Sec Form 4 Filing - Chao Albert @ WESTLAKE CHEMICAL CORP - 2012-11-26

Insider filing report for Changes in Beneficial Ownership
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FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
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
Chao Albert
2. Issuer Name and Ticker or Trading Symbol
WESTLAKE CHEMICAL CORP [ WLK]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X __ Director X __ 10% Owner
X __ Officer (give title below) _____ Other (specify below)
President & CEO
(Last) (First) (Middle)
2801 POST OAK BLVD.
3. Date of Earliest Transaction (MM/DD/YY)
11/26/2012
(Street)
HOUSTON, TX77056
4. If Amendment, Date Original Filed (MM/DD/YY)
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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 11/26/2012 M 35,400 A $ 14.5 175,275 D
Common Stock 11/26/2012 M 8,547 A $ 27.22 183,822 D
Common Stock 11/26/2012 M 4,514 A $ 36.1 188,336 D
Common Stock 11/26/2012 M 42,579 A $ 14.235 230,915 D
Common Stock 11/26/2012 S 30,699 D $ 75 200,216 D
Common Stock 11/26/2012 S 879 D $ 75.02 199,337 D
Common Stock 11/26/2012 S 21 D $ 75.03 199,316 D
Common Stock 11/26/2012 S 100 D $ 75.1 199,216 D
Common Stock 11/26/2012 S 3,800 D $ 75.3 195,416 D
Common Stock 11/26/2012 S 100 D $ 75.35 195,316 D
Common Stock 11/26/2012 S 100 D $ 75.4 195,216 D
Common Stock 11/26/2012 S 900 D $ 75.41 194,316 D
Common Stock 11/26/2012 S 100 D $ 75.43 194,216 D
Common Stock 11/26/2012 S 2,000 D $ 75.5 192,216 D
Common Stock 11/26/2012 S 600 D $ 75.63 191,616 D
Common Stock 11/26/2012 S 1,160 D $ 75.6301 190,456 D
Common Stock 11/26/2012 S 100 D $ 75.66 190,356 D
Common Stock 11/26/2012 S 210 D $ 75.6601 190,146 D
Common Stock 11/26/2012 S 100 D $ 75.72 190,046 D
Common Stock 11/26/2012 S 300 D $ 75.73 189,746 D
Common Stock 11/26/2012 S 400 D $ 75.79 189,346 D
Common Stock 11/26/2012 S 30 D $ 75.795 189,316 D
Common Stock 11/26/2012 S 100 D $ 75.825 189,216 D
Common Stock 11/26/2012 S 4,314 D $ 75.87 184,902 D
Common Stock 11/26/2012 S 300 D $ 75.88 184,602 D
Common Stock 11/26/2012 S 100 D $ 75.89 184,502 D
Common Stock 11/26/2012 S 200 D $ 75.92 184,302 D
Common Stock 20,000 I By Mother ( 1 )
Common Stock 115,842 I By Brother James Chao ( 2 )
Common Stock 46,005,277 I TTWF LP & TTWFGP LLC Trusts
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(MM/DD/YY)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Option (right to buy) $ 14.5 11/26/2012 M 35,400 08/16/2007 08/16/2014 Common Stock 35,400 $ 0 0 D
Employee Option (right to buy) $ 27.22 11/26/2012 M 8,547 08/31/2009 08/31/2015 Common Stock 8,547 $ 0 0 D
Employee Option (right to buy) $ 36.1 11/26/2012 M 4,514 03/15/2010 03/15/2016 Common Stock 4,514 $ 0 0 D
Employee Option (right to buy) $ 14.235 11/26/2012 M 42,579 02/13/2012 02/13/2019 Common Stock 42,579 $ 0 77,946 D
Reporting Owners
Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Chao Albert
2801 POST OAK BLVD.
HOUSTON, TX77056
X X President & CEO
Signatures
Albert Chao by Richard C. Kroger POA 11/28/2012
Signature of Reporting Person Date
Explanation of Responses:
( 1 )The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.
( 2 )The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

Remarks:
46,005,277 shares are held through TTWF LP, a Delaware limited partnership. Two trusts for the benefit of members of the Chao family, including the reporting person, are the managers of TTWFGP LLC, a Delaware limited liability company that is the general partner of TTWF LP. The limited partners of TTWF LP are five trusts, principally for the benefit of members of the Chao family, including the reporting person, and two corporations owned, indirectly or directly, by certain of these trusts and by other entities owned by members of the Chao family, including the reporting person. The reporting person shares investment and voting power with respect to the shares beneficially owned by TTWF LP. The reporting person disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein.

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