{"entity":{"type":"insider","cik":"0001330417","url":"/insider/0001330417","json_url":"/insider/0001330417.json","name":"Bender Mark Steven","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":103,"n_filings":42,"first":"2010-08-10","last":"2026-03-30","span_basis":"filed_date"},"name_variants":[{"name":"Bender Mark Steven","source":"filing","n_filings":42,"first_seen":"2010-08-10","last_seen":"2026-03-30"}],"transactions":[{"id":6016948,"accession":"0001193125-26-131706","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001193125-26-131706","line_url":"/filing/0001193125-26-131706#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP & CFO)","role_mark":"O","role_mark_label":"Officer (EVP & CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP & CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":16413.0,"shares_display":"16,413","price_per_share":112.535,"price_display":"112.54","price_state":"stated","total_value":1847036.955,"total_display":"1,847,036.96","total_whole":"1,847,037","shares_owned_after":28015.0,"shares_owned_after_display":"28,015","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-03-27","filed_date":"2026-03-30","scope":"insider"},{"id":5847201,"accession":"0001193125-26-084672","txn_seq":5,"anchor":"line-5","filing_url":"/filing/0001193125-26-084672","line_url":"/filing/0001193125-26-084672","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP & CFO)","role_mark":"O","role_mark_label":"Officer (EVP & CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP & CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":17409.0,"shares_display":"17,409","price_per_share":100.9246306508128,"price_display":"100.92","price_state":"stated","total_value":1756996.895,"total_display":"1,756,996.90","total_whole":"1,756,997","shares_owned_after":44854.0,"shares_owned_after_display":"44,854","ownership_form":"D","is_10b5_1":null,"transaction_date":"2026-02-27","filed_date":"2026-03-02","scope":"insider","n_lines":2},{"id":2514912,"accession":"0000950170-24-053244","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0000950170-24-053244","line_url":"/filing/0000950170-24-053244#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP & CFO)","role_mark":"O","role_mark_label":"Officer (EVP & CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP & CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4950.0,"shares_display":"4,950","price_per_share":152.19,"price_display":"152.19","price_state":"stated","total_value":753340.5,"total_display":"753,340.50","total_whole":"753,341","shares_owned_after":40356.0,"shares_owned_after_display":"40,356","ownership_form":"D","is_10b5_1":null,"transaction_date":"2024-05-03","filed_date":"2024-05-06","scope":"insider"},{"id":2037021,"accession":"0000950170-24-027605","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0000950170-24-027605","line_url":"/filing/0000950170-24-027605#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP & CFO)","role_mark":"O","role_mark_label":"Officer (EVP & CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP & CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4804.0,"shares_display":"4,804","price_per_share":141.019,"price_display":"141.02","price_state":"stated","total_value":677455.276,"total_display":"677,455.28","total_whole":"677,455","shares_owned_after":45306.0,"shares_owned_after_display":"45,306","ownership_form":"D","is_10b5_1":null,"transaction_date":"2024-03-06","filed_date":"2024-03-07","scope":"insider"},{"id":2203684,"accession":"0000950170-24-021783","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0000950170-24-021783","line_url":"/filing/0000950170-24-021783#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP & CFO)","role_mark":"O","role_mark_label":"Officer (EVP & CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP & CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4854.0,"shares_display":"4,854","price_per_share":137.57,"price_display":"137.57","price_state":"stated","total_value":667764.78,"total_display":"667,764.78","total_whole":"667,765","shares_owned_after":50110.0,"shares_owned_after_display":"50,110","ownership_form":"D","is_10b5_1":null,"transaction_date":"2024-02-26","filed_date":"2024-02-28","scope":"insider"},{"id":6704633,"accession":"0001567619-22-007819","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001567619-22-007819","line_url":"/filing/0001567619-22-007819","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6021.0,"shares_display":"6,021","price_per_share":124.35374572330177,"price_display":"124.35","price_state":"stated","total_value":748733.903,"total_display":"748,733.90","total_whole":"748,734","shares_owned_after":30825.0,"shares_owned_after_display":"30,825","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-03-31","filed_date":"2022-04-01","scope":"insider","n_lines":2},{"id":6579106,"accession":"0001567619-22-007737","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001567619-22-007737","line_url":"/filing/0001567619-22-007737","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6000.0,"shares_display":"6,000","price_per_share":124.80171033333333,"price_display":"124.80","price_state":"stated","total_value":748810.262,"total_display":"748,810.26","total_whole":"748,810","shares_owned_after":30725.0,"shares_owned_after_display":"30,725","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-03-30","filed_date":"2022-03-31","scope":"insider","n_lines":2},{"id":6332334,"accession":"0001567619-22-007689","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001567619-22-007689","line_url":"/filing/0001567619-22-007689#line-3","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4000.0,"shares_display":"4,000","price_per_share":122.437,"price_display":"122.44","price_state":"stated","total_value":489748.0,"total_display":"489,748.00","total_whole":"489,748","shares_owned_after":30725.0,"shares_owned_after_display":"30,725","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-03-29","filed_date":"2022-03-30","scope":"insider"},{"id":6516059,"accession":"0001567619-22-007575","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001567619-22-007575","line_url":"/filing/0001567619-22-007575","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8000.0,"shares_display":"8,000","price_per_share":125.34054975,"price_display":"125.34","price_state":"stated","total_value":1002724.398,"total_display":"1,002,724.40","total_whole":"1,002,724","shares_owned_after":33672.0,"shares_owned_after_display":"33,672","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-03-25","filed_date":"2022-03-28","scope":"insider","n_lines":2},{"id":6979162,"accession":"0001567619-22-007463","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001567619-22-007463","line_url":"/filing/0001567619-22-007463#line-3","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":8000.0,"shares_display":"8,000","price_per_share":125.3837,"price_display":"125.38","price_state":"stated","total_value":1003069.6,"total_display":"1,003,069.60","total_whole":"1,003,070","shares_owned_after":30725.0,"shares_owned_after_display":"30,725","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-03-24","filed_date":"2022-03-25","scope":"insider"},{"id":6938239,"accession":"0001567619-22-007422","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001567619-22-007422","line_url":"/filing/0001567619-22-007422","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6000.0,"shares_display":"6,000","price_per_share":125.168476,"price_display":"125.17","price_state":"stated","total_value":751010.856,"total_display":"751,010.86","total_whole":"751,011","shares_owned_after":31069.0,"shares_owned_after_display":"31,069","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-03-23","filed_date":"2022-03-24","scope":"insider","n_lines":2},{"id":5525079,"accession":"0001567619-21-020169","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-21-020169","line_url":"/filing/0001567619-21-020169#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Director, Officer (EVP and CFO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2369.0,"shares_display":"2,369","price_per_share":101.57,"price_display":"101.57","price_state":"stated","total_value":240619.33,"total_display":"240,619.33","total_whole":"240,619","shares_owned_after":22024.0,"shares_owned_after_display":"22,024","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-11-11","filed_date":"2021-11-15","scope":"insider"},{"id":4390619,"accession":"0001567619-21-019659","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-21-019659","line_url":"/filing/0001567619-21-019659#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Director, Officer (EVP and CFO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":631.0,"shares_display":"631","price_per_share":100.772,"price_display":"100.77","price_state":"stated","total_value":63587.132,"total_display":"63,587.13","total_whole":"63,587","shares_owned_after":24393.0,"shares_owned_after_display":"24,393","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-11-08","filed_date":"2021-11-10","scope":"insider"},{"id":4147777,"accession":"0001567619-21-019456","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-21-019456","line_url":"/filing/0001567619-21-019456#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Director, Officer (EVP and CFO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6356.0,"shares_display":"6,356","price_per_share":98.796,"price_display":"98.80","price_state":"stated","total_value":627947.376,"total_display":"627,947.38","total_whole":"627,947","shares_owned_after":25024.0,"shares_owned_after_display":"25,024","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-11-05","filed_date":"2021-11-08","scope":"insider"},{"id":4942768,"accession":"0001567619-21-006247","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001567619-21-006247","line_url":"/filing/0001567619-21-006247","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":15740.0,"shares_display":"15,740","price_per_share":94.70059720457434,"price_display":"94.70","price_state":"stated","total_value":1490587.4,"total_display":"1,490,587.40","total_whole":"1,490,587","shares_owned_after":37200.0,"shares_owned_after_display":"37,200","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-03-12","filed_date":"2021-03-15","scope":"insider","n_lines":2},{"id":4266430,"accession":"0001567619-21-005948","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001567619-21-005948","line_url":"/filing/0001567619-21-005948#line-3","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":25811.0,"shares_display":"25,811","price_per_share":92.2719,"price_display":"92.27","price_state":"stated","total_value":2381630.0109,"total_display":"2,381,630.01","total_whole":"2,381,630","shares_owned_after":31380.0,"shares_owned_after_display":"31,380","ownership_form":"D","is_10b5_1":null,"transaction_date":"2021-03-09","filed_date":"2021-03-10","scope":"insider"},{"id":2116108,"accession":"0001567619-20-018999","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-20-018999","line_url":"/filing/0001567619-20-018999#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Director, Officer (EVP and CFO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1600.0,"shares_display":"1,600","price_per_share":74.7944,"price_display":"74.79","price_state":"stated","total_value":119671.04,"total_display":"119,671.04","total_whole":"119,671","shares_owned_after":27882.0,"shares_owned_after_display":"27,882","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-11-06","filed_date":"2020-11-10","scope":"insider"},{"id":2271660,"accession":"0001567619-20-018814","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001567619-20-018814","line_url":"/filing/0001567619-20-018814","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":24996.0,"shares_display":"24,996","price_per_share":73.98940950552088,"price_display":"73.99","price_state":"stated","total_value":1849439.28,"total_display":"1,849,439.28","total_whole":"1,849,439","shares_owned_after":29902.0,"shares_owned_after_display":"29,902","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-11-05","filed_date":"2020-11-06","scope":"insider","n_lines":2},{"id":2164132,"accession":"0001567619-20-006351","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001567619-20-006351","line_url":"/filing/0001567619-20-006351#line-2","is_derivative":false,"issuer_cik":"0001330417","issuer_name":"Westlake Chemical Partners LP","issuer_ticker":"WLKP","issuer_name_source":null,"issuer_url":"/issuer/0001330417","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Director, Officer (SVP, CFO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, CFO","security_title":"Common Units (Limited Partner Interests)","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":1000.0,"shares_display":"1,000","price_per_share":14.914,"price_display":"14.91","price_state":"stated","total_value":14914.0,"total_display":"14,914.00","total_whole":"14,914","shares_owned_after":14000.0,"shares_owned_after_display":"14,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-03-13","filed_date":"2020-03-16","scope":"insider"},{"id":2164128,"accession":"0001567619-20-006351","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001567619-20-006351","line_url":"/filing/0001567619-20-006351#line-1","is_derivative":false,"issuer_cik":"0001330417","issuer_name":"Westlake Chemical Partners LP","issuer_ticker":"WLKP","issuer_name_source":null,"issuer_url":"/issuer/0001330417","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Director, Officer (SVP, CFO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, CFO","security_title":"Common Units (Limited Partner Interests)","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":1000.0,"shares_display":"1,000","price_per_share":15.073,"price_display":"15.07","price_state":"stated","total_value":15073.0,"total_display":"15,073.00","total_whole":"15,073","shares_owned_after":13000.0,"shares_owned_after_display":"13,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2020-03-12","filed_date":"2020-03-16","scope":"insider"},{"id":6134889,"accession":"0001140361-18-025119","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001140361-18-025119","line_url":"/filing/0001140361-18-025119","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":12066.0,"shares_display":"12,066","price_per_share":122.83459224266534,"price_display":"122.83","price_state":"stated","total_value":1482122.19,"total_display":"1,482,122.19","total_whole":"1,482,122","shares_owned_after":16071.0,"shares_owned_after_display":"16,071","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-05-21","filed_date":"2018-05-22","scope":"insider","n_lines":3},{"id":6874720,"accession":"0001140361-18-023144","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001140361-18-023144","line_url":"/filing/0001140361-18-023144#line-3","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":23506.0,"shares_display":"23,506","price_per_share":117.33,"price_display":"117.33","price_state":"stated","total_value":2757958.98,"total_display":"2,757,958.98","total_whole":"2,757,959","shares_owned_after":15810.0,"shares_owned_after_display":"15,810","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-05-11","filed_date":"2018-05-14","scope":"insider"},{"id":6155329,"accession":"0001140361-18-010379","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-18-010379","line_url":"/filing/0001140361-18-010379#line-1","is_derivative":false,"issuer_cik":"0001330417","issuer_name":"Westlake Chemical Partners LP","issuer_ticker":"WLKP","issuer_name_source":null,"issuer_url":"/issuer/0001330417","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Director, Officer (SVP, CFO and Treasurer)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"SVP, CFO and Treasurer","security_title":"Common Units (Limited Partner Interests)","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":2000.0,"shares_display":"2,000","price_per_share":23.7675,"price_display":"23.77","price_state":"stated","total_value":47535.0,"total_display":"47,535.00","total_whole":"47,535","shares_owned_after":12000.0,"shares_owned_after_display":"12,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-02-27","filed_date":"2018-02-27","scope":"insider"},{"id":6786680,"accession":"0001140361-18-010336","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-18-010336","line_url":"/filing/0001140361-18-010336","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":5000.0,"shares_display":"5,000","price_per_share":111.694,"price_display":"111.69","price_state":"stated","total_value":558470.0,"total_display":"558,470.00","total_whole":"558,470","shares_owned_after":15810.0,"shares_owned_after_display":"15,810","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-02-26","filed_date":"2018-02-27","scope":"insider","n_lines":2},{"id":6528235,"accession":"0001140361-18-009760","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-18-009760","line_url":"/filing/0001140361-18-009760#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4000.0,"shares_display":"4,000","price_per_share":110.97,"price_display":"110.97","price_state":"stated","total_value":443880.0,"total_display":"443,880.00","total_whole":"443,880","shares_owned_after":22810.0,"shares_owned_after_display":"22,810","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-02-22","filed_date":"2018-02-23","scope":"insider"},{"id":6501288,"accession":"0001140361-18-010042","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-18-010042","line_url":"/filing/0001140361-18-010042#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2000.0,"shares_display":"2,000","price_per_share":110.635,"price_display":"110.64","price_state":"stated","total_value":221270.0,"total_display":"221,270.00","total_whole":"221,270","shares_owned_after":20810.0,"shares_owned_after_display":"20,810","ownership_form":"D","is_10b5_1":null,"transaction_date":"2018-02-22","filed_date":"2018-02-26","scope":"insider"},{"id":5247138,"accession":"0001140361-17-045021","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-17-045021","line_url":"/filing/0001140361-17-045021#line-2","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":6500.0,"shares_display":"6,500","price_per_share":97.831,"price_display":"97.83","price_state":"stated","total_value":635901.5,"total_display":"635,901.50","total_whole":"635,902","shares_owned_after":24067.0,"shares_owned_after_display":"24,067","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-12-04","filed_date":"2017-12-05","scope":"insider"},{"id":5022184,"accession":"0001140361-17-043632","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-17-043632","line_url":"/filing/0001140361-17-043632#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":20382.0,"shares_display":"20,382","price_per_share":94.265,"price_display":"94.26","price_state":"stated","total_value":1921309.23,"total_display":"1,921,309.23","total_whole":"1,921,309","shares_owned_after":24067.0,"shares_owned_after_display":"24,067","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-11-21","filed_date":"2017-11-22","scope":"insider"},{"id":5180248,"accession":"0001140361-17-042931","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001140361-17-042931","line_url":"/filing/0001140361-17-042931","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (EVP and CFO)","role_mark":"O","role_mark_label":"Officer (EVP and CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"EVP and CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":29804.0,"shares_display":"29,804","price_per_share":94.01697825795195,"price_display":"94.02","price_state":"stated","total_value":2802082.02,"total_display":"2,802,082.02","total_whole":"2,802,082","shares_owned_after":45049.0,"shares_owned_after_display":"45,049","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-11-13","filed_date":"2017-11-15","scope":"insider","n_lines":2},{"id":4788364,"accession":"0001140361-17-032454","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-17-032454","line_url":"/filing/0001140361-17-032454#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (Executive VP & CFO)","role_mark":"O","role_mark_label":"Officer (Executive VP & CFO)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Executive VP & CFO","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":13794.0,"shares_display":"13,794","price_per_share":70.2204,"price_display":"70.22","price_state":"stated","total_value":968620.1976,"total_display":"968,620.20","total_whole":"968,620","shares_owned_after":44449.0,"shares_owned_after_display":"44,449","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-08-15","filed_date":"2017-08-16","scope":"insider"},{"id":4117795,"accession":"0001140361-17-011748","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-17-011748","line_url":"/filing/0001140361-17-011748#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (Sr VP, CFO and Treasurer)","role_mark":"O","role_mark_label":"Officer (Sr VP, CFO and Treasurer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Sr VP, CFO and Treasurer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":12000.0,"shares_display":"12,000","price_per_share":64.3154,"price_display":"64.32","price_state":"stated","total_value":771784.8,"total_display":"771,784.80","total_whole":"771,785","shares_owned_after":58243.0,"shares_owned_after_display":"58,243","ownership_form":"D","is_10b5_1":null,"transaction_date":"2017-03-10","filed_date":"2017-03-13","scope":"insider"},{"id":6669163,"accession":"0001140361-14-031040","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-14-031040","line_url":"/filing/0001140361-14-031040#line-1","is_derivative":false,"issuer_cik":"0001330417","issuer_name":"Westlake Chemical Partners LP","issuer_ticker":"WLKP","issuer_name_source":null,"issuer_url":"/issuer/0001330417","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Director, Officer (Sr VP, CFO)","role_mark":"D","role_mark_label":"Director","role_mark_generic":"Director","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Sr VP, CFO","security_title":"Common Units (Limited Partner Interests)","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":10000.0,"shares_display":"10,000","price_per_share":24.0,"price_display":"24.00","price_state":"stated","total_value":240000.0,"total_display":"240,000.00","total_whole":"240,000","shares_owned_after":10000.0,"shares_owned_after_display":"10,000","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-08-04","filed_date":"2014-08-06","scope":"insider"},{"id":6604073,"accession":"0001140361-14-010847","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001140361-14-010847","line_url":"/filing/0001140361-14-010847#line-3","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (Sr VP, CFO and Treasurer)","role_mark":"O","role_mark_label":"Officer (Sr VP, CFO and Treasurer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Sr VP, CFO and Treasurer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":17721.0,"shares_display":"17,721","price_per_share":133.6,"price_display":"133.60","price_state":"stated","total_value":2367525.6,"total_display":"2,367,525.60","total_whole":"2,367,526","shares_owned_after":21495.0,"shares_owned_after_display":"21,495","ownership_form":"D","is_10b5_1":null,"transaction_date":"2014-03-03","filed_date":"2014-03-04","scope":"insider"},{"id":4236919,"accession":"0001140361-13-032906","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-13-032906","line_url":"/filing/0001140361-13-032906#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (Sr VP, CFO and Treasurer)","role_mark":"O","role_mark_label":"Officer (Sr VP, CFO and Treasurer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Sr VP, CFO and Treasurer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":2930.0,"shares_display":"2,930","price_per_share":101.0,"price_display":"101.00","price_state":"stated","total_value":295930.0,"total_display":"295,930.00","total_whole":"295,930","shares_owned_after":22685.0,"shares_owned_after_display":"22,685","ownership_form":"D","is_10b5_1":null,"transaction_date":"2013-08-12","filed_date":"2013-08-14","scope":"insider"},{"id":4510320,"accession":"0001140361-13-031718","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001140361-13-031718","line_url":"/filing/0001140361-13-031718#line-1","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (Sr VP, CFO and Treasurer)","role_mark":"O","role_mark_label":"Officer (Sr VP, CFO and Treasurer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Sr VP, CFO and Treasurer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3000.0,"shares_display":"3,000","price_per_share":101.0001,"price_display":"101.00","price_state":"stated","total_value":303000.3,"total_display":"303,000.30","total_whole":"303,000","shares_owned_after":25615.0,"shares_owned_after_display":"25,615","ownership_form":"D","is_10b5_1":null,"transaction_date":"2013-08-08","filed_date":"2013-08-12","scope":"insider"},{"id":5564032,"accession":"0001140361-13-014071","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001140361-13-014071","line_url":"/filing/0001140361-13-014071#line-4","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (Sr VP, CFO and Treasurer)","role_mark":"O","role_mark_label":"Officer (Sr VP, CFO and Treasurer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Sr VP, CFO and Treasurer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":4429.0,"shares_display":"4,429","price_per_share":95.0,"price_display":"95.00","price_state":"stated","total_value":420755.0,"total_display":"420,755.00","total_whole":"420,755","shares_owned_after":28615.0,"shares_owned_after_display":"28,615","ownership_form":"D","is_10b5_1":null,"transaction_date":"2013-03-25","filed_date":"2013-03-26","scope":"insider"},{"id":2119993,"accession":"0001140361-12-049798","txn_seq":4,"anchor":"line-4","filing_url":"/filing/0001140361-12-049798","line_url":"/filing/0001140361-12-049798#line-4","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (Sr VP, CFO and Treasurer)","role_mark":"O","role_mark_label":"Officer (Sr VP, CFO and Treasurer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Sr VP, CFO and Treasurer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":3042.0,"shares_display":"3,042","price_per_share":73.0,"price_display":"73.00","price_state":"stated","total_value":222066.0,"total_display":"222,066.00","total_whole":"222,066","shares_owned_after":33239.0,"shares_owned_after_display":"33,239","ownership_form":"D","is_10b5_1":null,"transaction_date":"2012-12-03","filed_date":"2012-12-05","scope":"insider"},{"id":2119990,"accession":"0001140361-12-049798","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001140361-12-049798","line_url":"/filing/0001140361-12-049798#line-3","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (Sr VP, CFO and Treasurer)","role_mark":"O","role_mark_label":"Officer (Sr VP, CFO and Treasurer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Sr VP, CFO and Treasurer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":1967.0,"shares_display":"1,967","price_per_share":73.5,"price_display":"73.50","price_state":"stated","total_value":144574.5,"total_display":"144,574.50","total_whole":"144,575","shares_owned_after":30956.0,"shares_owned_after_display":"30,956","ownership_form":"D","is_10b5_1":null,"transaction_date":"2012-12-03","filed_date":"2012-12-05","scope":"insider"},{"id":2119987,"accession":"0001140361-12-049798","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001140361-12-049798","line_url":"/filing/0001140361-12-049798#line-2","is_derivative":false,"issuer_cik":"0001262823","issuer_name":"WESTLAKE CHEMICAL CORP","issuer_ticker":"WLK","issuer_name_source":null,"issuer_url":"/issuer/0001262823","owner_cik":"0001330417","owner_name":"Bender Mark Steven","owner_display_name":"Bender Mark Steven","owner_url":"/insider/0001330417","role":"Officer (Sr VP, CFO and Treasurer)","role_mark":"O","role_mark_label":"Officer (Sr VP, CFO and Treasurer)","role_mark_generic":"Officer","n_reporting_owners":null,"other_reporting_owners":null,"officer_title":"Sr VP, CFO and Treasurer","security_title":"Common Stock","transaction_code":"S","transaction_label":"Open-market sale","open_market":true,"acquired_disposed":"D","direction_word":"disposed","shares":758.0,"shares_display":"758","price_per_share":73.5,"price_display":"73.50","price_state":"stated","total_value":55713.0,"total_display":"55,713.00","total_whole":"55,713","shares_owned_after":30198.0,"shares_owned_after_display":"30,198","ownership_form":"D","is_10b5_1":null,"transaction_date":"2012-12-03","filed_date":"2012-12-05","scope":"insider"}],"collapsed":true,"next_cursor":"2012-12-03|2119987","ledger_fault":false,"count":{"value":103,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":4,"open_market":true},{"code":"S","label":"Open-market sale","n":99,"open_market":true},{"code":"M","label":"Option exercise","n":0,"open_market":false},{"code":"A","label":"Grant or award","n":0,"open_market":false},{"code":"F","label":"Tax withholding","n":0,"open_market":false},{"code":"D","label":"Disposition to the issuer","n":0,"open_market":false},{"code":"X","label":"In-the-money option exercise","n":0,"open_market":false}],"total":103},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0001262823","name":"WESTLAKE CORP","url":"/issuer/0001262823","role":"Director, Officer (EVP & CFO)","n_filings":39,"first_seen":"2010-08-10","last_seen":"2026-03-30"},{"type":"issuer","type_label":"ISSUER","cik":"0001604665","name":"Westlake Chemical Partners LP","url":"/issuer/0001604665","role":"Director, Officer (SVP, CFO)","n_filings":3,"first_seen":"2014-08-06","last_seen":"2020-03-16"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001330417","retrieved_at":"2026-08-23T14:46:24+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-21","last_ingest":"2026-08-22T05:23:40.159918+00:00","counts_are":{"filings":"estimate","transactions":"estimate","issuers":"estimate","insiders":"estimate"},"source":"SEC EDGAR Form 4 filings, parsed by ebomi","fault":false},"license":{"underlying_records":"US SEC filings are public records of the United States government and are not subject to copyright. The transactional facts in them are not ours to license.","this_presentation":"The parsing, normalisation, curation, and presentation are ebomi's own work.","grant":"undecided","grant_note":"The open licence for ebomi's own layer is an open owner decision (SPEC-20260731T1159Z open question 3: CC BY 4.0 or CC0 with a citation request). Until it is taken, no grant is asserted here.","citation_request":"Balogh, A. Insider trading. Scientific Data 10, 237 (2023)","url":"https://ebomi.com/license"},"fair_use":{"policy":"These JSON endpoints are open and unauthenticated. Please read them at a human pace, identify your client in the User-Agent header, and use the published dataset for bulk work rather than crawling page by page.","bulk_alternative":"doi:10.1038/s41597-023-02147-6"}}