FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person *   Mattina Michael J. 2. Date of Event Requiring Statement (Month/Day/Year) 04/01/2015 3. Issuer Name and Ticker or Trading Symbol WESTLAKE CHEMICAL CORP [WLK] (Last) (First) (Middle) 2801 POST OAK BLVD 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Sr. VP, Polyethylene 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) HOUSTON, TX 77056 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 7,910 D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	  (2)	  (2)	Common Stock	892	$ (1)	D	Â
Restricted Stock Units	  (3)	  (3)	Common Stock	660	$ (1)	D	Â
Restricted Stock Units	  (4)	  (4)	Common Stock	644	$ (1)	D	Â
Employee Option (Right to Buy)	  (5)	02/17/2022	Common Stock	1,334	$ 30.0525	D	Â
Employee Option (Right to Buy)	  (6)	02/15/2023	Common Stock	1,582	$ 45.6975	D	Â
Employee Option (Right to Buy)	  (7)	02/14/2024	Common Stock	2,054	$ 63.9775	D	Â
Employee Option (Right to Buy)	  (8)	02/20/2025	Common Stock	2,148	$ 68.09	D	Â
Employee Option (Right to Buy)	  (9)	02/23/2017	Common Stock	15,358	$ 15.805	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Mattina Michael J. 2801 POST OAK BLVD HOUSTON, TX 77056	Â	Â	  Sr. VP, Polyethylene	Â

Signatures

Michael J. Mattina by J. Iglesias POA		04/13/2015
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Each restricted stock unit represents a contingent right to receive one share of Westlake Chemical Corporation common stock.
(2)	The restricted stock units will vest three years from the date of grant (February 15, 2016).
(3)	The restricted stock units will vest three years from the date of grant (February 14, 2017).
(4)	The restricted stock units will vest three years from the date of grant (February 20, 2018).
(5)	The stock options are exercisable in three installments of 33%, 33%, and 34% on February 17, 2013, 2014 and 2015, respectively.
(6)	The stock options are exercisable in three installments of 33%, 33%, and 34% on February 15, 2014, 2015 and 2016, respectively.
(7)	The stock options are exercisable in three installments of 33%, 33%, and 34% on February 14, 2015, 2016 and 2017, respectively.
(8)	The stock options are exercisable in three installments of 33%, 33%, and 34% on February 20, 2016, 2017 and 2018, respectively.
(9)	The stock options are exercisable in two equal installments on February 23, 2012 and August 23, 2016.

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