 2014 S-8

- S-8

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 POLYPORE INTERNATIONAL, INC.

May 22, 2014 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 22, 2014 POLYPORE INTERNATIONAL, INC.

May 22, 2014 EX-99.1

(NYSE Listed: PPO) Investor Presentation May-June, 2014

Exhibit 99.1 (NYSE Listed: PPO) Investor Presentation May-June, 2014 2 Forward-Looking Statements These materials include "forward-looking statements". In these materials, the words “Polypore,” “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unless the context indicates otherwise. All statements other than statements o

May 15, 2014 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 13, 2014 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commission

May 8, 2014 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, N.C. 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Announces Long-Term Lithium Separator Supply Agreement with Panasonic CHARLOTTE, N.C., May 8, 2014 — Polypore International, Inc. (NYSE:PPO) today announced that its Celgard subsidiary a

May 8, 2014 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 29, 2014 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

May 8, 2014 EX-10.1

CREDIT AGREEMENT Dated as of April 8, 2014 POLYPORE INTERNATIONAL, INC., as the Borrower, BANK OF AMERICA, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, The Other Lenders Party Hereto WELLS FARGO BANK, NATIONAL ASSOCIATION, as S

EX-10.1 2 a14-81551ex10d1.htm EX-10.1 Exhibit 10.1 Execution Version Published CUSIP Number: 73179KAF4 Revolving Loan Facility CUSIP Number: 73179KAG2 Term Loan Facility CUSIP Number: 73179KAH0 CREDIT AGREEMENT Dated as of April 8, 2014 among POLYPORE INTERNATIONAL, INC., as the Borrower, BANK OF AMERICA, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, and The Other Lenders Par

May 8, 2014 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 8, 2014 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commission

May 8, 2014 EX-99.2

(NYSE Listed: PPO) First Quarter 2014 Supplemental Financial Information

Exhibit 99.2 (NYSE Listed: PPO) First Quarter 2014 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

May 8, 2014 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, N.C. 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports First Quarter 2014 Results · Separations Media and Transportation and Industrial segments continue to deliver solid performance · New vehicle model introductions show promise for

May 8, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 8, 2014 POLYPORE INTERNATIONAL, INC.

May 1, 2014 DEFA14A

- DEFA14A

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 8, 2014 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, N.C. 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Announces New $650 Million Senior Secured Credit Agreement and Redemption of 7.5% Senior Notes · Company uses cash on hand and new credit agreement to refinance existing credit agreement

April 8, 2014 8-K

Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 8, 2014 POLYPORE INTERNATIONAL, INC. (Exact name of registrant as specified in its charter) Delaware 1-32266 43-2049334 (State or other jurisdiction of incorporation) (Commissio

April 7, 2014 DEF 14A

- DEF 14A

DEF 14A 1 a2219434zdef14a.htm DEF 14A Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box

March 27, 2014 EX-99.1

(NYSE Listed: PPO) Investor Presentation March 2014

Exhibit 99.1 (NYSE Listed: PPO) Investor Presentation March 2014 2 Safe Harbor Statement These materials include "forward-looking statements". In these materials, the words “Polypore,” “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unless the context indicates otherwise. All statements other than statements of histori

March 27, 2014 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 27, 2014 POLYPORE INTERNATIONAL, INC.

February 25, 2014 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 25, 2014 POLYPORE INTERNATIONAL, INC.

February 25, 2014 EX-21.1

SUBSIDIARIES OF POLYPORE INTERNATIONAL, INC.

QuickLinks - Click here to rapidly navigate through this document Exhibit 21.1 SUBSIDIARIES OF POLYPORE INTERNATIONAL, INC. Name of Subsidiary State or jurisdiction of Incorporation or Organization Celgard Acquisition Corporation. Cayman Islands Celgard Korea, Limited South Korea Celgard, LLC Delaware Daramic Battery Separator India Private Limited India Daramic Tianjin PE Separator Co., Ltd. Chin

February 25, 2014 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K

Use these links to rapidly review the document Table of Contents Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIESEXCHANGE ACT OF 1934 For the fiscal year ended December 28, 2013 Or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 1-32266 Polypore International, Inc.

February 25, 2014 EX-99.1

###

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore to Attend the Stifel Nicolaus 2014 Industrials Conference CHARLOTTE, N.C. — February 25, 2014 — Polypore International, Inc. (NYSE:PPO) announces that it will participate in a discussion w

February 24, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 24, 2014 POLYPORE INTERNATIONAL, INC.

February 24, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 24, 2014 POLYPORE INTERNATIONAL, INC.

February 24, 2014 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, N.C. 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports Fourth Quarter and Full Year 2013 Results · Separations Media and Transportation and Industrial segments delivered solid performance · Electronics and Electric Drive Vehicles (“E

February 24, 2014 EX-99.1

(NYSE Listed: PPO) Fourth Quarter 2013 Supplemental Financial Information

Exhibit 99.1 (NYSE Listed: PPO) Fourth Quarter 2013 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

February 14, 2014 SC 13G/A

PPO / / GENERATION INVESTMENT MANAGEMENT LLP - SCHEDULE 13G AMENDMENT FILING Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

February 14, 2014 SC 13G/A

PPO / / Wellington Management Group LLP - DISCLOSURE DOCUMENT Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* Polypore International, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 73179V103 (CUSIP Number) December 31, 2013 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 11, 2014 SC 13G/A

PPO / / VANGUARD GROUP INC Passive Investment

polyporeinternationalinc.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1 )* Name of issuer: Polypore International Inc Title of Class of Securities: Common Stock CUSIP Number: 73179V103 Date of Event Which Requires Filing of this Statement: December 31, 2013 Check the

February 10, 2014 SC 13G/A

PPO / / PRIMECAP MANAGEMENT CO/CA/ - SC 13G/A Passive Investment

OMB APPROVAL UNITED STATES OMB Number: 3235-0145 SECURITIES AND EXCHANGE COMMISSION Expires: February 28, 2009 Washington, D.

February 10, 2014 SC 13G/A

PPO / / PRIMECAP MANAGEMENT CO/CA/ - SC 13G/A Passive Investment

OMB APPROVAL UNITED STATES OMB Number: 3235-0145 SECURITIES AND EXCHANGE COMMISSION Expires: February 28, 2009 Washington, D.

February 7, 2014 EX-1

JOINT FILING AGREEMENT

Joint Filing Agreement EXHIBIT 1 JOINT FILING AGREEMENT Waddell & Reed Financial, Inc.

February 7, 2014 EX-2

EXHIBIT 2

EXHIBIT 2 Waddell & Reed Investment Management Company - Tax ID No. 48-1106973 Investment Advisor registered under Section 203 of the Investment Advisors Act of 1940 Ivy Investment Management Company - Tax ID No. 03-0481447 Investment Advisor registered under Section 203 of the Investment Advisors Act of 1940

February 7, 2014 SC 13G/A

PPO / / WADDELL & REED FINANCIAL INC - POLYPORE INTERNATIONAL, INC. Passive Investment

Polypore International, Inc. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Amendment No. 1* Polypore International, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 73179V103 (CUSIP Number) December 31, 2013 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate

February 7, 2014 EX-3

POWER OF ATTORNEY

Power of Attorney EXHIBIT 3 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, THAT: The undersigned, Waddell & Reed Financial, Inc.

January 30, 2014 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 www.polypore.net Celgard Files Patent Infringement Lawsuit against LG Chem, Ltd. CHARLOTTE, N.C., January 30, 2014 — Celgard, LLC (“Celgard”), a subsidiary of Polypore International, Inc. (NYSE: PPO), announced today that it has filed a complaint in the U.S. District Court of th

January 30, 2014 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 30, 2014 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commis

January 30, 2014 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 30, 2014 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commis

January 30, 2014 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 www.polypore.net Polypore Announces Long-Term Lithium Separator Supply Agreement with Samsung SDI Co., Ltd. CHARLOTTE, N.C., January 30, 2014 — Polypore International, Inc. (NYSE: PPO) today announced that its Celgard subsidiary and Samsung SDI Co., Ltd. (“Samsung”) have entered

January 10, 2014 CORRESP

-

January 10, 2014 Securities and Exchange Commission 100 F Street, NE Washington, DC 20549 Attention: Terence O’Brien Branch Chief Re: Polypore International, Inc.

December 27, 2013 EX-99.1

Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 [email protected] www.polypore.net

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 [email protected] www.polypore.net Polypore Announces Settlement and License Agreement with Sumitomo Chemical CHARLOTTE, N.C., December 27, 2013 — Polypore International, Inc. (NYSE: PPO) and Sumitomo Chemical Co., Ltd. have entered into a Settlement a

December 27, 2013 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 27, 2013 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commi

December 20, 2013 8-K

Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): December 19, 2013 POLYPORE INTERNATIONAL, INC.

December 3, 2013 CORRESP

-

December 3, 2013 Securities and Exchange Commission 100 F Street, NE Washington, DC 20549 Attention: Terence O’Brien Branch Chief Re: Polypore International, Inc.

November 5, 2013 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 28, 2013 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

November 4, 2013 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports Third Quarter 2013 Results · Separations Media and Transportation and Industrial segments generated solid performance · Electronics and Electric Drive Vehicle development progress

November 4, 2013 EX-99.1

(NYSE Listed: PPO) Robert W. Baird & Co. Industrial Conference November 2013

Exhibit 99.1 (NYSE Listed: PPO) Robert W. Baird & Co. Industrial Conference November 2013 2 Safe Harbor Statement These materials include "forward-looking statements". In these materials, the words “Polypore,” “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unless the context indicates otherwise. All statements other t

November 4, 2013 EX-99.1

(NYSE Listed: PPO) Third Quarter 2013 Supplemental Financial Information

Exhibit 99.1 (NYSE Listed: PPO) Third Quarter 2013 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

November 4, 2013 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 4, 2013 POLYPORE INTERNATIONAL, INC.

November 4, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 4, 2013 POLYPORE INTERNATIONAL, INC.

November 4, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 4, 2013 POLYPORE INTERNATIONAL, INC.

October 25, 2013 CORRESP

-

October 25, 2013 Securities and Exchange Commission 100 F Street, NE Washington, DC 20549 Attention: Terence O’Brien Branch Chief Re: Polypore International, Inc.

October 15, 2013 EX-99.1

1

EX-99.1 2 a13-222561ex99d1.htm EX-99.1 Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 [email protected] www.polypore.net FOR IMMEDIATE RELEASE Polypore Announces New President for Energy Storage — Transportation and Industrial Business Segment CHARLOTTE, N.C., October 15, 2013 — Polypore Internatio

October 15, 2013 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 15, 2013 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commis

October 10, 2013 SC 13G

PPO / / PRIMECAP MANAGEMENT CO/CA/ - SC 13G Passive Investment

OMB APPROVAL UNITED STATES OMB Number: 3235-0145 SECURITIES AND EXCHANGE COMMISSION Expires: February 28, 2009 Washington, D.

October 1, 2013 EX-99.1

STOCK PURCHASE AGREEMENT BY AND AMONG DARAMIC ACQUISITION CORP., POLYPORE BV POLYPORE INTERNATIONAL, INC. (SOLELY FOR PURPOSES OF SECTION 11.18) SEVEN MILE CAPITAL PARTNERS TOP, INC. SASR ZWEIUNDFÜNFZIGSTE BETEILIGUNGSVERWALTUNG GMBH Dated as of Sept

Exhibit 99.1 STOCK PURCHASE AGREEMENT BY AND AMONG DARAMIC ACQUISITION CORP., POLYPORE BV AND POLYPORE INTERNATIONAL, INC. (SOLELY FOR PURPOSES OF SECTION 11.18) AND SEVEN MILE CAPITAL PARTNERS TOP, INC. AND SASR ZWEIUNDFÜNFZIGSTE BETEILIGUNGSVERWALTUNG GMBH Dated as of September 27, 2013 TABLE OF CONTENTS Page ARTICLE 1 DEFINED TERMS 2 Section 1.1 Defined Terms 2 Section 1.2 Terms Defined Elsewhe

October 1, 2013 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 27, 2013 POLYPORE INTERNATIONAL, INC.

September 26, 2013 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 [email protected] www.polypore.net FOR IMMEDIATE RELEASE Polypore Files Application to Sell Microporous Business CHARLOTTE, NC., September 26, 2013 – Polypore International, Inc. (NYSE: PPO) announced today that it has filed an application with the Fed

September 26, 2013 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 26, 2013 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Comm

August 8, 2013 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 29, 2013 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

August 7, 2013 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports Second Quarter 2013 Results · Separations Media and Transportation and Industrial segments continued to deliver solid performance · Electronics and Electric Drive Vehicles (“EDVs”)

August 7, 2013 EX-99.1

(NYSE Listed: PPO) Second Quarter 2013 Supplemental Financial Information

Exhibit 99.1 (NYSE Listed: PPO) Second Quarter 2013 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

August 7, 2013 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 7, 2013 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commissi

August 7, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 7, 2013 POLYPORE INTERNATIONAL, INC.

August 7, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 7, 2013 POLYPORE INTERNATIONAL, INC.

August 7, 2013 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 [email protected] www.polypore.net FOR IMMEDIATE RELEASE Polypore Announces New President for Energy Storage - Electronics and Electric Drive Vehicles (EDVs) Business Segment CHARLOTTE, NC — August 7, 2013 — Polypore International, Inc. (NYSE: PPO) is

June 24, 2013 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 24, 2013 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commissio

June 24, 2013 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 [email protected] www.polypore.net PRESS RELEASE Polypore Comments on US Supreme Court Ruling Regarding Microporous CHARLOTTE, NC., June 24, 2013 (GLOBE NEWSWIRE) — Polypore International, Inc. (NYSE: PPO) announced today that the U.S. Supreme Court de

June 11, 2013 EX-99.1

(NYSE Listed: PPO) William Blair & Company Growth Stock Conference June 2013

Exhibit 99.1 (NYSE Listed: PPO) William Blair & Company Growth Stock Conference June 2013 2 Safe Harbor Statement These materials include "forward-looking statements". In these materials, the words “Polypore,” “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unless the context indicates otherwise. All statements other t

June 11, 2013 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

8-K 1 a13-1449318k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 11, 2013 POLYPORE INTERNATIONAL, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32

June 10, 2013 SC 13G/A

PPO / / WELLINGTON MANAGEMENT GROUP LLP - DISCLOSURE DOCUMENT Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Polypore International, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 73179V103 (CUSIP Number) May 31, 2013 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

May 17, 2013 8-K

Submission of Matters to a Vote of Security Holders - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 15, 2013 POLYPORE INTERNATIONAL, INC.

May 9, 2013 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 30, 2013 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

May 9, 2013 EX-10.1

TAX SHARING AGREEMENT

Exhibit 10.1 TAX SHARING AGREEMENT THIS AGREEMENT (this ?Agreement?) made and entered into as of May 13, 2004, by and among PP Holding Corporation II, a Delaware corporation (?PHC II?), PP Holding Corporation, a Delaware corporation and direct wholly owned subsidiary of PHC II (?PHC?), Polypore, Inc., a Delaware corporation and direct wholly owned subsidiary of PHC (?Polypore?), and such direct an

May 9, 2013 EX-10.2

POLYPORE INTERNATIONAL, INC. CHANGE IN CONTROL SEVERANCE AGREEMENT

Exhibit 10.2 POLYPORE INTERNATIONAL, INC. CHANGE IN CONTROL SEVERANCE AGREEMENT THIS CHANGE IN CONTROL SEVERANCE AGREEMENT (this “Agreement”), dated as of [DATE], is made and entered into by and between POLYPORE INTERNATIONAL, INC., a Delaware corporation (the “Company”), and [EXECUTIVE] (the “Executive”). RECITALS: I. The Executive is a senior executive of the Company or a Subsidiary and has made

May 8, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 8, 2013 POLYPORE INTERNATIONAL, INC.

May 8, 2013 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports First Quarter 2013 Results · Separations Media and Transportation and Industrial segments generate solid performance · Electronics and Electric Drive Vehicles (“EDVs”) segment expe

May 8, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 8, 2013 POLYPORE INTERNATIONAL, INC.

May 8, 2013 EX-99.1

(NYSE Listed: PPO) First Quarter 2013 Supplemental Financial Information

Exhibit 99.1 (NYSE Listed: PPO) First Quarter 2013 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

April 5, 2013 DEF 14A

- DEF 14A

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy S

March 13, 2013 EX-99.1

1 (NYSE Listed: PPO) BB&T Capital Markets Commercial & Industrial Conference March 2013

Exhibit 99.1 1 (NYSE Listed: PPO) BB&T Capital Markets Commercial & Industrial Conference March 2013 2 Safe Harbor Statement These materials include "forward-looking statements". In these materials, the words “Polypore,” “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unless the context indicates otherwise. All stateme

March 13, 2013 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 13, 2013 POLYPORE INTERNATIONAL, INC.

March 8, 2013 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net Polypore Announces Retirement of Mitch Pulwer CHARLOTTE, N.C., March 8, 2013 — Polypore International, Inc. (NYSE: PPO) said today that Mitchell J. Pulwer, President, Energy Storage-Electronics and Electric Driv

March 8, 2013 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 8, 2013 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commissio

February 26, 2013 EX-21.1

SUBSIDIARIES OF POLYPORE INTERNATIONAL, INC.

QuickLinks - Click here to rapidly navigate through this document Exhibit 21.1 SUBSIDIARIES OF POLYPORE INTERNATIONAL, INC. Name of Subsidiary State or jurisdiction of Incorporation or Organization Celgard Acquisition Corporation. Cayman Islands Celgard Korea, Limited South Korea Celgard, LLC Delaware Daramic Austria GmbH. Austria Daramic Battery Separator India Private Limited India Daramic Tianj

February 26, 2013 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 29, 2012 Or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 1-32266 Polypore International, Inc.

February 25, 2013 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 [email protected] www.polypore.net Celgard Files Patent Infringement Lawsuit CHARLOTTE, NC., February 25, 2013 (GLOBE NEWSWIRE) — Celgard, LLC (“Celgard”), a subsidiary of Polypore International, Inc. (NYSE: PPO), has filed a complaint in the U.S. Dist

February 25, 2013 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 25, 2013 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commi

February 20, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 20, 2013 POLYPORE INTERNATIONAL, INC.

February 20, 2013 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 20, 2013 POLYPORE INTERNATIONAL, INC.

February 20, 2013 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports Fourth Quarter and Full Year 2012 Results · Solid performance in the Separations Media and Transportation and Industrial segments · Fourth quarter 2012 reflects weak end-market dem

February 20, 2013 EX-99.1

(NYSE Listed: PPO) Fourth Quarter 2012 Supplemental Financial Information

Exhibit 99.1 (NYSE Listed: PPO) Fourth Quarter 2012 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

February 14, 2013 SC 13G

PPO / / GENERATION INVESTMENT MANAGEMENT LLP - SCHEDULE 13G HOLDINGS REPORT Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Polypore International, Inc.

February 14, 2013 SC 13G/A

PPO / / WELLINGTON MANAGEMENT GROUP LLP - DISCLOSURE DOCUMENT Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Polypore International, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 73179V103 (CUSIP Number) December 31, 2012 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 13, 2013 SC 13G

PPO / / VANGUARD GROUP INC Passive Investment

polyporeinternationalinc.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 0 )* Name of issuer: Polypore International Inc Title of Class of Securities: Common Stock CUSIP Number: 73179V103 Date of Event Which Requires Filing of this Statement: December 31, 2012 Check the

February 11, 2013 SC 13G/A

PPO / / AMERICAN CENTURY INVESTMENT MANAGEMENT INC - SCHEDULE 13G/A Passive Investment

United States Securities and Exchange Commission Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* POLYPORE INTERNATIONAL, INC. (Name of Issuer) COMMON STOCK (Title of Class of Securities) 73179V103 (CUSIP Number) DECEMBER 31, 2012 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 7, 2013 EX-1

JOINT FILING AGREEMENT

Joint Filing Agreement EXHIBIT 1 JOINT FILING AGREEMENT Waddell & Reed Financial, Inc.

February 7, 2013 SC 13G

PPO / / WADDELL & REED FINANCIAL INC - POLYPORE INTERNATIONAL, INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Polypore International, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 73179V103 (CUSIP Number) December 31, 2012 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is f

February 7, 2013 EX-2

EXHIBIT 2

Indentification and Classification of the Subsidiary Which Acquired the Security EXHIBIT 2 Waddell & Reed Investment Management Company—Tax ID No. 48-1106973 Investment Advisor registered under Section 203 of the Investment Advisors Act of 1940 Ivy Investment Management Company—Tax ID No. 03-0481447 Investment Advisor registered under Section 203 of the Investment Advisors Act of 1940

February 7, 2013 EX-3

POWER OF ATTORNEY

Power of Attorney EXHIBIT 3 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, THAT: The undersigned, Waddell & Reed Financial, Inc.

February 5, 2013 SC 13G/A

PPO / / BLAIR WILLIAM & CO/IL - SC 13G/A Passive Investment

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* POLYPORE INTERNATIONAL, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 73179V103 (CUSIP Number) December 31, 2012 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pur

January 11, 2013 CORRESP

-

January 11, 2013 Securities and Exchange Commission 100 F Street, NE Washington, DC 20549 Attention: Terence O’Brien Branch Chief Re: Polypore International, Inc.

December 28, 2012 S-8

- S-8

As Filed Electronically with the Securities and Exchange Commission on December 28, 2012 Registration No.

December 28, 2012 EX-4.1

POLYPORE INTERNATIONAL, INC. DEFERRED SAVINGS PLAN

Exhibit 4.1 POLYPORE INTERNATIONAL, INC. DEFERRED SAVINGS PLAN TABLE OF CONTENTS INTRODUCTION 1 1.01 Establishment and Name of Plan 1 1.02 Intent and Status of Plan 1 1.03 Purpose 1 DEFINITIONS 2 ELIGIBILITY AND PARTICIPATION 9 3.01 Participation 9 3.02 Termination of Participation 9 DEFERRED COMPENSATION ACCOUNTS 10 4.01 Deferred Compensation Account 10 4.02 Elective Deferral Amounts 10 4.03 Exce

December 28, 2012 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 27, 2012 POLYPORE INTERNATIONAL, INC.

November 2, 2012 EX-99.1

1 (NYSE Listed: PPO) Robert W. Baird Industrial Conference November 2012

Exhibit 99.1 1 (NYSE Listed: PPO) Robert W. Baird Industrial Conference November 2012 2 These materials include "forward-looking statements". In these materials, the words “Polypore,” “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unless the context indicates otherwise. All statements other than statements of historic

November 2, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 2, 2012 POLYPORE INTERNATIONAL, INC.

November 1, 2012 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 29, 2012 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

November 1, 2012 EX-3.1

POLYPORE INTERNATIONAL, INC. SECOND AMENDED AND RESTATED BYLAWS ARTICLE I OFFICES

Exhibit 3.1 POLYPORE INTERNATIONAL, INC. SECOND AMENDED AND RESTATED BYLAWS ARTICLE I OFFICES The registered office of Polypore International, Inc. (the ?Corporation?) in the State of Delaware shall be at 2711 Centerville Road, Suite 400, Wilmington, County of New Castle, Delaware 19808, and The Corporation Service Company will be the resident agent of the Corporation in charge thereof. The Corpor

October 30, 2012 EX-99.1

(NYSE Listed: PPO) Third Quarter 2012 Supplemental Financial Information

Exhibit 99.1 (NYSE Listed: PPO) Third Quarter 2012 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

October 30, 2012 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 30, 2012 POLYPORE INTERNATIONAL, INC.

October 30, 2012 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports Third Quarter 2012 Results · Third quarter performance consistent with updated outlook · Long-term growth trends remain positive · Weak economic environment weighing on micro- and

October 30, 2012 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 www.polypore.net PRESS RELEASE Polypore Appoints Christopher J. Kearney to Board of Directors CHARLOTTE, NC — October 30, 2012 — Polypore International, Inc. (NYSE: PPO) today announced that Christopher J. Kearney has been appointed to the Board of Directors,

October 30, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 30, 2012 POLYPORE INTERNATIONAL, INC.

October 30, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 30, 2012 POLYPORE INTERNATIONAL, INC.

October 29, 2012 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 29, 2012 POLYPORE INTERNATIONAL, INC.

October 29, 2012 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore to Assess Options for Its Daramic Facilities in Piney Flats, TN and Feistritz, Austria CHARLOTTE, NC — October 29, 2012 — Polypore International, Inc. (NYSE: PPO) today announced that the

September 12, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 12, 2012 POLYPORE INTERNATIONAL, INC.

September 12, 2012 EX-99.1

© 2012 Polypore International, Inc. Welcome to Investor Day 2012 ROBERT TOTH President & Chief Executive Officer September 12, 2012

Exhibit 99.1 © 2012 Polypore International, Inc. Welcome to Investor Day 2012 ROBERT TOTH President & Chief Executive Officer September 12, 2012 Safe Harbor Statement 2 © 2012 Polypore International, Inc. These materials include "forward-looking statements". In these materials, the words “Polypore,” “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. tog

September 11, 2012 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 11, 2012 POLYPORE INTERNATIONAL, INC.

September 11, 2012 EX-99.1

1

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Announces Investor Day Agenda and Provides Updated Financial Outlook CHARLOTTE, NC — September 11, 2012 — Polypore International, Inc. (NYSE: PPO) will host an investor meeting and tours o

September 10, 2012 SC 13G

PPO / / WELLINGTON MANAGEMENT GROUP LLP - DISCLOSURE DOCUMENT Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Polypore International, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 73179V103 (CUSIP Number) August 31, 2012 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which th

August 2, 2012 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2012 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

August 2, 2012 EX-10.1

CREDIT AGREEMENT POLYPORE INTERNATIONAL, INC., as Borrower, The Several Lenders from Time to Time Parties Hereto, BBVA COMPASS BANK, PNC BANK, NATIONAL ASSOCIATION, HSBC BANK USA, NATIONAL ASSOCIATION and FIFTH THIRD BANK, as Co-Documentation Agents,

Exhibit 10.1 EXECUTION VERSION CREDIT AGREEMENT among POLYPORE INTERNATIONAL, INC., as Borrower, The Several Lenders from Time to Time Parties Hereto, BBVA COMPASS BANK, PNC BANK, NATIONAL ASSOCIATION, HSBC BANK USA, NATIONAL ASSOCIATION and FIFTH THIRD BANK, as Co-Documentation Agents, BANK OF AMERICA, N.A. and WELLS FARGO BANK, NATIONAL ASSOCIATION, as Syndication Agents, and JPMORGAN CHASE BANK

July 31, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 31, 2012 POLYPORE INTERNATIONAL, INC.

July 31, 2012 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports Second Quarter 2012 Results CHARLOTTE, NC – July 31, 2012 – Polypore International, Inc. (NYSE: PPO) today reported its financial results for the second quarter ended June 30, 2012

July 31, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 31, 2012 POLYPORE INTERNATIONAL, INC.

July 31, 2012 EX-99.1

(NYSE Listed: PPO) Second Quarter 2012 Supplemental Financial Information

Exhibit 99.1 (NYSE Listed: PPO) Second Quarter 2012 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

July 11, 2012 EX-99.1

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Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Comments on Court of Appeals’ Ruling Regarding Microporous CHARLOTTE, NC., July 11, 2012 — Polypore International, Inc. (NYSE: PPO) today announced that the 11th Circuit Court of Appeals h

July 11, 2012 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 11, 2012 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commissio

July 3, 2012 8-K

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 29, 2012 POLYPORE INTERNATIONAL, INC.

June 7, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 7, 2012 POLYPORE INTERNATIONAL, INC. (Exact name of Registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 1-32266 43-2049334 (Commission

June 7, 2012 EX-99.1

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Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Announces Intention to Refinance Senior Credit Facility CHARLOTTE, NC — June 7, 2012 — Polypore International, Inc. (“Polypore”) (NYSE:PPO) announces its intention to replace its existing

June 5, 2012 EX-99.1

1 (NYSE Listed: PPO) William Blair & Company Annual Growth Stock Conference June 2012

Exhibit 99.1 1 (NYSE Listed: PPO) William Blair & Company Annual Growth Stock Conference June 2012 2 These materials include "forward-looking statements". In these materials, the words “Polypore,” “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unless the context indicates otherwise. All statements other than statement

June 5, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 5, 2012 POLYPORE INTERNATIONAL, INC.

May 11, 2012 8-K

Submission of Matters to a Vote of Security Holders - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 9, 2012 POLYPORE INTERNATIONAL, INC.

May 3, 2012 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2012 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

May 3, 2012 EX-99.1

1 (NYSE Listed: PPO) Robert W. Baird Growth Stock Conference May 2012 © 2012 Polypore International, Inc.

Exhibit 99.1 1 (NYSE Listed: PPO) Robert W. Baird Growth Stock Conference May 2012 © 2012 Polypore International, Inc. 2 These materials include "forward-looking statements". In these materials, the words “Polypore,” “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unless the context indicates otherwise. All statements

May 3, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 3, 2012 POLYPORE INTERNATIONAL, INC.

May 2, 2012 EX-99.1

Three Months Ended

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 N. Community House Rd, Suite 350 Charlotte, NC 28277 Tel: (704) 587-8886 [email protected] www.polypore.net PRESS RELEASE Polypore Reports First Quarter 2012 Results CHARLOTTE, NC — May 2, 2012 — Polypore International, Inc. (NYSE: PPO) today reported its financial results for the first quarter ended March 31, 2012. F

May 2, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 2, 2012 POLYPORE INTERNATIONAL, INC.

May 2, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 2, 2012 POLYPORE INTERNATIONAL, INC.

May 2, 2012 EX-99.1

(NYSE Listed: PPO) First Quarter 2012 Supplemental Financial Information

Exhibit 99.1 (NYSE Listed: PPO) First Quarter 2012 Supplemental Financial Information These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular,

April 9, 2012 DEF 14A

- DEF 14A

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 15, 2012 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 14, 2012 POLYPORE INTERNATIONAL, INC.

March 12, 2012 SC 13G/A

PPO / / WELLS FARGO & COMPANY/MN Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1) POLYPORE INTL INC (Name of Issuer) COM (Title of Class of Securities) 73179V103 (CUSIP Number) February 29, 2012 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is fil

March 12, 2012 8-K

Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 12, 2012 POLYPORE INTERNATIONAL, INC.

March 2, 2012 CORRESP

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Correspondence January 20, 2012 Securities and Exchange Commission 100 F Street, NE Washington, DC 20549 Attention: Terence O’Brien Branch Chief Re: Polypore International, Inc.

February 27, 2012 EX-10.11

POLYPORE INTERNATIONAL, INC. 2007 STOCK INCENTIVE PLAN (Amended and Restated Effective as of November 30, 2011)

Exhibit 10.11 POLYPORE INTERNATIONAL, INC. 2007 STOCK INCENTIVE PLAN (Amended and Restated Effective as of November 30, 2011) 1. Purpose and Effective Date. (a) Purpose of the Plan. The purpose of the Plan is to assist the Company in attracting, retaining, motivating and rewarding certain key employees, officers, directors and consultants of the Company and its Affiliates, and promoting the creati

February 27, 2012 EX-21.1

SUBSIDIARIES OF POLYPORE INTERNATIONAL, INC.

QuickLinks - Click here to rapidly navigate through this document Exhibit 21.1 SUBSIDIARIES OF POLYPORE INTERNATIONAL, INC. Name of Subsidiary State or jurisdiction of Incorporation or Organization Polypore Hong Kong, Limited Hong Kong Celgard Acquisition Corporation Cayman Islands Celgard Korea, Inc. South Korea Celgard, LLC Delaware Daramic Austria GmbH Austria Daramic Tianjin PE Separator Co.,

February 27, 2012 EX-99.1

www.CallStreet.com · 1-877-FACTSET · Copyright © 2001-2012 CallStreet

Exhibit 99.1 corrected transcript Polypore International, Inc. PPO Q4 2011 Earnings Call Feb. 23, 2012 Companyp Tickerp Event Typep Datep · PARTICIPANTS Corporate Participants Robert B. Toth — Chairman, President & Chief Executive Officer Lynn K. Amos — Chief Financial Officer, Secretary & Treasurer Robert Whitsett — Vice President, Finance, Polypore International, Inc. Other Participants Michael

February 27, 2012 EX-10.13

OPTION GRANT NOTICE AND AGREEMENT

Exhibit 10.13 OPTION GRANT NOTICE AND AGREEMENT Polypore International, Inc. (the ?Company?), pursuant to its 2007 Stock Incentive Plan (amended and restated effective as of November 15, 2011) (the ?Plan?), hereby grants to Holder Options to purchase the number of shares of Stock set forth below. The Options are subject to all of the terms and conditions as set forth herein, as well as the terms a

February 27, 2012 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K

Use these links to rapidly review the document TABLE OF CONTENTS Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2011 Or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 1-32266 Polypore International, Inc.

February 27, 2012 EX-99.1

corrected transcript

Exhibit 99.1 corrected transcript Polypore International, Inc. PPO Lithium Battery Separator Industry Call Feb. 3, 2012 Company▲ Ticker▲ Event Type▲ Date▲ · PARTICIPANTS Corporate Participants Robert B. Toth — Chairman, President & Chief Executive Officer Lynn K. Amos — Chief Financial Officer, Secretary & Treasurer Dr. John Zhang — Chief Technical Officer, Celgard, LLC · MANAGEMENT DISCUSSION SEC

February 27, 2012 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 3, 2012 POLYPORE INTERNATIONAL, INC.

February 27, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 23, 2012 POLYPORE INTERNATIONAL, INC.

February 22, 2012 EX-99.1

Polypore Reports Fourth Quarter and Full Year 2011 Results

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 North Community House Road Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 Fax: (704) 587-8795 www.polypore.net Polypore Reports Fourth Quarter and Full Year 2011 Results 2011 Highlights: · Sales increase 24% to $763.1 million · Adjusted EBITDA increases 36% to $250.8 million · Adjusted EPS increases 71% to $2.34 Fourth Quarter

February 22, 2012 EX-99.1

(NYSE Listed: PPO) Fourth Quarter 2011 Supplemental Financial Information

EX-99.1 2 a12-55642ex99d1.htm EX-99.1 Exhibit 99.1 (NYSE Listed: PPO) Fourth Quarter 2011 Supplemental Financial Information 2 These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-look

February 22, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 a12-556428k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 22, 2012 POLYPORE INTERNATIONAL, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware (State or Other Jurisdiction of Incorporation) 1

February 22, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 22, 2012 POLYPORE INTERNATIONAL, INC.

February 10, 2012 CORRESP

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Correspondence February 10, 2012 Securities and Exchange Commission 100 F Street, NE Washington, DC 20549 Attention: Terence O’ Brien Branch Chief Re: Polypore International, Inc.

February 10, 2012 SC 13G

PPO / / AMERICAN CENTURY INVESTMENT MANAGEMENT INC - SCHEDULE 13G Passive Investment

United States Securities and Exchange Commission Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* POLYPORE INTERNATIONAL, INC. (Name of Issuer) COMMON STOCK (Title of Class of Securities) 73179V103 (CUSIP Number) DECEMBER 31, 2011 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 3, 2012 EX-99.1

Polypore International, Inc.

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 North Community House Road Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 Fax: (704) 587-8795 www.polypore.net Polypore to Host Investor Call on the Lithium Battery Separator Industry CHARLOTTE, N.C., Feb. 3, 2012 (GLOBE NEWSWIRE) — Polypore International, Inc. (NYSE:PPO) will host an investor call that will focus on facts in t

February 3, 2012 EX-99.2

(NYSE Listed: PPO) Robert Toth, President & Chief Executive Officer Lynn Amos, Chief Financial Officer Dr. John Zhang, Chief Technical Officer, Celgard, LLC

Exhibit 99.2 (NYSE Listed: PPO) Robert Toth, President & Chief Executive Officer Lynn Amos, Chief Financial Officer Dr. John Zhang, Chief Technical Officer, Celgard, LLC 2 These materials include "forward-looking statements". In these materials, the words “Polypore,” “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unle

February 3, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 3, 2012 POLYPORE INTERNATIONAL, INC.

January 31, 2012 EX-99.1

Polypore Issues Statement

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 North Community House Road Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 Fax: (704) 587-8795 www.polypore.net Polypore Issues Statement CHARLOTTE, NC — January 31, 2012 — Polypore International, Inc. (NYSE: PPO) issued the following statement from Robert B. Toth, President and Chief Executive Officer: “Typically, the company d

January 31, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 31, 2012 POLYPORE INTERNATIONAL, INC.

January 30, 2012 SC 13G

PPO / / BLAIR WILLIAM & CO/IL - NONE Passive Investment

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. n/a )* POLYPORE INTERNATIONAL, INC. (Name of Issuer) Common (Title of Class of Securities) 73179V103 (CUSIP Number) December 31, 2011 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

January 26, 2012 SC 13G

PPO / / WELLS FARGO & COMPANY/MN Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ) POLYPORE INTL INC (Name of Issuer) COM (Title of Class of Securities) 73179V103 (CUSIP Number) December 31, 2011 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is file

January 6, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 6, 2012 POLYPORE INTERNATIONAL, INC.

January 6, 2012 EX-99.1

1 (NYSE Listed: PPO) 14th Annual Needham Growth Conference January 2012

Exhibit 99.1 1 (NYSE Listed: PPO) 14th Annual Needham Growth Conference January 2012 2 These materials include "forward-looking statements". In these materials, the words “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unless the context indicates otherwise. All statements other than statements of historical facts incl

December 19, 2011 CORRESP

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Correspondence December 19, 2011 Securities and Exchange Commission 100 F Street, NE Washington, DC 20549 Attention: Terence O’Brien Branch Chief Re: Polypore International, Inc.

November 14, 2011 CORRESP

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Correspondence November 14, 2011 Securities and Exchange Commission 100 F Street, NE Washington, DC 20549 Attention: Terence O’Brien Branch Chief Re: Polypore International, Inc.

November 4, 2011 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended October 1, 2011 Or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number: 1-32266 POLYPORE INTERNATIONAL, INC.

November 3, 2011 EX-99.1

1 (NYSE Listed: PPO) Robert W. Baird & Co. 2011 Industrial Conference November 2011

Exhibit 99.1 1 (NYSE Listed: PPO) Robert W. Baird & Co. 2011 Industrial Conference November 2011 2 These materials include "forward-looking statements". In these materials, the words “Polypore International,” “Company,” “we,” “us” and “our” refer to Polypore International, Inc. together with its subsidiaries, unless the context indicates otherwise. All statements other than statements of historica

November 3, 2011 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 3, 2011 POLYPORE INTERNATI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 3, 2011 POLYPORE INTERNATIONAL, INC.

November 2, 2011 EX-99.1

Polypore International, Inc. The Gibson Building 11430 North Community House Road Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 Fax: (704) 587-8795 www.polypore.net Polypore Reports Third Quarter 2011 Results

Exhibit 99.1 Polypore International, Inc. The Gibson Building 11430 North Community House Road Suite 350 Charlotte, NC 28277 Tel: (704) 587-8409 Fax: (704) 587-8795 www.polypore.net Polypore Reports Third Quarter 2011 Results · Sales increase 25% to $190.1 million · Adjusted EBITDA increases 40% to $59.5 million · Adjusted EPS increases 93% to $0.54 CHARLOTTE, NC — November 2, 2011 — Polypore Inte

November 2, 2011 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 2, 2011 POLYPORE INTERNATI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 2, 2011 POLYPORE INTERNATIONAL, INC.

November 2, 2011 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 2, 2011 POLYPORE INTERNATI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 2, 2011 POLYPORE INTERNATIONAL, INC.

November 2, 2011 EX-99.1

(NYSE Listed: PPO) Third Quarter 2011 Supplemental Financial Information

Exhibit 99.1 (NYSE Listed: PPO) Third Quarter 2011 Supplemental Financial Information 2 These materials include "forward-looking statements." All statements other than statements of historical facts included in these materials that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements including, in particular

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