8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported): June 10, 2016

WESTLAKE CHEMICAL CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	001-32260	76-0346924
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)
2801 Post Oak Boulevard, Suite 600
Houston, Texas		77056
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (713) 960-9111

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM 8.01 Other Events.

On June 10, 2016, Westlake Chemical Corporation (“Westlake”) and Axiall Corporation (“Axiall”) published a joint press release announcing the execution of an Agreement and Plan of Merger, dated as of June 10, 2016, by and among Axiall, Westlake and Lagoon Merger Sub, Inc., a wholly owned subsidiary of Westlake. A copy of the joint press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

On June 10, 2016, Westlake published a communication to Westlake employees regarding the proposed transaction. A copy of the employee communication is attached hereto as Exhibit 99.2 and is incorporated by reference herein.

On June 10, 2016, Westlake also provided supplemental information regarding the proposed transaction in connection with a presentation to investors. A copy of the investor presentation is attached hereto as Exhibit 99.3 and is incorporated by reference herein.

Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking statements within the meaning of the federal securities laws. These forward-looking statements include, but are not limited to, statements regarding Westlake Chemical Corporation’s (“Westlake”) proposed transaction to acquire Axiall Corporation (“Axiall”) (including financing of the proposed transaction and the benefits, results, effects and timing thereof), all statements regarding Westlake’s and Axiall’s (and Westlake’s and Axiall’s combined) expected future financial position, results of operations, cash flows, dividends, financing plans, business strategy, budgets, capital expenditures, competitive positions, growth opportunities, plans and objectives of management, estimated synergies from the proposed transaction and statements containing the use of forward-looking words, such as “may,” “will,” “could,” “would,” “should,” “project,” “believe,” “anticipate,” “expect,” “estimate,” “continue,” “potential,” “plan,” “forecast,” “approximate,” “intend,” “upside,” and the like, or the use of future tense. Statements contained herein concerning the business outlook or future economic performance, anticipated profitability, revenues, expenses, dividends or other financial items, and product or services line growth of Westlake and Axiall (and the combined businesses of Westlake and Axiall), together with other statements that are not historical facts, are forward-looking statements that are estimates reflecting the best judgment of Westlake or Axiall based upon currently available information. Statements concerning current conditions may also be forward-looking if they imply a continuation of current conditions.

Such forward-looking statements are inherently uncertain, and stockholders and other potential investors must recognize that actual results may differ materially from Westlake’s and/or Axiall’s expectations as a result of a variety of factors, including, without limitation, those discussed below. Such forward-looking statements are based upon management’s current expectations and include known and unknown risks, uncertainties and other factors, many of which Westlake and/or Axiall are unable to predict or control, that may cause Westlake’s and/or Axiall’s actual results, performance or plans to differ materially from any future results, performance or plans expressed or implied by such forward-looking statements. These statements involve risks, uncertainties and other factors discussed below and detailed from time to time in Westlake’s and/or Axiall’s filings with the Securities and Exchange Commission (the “SEC”).

Risks and uncertainties related to the proposed business combination transaction include, but are not limited to: (i) the ultimate outcome of the proposed transaction between Westlake and Axiall, (ii) the ultimate outcome and results of integrating the operations of Westlake and Axiall if a transaction is consummated, (iii) the ability to obtain regulatory approvals and meet other closing conditions to the proposed transaction, including any necessary stockholder approvals, (iv) potential adverse reactions or changes to business relationships resulting from the announcement, pendency or completion of the proposed transaction, (v) competitive responses to the announcement or completion of the proposed transaction, costs and difficulties related to the integration of Axiall’s businesses and operations with Westlake’s businesses and operations, (vi) the inability to obtain, or delays in obtaining, cost savings and synergies from the proposed transaction, (vii) uncertainties as to whether the completion of the proposed transaction will have the accretive effect on Westlake’s earnings or cash flows that are expected, (viii) unexpected costs, liabilities, charges or expenses resulting from the proposed transaction, (ix) litigation relating to the proposed transaction, (x) the inability to retain key personnel, (xi) potential adverse effects on Westlake’s ability to operate Westlake’s business due to the increase in Westlake’s overall debt level contemplated by the proposed transaction, (xii) potential diminished productivity due to the impact of the potential transaction on Westlake’s and/or Axiall’s current and prospective employees, key management, customers, suppliers and business partner and (xiii) any changes in general economic and/or industry-specific conditions.

In addition to the factors set forth above, other factors that may affect Westlake’s and/or Axiall’s plans, results or stock price are set forth in Westlake’s and Axiall’s respective Annual Reports on Form 10-K and reports on Forms 10-Q and 8-K.

Many of these factors are beyond Westlake’s and/or Axiall’s control. Westlake and Axiall caution investors that any forward-looking statements made by Westlake and/or Axiall are not guarantees of future performance. Westlake and Axiall do not intend, and undertake no obligation, to publish revised forward-looking statements to reflect events or circumstances after the date of this communication or to reflect the occurrence of unanticipated events.

Additional Information and Where To Find It

With respect to the 2016 Axiall annual meeting of stockholders, Axiall has filed a definitive proxy statement and other documents regarding the 2016 annual meeting of stockholders with the SEC and has mailed the definitive proxy statement and a WHITE proxy card to each stockholder of record entitled to vote at the 2016 annual meeting. With respect to the proposed merger, Axiall expects to announce a special meeting of stockholders soon to obtain stockholder approval in connection with the proposed merger between Westlake and Axiall. In connection with the special meeting, Axiall expects to file with the SEC a preliminary proxy statement and other relevant documents in connection with the proposed merger. INVESTORS OF AXIALL ARE ENCOURAGED TO READ THE DEFINITIVE PROXY STATEMENT FOR THE 2016 ANNUAL MEETING OF STOCKHOLDERS, THE PRELIMINARY PROXY STATEMENT FOR THE SPECIAL MEETING OF STOCKHOLDERS RELATED TO THE PROPOSED MERGER AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THOSE DOCUMENTS CONTAIN IMPORTANT INFORMATION. Investors and security holders may obtain the documents free of charge at the SEC’s website, www.sec.gov, and from Axiall at its website, www.axiall.com, or 1000 Abernathy Road NE, Suite 1200, Atlanta, GA 30328, Attention: General Counsel.

Participants in the Merger Solicitation

Axiall and certain of its respective directors, executive officers and other persons may be deemed to be participants in the solicitation of proxies in respect of the annual meeting of stockholders and the special meeting of stockholders. Information regarding Axiall’s directors and executive officers is available in Axiall’s proxy statement filed with the SEC on April 12, 2016 in connection with its 2016 annual meeting of stockholders. Other information regarding persons who may be deemed participants in the proxy solicitations and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the definitive proxy statement related to the proposed merger and other relevant materials to be filed with the SEC when they become available.

ITEM 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number	Description
99.1	Press Release dated June 10, 2016.
99.2	Employee Communication dated June 10, 2016.
99.3	Investor Presentation dated June 10, 2016.

1

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

WESTLAKE CHEMICAL CORPORATION
By:	/s/ Albert Chao
Name:	Albert Chao
Title:	President and Chief Executive Officer

Date: June 10, 2016

2

EXHIBIT INDEX

Exhibit Number	Description
99.1	Press Release dated June 10, 2016.
99.2	Employee Communication dated June 10, 2016.
99.3	Investor Presentation dated June 10, 2016.

EX-99.1

Exhibit 99.1

Westlake Chemical to Acquire Axiall Corporation for $33.00 Per Share in All-Cash Transaction

Combination Will Create the Third-Largest Chlor-alkali Producer and the Second-Largest PVC Producer in North America

Expected Annual Cost Synergies of Approximately $100 Million

Transaction Expected to be Accretive in the First Year Following Close

HOUSTON, TX and ATLANTA, GA – June 10, 2016 – Westlake Chemical Corporation (NYSE: WLK) and Axiall Corporation (NYSE: AXLL) today announced that they have entered into a definitive agreement under which Westlake will acquire all of the outstanding shares of Axiall for $33.00 per share in an all-cash transaction, representing an enterprise value of approximately $3.8 billion, including debt and certain other Axiall liabilities. The transaction has been unanimously approved by the Boards of Directors of both companies and is expected to be completed by the fourth quarter of 2016.

The combined company will be the third-largest chlor-alkali producer and the second-largest PVC producer in North America, with expected combined pro forma revenues of $7.6 billion and EBITDA of $1.5 billion for the last 12 months ended Q1 2016. The combination creates a stronger company with significantly increased scale, greater product diversity and integration throughout the value-chain. Westlake expects the transaction to be accretive to its earnings in the first year following close and expects annualized cost synergies of approximately $100 million based on its estimates.

Albert Chao, Westlake’s President and Chief Executive Officer, said, “This transaction aligns two remarkable companies, creates a company with greater financial and operational flexibility and accelerates our growth strategy. We believe that after this transaction we will be better able to serve our customers with a more diversified portfolio that should create significant value and growth opportunities for Westlake stockholders. We have tremendous respect for Axiall’s employees and look forward to working closely with them to achieve these goals.”

Westlake noted that, upon completion of the transaction, it looks forward to working with Lotte Chemical on its current joint venture with Axiall, LACC LLC, which is building an ethane-based ethylene plant in Lake Charles, La.

Axiall noted that the transaction is the culmination of its strategic review process to maximize stockholder value, which included the participation of multiple parties.

Timothy Mann, Jr., Axiall’s President and Chief Executive Officer, commented, “We are pleased to have reached this agreement with Westlake, which provides our stockholders with immediate recognition of the long-term value of

our company, underscoring our Board’s commitment to maximizing stockholder value. We believe this strategic combination will drive significant value for our customers and business partners as we create a North American chlorovinyls leader with a highly integrated chain, diverse product portfolio and a globally competitive cost structure. We look forward to working closely with the Westlake team to ensure a smooth transition and complete the transaction as expeditiously as possible.”

The key strategic and financial benefits of the combination of Westlake and Axiall include:

• creation of a larger, more integrated and diverse company;

• complementary geographic and product positions;

• ethylene integration into chlor-vinyls business better positions the combined company for margin capture and earnings stability;

• further downstream integration into PVC building products, which is expected to provide additional operational certainty and growth opportunities;

• expanded manufacturing presence expected to enhance future opportunities and global growth potential; and

• a strong combined balance sheet with expected investment grade metrics and flexibility to better capitalize on future investment opportunities.

Transaction Details

The transaction is subject to the approval of Axiall’s stockholders and customary closing conditions, including the expiration or termination of the applicable waiting period under the U.S. Hart-Scott-Rodino Antitrust Improvements Act. In conjunction with the merger agreement, Westlake has agreed to withdraw its nomination of a slate of director nominees at Axiall’s upcoming annual meeting of stockholders on June 17, 2016.

Westlake has received commitments from its banks in connection with the financing of the transaction.

Deutsche Bank and Goldman, Sachs & Co. are acting as financial advisors and Cleary Gottlieb Steen & Hamilton LLP is acting as legal counsel to Westlake. Morgan Stanley & Co. LLC and Barclays are acting as financial advisors and Jones Day is acting as legal counsel to Axiall. Weil, Gotshal & Manges LLP is acting as legal counsel to the Axiall board of directors.

Conference Call and Webcast

Westlake will hold a conference call to discuss the transaction at 11:00 a.m. Eastern Time on Friday, June 10, 2016. The public may access the conference call through a live audio webcast available on Westlake’s Investor Relations page at http://westlake.com/investor-relations/ir-home-page-123.html. The conference call also can be accessed by dialing (866) 547-1509 or (920) 663-6208 for international callers. The access code is 31712145. Participants should dial in approximately 15 minutes before the call. Individuals who dial in will be asked to identify themselves and their affiliations.

A replay of the call may be accessed through Westlake’s Investor Relations page, or by dialing (800) 585-8367 or (404) 537-3406 for international callers. The access code is 31712145. Archived replays of the live webcast will be available on Westlake’s Investor Relations page beginning approximately two hours after the call and will be available until Sunday, July 10, 2016 at 11:59 p.m. Eastern Time.

About Westlake Chemical Corporation

Westlake Chemical Corporation is an international manufacturer and supplier of petrochemicals, polymers and building products with headquarters in Houston, Texas. Westlake’s range of products includes: ethylene, polyethylene, styrene, propylene, caustic, VCM, PVC suspension and specialty resins and PVC building products including pipe and specialty components, windows, fence, deck and film. For more information, visit Westlake’s Web site at www.westlake.com.

About Axiall Corporation

Axiall Corporation is a leading integrated chemicals and building products company. Headquartered in Atlanta, Axiall has manufacturing facilities located throughout North America and in Asia to provide industry-leading materials and services to customers. For more information visit Axiall’s website at www.axiall.com.

Forward-Looking Statements

This communication contains forward-looking statements within the meaning of the federal securities laws. These forward-looking statements include, but are not limited to, statements regarding Westlake Chemical Corporation’s (“Westlake”) proposed transaction to acquire Axiall Corporation (“Axiall”) (including financing of the proposed transaction and the benefits, results, effects and timing thereof), all statements regarding Westlake’s and Axiall’s (and Westlake’s and Axiall’s combined) expected future financial position, results of operations, cash flows, dividends, financing plans, business strategy, budgets, capital expenditures, competitive positions, growth opportunities, plans and objectives of management, estimated synergies from the proposed transaction and statements containing the use of forward-looking words, such as “may,” “will,” “could,” “would,” “should,” “project,” “believe,” “anticipate,” “expect,” “estimate,” “continue,” “potential,” “plan,” “forecast,” “approximate,” “intend,” “upside,” and the like, or the use of future tense. Statements contained herein concerning the business outlook or future economic performance, anticipated profitability, revenues, expenses, dividends or other financial items, and product or services line growth of Westlake and Axiall (and the combined businesses of Westlake and Axiall), together with other statements that are not historical facts, are forward-looking statements that are estimates reflecting the best judgment of Westlake or Axiall based upon currently available information. Statements concerning current conditions may also be forward-looking if they imply a continuation of current conditions.

Such forward-looking statements are inherently uncertain, and stockholders and other potential investors must recognize that actual results may differ materially from Westlake’s and/or Axiall’s expectations as a result of a variety of factors, including, without limitation, those discussed below. Such forward-looking statements are based upon management’s current expectations and include known and unknown risks, uncertainties and other factors,

many of which Westlake and/or Axiall are unable to predict or control, that may cause Westlake’s and/or Axiall’s actual results, performance or plans to differ materially from any future results, performance or plans expressed or implied by such forward-looking statements. These statements involve risks, uncertainties and other factors discussed below and detailed from time to time in Westlake’s and/or Axiall’s filings with the Securities and Exchange Commission (the “SEC”).

Risks and uncertainties related to the proposed business combination transaction include, but are not limited to: (i) the ultimate outcome of the proposed transaction between Westlake and Axiall, (ii) the ultimate outcome and results of integrating the operations of Westlake and Axiall if a transaction is consummated, (iii) the ability to obtain regulatory approvals and meet other closing conditions to the proposed transaction, including any necessary stockholder approvals, (iv) potential adverse reactions or changes to business relationships resulting from the announcement, pendency or completion of the proposed transaction, (v) competitive responses to the announcement or completion of the proposed transaction, costs and difficulties related to the integration of Axiall’s businesses and operations with Westlake’s businesses and operations, (vi) the inability to obtain, or delays in obtaining, cost savings and synergies from the proposed transaction, (vii) uncertainties as to whether the completion of the proposed transaction will have the accretive effect on Westlake’s earnings or cash flows that are expected, (viii) unexpected costs, liabilities, charges or expenses resulting from the proposed transaction, (ix) litigation relating to the proposed transaction, (x) the inability to retain key personnel, (xi) potential adverse effects on Westlake’s ability to operate Westlake’s business due to the increase in Westlake’s overall debt level contemplated by the proposed transaction, (xii) potential diminished productivity due to the impact of the potential transaction on Westlake’s and/or Axiall’s current and prospective employees, key management, customers, suppliers and business partner and (xiii) any changes in general economic and/or industry-specific conditions.

In addition to the factors set forth above, other factors that may affect Westlake’s and/or Axiall’s plans, results or stock price are set forth in Westlake’s and Axiall’s respective Annual Reports on Form 10-K and reports on Forms 10-Q and 8-K.

Many of these factors are beyond Westlake’s and/or Axiall’s control. Westlake and Axiall caution investors that any forward-looking statements made by Westlake and/or Axiall are not guarantees of future performance. Westlake and Axiall do not intend, and undertake no obligation, to publish revised forward-looking statements to reflect events or circumstances after the date of this communication or to reflect the occurrence of unanticipated events.

Additional Information and Where To Find It

With respect to the 2016 Axiall annual meeting of stockholders, Axiall has filed a definitive proxy statement and other documents regarding the 2016 annual meeting of stockholders with the SEC and has mailed the definitive proxy statement and a WHITE proxy card to each stockholder of record entitled to vote at the 2016 annual meeting. With respect to the proposed merger, Axiall expects to announce a special meeting of stockholders soon to obtain stockholder approval in connection with the proposed merger between Westlake and Axiall. In connection with the special meeting, Axiall expects to file with the SEC a preliminary proxy statement and other relevant documents in connection with the proposed merger. INVESTORS OF AXIALL ARE ENCOURAGED TO READ THE DEFINITIVE

PROXY STATEMENT FOR THE 2016 ANNUAL MEETING OF STOCKHOLDERS, THE PRELIMINARY PROXY STATEMENT FOR THE SPECIAL MEETING OF STOCKHOLDERS RELATED TO THE PROPOSED MERGER AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THOSE DOCUMENTS CONTAIN IMPORTANT INFORMATION. Investors and security holders may obtain the documents free of charge at the SEC’s website, www.sec.gov, and from Axiall at its website, www.axiall.com, or 1000 Abernathy Road NE, Suite 1200, Atlanta, GA 30328, Attention: General Counsel.

Participants in the Merger Solicitation

Axiall and certain of its respective directors, executive officers and other persons may be deemed to be participants in the solicitation of proxies in respect of the annual meeting of stockholders and the special meeting of stockholders. Information regarding Axiall’s directors and executive officers is available in Axiall’s proxy statement filed with the SEC on April 12, 2016 in connection with its 2016 annual meeting of stockholders. Other information regarding persons who may be deemed participants in the proxy solicitations and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the definitive proxy statement related to the proposed merger and other relevant materials to be filed with the SEC when they become available.

Contacts

Westlake:

Media Inquiries:

Sard Verbinnen & Co

Jim Barron / Robin Weinberg, (212) 687-8080

jbarron@sardverb.com / rweinberg@sardverb.com

Investor Inquiries:

Westlake Chemical Corp.

Steve Bender, (713) 960-9111

or

MacKenzie Partners

Dan Burch / Charlie Koons, (212) 929-5708

dburch@mackenziepartners.com / ckoons@mackenziepartners.com

Axiall:

Media Inquiries:

Axiall Corporation

Chip Swearngan, (678) 507-0554

or

Joele Frank, Wilkinson Brimmer Katcher

Joele Frank / Michael Freitag / Averell Withers, (212) 355-4449

Investor Inquiries:

Axiall Corporation

Martin Jarosick, (770) 395-4524

EX-99.2

Exhibit 99.2

DATE:	June 10, 2016
TO:	All Westlake Employees
FROM:	Albert Chao
RE:	Westlake Announces Definitive Agreement to Acquire Axiall

Today, we announced that we have entered into a definitive agreement to acquire Atlanta-based Axiall Corporation.

Axiall is a leading North American manufacturer and international marketer of integrated chlorovinyls and vinyl-based building and home improvement products. Axiall has approximately 4,700 employees across more than 40 locations in North America, as well as joint ventures in China and India. In 2015, Axiall generated $3.4 billion in net sales.

We are excited about this transaction because the combination of Axiall and Westlake will create a more diversified and competitive company that is better positioned to succeed and grow in this challenging environment. With Westlake’s Olefins business and a combined Westlake/Axiall Vinyls business, there are immediate opportunities to apply our strategy of vertical integration, while improving operations by sharing best practices and synergies across both companies.

The transaction is expected to close by the fourth quarter, subject to standard closing conditions. We encourage you to view our press release to learn more about Axiall and this transaction.

I ask you to remain focused on the safe and reliable operation of our facilities and providing our customers with the exceptional service and high quality products that they have come to expect of us.

As we begin the process of planning to integrate the two companies after close, we will continue to keep you informed as developments occur.

We look forward to welcoming the Axiall employees into the Westlake family.

Forward-Looking Statements

This communication contains forward-looking statements within the meaning of the federal securities laws. These forward-looking statements include, but are not limited to, statements regarding Westlake Chemical Corporation’s

(“Westlake”) proposed transaction to acquire Axiall Corporation (“Axiall”) (including financing of the proposed transaction and the benefits, results, effects and timing thereof), all statements regarding Westlake’s and Axiall’s (and Westlake’s and Axiall’s combined) expected future financial position, results of operations, cash flows, dividends, financing plans, business strategy, budgets, capital expenditures, competitive positions, growth opportunities, plans and objectives of management, estimated synergies from the proposed transaction and statements containing the use of forward-looking words, such as “may,” “will,” “could,” “would,” “should,” “project,” “believe,” “anticipate,” “expect,” “estimate,” “continue,” “potential,” “plan,” “forecast,” “approximate,” “intend,” “upside,” and the like, or the use of future tense. Statements contained herein concerning the business outlook or future economic performance, anticipated profitability, revenues, expenses, dividends or other financial items, and product or services line growth of Westlake and Axiall (and the combined businesses of Westlake and Axiall), together with other statements that are not historical facts, are forward-looking statements that are estimates reflecting the best judgment of Westlake or Axiall based upon currently available information. Statements concerning current conditions may also be forward-looking if they imply a continuation of current conditions.

Such forward-looking statements are inherently uncertain, and stockholders and other potential investors must recognize that actual results may differ materially from Westlake’s and/or Axiall’s expectations as a result of a variety of factors, including, without limitation, those discussed below. Such forward-looking statements are based upon management’s current expectations and include known and unknown risks, uncertainties and other factors, many of which Westlake and/or Axiall are unable to predict or control, that may cause Westlake’s and/or Axiall’s actual results, performance or plans to differ materially from any future results, performance or plans expressed or implied by such forward-looking statements. These statements involve risks, uncertainties and other factors discussed below and detailed from time to time in Westlake’s and/or Axiall’s filings with the Securities and Exchange Commission (the “SEC”).

Risks and uncertainties related to the proposed business combination transaction include, but are not limited to: (i) the ultimate outcome of the proposed transaction between Westlake and Axiall, (ii) the ultimate outcome and results of integrating the operations of Westlake and Axiall if a transaction is consummated, (iii) the ability to obtain regulatory approvals and meet other closing conditions to the proposed transaction, including any necessary stockholder approvals, (iv) potential adverse reactions or changes to business relationships resulting from the announcement, pendency or completion of the proposed transaction, (v) competitive responses to the announcement or completion of the proposed transaction, costs and difficulties related to the integration of Axiall’s businesses and operations with Westlake’s businesses and operations, (vi) the inability to obtain, or delays in obtaining, cost savings and synergies from the proposed transaction, (vii) uncertainties as to whether the completion of the proposed transaction will have the accretive effect on Westlake’s earnings or cash flows that are expected, (viii) unexpected costs, liabilities, charges or expenses resulting from the proposed transaction, (ix) litigation relating to the proposed transaction, (x) the inability to retain key personnel, (xi) potential adverse effects on Westlake’s ability to operate Westlake’s business due to the increase in Westlake’s overall debt level

contemplated by the proposed transaction, (xii) potential diminished productivity due to the impact of the potential transaction on Westlake’s and/or Axiall’s current and prospective employees, key management, customers, suppliers and business partner and (xiii) any changes in general economic and/or industry-specific conditions.

In addition to the factors set forth above, other factors that may affect Westlake’s and/or Axiall’s plans, results or stock price are set forth in Westlake’s and Axiall’s respective Annual Reports on Form 10-K and reports on Forms 10-Q and 8-K.

Many of these factors are beyond Westlake’s and/or Axiall’s control. Westlake and Axiall caution investors that any forward-looking statements made by Westlake and/or Axiall are not guarantees of future performance. Westlake and Axiall do not intend, and undertake no obligation, to publish revised forward-looking statements to reflect events or circumstances after the date of this communication or to reflect the occurrence of unanticipated events.

Additional Information and Where To Find It

With respect to the 2016 Axiall annual meeting of stockholders, Axiall has filed a definitive proxy statement and other documents regarding the 2016 annual meeting of stockholders with the SEC and has mailed the definitive proxy statement and a WHITE proxy card to each stockholder of record entitled to vote at the 2016 annual meeting. With respect to the proposed merger, Axiall expects to announce a special meeting of stockholders soon to obtain stockholder approval in connection with the proposed merger between Westlake and Axiall. In connection with the special meeting, Axiall expects to file with the SEC a preliminary proxy statement and other relevant documents in connection with the proposed merger. INVESTORS OF AXIALL ARE ENCOURAGED TO READ THE DEFINITIVE PROXY STATEMENT FOR THE 2016 ANNUAL MEETING OF STOCKHOLDERS, THE PRELIMINARY PROXY STATEMENT FOR THE SPECIAL MEETING OF STOCKHOLDERS RELATED TO THE PROPOSED MERGER AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THOSE DOCUMENTS CONTAIN IMPORTANT INFORMATION. Investors and security holders may obtain the documents free of charge at the SEC’s website, www.sec.gov, and from Axiall at its website, www.axiall.com, or 1000 Abernathy Road NE, Suite 1200, Atlanta, GA 30328, Attention: General Counsel.

Participants in the Merger Solicitation

Axiall and certain of its respective directors, executive officers and other persons may be deemed to be participants in the solicitation of proxies in respect of the annual meeting of stockholders and the special meeting of stockholders. Information regarding Axiall’s directors and executive officers is available in Axiall’s proxy statement filed with the SEC on April 12, 2016 in connection with its 2016 annual meeting of stockholders. Other

information regarding persons who may be deemed participants in the proxy solicitations and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the definitive proxy statement related to the proposed merger and other relevant materials to be filed with the SEC when they become available.

EX-99.3

Creation of a North American Olefins and Vinyls Leader June 10, 2016 Westlake Chemical to Acquire Axiall Corporation 1 Exhibit 99.3

Forward-Looking Statements This communication contains forward-looking statements within the meaning of the federal securities laws. These forward-looking statements include, but are not limited to, statements regarding Westlake Chemical Corporation’s (“Westlake”) proposed transaction to acquire Axiall Corporation (“Axiall”) (including financing of the proposed transaction and the benefits, results, effects and timing thereof), all statements regarding Westlake’s and Axiall’s (and Westlake’s and Axiall’s combined) expected future financial position, results of operations, cash flows, dividends, financing plans, business strategy, budgets, capital expenditures, competitive positions, growth opportunities, plans and objectives of management, estimated synergies from the proposed transaction and statements containing the use of forward-looking words, such as “may,” “will,” “could,” “would,” “should,” “project,” “believe,” “anticipate,” “expect,” “estimate,” “continue,” “potential,” “plan,” “forecast,” “approximate,” “intend,” “upside,” and the like, or the use of future tense. Statements contained herein concerning the business outlook or future economic performance, anticipated profitability, revenues, expenses, dividends or other financial items, and product or services line growth of Westlake and Axiall (and the combined businesses of Westlake and Axiall), together with other statements that are not historical facts, are forward-looking statements that are estimates reflecting the best judgment of Westlake or Axiall based upon currently available information. Statements concerning current conditions may also be forward-looking if they imply a continuation of current conditions. Such forward-looking statements are inherently uncertain, and stockholders and other potential investors must recognize that actual results may differ materially from Westlake’s and/or Axiall’s expectations as a result of a variety of factors, including, without limitation, those discussed below. Such forward-looking statements are based upon management’s current expectations and include known and unknown risks, uncertainties and other factors, many of which Westlake and/or Axiall are unable to predict or control, that may cause Westlake’s and/or Axiall’s actual results, performance or plans to differ materially from any future results, performance or plans expressed or implied by such forward-looking statements. These statements involve risks, uncertainties and other factors discussed below and detailed from time to time in Westlake’s and/or Axiall’s filings with the Securities and Exchange Commission (the “SEC”). Risks and uncertainties related to the proposed business combination transaction include, but are not limited to: (i) the ultimate outcome of the proposed transaction between Westlake and Axiall, (ii) the ultimate outcome and results of integrating the operations of Westlake and Axiall if a transaction is consummated, (iii) the ability to obtain regulatory approvals and meet other closing conditions to the proposed transaction, including any necessary stockholder approvals, (iv) potential adverse reactions or changes to business relationships resulting from the announcement, pendency or completion of the proposed transaction, (v) competitive responses to the announcement or completion of the proposed transaction, costs and difficulties related to the integration of Axiall’s businesses and operations with Westlake’s businesses and operations, (vi) the inability to obtain, or delays in obtaining, cost savings and synergies from the proposed transaction, (vii) uncertainties as to whether the completion of the proposed transaction will have the accretive effect on Westlake’s earnings or cash flows that are expected, (viii) unexpected costs, liabilities, charges or expenses resulting from the proposed transaction, (ix) litigation relating to the proposed transaction, (x) the inability to retain key personnel, (xi) potential adverse effects on Westlake’s ability to operate Westlake’s business due to the increase in Westlake’s overall debt level contemplated by the proposed transaction, (xii) potential diminished productivity due to the impact of the potential transaction on Westlake’s and/or Axiall’s current and prospective employees, key management, customers, suppliers and business partner and (xiii) any changes in general economic and/or industry-specific conditions. In addition to the factors set forth above, other factors that may affect Westlake’s and/or Axiall’s plans, results or stock price are set forth in Westlake’s and Axiall’s respective Annual Reports on Form 10-K and reports on Forms 10-Q and 8-K. Many of these factors are beyond Westlake’s and/or Axiall’s control. Westlake and Axiall caution investors that any forward-looking statements made by Westlake and/or Axiall are not guarantees of future performance. Westlake and Axiall do not intend, and undertake no obligation, to publish revised forward-looking statements to reflect events or circumstances after the date of this communication or to reflect the occurrence of unanticipated events. 2

Additional Information and Where To Find It With respect to the 2016 Axiall annual meeting of stockholders, Axiall has filed a definitive proxy statement and other documents regarding the 2016 annual meeting of stockholders with the SEC and has mailed the definitive proxy statement and a WHITE proxy card to each stockholder of record entitled to vote at the 2016 annual meeting. With respect to the proposed merger, Axiall expects to announce a special meeting of stockholders soon to obtain stockholder approval in connection with the proposed merger between Westlake and Axiall. In connection with the special meeting, Axiall expects to file with the SEC a preliminary proxy statement and other relevant documents in connection with the proposed merger. INVESTORS OF AXIALL ARE ENCOURAGED TO READ THE DEFINITIVE PROXY STATEMENT FOR THE 2016 ANNUAL MEETING OF STOCKHOLDERS, THE PRELIMINARY PROXY STATEMENT FOR THE SPECIAL MEETING OF STOCKHOLDERS RELATED TO THE PROPOSED MERGER AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THOSE DOCUMENTS CONTAIN IMPORTANT INFORMATION. Investors and security holders may obtain the documents free of charge at the SEC’s website, www.sec.gov, and from Axiall at its website, www.axiall.com, or 1000 Abernathy Road NE, Suite 1200, Atlanta, GA 30328, Attention: General Counsel. Participants in the Merger Solicitation Axiall and certain of its respective directors, executive officers and other persons may be deemed to be participants in the solicitation of proxies in respect of the annual meeting of stockholders and the special meeting of stockholders. Information regarding Axiall’s directors and executive officers is available in Axiall’s proxy statement filed with the SEC on April 12, 2016 in connection with its 2016 annual meeting of stockholders. Other information regarding persons who may be deemed participants in the proxy solicitations and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the definitive proxy statement related to the proposed merger and other relevant materials to be filed with the SEC when they become available. 3

A Value Creating Combination Combination creates a North American Olefins and Vinyls leader #2 North American PVC capacity #3 North American Chlor-Alkali capacity Consistent with Westlake’s vertical integration strategy Combination expected to enhance margin stability Better positioned to capture value throughout the chain and earnings cycle Further downstream integration into PVC building products provides additional operational certainty and growth opportunities Complementary geographic and product positions Expanded manufacturing presence expected to enhance future opportunities and global growth potential Expected annual cost synergies of $100 million Transaction expected to be accretive in the first year following close 4 Source:IHS Chemical

Axiall is a Leader in Chlorovinyls and Building Products 5 A leading North American manufacturer and marketer of integrated chlorovinyls and vinyl-based building products One of the lowest cost producers of chlor-alkali and derivative products in the world Products include: Chlorine Caustic soda Vinyl chloride monomer (VCM) Vinyl resins Vinyl compounds Plasticizers Key Statistics $3.3B 2016 Q1 LTM Revenue $313MM 2016 Q1 LTM Adjusted EBITDA(a) 4,700 Employees(b) Chlorovinyls (~75% of sales) Transform products from nature – salt, water and natural gas – into chlorine and caustic soda End-use applications: plastic pipe and pipe fittings, siding and window frames, high-quality plastics, and coating for wire and cable, paper, minerals, metals and water treatment industries Building Products (~25% of sales) Offers a broad portfolio of innovative, low-maintenance and highly durable vinyl building materials Products: trim, moldings, deck, siding, pipe and pipe fittings products (a)Adjusted EBITDA based on Q1 3/31/2016 LTM (b)As of May 2016

Transaction Overview Structure and Consideration $33.00 in cash per Axiall share 9% premium over 52-week average before January 28, 2016 18% discount to 52-week high(a) Represents an enterprise value of approximately $3.8 billion including the assumption of certain Axiall liabilities 6.1x Axiall Cycle Average Adjusted EBITDA including expected synergies(b)(c) Financing Westlake to assume approximately $1.4 billion of Axiall debt No financing contingency with fully committed bridge facility of approximately $1.8 billion in place Westlake committed to maintaining investment grade credit ratings Conditions Expected to Closing No anticipated regulatory issues (HSR and Canadian Antitrust approval required) Axiall shareholder vote required Transaction expected to close by Q4 2016 6 (a)Based on intraday high (b)Cycle Average Adjusted EBITDA of approximately $523m, estimated using average Adjusted EBITDA over 2010-2015 based on publicly available disclosure (c)Multiple reflects $100m in anticipated annual synergies Source: Company SEC filings, FactSet

Highly Integrated Chain in the U.S. Enhances Margin Stability for the Combined Company Key Combination Highlights 7 Creates a North American Chlorovinyls Leader with Enhanced Scale Value Creation by Capturing Synergy Opportunities Combination Builds on Westlake's History of Integration and Strategic Growth Strong Financial Profile 1 2 3 4 5

Creates North American Chlorovinyls Leader with Enhanced Scale 8 + (a)Based on Q1 3/31/2016 LTM Source:IHS Chemical, Company SEC filings North American PVC capacity North American Chlor-Alkali capacity Net sales (LTM Q1 2016, $ in millions)(a) 1

v Highly Integrated Chain in the U.S. Enhances Margin Stability for the Combined Company (a) Time period is 2005-2015 Source:IHS Chemical Polyethylene Styrene Chlorine Ethylene Vinyls PVC Building Products All gas-based feedstock capability Ethylene Expansion Typical Vinyls industry margin distribution over the last cycle(a) The combined company is expected to have a lower cost structure due to integration which enhances margin stability Expansion Olefins Vinyls 9 2

Sales & Marketing Manufacturing General & Administrative Procurement / Supply Chain Value Creation by Capturing Synergy Opportunities Improved product mix Increased global sales channels Eliminate duplicative G&A costs, including public company expenses Drive best practices corporate wide Ethylene / natural gas supply chain optimization Procurement optimization Freight logistics efficiencies Expected $100MM annual synergies Best practices across manufacturing footprint Access to Westlake’s global leadership in vinyls technology 10 3

Acquired Axiall Petro 1 Ethylene Expansion Capacity (MM lbs.) Vinyls Olefins Company Begins Operation in LC Acquired VCM in Calvert Started Petro 1 Acquired PVC Plant Acquired Geismar VCM/PVC Plant Acquired 1 Pipe Plant Acquired 3 Pipe Plants; Calgary Window Plant Start Suzhou China Film Plant Increased LDPE By 500 MM/lbs Acquired CAO Started Petro 2 Started Poly 3 Started Suzhou PVC Plant Acquired NY Windows Plant Started Styrene Acquired 3 Pipe Plants IPO 20th Anniversary Acquired Longview Acquired Vinnolit, Calvert City Ethylene / PVC Expansion 1986 to 2015 Capacity CAGR of 15.3% 11 4 Combination Builds on Westlake's History of Integration and Strategic Growth Acquired Certain Teed, Petro 2 Ethylene & Geismar Chlor Alkali Expansion Note:Axiall capacity includes PVC and Chlorine based on IHS Chemical North American capacity Source:IHS Chemical

Strong Financial Profile 12 Expected strong financial profile and significant cash generation from combined company with the benefit of synergies Transaction expected to be accretive in the first year following close Westlake committed to investment grade credit ratings and continued conservative financial policy Transaction also supported by Westlake’s large cash balance position and unlevered balance sheet 5

A Value Creating Combination Combination creates a North American Olefins and Vinyls leader Consistent with Westlake’s vertical integration strategy Complementary geographic and product positions Expanded manufacturing presence expected to enhance future opportunities and global growth potential Expected annual cost synergies of $100 million Transaction expected to be accretive in the first year following close 13

Q & A 14