Sec Form 4/A Filing - TTWFGP LLC @ WESTLAKE CHEMICAL CORP - 2020-03-13

FORM 4/A 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 TTWFGP LLC 2. Issuer Name and Ticker or Trading Symbol WESTLAKE CHEMICAL CORP [ WLK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2801 POST OAK BOULEVARD, SUITE 600 3. Date of Earliest Transaction (MM/DD/YY) 03/13/2020 (Street) HOUSTON, TX77056 4. If Amendment, Date Original Filed (MM/DD/YY) 03/16/2020 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 03/13/2020 P 160,000 A $ 32.94 ( 1 ) 160,000 ( 2 ) D ( 3 ) Common Stock 03/16/2020 P 160,000 A $ 31.42 ( 4 ) 320,000 ( 2 ) D ( 3 ) Common Stock 03/17/2020 P 165,000 A $ 33.25 ( 5 ) 485,000 ( 2 ) D ( 3 ) Common Stock 03/18/2020 P 165,000 A $ 31.41 ( 6 ) 650,000 ( 2 ) D ( 3 ) Common Stock 03/19/2020 P 165,000 A $ 37.66 ( 7 ) 815,000 ( 2 ) D ( 3 ) Common Stock 03/24/2020 P 145,000 A $ 36.53 ( 8 ) 960,000 ( 2 ) D ( 3 ) Common Stock 03/25/2020 P 130,000 A $ 40.77 ( 9 ) 1,090,000 ( 2 ) D ( 3 ) Common Stock 03/26/2020 P 145,000 A $ 41 ( 10 ) 1,235,000 ( 2 ) D ( 3 ) Common Stock 03/27/2020 P 160,000 A $ 39.08 ( 11 ) 1,395,000 ( 2 ) D ( 3 ) Common Stock 92,010,554 I TTWF LP ( 12 )

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other TTWFGP LLC 2801 POST OAK BOULEVARD, SUITE 600 HOUSTON, TX77056 X Signatures TTWFGP LLC by J. Feng, POA 08/20/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Reflects the average price of shares purchased March 13, 2020. Each line in Table I of the original Form 4, filed March 16, 2020, correctly aggregated purchases within a $1.00 price range. ( 2 )Amended to reflect total direct ownership of Issuer shares as of the original Form 4 filing date. Purchases reported on and after March 16, 2020 were erroneously added to existing indirect holdings. These indirect holdings of 46,005,227 (which correspond to a post stock-split total of 92,010,554 shares) are owned by TTWF LP and further described by footnote 12 below. ( 3 )Erroneously reported as indirect holdings. Amended to reflect direct ownership. ( 4 )Reflects the average price of shares purchased March 16, 2020. Each line in Table I of the original Form 4, filed March 17, 2020, correctly aggregated purchases within a $1.00 price range. ( 5 )Reflects the average price of shares purchased March 17, 2020. Each line in Table I of the original Form 4, filed March 18, 2020, correctly aggregated purchases within a $1.00 price range. ( 6 )Reflects the average price of shares purchased March 18, 2020. Each line in Table I of the original Form 4, filed March 19, 2020, correctly aggregated purchases within a $1.00 price range. ( 7 )Reflects the average price of shares purchased March 19, 2020 Each line in Table I of the original Form 4, filed March 20, 2020, correctly aggregated purchases within a $1.00 price range. ( 8 )Reflects the average price of shares purchased March 24, 2020. Each line in Table I of the original Form 4, filed March 25, 2020, correctly aggregated purchases within a $1.00 price range. ( 9 )Reflects the average price of shares purchased March 25, 2020. Each line in Table I of the original Form 4, filed March 26, 2020, correctly aggregated purchases within a $1.00 price range. ( 10 )Reflects the average price of shares purchased March 26, 2020. The original Form 4, filed March 27, 2020, provides weighted average pricing for each transaction within a $1.00 threshold in column 4 and related footnotes. ( 11 )Reflects the average price of shares purchased March 27, 2020. Each line in Table I of the original Form 4, filed March 30, 2020, correctly aggregated purchases within a $1.00 price range. ( 12 )92,010,554 shares of Issuer are held through TTWF LP, a Delaware limited partnership. Reporting person is the general partner of TTWF LP. Reporting Person has no direct pecuniary interest in these securities but may be deemed to beneficially own an indirect pecuniary interest in these securities.

Remarks: This Form 4A corrects the reporting person's direct ownership for filings made March 16, 17, 18, 19, 20, 25, 26, 27 and 30, 2020.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(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).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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