1. Title of Derivative Security (Instr. 4)
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2. Date Exercisable and Expiration Date (Month/Day/Year)
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3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)
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4. Conversion or Exercise Price of Derivative Security
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5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)
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6. Nature of Indirect Beneficial Ownership (Instr. 5)
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Date Exercisable
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Expiration Date
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Title
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Amount or Number of Shares
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Restricted Stock Units |
(2)
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(2)
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Common Stock |
892 |
(1)
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D |
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Restricted Stock Units |
(3)
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(3)
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Common Stock |
660 |
(1)
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D |
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Restricted Stock Units |
(4)
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(4)
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Common Stock |
644 |
(1)
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D |
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Employee Option (Right to Buy) |
(5)
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02/17/2022 |
Common Stock |
1,334 |
$30.0525 |
D |
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Employee Option (Right to Buy) |
(6)
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02/15/2023 |
Common Stock |
1,582 |
$45.6975 |
D |
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Employee Option (Right to Buy) |
(7)
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02/14/2024 |
Common Stock |
2,054 |
$63.9775 |
D |
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Employee Option (Right to Buy) |
(8)
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02/20/2025 |
Common Stock |
2,148 |
$68.09 |
D |
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Employee Option (Right to Buy) |
(9)
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02/23/2017 |
Common Stock |
15,358 |
$15.805 |
D |
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*
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If the form is filed by more than one reporting person, see Instruction 5(b)(v).
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**
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Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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(1)
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Each restricted stock unit represents a contingent right to receive one share of Westlake Chemical Corporation common stock.
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(2)
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The restricted stock units will vest three years from the date of grant (February 15, 2016).
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(3)
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The restricted stock units will vest three years from the date of grant (February 14, 2017).
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(4)
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The restricted stock units will vest three years from the date of grant (February 20, 2018).
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(5)
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The stock options are exercisable in three installments of 33%, 33%, and 34% on February 17, 2013, 2014 and 2015, respectively.
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(6)
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The stock options are exercisable in three installments of 33%, 33%, and 34% on February 15, 2014, 2015 and 2016, respectively.
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(7)
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The stock options are exercisable in three installments of 33%, 33%, and 34% on February 14, 2015, 2016 and 2017, respectively.
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(8)
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The stock options are exercisable in three installments of 33%, 33%, and 34% on February 20, 2016, 2017 and 2018, respectively.
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(9)
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The stock options are exercisable in two equal installments on February 23, 2012 and August 23, 2016.
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