Sec Form 3 Filing - Holy Jeffrey Adam @ WESTLAKE CORP - 2024-04-25

FORM 3 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 Holy Jeffrey Adam 2. Issuer Name and Ticker or Trading Symbol WESTLAKE CORP [ WLK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) VP and CAO (Last) (First) (Middle) 2801 POST OAK BLVD., SUITE 600 3. Date of Earliest Transaction (MM/DD/YY) 04/25/2024 (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 3,000 D

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) $ 107.75 ( 1 ) 02/16/2028 Common Stock 864 D Employee Option (right to buy) $ 79.83 ( 2 ) 02/15/2029 Common Stock 1,000 D Employee Option (right to buy) $ 86.5379 ( 3 ) 02/19/2031 Common Stock 671 D Employee Option (right to buy) $ 108.1175 ( 4 ) 02/18/2032 Common Stock 2,220 D Restricted Stock Units ( 6 ) ( 5 ) ( 5 ) Common Stock 702 D Employee Option (right to buy) $ 122.65 ( 7 ) 02/17/2033 Common Stock 1,927 D Restricted Stock Units ( 6 ) ( 8 ) ( 8 ) Common Stock 706 D Employee Option (right to buy) $ 144.485 ( 9 ) 02/16/2034 Common Stock 1,736 D Restricted Stock Units ( 6 ) ( 10 ) ( 10 ) Common Stock 627 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Holy Jeffrey Adam 2801 POST OAK BLVD., SUITE 600 HOUSTON, TX77056 VP and CAO Signatures Jeffrey Adam Holy by J. Feng, POA 05/02/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On February 16, 2018 the reporting person was granted 864 stock options excercisable in three installments of 33%, 33% and 34% on February 16, 2019, 2020 and 2021, respectively. ( 2 )On February 15, 2019 the reporting person was granted 2,079 stock options excercisable in three installments of 33%, 33% and 34% on February 16, 2020, 2021 and 2022, respectively. ( 3 )On February 19, 2021 the reporting person was granted 1,971 stock options excercisable in three installments of 33%, 33% and 34% on February 19, 2022, 2023 and 2024, respectively. ( 4 )On February 18, 2022 the reporting person was granted 2,220 stock options excercisable in three installments of 33%, 33% and 34% on February 18, 2023, 2024 and 2025, respectively. ( 5 )All of these restricted stock units will vest February 18, 2025. ( 6 )Each restricted stock unit represents a contingent right to recieve one share of the Issuer's common stock. ( 7 )On February 17, 2023 the reporting person was granted 1,927 stock options excercisable in three installments of 33%, 33% and 34% on February 17, 2024, 2025 and 2026, respectively. ( 8 )All of these restricted stock units will vest February 17, 2026. ( 9 )On February 16, 2024 the reporting person was granted 1,736 stock options excercisable in three installments of 33%, 33% and 34% on February 16, 2025, 2026 and 2027, respectively. ( 10 )All of these restricted stock units will vest February 16, 2027.

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).

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