WLKP / Westlake Chemical Partners LP - Limited Partnership - Документы SEC, Годовой отчет, Доверенное заявление

Westlake Chemical Partners LP - Товарищество с ограниченной ответственностью
US ˙ NYSE ˙ US9604171036

Основная статистика
LEI 5493001UJXZP4TJUQM76
CIK 1604665
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 Westlake Chemical Partners LP - Limited Partnership
SEC Filings (Chronological Order)
На этой странице представлен полный хронологический список документов SEC, за исключением документов о собственности, которые мы предоставляем в других местах.
August 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partner

August 5, 2025 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Second Quarter 2025 Results •Declared quarterly distribution of $0.4714 per unit; 44th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribu

August 5, 2025 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 5, 2025 Westlake Chemical

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 5, 2025 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commi

May 2, 2025 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): May 2, 2025 Westlake Chemical Par

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 2, 2025 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commissi

May 2, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partne

May 2, 2025 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces First Quarter 2025 Results •Declared quarterly distribution of $0.4714 per unit; 43rd consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribut

March 5, 2025 EX-21.1

List of Subsidiaries of Westlake Chemical Partners LP.

EXHIBIT 21.1 SUBSIDIARIES OF WESTLAKE CHEMICAL PARTNERS LP Name of Subsidiary Jurisdiction Westlake Chemical OpCo GP LLC Delaware Westlake Chemical OpCo LP Delaware

March 5, 2025 EX-19

Insider Trading Policy

EXHIBIT 19 WESTLAKE CHEMICAL PARTNERS LP Insider Trading Policy Revised and effective as of May 10, 2023 I.

March 5, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SE

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Ch

February 24, 2025 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Fourth Quarter and Full Year 2024 Results •Declared quarterly distribution of $0.4714 per unit; 42nd consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net

February 24, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 24, 2025 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Co

November 6, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Pa

November 5, 2024 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): November 5, 2024 Westlake Chemica

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): November 5, 2024 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Com

November 5, 2024 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Third Quarter 2024 Results •Celebrated 10th anniversary as a publicly traded master limited partnership having grown the quarterly distribution 71% since IPO •Declared quarterly distribution of $0.4714 per unit; 41st consecutive quarterly dis

August 9, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partner

August 6, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 6, 2024 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commi

August 6, 2024 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Second Quarter 2024 Results •Declared quarterly distribution of $0.4714 per unit; 40th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribu

July 15, 2024 8-K

Current Report

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 15, 2024 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commis

July 15, 2024 EX-99.1

Westlake Chemical Partners Implements Succession Plan Jean-Marc Gilson, Experienced Chemicals Industry Executive, Appointed Director, President and CEO Albert Chao and James Chao to Remain Actively Engaged as Executive Chairman and Senior Chairman of

Exhibit 99.1 Westlake Chemical Partners Implements Succession Plan Jean-Marc Gilson, Experienced Chemicals Industry Executive, Appointed Director, President and CEO Albert Chao and James Chao to Remain Actively Engaged as Executive Chairman and Senior Chairman of the Board, Respectively HOUSTON, July 15, 2024 – Westlake Chemical Partners GP LLC, the general partner of Westlake Chemical Partners LP

May 10, 2024 S-8 POS

As filed with the Securities and Exchange Commission on May 10, 2024

As filed with the Securities and Exchange Commission on May 10, 2024 Registration No.

May 8, 2024 8-K

Current Report

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, 2024 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commissi

May 2, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partne

May 1, 2024 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces First Quarter 2024 Results •Declared quarterly distribution of $0.4714 per unit; 39th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribut

May 1, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 1, 2024 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commissi

March 18, 2024 DEF 14A

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

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 ☒ 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 Proxy St

March 18, 2024 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

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 ☒ 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 Proxy S

February 28, 2024 EX-21.1

List of Subsidiaries of Westlake Chemical Partners LP.

EXHIBIT 21.1 SUBSIDIARIES OF WESTLAKE CHEMICAL PARTNERS LP Name of Subsidiary Jurisdiction Westlake Chemical OpCo GP LLC Delaware Westlake Chemical OpCo LP Delaware

February 28, 2024 EX-97

Westlake Chemical Partners LP Policy for Recovery of Erroneously Awarded Compensation, effective as of October 2, 2023.

EXHIBIT 97 Westlake Chemical Partners LP (the “Partnership”) has adopted this Policy for Recovery of Erroneously Awarded Compensation (the “Policy”), effective as of October 2, 2023 (the “Effective Date”).

February 28, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SE

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Ch

February 20, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 20, 2024 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Co

February 20, 2024 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Fourth Quarter and Full Year 2023 Results •Declared quarterly distribution of $0.4714 per unit; 38th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net

February 14, 2024 SC 13G/A

WLKP / Westlake Chemical Partners LP - Limited Partnership / Energy Income Partners, LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm246251d3sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 4)* Westlake Chemical Partners, LP (Name of Issuer) Common Units (Title of Class of Securities) 960417

February 14, 2024 SC 13D/A

WLKP / Westlake Chemical Partners LP - Limited Partnership / TTWF LP Activist Investment

SC 13D/A 1 ff301111813da1-westlake.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 Amendment No. 1 WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) COMMON UNITS REPRESENTING LIMITED PARTNER INTERESTS, NO PAR VALUE (Title of Class of Securities) 960417103 (CUSIP Number) February 14, 2024 (Date of Event which Requires F

February 12, 2024 SC 13G/A

WLKP / Westlake Chemical Partners LP - Limited Partnership / Invesco Ltd. - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5 )* Westlake Chemical Partners LP (Name of Issuer) Partnership Interest (Title of Class of Securities) 960417103 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the

November 2, 2023 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Third Quarter 2023 Results •Declared quarterly distribution of $0.4714 per unit; 37th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribut

November 2, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Pa

November 2, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 2, 2023 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Com

August 3, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partner

August 3, 2023 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 3, 2023 Westlake Chemical

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 3, 2023 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commi

August 3, 2023 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Second Quarter 2023 Results •Declared quarterly distribution of $0.4714 per unit; 36th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribu

May 4, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partne

May 4, 2023 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces First Quarter 2023 Results •Declared quarterly distribution of $0.4714 per unit; 35th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribut

May 4, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 4, 2023 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commissi

April 27, 2023 EX-99.1

Westlake Chemical Partners Appoints Lisa Friel to Board of Directors

EX-99.1 EXHIBIT 99.1 For Further Information Contact: Media Relations – L. Ben Ederington – 713.585.2900 Investor Relations – Steve Bender – 713.585.2900 Westlake Chemical Partners Appoints Lisa Friel to Board of Directors HOUSTON, April 27, 2023 – Westlake Chemical Partners (NYSE: WLKP) today announced that Ms. Lisa A. Friel has been appointed to the board of directors of its general partner, Wes

April 27, 2023 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 27, 2023 Westlake Chemical

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 27, 2023 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commi

March 16, 2023 CORRESP

[Signature Page Follows]

CORRESP VIA EDGAR March 16, 2023 United States Securities and Exchange Commission Division of Corporation Finance Office of Energy and Transportation 100 F.

March 7, 2023 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): March 3, 2023 Westlake Chemical P

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 3, 2023 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commis

March 1, 2023 EX-21.1

List of Subsidiaries of Westlake Chemical Partners LP.

EXHIBIT 21.1 SUBSIDIARIES OF WESTLAKE CHEMICAL PARTNERS LP Name of Subsidiary Jurisdiction Westlake Chemical OpCo GP LLC Delaware Westlake Chemical OpCo LP Delaware

March 1, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Westlake Chemical Partners, LP Westlake Finance Corp.

March 1, 2023 10-K

Form 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Ch

March 1, 2023 S-3

Powers of Attorney (contained on signature pages).

S-3 Table of Contents As filed with the Securities and Exchange Commission on March 1, 2023 Registration No.

February 21, 2023 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 21, 2023 Westlake Chemic

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 21, 2023 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Co

February 21, 2023 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Fourth Quarter 2022 Results •Declared quarterly distribution of $0.4714 per unit; 34th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribu

February 14, 2023 SC 13G/A

WLKP / Westlake Chemical Partners LP / Energy Income Partners, LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm236636d3sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 3)* Westlake Chemical Partners, LP (Name of Issuer) Common Units (Title of Class of Securities) 960417

February 10, 2023 SC 13G/A

WLKP / Westlake Chemical Partners LP / Invesco Ltd. - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 )* Westlake Chemical Partners LP (Name of Issuer) Partnership Interest (Title of Class of Securities) 960417103 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the

January 23, 2023 SC 13G/A

WLKP / Westlake Chemical Partners LP / WPT LLC - 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. 08)* Westlake Chemical Partners LP (Name of Issuer) Common Units Representing Limited Partner Interests, No Par Value (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statemen

January 23, 2023 EX-99.1

[Signature Page—Schedule 13G Joint Filing Agreement]

EX-99.1 2 ex991.htm EX-99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k)(1)(iii) of the Securities Exchange Act of 1934, each of the undersigned agrees that a single joint Schedule 13G/A and any further amendments thereto may be filed on behalf of each of the undersigned with respect to the common units held by each of them in Westlake Chemical Partners LP. Dated: January 20, 2023

November 3, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 3, 2022 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Com

November 3, 2022 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact?(713) 585-2900 Investors?Steve Bender Media?L. Benjamin Ederington Westlake Chemical Partners LP Announces Third Quarter 2022 Results ?Declared quarterly distribution of $0.4714 per unit; 33rd consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribut

November 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Pa

August 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partner

August 2, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 2, 2022 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commi

August 2, 2022 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact?(713) 585-2900 Investors?Steve Bender Media?L. Benjamin Ederington Westlake Chemical Partners LP Announces Second Quarter 2022 Results ?Declared quarterly distribution of $0.4714 per unit; 32nd consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribu

July 15, 2022 EX-10.1

Amendment No. 2 to the Amended And Restated Senior Unsecured Revolving Credit Agreement of Westlake Chemical OpCo LP (incorporated by reference to Exhibit 10.1 to Westlake Chemical Partners LP's Current Report on Form 8-K (File No. 001-36567) filed on July 15, 2022).

Exhibit 10.1 SECOND AMENDMENT TO AMENDED AND RESTATED SENIOR UNSECURED REVOLVING CREDIT AGREEMENT This SECOND AMENDMENT TO AMENDED AND RESTATED SENIOR UNSECURED REVOLVING CREDIT AGREEMENT (this ?Amendment?) is made and entered into as of July 12, 2022, by and among WESTLAKE CHEMICAL OPCO LP, a Delaware limited partnership (?Borrower?), as borrower, WESTLAKE POLYMERS LLC, a Delaware limited liabili

July 15, 2022 EX-10.2

Amendment No. 4 to the Senior Unsecured Revolving Credit Agreement of Westlake Chemical Partners LP (incorporated by reference to Exhibit 10.2 to Westlake Chemical Partners LP's Current Report on Form 8-K (File No. 001-36567) filed on July 15, 2022).

Exhibit 10.2 FOURTH AMENDMENT TO SENIOR UNSECURED REVOLVING CREDIT AGREEMENT This FOURTH AMENDMENT TO SENIOR UNSECURED REVOLVING CREDIT AGREEMENT (this ?Amendment?) is made and entered into as of July 12, 2022, by and among WESTLAKE CHEMICAL PARTNERS LP, a Delaware limited partnership (?Borrower?), as borrower and WESTLAKE CHEMICAL FINANCE CORPORATION, a Delaware corporation (?Lender?), as lender.

July 15, 2022 8-K

Entry into a Material Definitive Agreement, 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): July 12, 2022 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commis

May 31, 2022 144

EXPLANATION OF RESPONSES: REMARKS:

UNITED STATES OMB APPROVAL SECURITIES AND EXCHANGE COMMISSION OMB Number: 3235-0101 Washington, D.

May 4, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partne

May 3, 2022 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact?(713) 585-2900 Investors?Steve Bender Media?L. Benjamin Ederington Westlake Chemical Partners LP Announces First Quarter 2022 Results ?Declared quarterly distribution of $0.4714 per unit; 31st consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribut

May 3, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 3, 2022 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commissi

March 2, 2022 EX-21.1

List of Subsidiaries of Westlake Chemical Partners LP.

EXHIBIT 21.1 SUBSIDIARIES OF WESTLAKE CHEMICAL PARTNERS LP Name of Subsidiary Jurisdiction Westlake Chemical OpCo GP LLC Delaware Westlake Chemical OpCo LP Delaware

March 2, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2021 or ☐ TRANSITION REPORT PURSUANT TO SE

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Ch

February 22, 2022 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact?(713) 585-2900 Investors?Steve Bender Media?L. Benjamin Ederington Westlake Chemical Partners LP Announces Record Fourth Quarter and Full Year 2021 Results ?Declared quarterly distribution of $0.4714 per unit; 30th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today report

February 22, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 22, 2022 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Co

February 14, 2022 SC 13G/A

WLKP / Westlake Chemical Partners LP / Energy Income Partners, LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO ? 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO ? 240.13d-2 (Amendment No. 2)* Westlake Chemical Partners, LP (Name of Issuer) Common Units (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2021 (Dat

February 11, 2022 SC 13G/A

WLKP / Westlake Chemical Partners LP / Invesco Ltd. - SEC 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. 3 )* Westlake Chemical Partners LP (Name of Issuer) Partnership Interest (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

January 21, 2022 EX-99.1

[Signature Page—Schedule 13G Joint Filing Agreement]

EXHIBIT 99.1 JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k)(1)(iii) of the Securities Exchange Act of 1934, each of the undersigned agrees that a single joint Schedule 13G/A and any further amendments thereto may be filed on behalf of each of the undersigned with respect to the common units held by each of them in Westlake Chemical Partners LP. Dated: January 21, 2022 WPT LLC By: /s/ ALBERT CHAO

January 21, 2022 SC 13G/A

WLKP / Westlake Chemical Partners LP / WPT LLC - NONE Passive Investment

SC 13G/A 1 doc1.htm NONE UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7)* Westlake Chemical Partners LP (Name of Issuer) Common Units Representing Limited Partner Interests, No Par Value (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of th

November 3, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Pa

November 2, 2021 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact?(713) 585-2900 Investors?Steve Bender Media?L. Benjamin Ederington Westlake Chemical Partners LP Announces Third Quarter 2021 Results ?Declared quarterly distribution of $0.4714 per unit; 29th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attribut

November 2, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 2, 2021 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Com

August 4, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partner

August 3, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 3, 2021 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commi

August 3, 2021 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact?(713) 585-2900 Investors?Steve Bender Media?L. Benjamin Ederington Westlake Chemical Partners LP Announces Second Quarter 2021 Results ?Record quarterly net income of $25.1 million, an increase of 68% compared to second quarter 2020 ?Declared quarterly distribution of $0.4714 per unit; 28th consecutive quarterly distribution HOUSTON-(BUSINESS WIRE

May 5, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partne

May 4, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 4, 2021 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commissi

May 4, 2021 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact?(713) 585-2900 Investors?Steve Bender Media?L. Benjamin Ederington Westlake Chemical Partners LP Announces First Quarter 2021 Results ? Declared quarterly distribution of $0.4714 per unit; 27th consecutive quarterly distribution ? Ethylene sales agreement benefits Westlake Partners, providing predictable cash flows HOUSTON-(BUSINESS WIRE)-Westlake

March 2, 2021 10-K

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2020 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Ch

March 2, 2021 EX-21.1

List of Subsidiaries of Westlake Chemical Partners LP.

EXHIBIT 21.1 SUBSIDIARIES OF WESTLAKE CHEMICAL PARTNERS LP Name of Subsidiary Jurisdiction Westlake Chemical OpCo GP LLC Delaware Westlake Chemical OpCo LP Delaware

February 23, 2021 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Fourth Quarter and Full Year 2020 Results •Record annual net income attributable to the Partnership of $66.2 million •Declared quarterly distribution of $0.4714 per unit; 26th consecutive quarterly distribution to our unitholders HOUSTON-(BUS

February 23, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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, 2021 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Co

February 16, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendme

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO ? 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO ? 240.13d-2 (Amendment No. 1)* Westlake Chemical Partners, LP (Name of Issuer) Common Units (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2020 (Dat

February 16, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendme

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO ? 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO ? 240.13d-2 (Amendment No. 1)* Westlake Chemical Partners, LP (Name of Issuer) Common Units (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2020 (Dat

February 12, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* Westlake Chemical Partners LP (Name of Issuer) Partnership Interest (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

January 15, 2021 EX-99.1

[Signature Page—Schedule 13G Joint Filing Agreement]

EXHIBIT 99.1 JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k)(1)(iii) of the Securities Exchange Act of 1934, each of the undersigned agrees that a single joint Schedule 13G/A and any further amendments thereto may be filed on behalf of each of the undersigned with respect to the common units held by each of them in Westlake Chemical Partners LP. Dated: January 15, 2021 WPT LLC By: /s/ ALBERT CHAO

January 15, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6)* Westlake Chemical Partners LP (Name of Issuer) Common Units Representing Limited Partner Interests, No P

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6)* Westlake Chemical Partners LP (Name of Issuer) Common Units Representing Limited Partner Interests, No Par Value (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement

November 4, 2020 EX-33.1

Rule 13a – 14(a) / 15d – 14(a) Certification (Principal Executive Officer)

Exhibit 31.1 CERTIFICATIONS I, Albert Chao, certify that: 1. I have reviewed this Quarterly Report on Form 10-Q of Westlake Chemical Partners LP; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading wit

November 4, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Pa

November 3, 2020 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Third Quarter 2020 Results •Maintained quarterly distribution of $0.4714 per unit with a 1.13x trailing twelve-month distribution coverage; 25th consecutive quarterly distribution to our unitholders HOUSTON-(BUSINESS WIRE)-Westlake Chemical P

November 3, 2020 8-K

Regulation FD Disclosure, 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): November 3, 2020 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Com

September 8, 2020 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 8, 2020 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Co

September 8, 2020 EX-99.1

Westlake Chemical Partners Updates Statement on Lake Charles Operations

Exhibit 99.1 Westlake Chemical Partners Updates Statement on Lake Charles Operations HOUSTON - Sept. 8, 2020 - Westlake Chemical Partners LP (NYSE: WLKP) today issued a statement updating the impact of Hurricane Laura, which made landfall near plants in the Lake Charles, Louisiana area owned by Westlake Chemical OpCo LP (“OpCo”), in which the Partnership owns a 22.8% interest. In the aftermath of

August 28, 2020 EX-99.1

Westlake Chemical Partners Issues Statement on Lake Charles Operations

Exhibit 99.1 Westlake Chemical Partners Issues Statement on Lake Charles Operations HOUSTON - August 27, 2020 - Westlake Chemical Partners LP (NYSE: WLKP) today issued a statement regarding Hurricane Laura, which made landfall near plants in the Lake Charles, Louisiana area owned by Westlake Chemical OpCo LP (“OpCo”), in which the Partnership owns a 22.8% interest. The Partnership’s primary concer

August 28, 2020 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 27, 2020 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Comm

August 6, 2020 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Second Quarter 2020 Results •Maintained quarterly distribution of $0.4714 per unit with a 1.13x trailing twelve-month distribution coverage HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported

August 6, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partner

August 6, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 6, 2020 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commi

May 6, 2020 EX-10.1

Third Amendment to Senior Unsecured Revolving Credit Agreement by and between Westlake Chemical Partners LP, as borrower, and Westlake Chemical Finance Corporation, as lender, dated as of March 19, 2020 (incorporated herein by reference to Exhibit 10.1 to Westlake Chemical Partners LP's Quarterly Report on Form 10-Q for the quarter ended March 31, 2020, filed on May 6, 2020, File No. 001-36567).

EXHIBIT 10.1 THIRD AMENDMENT TO SENIOR UNSECURED REVOLVING CREDIT AGREEMENT This THIRD AMENDMENT TO SENIOR UNSECURED REVOLVING CREDIT AGREEMENT (this “Amendment”) is made and entered into as of March 19, 2020, by and among WESTLAKE CHEMICAL PARTNERS LP, a Delaware limited partnership (“Borrower”), as borrower and WESTLAKE CHEMICAL FINANCE CORPORATION, a Delaware corporation (“Lender”), as lender.

May 6, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partne

May 4, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 4, 2020 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commissi

May 4, 2020 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces First Quarter 2020 Results •Maintained quarterly distribution of $0.4714 per unit HOUSTON-(BUSINESS WIRE)-Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attributable to the Partnership of $17.7 millio

April 14, 2020 CORRESP

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CORRESP Westlake Chemical Partners LP 2801 Post Oak Boulevard, Suite 600 Houston, Texas 77056 (713) 585-2900 April 14, 2020 By EDGAR Ms.

March 24, 2020 8-K

Regulation FD Disclosure, 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 24, 2020 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commi

March 24, 2020 EX-99.1

Westlake Chemical Partners Selects Steve Finley to Join Board of Directors

EX-99.1 EXHIBIT 99.1 Westlake Chemical Partners Selects Steve Finley to Join Board of Directors HOUSTON, March 24, 2020 – Westlake Chemical Partners LP (NYSE: WLKP) today announced that Mr. G. Stephen Finley has been appointed to the board of directors of its general partner, Westlake Chemical Partners GP LLC. He will replace Mr. Max L. Lukens, who previously informed the company that he would ret

March 4, 2020 CORRESP

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CORRESP Westlake Chemical Partners LP 2801 Post Oak Boulevard, Suite 600 Houston, Texas 77056 (713) 585-2900 March 4, 2020 By EDGAR Ms.

March 3, 2020 CORRESP

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CORRESP Westlake Chemical Partners LP 2801 Post Oak Boulevard, Suite 600 Houston, Texas 77056 (713) 585-2900 March 3, 2020 By EDGAR Ms.

February 28, 2020 EX-4.1

Form of Indenture.

Exhibit 4.1 [Form of Indenture] WESTLAKE CHEMICAL PARTNERS LP and WLKP FINANCE CORP., as Issuers and [ ], as Trustee INDENTURE Dated as of Debt Securities CROSS-REFERENCE TABLE TIA Section Indenture Section 310 (a) 7.10 (b) 7.10 (c) N.A. 311 (a) 7.11 (b) 7.11 (c) N.A. 312 (a) 5.01 (b) 5.02 (c) 5.02 313 (a) 5.03 (b) 5.03 (c) 13.03 (d) 5.03 314 (a) 4.05 (b) N.A. (c)(1) 13.05 (c)(2) 13.05 (c)(3) N.A.

February 28, 2020 EX-10.9

Amended and Restated Senior Unsecured Revolving Credit Agreement by and among Westlake Chemical OpCo LP, Westlake Polymers LLC and the lenders party thereto, dated as of June 1, 2017 (incorporated by reference to Exhibit 10.9 to Westlake Chemical Partners LP's Annual Report on Form 10-K for the year ended December 31, 2019, filed on February 28, 2020, File No. 001-36567).

EXHIBIT 10.9 Execution Version AMENDED AND RESTATED SENIOR UNSECURED REVOLVING CREDIT AGREEMENT dated as of June 1, 2017 among Westlake Chemical OpCo LP as Borrower, Westlake Polymers LLC as Administrative Agent and The Lenders Party Hereto TABLE OF CONTENTS ARTICLE I DEFINITIONS; CONSTRUCTION 1 Section 1.1 Definitions 1 Section 1.2 Other Definitional Provisions. 4 Section 1.3 Accounting Terms and

February 28, 2020 S-3

As filed with the Securities and Exchange Commission on February 28, 2020

Table of Contents As filed with the Securities and Exchange Commission on February 28, 2020 Registration No.

February 28, 2020 10-K

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Ch

February 28, 2020 EX-21.1

List of Subsidiaries of Westlake Chemical Partners LP.

EXHIBIT 21.1 SUBSIDIARIES OF WESTLAKE CHEMICAL PARTNERS LP Name of Subsidiary Jurisdiction Westlake Chemical OpCo GP LLC Delaware Westlake Chemical OpCo LP Delaware

February 28, 2020 EX-10.22

First Amendment to Equity Distribution Agreement by and among Westlake Chemical Partners LP, Westlake Chemical Partners GP LLC, UBS Securities LLC, Barclays Capital Inc., BofA Securities, Inc., Citigroup Global Markets Inc., Deutsche Bank Securities Inc., RBC Capital Markets, LLC and Wells Fargo Securities, LLC dated as of February 28, 2020 (incorporated by reference to Exhibit 10.22 to Westlake Chemical Partnership LP's Annual Report on Form 10-K for the year ended December 31, 2019, filed on February 28, 2020, File No, 001-36567).

EXHIBIT 10.22 WESTLAKE CHEMICAL PARTNERS LP Common Units Representing Limited Partner Interests Having an Aggregate Offering Price of up to $50,000,000 FIRST AMENDMENT TO EQUITY DISTRIBUTION AGREEMENT February 28, 2020 UBS SECURITIES LLC BARCLAYS CAPITAL INC. BOFA SECURITIES, INC. CITIGROUP GLOBAL MARKETS INC. DEUTSCHE BANK SECURITIES INC. RBC CAPITAL MARKETS, LLC WELLS FARGO SECURITIES, LLC c/o U

February 28, 2020 EX-4.1

Description of Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934 (incorporated by reference to Exhibit 4.1 to Westlake Chemical Partners' Annual Report on Form 10-K for the year ended December 31, 2019, File No. 001-36567).

EXHIBIT 4.1 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 The following is a summary of Westlake Chemical Partners LP’s (“we,” “us” and “our”) common units, but this summary does not purport to be complete and is subject to and qualified by reference to our prospectus filed in connection with our initial public offering (our “IP

February 18, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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 13, 2020 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Co

February 18, 2020 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Fourth Quarter and Full Year 2019 Results •Record annual net income attributable to the Partnership of $61.0 million; record annual MLP distributable cash flow of $73.2 million •Record annual production at OpCo •Increased quarterly cash distr

February 18, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 18, 2020 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Co

February 14, 2020 SC 13G

WLKP / Westlake Chemical Partners LP / Energy Income Partners, LLC - SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. )* Westlake Chemical Partners, LP (Name of Issuer) Common Units (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2019 (Date

February 12, 2020 SC 13G/A

WLKP / Westlake Chemical Partners LP / Invesco Ltd. - SEC 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. 1 )* Westlake Chemical Partners LP (Name of Issuer) Partnership Interest (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

January 31, 2020 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, 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 27, 2020 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation)

January 27, 2020 SC 13G/A

WLKP / Westlake Chemical Partners LP / WPT LLC - 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. 05)* Westlake Chemical Partners LP (Name of Issuer) Common Units Representing Limited Partner Interests, No Par Value (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statemen

January 27, 2020 EX-99.1

EXHIBIT 99.1 JOINT FILING AGREEMENT

EXHIBIT 99.1 JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k)(1)(iii) of the Securities Exchange Act of 1934, each of the undersigned agrees that a single joint Schedule 13G/A and any further amendments thereto may be filed on behalf of each of the undersigned with respect to the common units held by each of them in Westlake Chemical Partners LP. Dated: January 27, 2020 WPT LLC By: /s/ ALBERT CHAO

November 8, 2019 8-K

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

Form 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): November 8, 2019 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporat

November 8, 2019 EX-99.1

WESTLAKE CHEMICAL PARTNERS SELECTS RANDY WOELFEL TO JOIN BOARD OF DIRECTORS

EX-99.1 Exhibit 99.1 WESTLAKE CHEMICAL PARTNERS SELECTS RANDY WOELFEL TO JOIN BOARD OF DIRECTORS HOUSTON, November 8, 2019 – Westlake Chemical Partners LP (NYSE: WLKP) today announced that Mr. Randy G. Woelfel has been appointed to the board of directors of its general partner, Westlake Chemical Partners GP LLC. He will replace Mr. David Lumpkins, who informed the company that he will resign from

November 6, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Pa

November 5, 2019 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 5, 2019 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Com

November 5, 2019 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Third Quarter 2019 Results •Quarterly net income attributable to the Partnership of $14.9 million; MLP distributable cash flow of $20.5 million •Increased quarterly cash distribution by 1.5% sequentially, or 6% annualized, compared to the sec

October 17, 2019 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, 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 11, 2019 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation)

August 6, 2019 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 6, 2019 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commi

August 6, 2019 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Second Quarter 2019 Results •Quarterly net income attributable to the Partnership of $13.7 million; MLP distributable cash flow of $16.4 million •Increased quarterly cash distribution by 2.9% sequentially, or 12% compared to the second quarte

August 6, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partner

June 10, 2019 EX-99

JOINT FILING AGREEMENT

Invesco Joint Filing Agreement JOINT FILING AGREEMENT In accordance with Rule 13d-1(k) (l) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing of the attached Schedule 13G, and any and all amendments thereto, and expressly authorize Invesco Ltd.

June 10, 2019 SC 13G

WLKP / Westlake Chemical Partners LP / Invesco Ltd. - SEC 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. )* Westlake Chemical Partners LP ** (Name of Issuer) Partnership Interest (Title of Class of Securities) 960417103 ** (CUSIP Number) May 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

May 2, 2019 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 2, 2019 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commissi

May 2, 2019 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces First Quarter 2019 Results •Acquired additional 4.5% ownership interest in Westlake Chemical OpCo LP •Quarterly net income attributable to the Partnership of $15.0 million; MLP distributable cash flow of $17.6 million •Increased quarterly cas

May 2, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 or ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partne

April 10, 2019 CORRESP

WLKP / Westlake Chemical Partners LP CORRESP

CORRESP Westlake Chemical Partners LP 2801 Post Oak Boulevard, Suite 600 Houston, Texas 77056 (713) 585-2900 April 10, 2019 By EDGAR Mr.

April 8, 2019 SC 13D

WLKP / Westlake Chemical Partners LP / TTWF LP Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) COMMON UNITS REPRESENTING LIMITED PARTNER INTERESTS, NO PAR VALUE (Title of Class of Securities) 960417103 (CUSIP Number) March 29, 2019 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communica

March 29, 2019 S-3

WLKP / Westlake Chemical Partners LP FORM S-3

Form S-3 Table of Contents As filed with the Securities and Exchange Commission on March 29, 2019 Registration No.

March 29, 2019 8-K

Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets, 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 Earliest Event Reported: March 29, 2019 WESTLAKE CHEMICAL PARTNERS LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or Other Jurisdiction of Incorporation) (Commission File Nu

March 29, 2019 EX-4.1

Registration Rights Agreement by and among Westlake Chemical Partners LP and the persons named therein, dated as of March 29, 2019 (incorporated by reference to Exhibit 4.1 to Westlake Chemical Partners LP's Current Report on Form 8-K, filed on March 29, 2019, File No. 001-36567).

EX-4.1 Exhibit 4.1 REGISTRATION RIGHTS AGREEMENT BY AND AMONG WESTLAKE CHEMICAL PARTNERS LP AND THE PURCHASERS TABLE OF CONTENTS ARTICLE I DEFINITIONS 1 Section 1.01 Definitions 1 Section 1.02 Registrable Securities 3 ARTICLE II REGISTRATION RIGHTS 3 Section 2.01 Mandatory Registration 3 Section 2.02 Failure to File or Become Effective; Liquidated Damages 4 Section 2.03 Blackout and Delay Rights 4

March 27, 2019 8-K/A

Regulation FD Disclosure, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Completion of Acquisition or Disposition of Assets

8-K/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Earliest Event Reported: March 26, 2019 WESTLAKE CHEMICAL PARTNERS LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or Other Jurisdiction of Incorporatio

March 27, 2019 EX-2.1

Equity Purchase Agreement by and among Westlake Chemical Partners, LP, Westlake Chemical OpCo LP and WPT LLC, dated as of March 26, 2019 (incorporated by reference to Exhibit 2.1 to Westlake Chemical Partner LP’s Current Report on Form 8-K, filed on March 27, 2019, File No 001-36567).

EX-2.1 Exhibit 2.1 EQUITY PURCHASE AGREEMENT BY AND AMONG WESTLAKE CHEMICAL PARTNERS LP WESTLAKE CHEMICAL OPCO LP AND WPT LLC DATED AS OF MARCH 26, 2019 EQUITY PURCHASE AGREEMENT This Equity Purchase Agreement (this “Agreement”) is entered into and dated as of March 26, 2019 (the “Execution Date”), by and among Westlake Chemical Partners LP, a Delaware limited partnership (the “Partnership”), West

March 27, 2019 8-K

Regulation FD Disclosure, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Completion of Acquisition or Disposition of Assets

Form 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 Earliest Event Reported: March 26, 2019 WESTLAKE CHEMICAL PARTNERS LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or Other Jurisdiction of Incorporation) (Commission Fi

March 27, 2019 EX-99.1

Westlake Chemical Partners LP Announces Acquisition of Additional Interest in Westlake Chemical OpCo and Private Placement of Common Units

EX-99.1 Exhibit 99.1 Westlake Chemical Partners LP Announces Acquisition of Additional Interest in Westlake Chemical OpCo and Private Placement of Common Units Houston, March 27, 2019 - Westlake Chemical Partners LP (NYSE: WLKP) (the “Partnership”) today announced that it has agreed to acquire an additional 4.50% limited partner interest in Westlake Chemical OpCo LP (“OpCo”) on a fully diluted bas

March 1, 2019 10-K

WLKP / Westlake Chemical Partners LP 10-K (Annual Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2018 or ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Ch

March 1, 2019 EX-21.1

List of Subsidiaries of Westlake Chemical Partners LP.

EXHIBIT 21.1 SUBSIDIARIES OF WESTLAKE CHEMICAL PARTNERS LP Name of Subsidiary Jurisdiction Westlake Chemical OpCo GP LLC Delaware Westlake Chemical OpCo LP Delaware

February 19, 2019 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Fourth Quarter 2018 Results •Increased quarterly cash distribution by 2.9% sequentially, or 12% compared to the fourth quarter 2017 distribution, to $0.4328 per unit, the 16th consecutive quarterly increase in distributions •Trailing twelve-m

February 19, 2019 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 19, 2019 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Co

February 14, 2019 SC 13G/A

WLKP / Westlake Chemical Partners LP / Harvest Fund Advisors LLC - AMENDMENT NO.1 TO SCHEDULE 13G Passive Investment

Amendment No.1 to Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.1)* WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) Common Units Representing Limited Partner Interests (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2018 (Date of Event which Requires Filing of this Statem

February 11, 2019 SC 13G/A

WLKP / Westlake Chemical Partners LP / TTWF LP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) COMMON UNITS REPRESENTING LIMITED PARTNER INTERESTS, NO PAR VALUE (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the a

February 6, 2019 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 04)* Westlake Chemical Partners LP (Name of Issuer) Common Units Representing Limited Partner Interests, No

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 04)* Westlake Chemical Partners LP (Name of Issuer) Common Units Representing Limited Partner Interests, No Par Value (Title of Class of Securities) 960417 103 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the

February 6, 2019 EX-99.1

[Signature Page—Schedule 13G Joint Filing Agreement]

EXHIBIT 99.1 JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k)(1)(iii) of the Securities Exchange Act of 1934, each of the undersigned agrees that a single joint Schedule 13G/A and any further amendments thereto may be filed on behalf of each of the undersigned with respect to the common units held by each of them in Westlake Chemical Partners LP. Dated: February 6, 2019. WPT LLC By: /s/ Albert Cha

January 10, 2019 SC 13G/A

WLKP / Westlake Chemical Partners LP / OPPENHEIMER FUNDS INC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5)* Westlake Chemical Partners LP (Name of Issuer) Common Units (Title of Class of Securities) 960417103 (CUSIP Number) 12/31/2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

November 6, 2018 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Third Quarter 2018 Results •Increased quarterly cash distribution by 2.9% sequentially, or 12% compared to the third quarter 2017 distribution, to $0.4207 per unit, the 15th consecutive quarterly increase in distributions •Trailing twelve-mon

November 6, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 6, 2018 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Com

November 6, 2018 EX-10.1

First Amendment to Amended and Restated Senior Unsecured Revolving Credit Agreement (incorporated by reference to Exhibit 10.1 to Westlake Chemical Partners LP's Quarterly Report on Form 10-Q for the quarter ended September 30, 2018 (File No. 01-36567) filed on November 6, 2018)

Exhibit 10.1 FIRST AMENDMENT TO AMENDED AND RESTATED SENIOR UNSECURED REVOLVING CREDIT AGREEMENT This FIRST AMENDMENT TO AMENDED AND RESTATED SENIOR UNSECURED REVOLVING CREDIT AGREEMENT (this “Amendment”) is made and entered into as of September 25, 2018, by and among WESTLAKE CHEMICAL OPCO LP, a Delaware limited partnership (“Borrower”), as borrower, WESTLAKE POLYMERS LLC, a Delaware limited liab

November 6, 2018 EX-10.2

Second Amendment to Ethylene Sales Agreement (incorporated by reference to Exhibit 10.2 to Westlake Chemical Partners LP's Quarterly Report on Form 10-Q for the quarter ended September 30, 2018 (File No. 01-36567) filed on November 6, 2018).

Exhibit 10.2 SECOND AMENDMENT TO ETHYLENE SALES AGREEMENT This SECOND AMENDMENT (this “Amendment”), dated as of November 1, 2018, and effective as of January 1, 2018, to the ETHYLENE SALES AGREEMENT, dated as of August 4, 2014, as amended by that certain First Amendment dated as of August 4, 2016 and effective as of January 1, 2016 (as amended, the “Agreement”), is entered into by and among WESTLA

November 6, 2018 10-Q

WLKP / Westlake Chemical Partners LP 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2018 or ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Pa

October 5, 2018 424B5

The date of this prospectus supplement is October 4, 2018.

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-216617 PROSPECTUS SUPPLEMENT (To Prospectus dated March 24, 2017) Common Units Representing Limited Partner Interests Having an Aggregate Offering Amount of Up to $50,000,000 This prospectus supplement and the accompanying base prospectus relate to the issuance and sale from time to time of common units representing limi

October 5, 2018 EX-1.1

Equity Distribution Agreement, dated October 4, 2018, by and among Westlake Chemical Partners LP, Westlake Chemical Partners GP LLC, UBS Securities LLC, Barclays Capital Inc., Citigroup Global Markets Inc., Deutsche Bank Securities Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets, LLC and Wells Fargo Securities, LLC (incorporated by reference to Exhibit 1.1 to Westlake Chemical Partners LP's Current Report on Form 8-K filed on October 5, 2018, File No. 001-36567).

EX-1.1 Exhibit 1.1 WESTLAKE CHEMICAL PARTNERS LP Common Units Representing Limited Partner Interests Having an Aggregate Offering Price of up to $50,000,000 EQUITY DISTRIBUTION AGREEMENT October 4, 2018 UBS SECURITIES LLC BARCLAYS CAPITAL INC. CITIGROUP GLOBAL MARKETS INC. DEUTSCHE BANK SECURITIES INC. MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED RBC CAPITAL MARKETS, LLC WELLS FARGO SECURITI

October 5, 2018 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 4, 2018 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation or

August 2, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 2, 2018 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commi

August 2, 2018 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Second Quarter 2018 Results • Increased quarterly cash distribution by 2.8% sequentially, or 12% compared to the second quarter 2017 distribution, to $0.4088 per unit, the 14th consecutive quarterly increase in distributions • Reset the targe

August 2, 2018 10-Q

WLKP / Westlake Chemical Partners LP 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2018 or ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partner

July 30, 2018 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

Form 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 27, 2018 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation

July 30, 2018 EX-3.1

Amendment No. 2 to the First Amended and Restated Agreement of Limited Partnership of Westlake Chemical Partners LP (incorporated by reference to Exhibit 3.1 to Westlake Chemical Partners LP's Current Report on Form 8-K filed on July 30, 2018 (File No. 01-36567)).

EX-3.1 2 d583758dex31.htm EX-3.1 Exhibit 3.1 AMENDMENT NO. 2 TO THE FIRST AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF WESTLAKE CHEMICAL PARTNERS LP July 27, 2018 This Amendment No. 2 (this “Amendment”) to the First Amended and Restated Agreement of Limited Partnership of Westlake Chemical Partners LP, a Delaware limited partnership (the “Partnership”), dated as of August 4, 2014 and f

May 3, 2018 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces First Quarter 2018 Results • Increased quarterly cash distribution by 2.9% sequentially, or 12% compared to the first quarter 2017 distribution, to $0.3975 per unit, the thirteenth consecutive quarterly increase in distributions • Quarterly n

May 3, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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 3, 2018 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation) (Commissi

May 3, 2018 10-Q

WLKP / Westlake Chemical Partners LP 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2018 or ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partne

April 3, 2018 EX-99.A

JOINT FILING AGREEMENT

Exhibit A Exhibit A JOINT FILING AGREEMENT Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (the “Exchange Act”) the undersigned hereby agree to the joint filing on behalf of each of them of any filing required by such party under Section 13 of the Exchange Act or any rule or regulation thereunder (including any amendment, restatement, supplement, and/or exhibit thereto) with respect to securities of Westlake Chemical Partners LP, a Delaware limited partnership, and further agree to the filing, furnishing, and/or incorporation by reference of this Agreement as an exhibit thereto.

April 3, 2018 SC 13G

WLKP / Westlake Chemical Partners LP / Harvest Fund Advisors LLC - SC 13G Passive Investment

SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) Common Units Representing Limited Partner Interests (Title of Class of Securities) 960417103 (CUSIP Number) March 30, 2018 (Date of Event which Requires Filing of this Statement) Check the appropriate

April 3, 2018 EX-99.B

POWER OF ATTORNEY

EX-99.B 3 d279766dex99b.htm EXHIBIT B Exhibit B POWER OF ATTORNEY Know all by these presents that Eric M. Conklin does hereby make, constitute and appoint Anthony Merhige and David Thayer, or either one of them, as a true and lawful attorney-in-fact of the undersigned with full powers of substitution and revocation, for and in the name, place and stead of the undersigned (both in the undersigned’s

April 3, 2018 SC 13D/A

WLKP / Westlake Chemical Partners LP / Harvest Fund Holdco L.p. - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934* (Amendment No. 2) WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) Common Units Representing Limited Partner Interests (Title of Class of Securities) 960417103 (CUSIP Number) John G. Finley c/o The Blackstone Group L.P. 345 Park Avenue New York, New York 10154 Tel:

March 23, 2018 SC 13D/A

WLKP / Westlake Chemical Partners LP / Harvest Fund Advisors LLC - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934* (Amendment No. 1) WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) Common Units Representing Limited Partner Interests (Title of Class of Securities) 960417103 (CUSIP Number) Anthony Merhige Harvest Fund Advisors LLC 100 West Lancaster Avenue, Suite 200 Wayne, Penn

March 1, 2018 EX-10.24

Second Amendment to Senior Unsecured Revolving Credit Agreement by and between Westlake Chemical Partners LP, as borrower, and Westlake Chemical Finance Corporation, as lender, dated as of November 28, 2017 (incorporated by reference to Exhibit 10.24 to Westlake Chemical Partners LP's Annual Report on Form 10-K for the year ended December 31, 2017 (File No. 01-36567) filed on March 1, 2018).

EXHIBIT 10.24 SECOND AMENDMENT TO SENIOR UNSECURED REVOLVING CREDIT AGREEMENT This SECOND AMENDMENT TO SENIOR UNSECURED REVOLVING CREDIT AGREEMENT (this “Amendment”) is made and entered into as of November 28, 2017, by and among WESTLAKE CHEMICAL PARTNERS LP, a Delaware limited partnership (“Borrower”), as borrower and WESTLAKE CHEMICAL FINANCE CORPORATION, a Delaware corporation (“Lender”), as le

March 1, 2018 10-K

WLKP / Westlake Chemical Partners LP 10-K (Annual Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2017 or ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Ch

March 1, 2018 EX-3.4

Amendment No. 1 to the Amended and Restated Agreement of Limited Partnership of Westlake Chemical OpCo LP dated as of December 1, 2017 (File No. 01-36567) (incorporated by reference to Exhibit 3.4 to Westlake Chemical Partners LP's Annual Report on Form 10-K for the year ended December 31, 2017 (File No. 01-36567) filed on March 1, 2018).

EXHIBIT 3.4 AMENDMENT NO. 1 TO THE AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF WESTLAKE CHEMICAL OPCO LP December 1, 2017 This Amendment No. 1 (this “Amendment”) to the Amended and Restated Agreement of Limited Partnership of Westlake Chemical OpCo LP, a Delaware limited partnership (the “Partnership”), dated as of August 4, 2014 (the “Partnership Agreement”), is entered into effectiv

March 1, 2018 EX-12.1

Ratio of Earnings to Fixed Charges

EXHIBIT 12.1 WESTLAKE CHEMICAL PARTNER LP RATIO OF EARNINGS TO FIXED CHARGES (millions of dollars) Year Ended December 31, 2017 2016 2015 2014 2013 Earnings Income before Income Taxes $ 354,338 $ 354,438 $ 354,525 $ 709,208 $ 846,825 Fixed Charges 23,099 19,414 11,125 14,323 9,343 Amortization of capitalized interest 540 472 228 24 — Equity Investee Distributions — — — 4,045 5,114 less: capitalize

March 1, 2018 EX-21.1

List of Subsidiaries of Westlake Chemical Partners LP.

EXHIBIT 21.1 SUBSIDIARIES OF WESTLAKE CHEMICAL PARTNERS LP Name of Subsidiary Jurisdiction Westlake Chemical OpCo GP LLC Delaware Westlake Chemical OpCo LP Delaware

March 1, 2018 EX-10.12

Form of Phantom Unit Agreement (incorporated by reference to Exhibit 10.12 to Westlake Chemical Partners LP's Annual Report on Form 10-K for the year ended December 31, 2017 (File No. 01-36567) filed on March 1, 2018)

EXHIBIT 10.12 PHANTOM UNIT AGREEMENT This Phantom Unit Agreement (this “Agreement”) is made as of Date (the “Grant Date”) between Westlake Chemical Partners GP LLC, a Delaware limited liability company (the “General Partner”), and Full Name (the “Director”) pursuant to the terms and conditions of the Westlake Chemical Partners LP Long-Term Incentive Plan (the “Plan”). Capitalized terms used in thi

February 20, 2018 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

Exhibit EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact?(713) 585-2900 Investors?Steve Bender Media?L. Benjamin Ederington Westlake Chemical Partners LP Announces Record 2017 Fourth Quarter and Full Year Results ? Increased quarterly cash distribution by 2.9% sequentially, or 12% compared to the fourth quarter 2016 distribution, to $0.3864 per unit, the twelfth consecutive quarterly increase in

February 20, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

Document 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 20, 2018 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorpora

February 14, 2018 SC 13G/A

WLKP / Westlake Chemical Partners LP / TTWF LP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) COMMON UNITS REPRESENTING LIMITED PARTNER INTERESTS, NO PAR VALUE (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2017 (Date of Event Which Requires Filing of this Statement) Check the a

February 14, 2018 SC 13G/A

WLKP / Westlake Chemical Partners LP / Energy Income Partners, LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 1)* Westlake Chemical Partners, LP (Name of Issuer) Common Units (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2017 (Dat

February 5, 2018 SC 13G/A

WLKP / Westlake Chemical Partners LP / OPPENHEIMER FUNDS INC - FORM SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* Westlake Chemical Partners LP (Name of Issuer) Common Units (Title of Class of Securities) 960417103 (CUSIP Number) 12/31/2017 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

January 26, 2018 EX-99.1

[Signature Page—Schedule 13G Joint Filing Agreement]

EX-99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k)(1)(iii) of the Securities Exchange Act of 1934, each of the undersigned agrees that a single joint Schedule 13G/A and any further amendments thereto may be filed on behalf of each of the undersigned with respect to the common units held by each of them in Westlake Chemical Partners LP. Dated: January 26, 2018. WPT LLC By: /s/ AL

January 26, 2018 SC 13G/A

WLKP / Westlake Chemical Partners LP / WPT LLC - SC 13G/A Passive Investment

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 03)* Westlake Chemical Partners LP (Name of Issuer) Common Units Representing Limited Partner Interests, No Par Value (Title of Class of Securities) 960417 103 (CUSIP Number) December 31, 2017 (Date of Event Which Requires Filing of this Statement)

November 16, 2017 EX-3.1

Amendment No. 1 to the First Amended and Restated Agreement of Limited Partnership of Westlake Chemical Partners LP dated as of November 16, 2017 (incorporated by Reference to Exhibit 3.1 to Westlake Chemical Partners LP's Current Report on Form 8-K, filed on November 16, 2017, File No. 01-36567).

EX-3.1 Exhibit 3.1 AMENDMENT NO. 1 TO THE FIRST AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF WESTLAKE CHEMICAL PARTNERS LP November 16, 2017 This Amendment No. 1 (this ?Amendment?) to the First Amended and Restated Agreement of Limited Partnership of Westlake Chemical Partners LP, a Delaware limited partnership (the ?Partnership?), dated as of August 4, 2014 (the ?Partnership Agreement

November 16, 2017 8-K

WLKP / Westlake Chemical Partners LP FORM 8-K (Current Report)

Form 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): November 16, 2017 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorpora

November 7, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

Document 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): November 7, 2017 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporat

November 7, 2017 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

Exhibit EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact?(713) 585-2900 Investors?Steve Bender Media?L. Benjamin Ederington Westlake Chemical Partners LP Announces Third Quarter 2017 Earnings ? Increased quarterly cash distribution by 2.9% sequentially, or 12% annually, to $0.3756 per unit, the eleventh consecutive quarterly increase in distributions ? Acquired an additional 5% interest in Westl

November 7, 2017 EX-10.1

Investment Management Agreement among Westlake Corporation, Westlake Chemical OpCo LP, and Westlake Chemical Partners LP, dated as of August 1, 2017 (incorporated by reference to Exhibit 10.1 to Westlake Chemical Partners LP's Quarterly Report on Form 10-Q for the quarter ended September 30, 2017, (File No. 01-36567) filed on November 7, 2017).

Exhibit 10.1 INVESTMENT MANAGEMENT AGREEMENT among WESTLAKE CHEMICAL CORPORATION, WESTLAKE CHEMICAL OPCO LP, and WESTLAKE CHEMICAL PARTNERS LP Dated as of August 1, 2017 INVESTMENT MANAGEMENT AGREEMENT This INVESTMENT MANAGEMENT AGREEMENT (this ?Agreement?) is made as of August 1, 2017, among WESTLAKE CHEMICAL CORPORATION, a Delaware corporation (?Westlake?), WESTLAKE CHEMICAL OPCO LP, a Delaware

November 7, 2017 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2017 or ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Pa

October 26, 2017 EX-99.A

JOINT FILING AGREEMENT

EX-99.A EXHIBIT A JOINT FILING AGREEMENT Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (the “Exchange Act”) the undersigned hereby agree to the joint filing on behalf of each of them of any filing required by such party under Section 13 of the Exchange Act or any rule or regulation thereunder (including any amendment, r

October 26, 2017 SC 13D

WLKP / Westlake Chemical Partners LP / Harvest Fund Advisors LLC - SC 13D Activist Investment

SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934* (Amendment No. ) WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) Common Units Representing Limited Partner Interests (Title of Class of Securities) 960417103 (CUSIP Number) Anthony Merhige Harvest Fund Advisors LLC 100 West Lancaster Avenue, Suite 200 Wayne, Pennsyl

October 6, 2017 SC 13G/A

WLKP / Westlake Chemical Partners LP / OPPENHEIMER FUNDS INC - FORM SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) Common Units (Title of Class of Securities) 960417103 (CUSIP Number) 09/29/2017 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

October 3, 2017 8-K

Westlake Chemical Partners FORM 8-K (Current Report/Significant Event)

Form 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 Earliest Event Reported: September 29, 2017 WESTLAKE CHEMICAL PARTNERS LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or Other Jurisdiction of Incorporation) (Commissio

September 28, 2017 EX-1.1

Underwriting Agreement by and among Westlake Chemical Partners LP, Westlake Chemical Partners GP LLC, and UBS Securities LLC and Citigroup Global Markets Inc., for themselves and as representatives of the other underwriters named therein, dated September 26, 2017.

EX-1.1 Exhibit 1.1 Execution Version WESTLAKE CHEMICAL PARTNERS LP 4,500,000 Common Units Representing Limited Partner Interests UNDERWRITING AGREEMENT September 26, 2017 UBS SECURITIES LLC CITIGROUP GLOBAL MARKETS INC. As Representatives of the several Underwriters named in Schedule I attached hereto c/o UBS Securities LLC 1285 Avenue of the Americas New York, New York 10019 c/o Citigroup Global

September 28, 2017 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 Earliest Event Reported: September 26, 2017 WESTLAKE CHEMICAL PARTNERS LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or Other Jurisdiction of Incorporation) (Commission Fil

September 27, 2017 424B5

Joint Book-Running Managers UBS Investment Bank Citigroup Barclays BofA Merrill Lynch The date of this prospectus supplement is September 26, 2017.

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-216617 PROSPECTUS SUPPLEMENT (To Prospectus dated March 24, 2017) Westlake Chemical Partners LP 4,500,000 Common Units Representing Limited Partner Interests This is an offering of 4,500,000 common units representing limited partner interests in Westlake Chemical Partners LP. Our common units trade on the New York Stock

September 26, 2017 424B5

The date of this prospectus supplement is September , 2017.

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-216617 The information in this preliminary prospectus supplement relates to an effective registration statement under the Securities Act of 1933 but is not complete and may be changed. This preliminary prospectus supplement and the accompanying base prospectus are not an offer to sell these securities and we are not soli

September 26, 2017 EX-99.1

Westlake Chemical Partners LP Acquires Additional Interest in Westlake Chemical OpCo

EX-99.1 Exhibit 99.1 For Further Information Contact: Contact ? 713.585.2900 Media Relations ? L. Benjamin Ederington Investor Relations ? Steve Bender Westlake Chemical Partners LP Acquires Additional Interest in Westlake Chemical OpCo Houston, TX, September 26, 2017 - Westlake Chemical Partners LP (NYSE: WLKP) (the ?Partnership?) today announced that it has agreed to acquire an additional 5.0% l

September 26, 2017 EX-99.2

Westlake Chemical Partners LP Announces Offering of Common Units

EX-99.2 Exhibit 99.2 For Further Information Contact: Contact – 713.585.2900 Media Relations – L. Benjamin Ederington Investor Relations – Steve Bender Westlake Chemical Partners LP Announces Offering of Common Units Houston, TX, September 26, 2017 - Westlake Chemical Partners LP (NYSE: WLKP) (the “Partnership”) announced the commencement of an underwritten public offering of 4,500,000 common unit

September 26, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

Form 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 Earliest Event Reported: September 26, 2017 WESTLAKE CHEMICAL PARTNERS LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or Other Jurisdiction of Incorporation) (Commissio

September 26, 2017 EX-2.1

Equity Purchase Agreement by and among Westlake Chemical Partners LP, Westlake Chemical OpCo LP and WPT LLC, dated as of September 26, 2017 (incorporated by reference to Exhibit 2.1 to Westlake Chemical Partners LP's Current Report on Form 8-K, filed on September 26, 2017, File No. 001-36567)

EX-2.1 Exhibit 2.1 EQUITY PURCHASE AGREEMENT BY AND AMONG WESTLAKE CHEMICAL PARTNERS LP WESTLAKE CHEMICAL OPCO LP AND WPT LLC DATED AS OF SEPTEMBER 26, 2017 EQUITY PURCHASE AGREEMENT This Equity Purchase Agreement (this ?Agreement?) is entered into and dated as of September 26, 2017 (the ?Execution Date?), by and among Westlake Chemical Partners LP, a Delaware limited partnership (the ?Partnership

September 26, 2017 EX-99.3

Notices and Disclaimers This presentation contains certain forward-looking statements, including statements with respect to future growth, potential levers for distributable cash flow, growth for Westlake Chemical Partners and the timing and results

EX-99.3 Investor Presentation September 2017 Westlake Chemical Partners LP Exhibit 99.3 Notices and Disclaimers This presentation contains certain forward-looking statements, including statements with respect to future growth, potential levers for distributable cash flow, growth for Westlake Chemical Partners and the timing and results of a scheduled debottleneck of ethylene cracking unit. Actual

August 3, 2017 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

Exhibit EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact?(713) 585-2900 Investors?Steve Bender Media?L. Benjamin Ederington Westlake Chemical Partners LP Announces Second Quarter 2017 Earnings ? Quarterly net income attributable to the Partnership of $10.0 million, or $0.36 per unit ? Quarterly MLP distributable cash flow of $11.0 million ? Increased quarterly cash distribution by 2.85% to $0.36

August 3, 2017 8-K

Westlake Chemical Partners 8-K (Current Report/Significant Event)

Document 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 3, 2017 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporatio

August 3, 2017 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2017 or ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemical Partner

August 3, 2017 EX-10.1

First Amendment to Senior Unsecured Revolving Credit Agreement by and between Westlake Chemical Partners LP, as borrower, and Westlake Chemical Finance Corporation, as lender, dated as of August 1, 2017 (incorporated by reference to Exhibit 10.1 to Westlake Chemical Partners LP's Quarterly Report on Form 10-Q for the quarter ended June 30, 2017 (File No. 01-36567) filed on August 3, 2017).

Exhibit 10.1 FIRST AMENDMENT TO SENIOR UNSECURED REVOLVING CREDIT AGREEMENT This FIRST AMENDMENT TO SENIOR UNSECURED REVOLVING CREDIT AGREEMENT (this “Amendment”) is made and entered into as of August 1, 2017, by and among WESTLAKE CHEMICAL PARTNERS LP, a Delaware limited partnership (“Borrower”), as borrower and WESTLAKE CHEMICAL FINANCE CORPORATION, a Delaware corporation (“Lender”), as lender.

May 3, 2017 10-Q

Westlake Chemical Partners LP 10-Q (Quarterly Report)

Document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2017 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Chemic

May 2, 2017 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

Exhibit EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces First Quarter 2017 Earnings and the completion of OpCo’s expansion in Calvert City, Kentucky • Quarterly net income attributable to the Partnership of $9.8 million, or $0.35 per unit • Quarterly MLP distributable cash flow of $11.4 mi

May 2, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

Document 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 2, 2017 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporation)

April 24, 2017 SC 13G/A

WLKP / Westlake Chemical Partners LP / Harvest Fund Advisors LLC - SC 13G/A Passive Investment

Harvest Fund Advisors LLC: Form SC 13G/A - Filed by newsfilecorp.com UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) Common Units Representing Limited Partner Interests (Title of Class of Securities) 960417103 (CUSIP Number) (Date of Event which Requires

March 22, 2017 CORRESP

Westlake Chemical Partners LP ESP

CORRESP Westlake Chemical Partners LP 2801 Post Oak Boulevard, Suite 600 Houston, Texas 77056 (713) 585-2900 March 22, 2017 By EDGAR Mr.

March 10, 2017 EX-4.1

Registration Rights Agreement by and among Westlake Chemical Partners LP and the persons named therein, dated as of March 29, 2019 (incorporated by reference to Exhibit 4.1 to Westlake Chemical Partners LP’s Current Report on Form 8-K, filed on March 29, 2019, File No. 01-36567).

EX-4.1 Exhibit 4.1 [Form of Indenture] WESTLAKE CHEMICAL PARTNERS LP and WLKP FINANCE CORP., as Issuers, ANY SUBSIDIARY GUARANTORS PARTY HERETO, and [ ], as Trustee INDENTURE Dated as of Debt Securities CROSS-REFERENCE TABLE TIA Section Indenture Section 310 (a) 7.10 (b) 7.10 (c) N.A. 311 (a) 7.11 (b) 7.11 (c) N.A. 312 (a) 5.01 (b) 5.02 (c) 5.02 313 (a) 5.03 (b) 5.03 (c) 13.03 (d) 5.03 314 (a) 4.0

March 10, 2017 EX-12.1

WESTLAKE CHEMICAL PARTNERS LP RATIO OF EARNINGS TO COMBINED FIXED CHARGES (thousands of dollars) Year Ended December 31, 2016 2015 2014 2013 2012 Earnings Income Before Income Taxes $ 354,438 $ 354,525 $ 709,208 $ 846,825 $ 606,798 Fixed Charges 19,4

EX-12.1 Exhibit 12.1 WESTLAKE CHEMICAL PARTNERS LP RATIO OF EARNINGS TO COMBINED FIXED CHARGES (thousands of dollars) Year Ended December 31, 2016 2015 2014 2013 2012 Earnings Income Before Income Taxes $ 354,438 $ 354,525 $ 709,208 $ 846,825 $ 606,798 Fixed Charges 19,415 11,125 14,323 9,343 9,937 Amortization of Capitalized Interest 472 228 24 ? ? Equity Investee Distributions ? ? 4,045 5,114 4,

March 10, 2017 EX-3.4

Certificate of Incorporation of WLKP Finance Corp., dated February 21, 2017 (incorporated by reference to Exhibit 3.4 to Westlake Chemical Partners LP’s Registration Statement on Form S-3, filed on March 10, 2017, File No. 333-216617).

EX-3.4 Exhibit 3.4 CERTIFICATE OF INCORPORATION OF WLKP FINANCE CORP. FIRST: The name of the corporation is WLKP Finance Corp. (the ?Corporation?). SECOND: The address of the Corporation?s registered office in the State of Delaware is The Corporation Trust Center, 1209 Orange Street, City of Wilmington, County of New Castle, Delaware 19801. The name of its registered agent at such address is The C

March 10, 2017 S-3

Westlake Chemical Partners LP S-3

S-3 Table of Contents As filed with the Securities and Exchange Commission on March 10, 2017 Registration No.

March 10, 2017 EX-3.3

Bylaws of WLKP Finance Corp., dated February 21, 2017 (incorporated by reference to Exhibit 3.3 to Westlake Chemical Partners LP’s Registration Statement on Form S-3, filed on March 10, 2017, File No. 333-216617).

EX-3.3 Exhibit 3.3 BYLAWS OF WLKP FINANCE CORP. A Delaware Corporation Date of Adoption: February 21, 2017 TABLE OF CONTENTS Page ARTICLE I OFFICES Section 1. Registered Office 1 Section 2. Other Offices 1 ARTICLE II STOCKHOLDERS Section 1. Place of Meetings 1 Section 2. Quorum; Adjournment of Meetings 1 Section 3. Annual Meetings 2 Section 4. Special Meetings 2 Section 5. Record Date 2 Section 6.

March 7, 2017 10-K

Westlake Chemical Partners LP 10-K (Annual Report)

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

March 7, 2017 EX-21.1

SUBSIDIARIES OF WESTLAKE CHEMICAL PARTNERS LP

EX-21.1 5 ex21112311610k.htm EXHIBIT 21.1 EXHIBIT 21.1 SUBSIDIARIES OF WESTLAKE CHEMICAL PARTNERS LP Name of Subsidiary Jurisdiction Westlake Chemical OpCo GP LLC Delaware Westlake Chemical OpCo LP Delaware

March 7, 2017 EX-10.20

Exchange Agreement, effective as of August 1, 2014, by and between WPT LLC and Westlake Chemical OpCo LP (incorporated by reference to Exhibit 10.20 to Westlake Chemical Partners LP's Annual Report on Form 10-K for the year ended December 30, 2016 (File No. 01-36567) filed on March 7, 2017).

EX-10.20 4 ex102012311610k.htm EXHIBIT 10.20 WPT LLC EXHIBIT 10.20 (“Westlake” or “Party”) EXCHANGE AGREEMENT (the “Agreement”) Exchange Counterparty: Westlake Chemical OpCo LP (hereinafter “Counterparty” or “Party”) Address 2801 Post Oak Blvd, Houston TX 77056 Exchange Period/Term: August 1, 2014 through August 1, 2015 and continuing year to year thereafter, unless otherwise terminated by either

March 7, 2017 EX-10.11

Form of Phantom Unit Agreement (incorporate by reference to Exhibit 10.11 to Westlake Chemical Partners LP's Annual Report on Form 10-K for the year ended December 31, 2016 (File No. 01-36567) filed on March 7, 2017.

EX-10.11 3 ex101112311610k.htm EXHIBIT 10.11 EXHIBIT 10.11 PHANTOM UNIT AGREEMENT This Phantom Unit Agreement (this “Agreement”) is made as of [●] (the “Grant Date”) between Westlake Chemical Partners GP LLC, a Delaware limited liability company (the “General Partner”), and [●] (the “Director”) pursuant to the terms and conditions of the Westlake Chemical Partners LP Long-Term Incentive Plan (the

March 7, 2017 EX-10.10

Form of Global Amendment to Phantom Unit Agreements under the Westlake Chemical Partners LP Long-Term Incentive Plan (incorporated by reference to Exhibit 10.10 to Westlake Chemical Partners LP’s Annual Report on Form 10-K for the year ended December 31, 2016 (File No. 01-36567) filed on March 7, 2017).

EX-10.10 2 ex101012311610k.htm EXHIBIT 10.10 EXHIBIT 10.10 GLOBAL AMENDMENT TO PHANTOM UNIT AGREEMENTS UNDER THE WESTLAKE CHEMICAL PARTNERS LP LONG-TERM INCENTIVE PLAN This Global Amendment to Phantom Unit Agreements under the Westlake Chemical Partners LP Long-Term Incentive Plan is hereby adopted by Westlake Chemical Partners GP LLC, a Delaware limited liability company (the “General Partner”),

February 21, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

Document 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 21, 2017 Westlake Chemical Partners LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorpora

February 21, 2017 EX-99.1

WESTLAKE CHEMICAL PARTNERS LP

EX-99.1 2 ex991161231earningsrelease.htm EXHIBIT 99.1 EXHIBIT 99.1 WESTLAKE CHEMICAL PARTNERS LP Contact—(713) 585-2900 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Chemical Partners LP Announces Fourth Quarter and Full Year 2016 Earnings • Quarterly net income attributable to the Partnership of $10.9 million, or $0.39 per unit • Quarterly MLP distributable cash flow of $11.8 milli

February 14, 2017 SC 13G

WLKP / Westlake Chemical Partners LP / Energy Income Partners, LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. )* Westlake Chemical Partners, LP (Name of Issuer) Common Units (Title of Class of Securities) 960417103 (CUSIP Number) December 31, 2016 (Date

February 13, 2017 EX-99.1

[Signature Page—Schedule 13G Joint Filing Agreement]

EX-99.1 Exhibit 99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k)(1)(iii) of the Securities Exchange Act of 1934, each of the undersigned agrees that a single joint Schedule 13G/A and any further amendments thereto may be filed on behalf of each of the undersigned with respect to the common units held by each of them in Westlake Chemical Partners LP. Dated: February 13, 2017 WPT L

February 13, 2017 SC 13G/A

WLKP / Westlake Chemical Partners LP / WPT LLC - SC 13G AMENDMENT NO. 2 Passive Investment

SC 13G Amendment No. 2 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2) Westlake Chemical Partners LP (Name of Issuer) Common Units Representing Limited Partner Interests, No Par Value (Title of Class of Securities) 960417 103 (CUSIP Number) December 31, 2016 (Date of Event Which Requires Filing of this Statement) Ch

February 10, 2017 SC 13G/A

Westlake Chemical Partners SC 13G/A (Passive Acquisition of More Than 5% of Shares)

Harvest Fund Advisors LLC: SC 13G/A - Filed by newsfilecorp.com UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) Common Units Representing Limited Partner Interests (Title of Class of Securities) 960417103 (CUSIP Number) (Date of Event which Requires Filin

January 25, 2017 SC 13G/A

Westlake Chemical Partners SCHEDULE 13G (Passive Acquisition of More Than 5% of Shares)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* WESTLAKE CHEMICAL PARTNERS LP (Name of Issuer) Common Units (Title of Class of Securities) 960417103 (CUSIP Number) 12/31/2016 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

January 24, 2017 EX-99.1

Westlake Chemical Partners LP Statement on Publication of Final Regulations Relating to its Qualifying Income Activities

EX-99.1 Exhibit 99.1 Westlake Chemical Partners LP Statement on Publication of Final Regulations Relating to its Qualifying Income Activities ? Publication allows the final regulations issued by the Internal Revenue Service on January 19, 2017 to enter effect HOUSTON, TX ? January 24, 2017 ? On January 24, 2017, the final regulations issued by the U.S. Department of the Treasury (?Treasury?) and t

January 24, 2017 8-K

Westlake Chemical Partners LP FORM 8-K (Current Report/Significant Event)

Form 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 24, 2017 WESTLAKE CHEMICAL PARTNERS LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporat

January 23, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

Form 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 23, 2017 WESTLAKE CHEMICAL PARTNERS LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporat

January 23, 2017 EX-99.1

Westlake Chemical Partners LP Statement on the New Administration’s “Regulatory Freeze”

EX-99.1 Exhibit 99.1 Westlake Chemical Partners LP Statement on the New Administration?s ?Regulatory Freeze? HOUSTON, TX ? January 23, 2017 ? As noted in the January 19, 2017 press release issued by Westlake Chemical Partners LP (NYSE: WLKP) (the ?Partnership?), on January 19, 2017, the U.S. Department of the Treasury (?Treasury?) and the Internal Revenue Service (?IRS?) issued final regulations u

January 20, 2017 8-K

Westlake Chemical Partners LP FORM 8-K (Current Report/Significant Event)

Form 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 20, 2017 WESTLAKE CHEMICAL PARTNERS LP (Exact name of registrant as specified in its charter) Delaware 001-36567 32-0436529 (State or other jurisdiction of incorporat

January 20, 2017 EX-99.1

Westlake Chemical Partners LP Statement on Final Regulations Relating to its Qualifying Income Activities

EX-99.1 2 d331415dex991.htm EX-99.1 Exhibit 99.1 Westlake Chemical Partners LP Statement on Final Regulations Relating to its Qualifying Income Activities • Final regulations uphold previous favorable private letter ruling granted on ethylene by the Internal Revenue Service to Westlake HOUSTON, TX – January 19, 2017 – The Internal Revenue Service (“IRS”) and U.S. Department of Treasury (“Treasury”

November 23, 2016 CORRESP

Westlake Chemical Partners LP ESP

CORRESP November 23, 2016 VIA EDGAR Office of Manufacturing and Construction United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

November 9, 2016 10-Q

Westlake Chemical Partners LP 10-Q (Quarterly Report)

Document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2016 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-36567 Westlake Ch

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