{"transactions":[{"id":887724,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-02-23T19:41:33.000Z","date":"2026-02-20","kind":"grant","planned":false,"acquired":true,"shares":2434,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each restricted stock unit (\"RSU\") represents a contingent right to recieve one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"All of the RSUs will vest on February 20, 2029."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"All of the RSUs will vest on February 20, 2029."}],"balance_after":2434,"derivative":{"underlying":"Common Stock","underlying_shares":2434},"source":{"system":"sec-edgar","filing":"0001193125-26-063669","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000119312526063669/ownership.xml","form_type":"4"}},{"id":887723,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-02-23T19:41:33.000Z","date":"2026-02-20","kind":"grant","planned":false,"acquired":true,"shares":1104,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each restricted stock unit (\"RSU\") represents a contingent right to recieve one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"All of the RSUs will vest on February 20, 2029."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"All of the RSUs will vest on February 20, 2029."}],"balance_after":1104,"derivative":{"underlying":"Common Stock","underlying_shares":1104},"source":{"system":"sec-edgar","filing":"0001193125-26-063669","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000119312526063669/ownership.xml","form_type":"4"}},{"id":887722,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Employee Option (right to buy)","published_at":"2026-02-23T19:41:33.000Z","date":"2026-02-20","kind":"grant","planned":false,"acquired":true,"shares":4044,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The stock options are excercisable in three installments of 33%, 33% and 34% on February 20, 2027, 2028 and 2029, respectively."}],"balance_after":4044,"derivative":{"exercise_price":94.48,"expiration_date":"2036-02-20","underlying":"Common Stock","underlying_shares":4044},"source":{"system":"sec-edgar","filing":"0001193125-26-063669","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000119312526063669/ownership.xml","form_type":"4"}},{"id":887721,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-23T19:41:33.000Z","date":"2026-02-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":91,"price":94.1,"value":8563.1,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares otherwise issuable were witheld to satisfy tax obligations arising out of vesting of the Reporting Person's PSUs."}],"balance_after":7888,"source":{"system":"sec-edgar","filing":"0001193125-26-063669","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000119312526063669/ownership.xml","form_type":"4"}},{"id":887720,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-23T19:41:33.000Z","date":"2026-02-19","kind":"grant","planned":false,"acquired":true,"shares":213,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of common stock that vested on February 19, 2026, upon the determination by the Compensation Committee of the Issuer's Board of Directors of the satisfaction of performance criteria underlying an award of performance stock units (\"PSUs\") granted to the Reporting Person on February 17, 2023, under the terms of the Issuer's 2013 Omnibus Incentive Plan."}],"balance_after":7979,"source":{"system":"sec-edgar","filing":"0001193125-26-063669","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000119312526063669/ownership.xml","form_type":"4"}},{"id":892974,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-02-19T20:19:23.000Z","date":"2026-02-17","kind":"exercise","planned":false,"acquired":false,"shares":570,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted stock units (\"RSUs\") convert into the Issuer's common stock on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On February 17, 2023, the reporting person was granted 570 RSUs vesting on the third anniversay of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"On February 17, 2023, the reporting person was granted 570 RSUs vesting on the third anniversay of the grant date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":570},"source":{"system":"sec-edgar","filing":"0001193125-26-059212","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000119312526059212/ownership.xml","form_type":"4"}},{"id":892973,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-19T20:19:23.000Z","date":"2026-02-18","kind":"tax_withholding","planned":false,"acquired":false,"shares":242,"price":98.95,"value":23945.9,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Shares otherwise issuable were withheld to satisfy tax obligations arising out of the vesting of the reporting persons RSUs."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Following a reconciliation of the reporting person's ownership records, the balance includes 400 shares that were inadvertently omitted from the reporting person's prior Form 4s."}],"balance_after":7766,"source":{"system":"sec-edgar","filing":"0001193125-26-059212","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000119312526059212/ownership.xml","form_type":"4"}},{"id":892972,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-19T20:19:23.000Z","date":"2026-02-17","kind":"exercise","planned":false,"acquired":true,"shares":570,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock units (\"RSUs\") convert into the Issuer's common stock on a one-for-one basis."}],"balance_after":7608,"source":{"system":"sec-edgar","filing":"0001193125-26-059212","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000119312526059212/ownership.xml","form_type":"4"}},{"id":1217117,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-03-07T12:00:04.000Z","date":"2025-03-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":391,"price":108.62,"value":42470.42,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The original Form 4 filed by the Reporting Person on February 24, 2025 is amended by this Form 4A to disclose that 391 shares of common stock were sold to cover tax withholding obligations arising out of the vesting of the Reporting Person's Performace Stock Units. The original Form 4 did not report the sale to cover tax withholding obligations because the number of shares to be sold was not known at the time of filing. This Form 4A is in addition to, and does not replace, the disclosure contained in the original Form 4"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The amount of common stock beneficially owned by the Reporting Person reflects adjustments for subsquent transactions reported on Form4A filed March 6, 2025, reflects the total owned subsquent to the tax witholding obligation of 391 shares, and is the total owned as of today, March 7, 2025."}],"balance_after":7038,"source":{"system":"sec-edgar","filing":"0000950170-25-035137","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017025035137/ownership.xml","form_type":"4/A","original_submission_date":"2025-02-24"}},{"id":1217116,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-03-07T12:00:04.000Z","date":"2025-02-20","kind":"grant","planned":false,"acquired":true,"shares":955,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":7664,"source":{"system":"sec-edgar","filing":"0000950170-25-035137","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017025035137/ownership.xml","form_type":"4/A","original_submission_date":"2025-02-24"}},{"id":1219289,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-03-06T14:05:48.000Z","date":"2025-03-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":235,"price":108.62,"value":25525.7,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The original Form 4 filed by the Reporting Person on February 20, 2025 is amended by this Form 4A to disclose that 235 shares of common stock were sold to satisfy tax obligations arising out of the vesting of the reporting persons Restricted Stock Units. The original Form 4 did not report the sale to cover tax withholding obligations because the number of shares to be sold was not known at the time of filing. This Form 4A is in addition to, and does not replace, the disclosure contained in the original Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The amount of common stock beneficially owned by the Reporting Person relfects adjustments for subsquent transactions reported on February 24, 2025 and reflects the total owned subsquent to the tax witholding obligation of 235 shares."}],"balance_after":7429,"source":{"system":"sec-edgar","filing":"0000950170-25-034210","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017025034210/ownership.xml","form_type":"4/A","original_submission_date":"2025-02-20"}},{"id":1219288,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-03-06T14:05:48.000Z","date":"2025-02-18","kind":"exercise","planned":false,"acquired":true,"shares":513,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":6709,"source":{"system":"sec-edgar","filing":"0000950170-25-034210","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017025034210/ownership.xml","form_type":"4/A","original_submission_date":"2025-02-20"}},{"id":1249262,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-02-24T19:14:44.000Z","date":"2025-02-21","kind":"grant","planned":false,"acquired":true,"shares":919,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit (\"RSU\") represents a contingent right to recieve one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"All of the RSUs will vest on February 21, 2028."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"All of the RSUs will vest on February 21, 2028."}],"balance_after":919,"derivative":{"underlying":"Common Stock","underlying_shares":919},"source":{"system":"sec-edgar","filing":"0000950170-25-025490","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017025025490/ownership.xml","form_type":"4"}},{"id":1249261,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Employee Option (right to buy)","published_at":"2025-02-24T19:14:44.000Z","date":"2025-02-21","kind":"grant","planned":false,"acquired":true,"shares":2772,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The stock options are excercisable in three installments of 33%, 33% and 34% on February 21, 2026, 2027 and 2028, respectively."}],"balance_after":2772,"derivative":{"exercise_price":110.15,"expiration_date":"2035-02-21","underlying":"Common Stock","underlying_shares":2772},"source":{"system":"sec-edgar","filing":"0000950170-25-025490","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017025025490/ownership.xml","form_type":"4"}},{"id":1249260,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-02-24T19:14:44.000Z","date":"2025-02-20","kind":"grant","planned":false,"acquired":true,"shares":955,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of common stock that vested on February 20, 2025, upon the determination by the Compensation Committee of the Issuer's Board of Directors of the satisfaction of performance criteria underlying an award of performance stock units (\"PSUs\") granted to the Reporting Person on February 18, 2022, under the terms of the Issuer's 2013 Omnibus Incentive Plan."}],"balance_after":7664,"source":{"system":"sec-edgar","filing":"0000950170-25-025490","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017025025490/ownership.xml","form_type":"4"}},{"id":1255363,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-02-20T19:41:30.000Z","date":"2025-02-18","kind":"exercise","planned":false,"acquired":false,"shares":513,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted stock units (\"RSUs\") convert into the Issuer's common stock on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On February 18, 2022, the reporting person was granted 513 RSUs vesting on the third anniversay of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"On February 18, 2022, the reporting person was granted 513 RSUs vesting on the third anniversay of the grant date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":513},"source":{"system":"sec-edgar","filing":"0000950170-25-024037","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017025024037/ownership.xml","form_type":"4"}},{"id":1255362,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-02-20T19:41:30.000Z","date":"2025-02-18","kind":"exercise","planned":false,"acquired":true,"shares":513,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock units (\"RSUs\") convert into the Issuer's common stock on a one-for-one basis."}],"balance_after":6709,"source":{"system":"sec-edgar","filing":"0000950170-25-024037","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017025024037/ownership.xml","form_type":"4"}},{"id":1633223,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-02-20T14:11:27.000Z","date":"2024-02-16","kind":"grant","planned":false,"acquired":true,"shares":503,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"All of the restricted stock units will vest on February 16, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"All of the restricted stock units will vest on February 16, 2027."}],"balance_after":503,"derivative":{"underlying":"Common Stock","underlying_shares":503},"source":{"system":"sec-edgar","filing":"0000950170-24-016836","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017024016836/ownership.xml","form_type":"4"}},{"id":1633222,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Employee Option (right to buy)","published_at":"2024-02-20T14:11:27.000Z","date":"2024-02-16","kind":"grant","planned":false,"acquired":true,"shares":1394,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The stock options are excercisable in three installments of 33%, 33% and 34% on February 16, 2025, 2026 and 2027, respectively."}],"balance_after":1394,"derivative":{"exercise_price":144.485,"expiration_date":"2034-02-16","underlying":"Common Stock","underlying_shares":1394},"source":{"system":"sec-edgar","filing":"0000950170-24-016836","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000095017024016836/ownership.xml","form_type":"4"}},{"id":2003176,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"VP & MD, Westlake Innovations"}}],"security":"Restricted Stock Units","published_at":"2023-02-21T14:08:43.000Z","date":"2023-02-17","kind":"grant","acquired":true,"shares":570,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"All of the restricted stock units will vest on February 17, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"All of the restricted stock units will vest on February 17, 2026."}],"balance_after":570,"derivative":{"underlying":"Common Stock","underlying_shares":570},"source":{"system":"sec-edgar","filing":"0001567619-23-003371","document":"doc1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761923003371/doc1.xml","form_type":"4"}},{"id":2003175,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"VP & MD, Westlake Innovations"}}],"security":"Employee Option (right to buy)","published_at":"2023-02-21T14:08:43.000Z","date":"2023-02-17","kind":"grant","acquired":true,"shares":1557,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The stock options are excercisable in three installments of 33%, 33% and 34% on February 17, 2024, 2025 and 2026, respectively."}],"balance_after":1557,"derivative":{"exercise_price":122.65,"expiration_date":"2033-02-17","underlying":"Common Stock","underlying_shares":1557},"source":{"system":"sec-edgar","filing":"0001567619-23-003371","document":"doc1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761923003371/doc1.xml","form_type":"4"}},{"id":2322952,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"see remarks"}}],"security":"Restricted Stock Units","published_at":"2022-03-21T14:00:54.000Z","date":"2022-02-18","kind":"grant","acquired":true,"shares":513,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"All of the restricted stock units will vest on February 18, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"All of the restricted stock units will vest on February 18, 2025."}],"balance_after":513,"derivative":{"underlying":"Common Stock","underlying_shares":513},"source":{"system":"sec-edgar","filing":"0001567619-22-007275","document":"doc1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761922007275/doc1.xml","form_type":"4"}},{"id":2322951,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"see remarks"}}],"security":"Employee Option (right to buy)","published_at":"2022-03-21T14:00:54.000Z","date":"2022-02-18","kind":"grant","acquired":true,"shares":1623,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The stock options are excercisable in three installments of 33%, 33% and 34% on February 18, 2023, 2024 and 2025, respectively."}],"balance_after":1623,"derivative":{"exercise_price":108.1175,"expiration_date":"2032-02-18","underlying":"Common Stock","underlying_shares":1623},"source":{"system":"sec-edgar","filing":"0001567619-22-007275","document":"doc1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761922007275/doc1.xml","form_type":"4"}},{"id":2602086,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Restricted Stock Units","published_at":"2021-08-16T17:56:13.000Z","date":"2021-08-14","kind":"exercise","acquired":false,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted stock units convert into the Issuer's common stock on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On August 14, 2020 the reporting person was granted 2,400 restricted stock units vesting on the first anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"On August 14, 2020 the reporting person was granted 2,400 restricted stock units vesting on the first anniversary of the grant date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2400},"source":{"system":"sec-edgar","filing":"0001567619-21-015715","document":"doc1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761921015715/doc1.xml","form_type":"4"}},{"id":2602085,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-08-16T17:56:13.000Z","date":"2021-08-14","kind":"exercise","acquired":true,"shares":2400,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock units convert into the Issuer's common stock on a one-for-one basis."}],"balance_after":6196,"source":{"system":"sec-edgar","filing":"0001567619-21-015715","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761921015715/doc1.xml","form_type":"4"}},{"id":3055644,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Restricted Stock Units","published_at":"2020-08-17T16:21:08.000Z","date":"2020-08-16","kind":"exercise","acquired":false,"shares":2387,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted stock units convert into the Issuer's common stock on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On August 16, 2019 the reporting person was granted 2,387 restricted stock units vesting on the first anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On August 16, 2019 the reporting person was granted 2,387 restricted stock units vesting on the first anniversary of the grant date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2387},"source":{"system":"sec-edgar","filing":"0001567619-20-015593","document":"doc1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761920015593/doc1.xml","form_type":"4"}},{"id":3055643,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Restricted Stock Units","published_at":"2020-08-17T16:21:08.000Z","date":"2020-08-14","kind":"grant","acquired":true,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted stock units convert into the Issuer's common stock on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"All of the restricted stock units will vest on August 14, 2021."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"All of the restricted stock units will vest on August 14, 2021."}],"balance_after":2400,"derivative":{"underlying":"Common Stock","underlying_shares":2400},"source":{"system":"sec-edgar","filing":"0001567619-20-015593","document":"doc1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761920015593/doc1.xml","form_type":"4"}},{"id":3055642,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-08-17T16:21:08.000Z","date":"2020-08-16","kind":"exercise","acquired":true,"shares":2387,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock units convert into the Issuer's common stock on a one-for-one basis."}],"balance_after":3796,"source":{"system":"sec-edgar","filing":"0001567619-20-015593","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761920015593/doc1.xml","form_type":"4"}},{"id":3434250,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Restricted Stock Units","published_at":"2019-08-19T13:41:09.000Z","date":"2019-08-17","kind":"exercise","acquired":true,"shares":1409,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted stock units convert into the Issuer's common stock on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On August 17, 2018 the reporting person was granted 1,409 restricted stock vesting on the first anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On August 17, 2018 the reporting person was granted 1,409 restricted stock vesting on the first anniversary of the grant date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1409},"source":{"system":"sec-edgar","filing":"0001567619-19-017224","document":"doc1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761919017224/doc1.xml","form_type":"4"}},{"id":3434249,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Restricted Stock Units","published_at":"2019-08-19T13:41:09.000Z","date":"2019-08-16","kind":"grant","acquired":true,"shares":2387,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted stock units convert into the Issuer's common stock on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"All of the restricted stock units will vest on August 16, 2020."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"All of the restricted stock units will vest on August 16, 2020."}],"balance_after":2387,"derivative":{"underlying":"Common Stock","underlying_shares":2387},"source":{"system":"sec-edgar","filing":"0001567619-19-017224","document":"doc1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761919017224/doc1.xml","form_type":"4"}},{"id":3434248,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2019-08-19T13:41:09.000Z","date":"2019-08-17","kind":"exercise","acquired":true,"shares":1409,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock units convert into the Issuer's common stock on a one-for-one basis."}],"balance_after":1409,"source":{"system":"sec-edgar","filing":"0001567619-19-017224","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761919017224/doc1.xml","form_type":"4"}},{"id":3838070,"issuer":{"id":3555,"kind":"organization","name":"WESTLAKE CORP"},"owners":[{"id":65146,"kind":"person","name":"Chao John Tsung-chen","position":1,"cik":"0001746472","reported_name":"Chao John Tsung-chen","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Restricted Stock Units","published_at":"2018-08-20T14:35:18.000Z","date":"2018-08-17","kind":"grant","acquired":true,"shares":1409,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"All of the restricted stock units will vest on August 17, 2019."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"All of the restricted stock units will vest on August 17, 2019."}],"balance_after":1409,"derivative":{"underlying":"Common Stock","underlying_shares":1409},"source":{"system":"sec-edgar","filing":"0001567619-18-001429","document":"doc1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1262823/000156761918001429/doc1.xml","form_type":"4"}}]}