NYSE:WLK | Insider Transactions | WESTLAKE CORP

WLK Insider Transactions

856 retained open-market purchase and sale rows from SEC Forms 3, 4 and 5, newest first. This page shows rows 1–100; provenance stays internal.

WLK insiders transaction timeline

PurchaseSale
2004-08-16: 4 purchases — Wallace Stephen, Chao James, Chao Albert2005-01-09: 1 sale — Morse Wayne D2006-01-12: 1 sale — Morse Wayne D2006-05-02: 2 sales — TTWFGP LLC, TTWF LP2006-08-22: 3 sales — Hansen David R, Taylor Jeffrey L, Morse Wayne D2006-08-23: 1 sale — Mangieri George J2006-08-30: 6 sales — Wallace Stephen, Mangieri George J, Hansen David R2006-08-31: 1 sale — Hansen David R2006-11-07: 3 sales — Wilder Warren W, Mangieri George J, Wallace Stephen2006-11-15: 1 sale — Hansen David R2006-11-16: 2 sales — Taylor Jeffrey L2007-08-17: 4 sales — Wallace Stephen2008-09-25: 5 sales — Morse Wayne D2009-08-06: 5 sales — Taylor Jeffrey L, Morse Wayne D, Mangieri George J2009-08-07: 6 sales — Hansen David R2009-11-09: 3 sales — Taylor Jeffrey L2010-03-02: 2 sales — Morse Wayne D2010-03-03: 9 sales — Taylor Jeffrey L2010-03-11: 1 sale — Morse Wayne D2010-05-09: 1 sale — Mangieri George J2010-08-09: 1 sale — Bender Mark Steven2010-08-16: 21 sales — Kenner Andrew, Taylor Jeffrey L, Hansen David R2010-11-05: 32 sales — Mangieri George J, Condon Donald Marion Jr, Hansen David R2010-11-18: 1 sale — Chao James2011-02-24: 1 sale — Condon Donald Marion Jr2011-02-25: 54 sales — Bender Mark Steven, Taylor Jeffrey L2011-02-28: 22 sales — Mangieri George J, Hansen David R2011-03-02: 3 sales — Hansen David R, BLAKELY ROBERT T2011-03-03: 4 sales — Taylor Jeffrey L, LUKENS MAX L2011-03-07: 3 sales — Mangieri George J2011-03-08: 4 sales — Mangieri George J2011-03-09: 1 sale — Wallace Stephen2011-03-14: 3 sales — Taylor Jeffrey L2011-03-15: 2 sales — Kenner Andrew, Chao James2011-05-06: 2 sales — Mangieri George J2011-05-10: 6 sales — LUKENS MAX L2011-05-19: 4 sales — Buesinger Robert F.2011-08-08: 1 purchase — Taylor Jeffrey L2011-11-16: 3 sales — Chao James2012-05-10: 1 sale — LUKENS MAX L2012-05-14: 17 sales — Taylor Jeffrey L, BLAKELY ROBERT T2012-05-25: 23 sales — Chao James2012-05-29: 79 sales — Taylor Jeffrey L, Chao James, Condon Donald Marion Jr2012-08-06: 36 sales — Hansen David R, Mangieri George J, Buesinger Robert F.2012-08-09: 22 sales — Taylor Jeffrey L, Kenner Andrew2012-08-22: 11 sales — Chao James2012-11-23: 23 sales — Chao Albert, Bender Mark Steven2012-11-26: 31 sales — Bender Mark Steven, Chao Albert2012-11-29: 21 sales — BARNETT E WILLIAM2012-11-30: 1 sale — Condon Donald Marion Jr2012-12-03: 4 sales — Bender Mark Steven2012-12-06: 19 sales — Chao James, Chao Albert2012-12-07: 38 sales — Hansen David R, Kenner Andrew, Chao Albert and 1 more2012-12-10: 2 sales — Buesinger Robert F., Mangieri George J2013-03-11: 14 sales — LUKENS MAX L, Buesinger Robert F.2013-03-12: 5 sales — Teel Lawrence E.2013-03-13: 22 sales — Mangieri George J, Condon Donald Marion Jr, BLAKELY ROBERT T2013-03-14: 16 sales — Hansen David R, Mangieri George J2013-03-19: 1 sale — Taylor Jeffrey L2013-03-25: 1 sale — Bender Mark Steven2013-05-08: 2 sales — Buesinger Robert F., Wallace Stephen2013-05-21: 2 sales — Wallace Stephen, Mangieri George J2013-05-28: 1 sale — Kenner Andrew2013-08-01: 3 sales — Mangieri George J, LUKENS MAX L, Wallace Stephen2013-08-08: 1 sale — Bender Mark Steven2013-08-12: 1 sale — Bender Mark Steven2013-11-11: 2 sales — LUKENS MAX L2013-11-25: 1 sale — BLAKELY ROBERT T2014-02-24: 2 sales — Mangieri George J2014-02-26: 2 sales — Mangieri George J, Buesinger Robert F.2014-02-27: 1 sale — Taylor Jeffrey L2014-02-28: 3 sales — Teel Lawrence E., RILEY H JOHN JR, Hansen David R2014-03-03: 1 sale — Bender Mark Steven2014-03-13: 1 sale — BLAKELY ROBERT T2014-05-07: 1 sale — Buesinger Robert F.2014-06-09: 1 sale — Chao James2014-08-22: 1 sale — Chao James2014-08-25: 1 sale — Chao James2015-05-06: 2 sales — Kenner Andrew2015-05-11: 2 sales — Teel Lawrence E.2015-05-26: 2 sales — Taylor Jeffrey L2015-08-11: 1 sale — BLAKELY ROBERT T2015-11-10: 2 sales — Mangieri George J2016-08-23: 1 sale — Mangieri George J2016-11-10: 1 sale — Buesinger Robert F.2016-11-11: 1 sale — Mangieri George J2016-11-14: 2 sales — Chao James, Chao Albert2016-11-15: 3 sales — Mattina Michael J., Chao James, Chao Albert2016-11-16: 2 sales — Chao James, Chao Albert2016-11-17: 4 sales — Chao James, Chao Albert2017-02-23: 1 sale — Chao Albert2017-03-01: 1 sale — Buesinger Robert F.2017-03-10: 1 sale — Bender Mark Steven2017-05-17: 1 sale — Mangieri George J2017-08-15: 1 sale — Bender Mark Steven2017-11-13: 6 sales — Bender Mark Steven, Teel Lawrence E., Mangieri George J2017-11-14: 1 sale — BLAKELY ROBERT T2017-11-17: 1 sale — Buesinger Robert F.2017-11-21: 2 sales — Chao Albert, Bender Mark Steven2017-11-22: 3 sales — Chao Albert, Chao James2017-11-24: 2 sales — Chao Albert, Chao James2017-11-27: 2 sales — Chao Albert2017-11-28: 2 sales — Chao Albert2017-11-29: 1 sale — Chao Albert2017-12-01: 1 sale — Buesinger Robert F.2017-12-04: 1 sale — Bender Mark Steven2018-02-22: 5 sales — Bender Mark Steven, LUKENS MAX L, Ederington L. Benjamin2018-02-26: 3 sales — Teel Lawrence E., Bender Mark Steven2018-02-27: 1 sale — BLAKELY ROBERT T2018-02-28: 1 sale — Mangieri George J2018-03-05: 4 sales — Buesinger Robert F., Mangieri George J, Kenner Andrew2018-03-09: 1 sale — Kenner Andrew2018-05-10: 1 sale — Jenkins Dorothy C2018-05-11: 1 sale — Bender Mark Steven2018-05-15: 1 sale — Buesinger Robert F.2018-05-21: 3 sales — Bender Mark Steven2018-05-24: 1 sale — Chao James2018-11-12: 2 sales — Chao Albert2018-11-13: 3 sales — Chao Albert2018-11-14: 3 sales — Chao Albert2018-11-15: 3 sales — Chao Albert2018-11-16: 2 sales — Chao Albert2019-03-19: 1 sale — RILEY H JOHN JR2019-08-20: 1 sale — Jenkins Dorothy C2019-11-08: 1 sale — Mangieri George J2020-02-21: 1 sale — Chao Albert2020-03-13: 3 purchases — TTWFGP LLC2020-03-16: 5 purchases — TTWFGP LLC, Kearns Roger L.2020-03-17: 7 purchases — TTWFGP LLC2020-03-18: 6 purchases — TTWFGP LLC2020-03-19: 5 purchases — TTWFGP LLC2020-03-24: 5 purchases — TTWFGP LLC2020-03-25: 7 purchases — TTWFGP LLC2020-03-26: 4 purchases — TTWFGP LLC2020-03-27: 5 purchases — TTWFGP LLC2020-11-05: 2 sales — Bender Mark Steven2020-11-06: 5 sales — Chao Albert, Bender Mark Steven2020-11-23: 1 sale — Kenner Andrew2020-11-24: 1 sale — Buesinger Robert F.2021-02-25: 3 sales — Teel Lawrence E., Zoeller Johnathan Stevan2021-03-08: 2 sales — Buesinger Robert F.2021-03-09: 1 sale — Bender Mark Steven2021-03-12: 2 sales — Bender Mark Steven2021-05-10: 1 sale — Buesinger Robert F.2021-08-11: 1 purchase — Chao Albert2021-11-05: 1 sale — Bender Mark Steven2021-11-08: 1 sale — Bender Mark Steven2021-11-11: 1 sale — Bender Mark Steven2021-12-01: 6 sales — Chao Albert2021-12-02: 4 sales — Chao Albert2022-03-01: 1 sale — Zoeller Johnathan Stevan2022-03-09: 1 sale — Buesinger Robert F.2022-03-10: 1 sale — Buesinger Robert F.2022-03-23: 2 sales — Bender Mark Steven2022-03-24: 1 sale — Bender Mark Steven2022-03-25: 4 sales — Kearns Roger L., Bender Mark Steven2022-03-29: 1 sale — Bender Mark Steven2022-03-30: 2 sales — Bender Mark Steven2022-03-31: 2 sales — Bender Mark Steven2022-05-05: 2 sales — Ederington L. Benjamin2022-05-17: 1 sale — Kearns Roger L.2022-05-19: 3 sales — Chao Albert2022-05-27: 1 sale — Buesinger Robert F.2022-08-26: 1 sale — Zoeller Johnathan Stevan2022-08-31: 1 sale — Buesinger Robert F.2023-08-23: 1 sale — Chao David Tsung-Hung2023-11-15: 1 sale — Buesinger Robert F.2024-02-26: 1 sale — Bender Mark Steven2024-03-06: 1 sale — Bender Mark Steven2024-03-13: 1 sale — Buesinger Robert F.2024-03-15: 1 sale — Buesinger Robert F.2024-05-03: 1 sale — Bender Mark Steven2024-05-09: 1 sale — Buesinger Robert F.2024-11-22: 1 sale — Chao David Tsung-Hung2024-11-29: 1 sale — Chao David Tsung-Hung2025-04-22: 1 purchase — Buesinger Robert F.2025-05-27: 1 sale — Buesinger Robert F.2025-12-22: 3 sales — Chao Albert2026-02-27: 2 sales — Bender Mark Steven2026-03-27: 2 sales — Buesinger Robert F., Bender Mark Steven2026-08-11: 2 sales — Chao Albert2004-08-162026-08-11
Insider profileRoleDateTransactionSharesPrice
Chao AlbertExecutive Chairman2026-08-11Sale31,384$80.42
Chao AlbertExecutive Chairman2026-08-11Sale7,489$79.70
Buesinger Robert F.EVP, PEM Segment Head2026-03-27Sale4,000.0$115.25
Bender Mark StevenEVP & CFO2026-03-27Sale16,413.0$112.54
Bender Mark StevenEVP & CFO2026-02-27Sale421.0$101.52
Bender Mark StevenEVP & CFO2026-02-27Sale16,988.0$100.91
Chao AlbertExecutive Chairman2025-12-22Sale521.0$74.44
Chao AlbertExecutive Chairman2025-12-22Sale30,604.0$73.8
Chao AlbertExecutive Chairman2025-12-22Sale9,711.0$72.82
Buesinger Robert F.EVP, PEM Segment Head2025-05-27Sale83.0$72.7
Buesinger Robert F.EVP, PEM Segment Head2025-04-22Purchase83.0$93.39
Chao David Tsung-HungDirector2024-11-29Sale1,750.0$129.08
Chao David Tsung-HungDirector2024-11-22Sale1,750.0$130.0
Buesinger Robert F.EVP, HIP, IT & Digital2024-05-09Sale3,500.0$158.5
Bender Mark StevenEVP & CFO2024-05-03Sale4,950.0$152.19
Buesinger Robert F.EVP, HIP, IT & Digital2024-03-15Sale3,878.0$144.5
Buesinger Robert F.EVP, HIP, IT & Digital2024-03-13Sale122.0$144.5
Bender Mark StevenEVP & CFO2024-03-06Sale4,804.0$141.02
Bender Mark StevenEVP & CFO2024-02-26Sale4,854.0$137.57
Buesinger Robert F.EVP, HIP, IT & Digital2023-11-15Sale4,215.0$130.5
Chao David Tsung-HungDirector,TenPercentOwner2023-08-23Sale1,000.0$131.0
Buesinger Robert F.EVP, HIP, IT & Digital2022-08-31Sale1,000.0$98.94
Zoeller Johnathan StevanVP & Chief Accounting Officer2022-08-26Sale542.0$107.08
Buesinger Robert F.EVP, HIP, IT & Digital2022-05-27Sale14,427.0$129.47
Chao AlbertPresident & CEO2022-05-19Sale5,045.0$129.38
Chao AlbertPresident & CEO2022-05-19Sale20,815.0$130.2
Chao AlbertPresident & CEO2022-05-19Sale12,016.0$131.11
Kearns Roger L.COO and EVP - PEM2022-05-17Sale8,388.0$136.24
Ederington L. BenjaminEVP, GC, CAO and Secretary2022-05-05Sale3,143.0$139.26
Ederington L. BenjaminEVP, GC, CAO and Secretary2022-05-05Sale9,426.0$140.0
Bender Mark StevenEVP and CFO2022-03-31Sale100.0$124.99
Bender Mark StevenEVP and CFO2022-03-31Sale5,921.0$124.34
Bender Mark StevenEVP and CFO2022-03-30Sale3,062.0$125.1
Bender Mark StevenEVP and CFO2022-03-30Sale2,938.0$124.5
Bender Mark StevenEVP and CFO2022-03-29Sale4,000.0$122.44
Kearns Roger L.COO and EVP - PEM2022-03-25Sale2,861.0$126.4
Kearns Roger L.COO and EVP - PEM2022-03-25Sale7,472.0$125.84
Bender Mark StevenEVP and CFO2022-03-25Sale2,947.0$125.74
Bender Mark StevenEVP and CFO2022-03-25Sale5,053.0$125.11
Bender Mark StevenEVP and CFO2022-03-24Sale8,000.0$125.38
Bender Mark StevenEVP and CFO2022-03-23Sale344.0$125.69
Bender Mark StevenEVP and CFO2022-03-23Sale5,656.0$125.14
Buesinger Robert F.EVP, HIP, IT & Digital2022-03-10Sale22,555.0$117.61
Buesinger Robert F.EVP, HIP, IT & Digital2022-03-09Sale2,730.0$115.55
Zoeller Johnathan StevanVP and CAO2022-03-01Sale1,006.0$110.39
Chao AlbertPresident & CEO2021-12-02Sale20,327.0$92.29
Chao AlbertPresident & CEO2021-12-02Sale7,585.0$91.52
Chao AlbertPresident & CEO2021-12-02Sale1,175.0$90.12
Chao AlbertPresident & CEO2021-12-02Sale1,700.0$89.25
Chao AlbertPresident & CEO2021-12-01Sale3,789.0$94.8
Chao AlbertPresident & CEO2021-12-01Sale4,300.0$93.98
Chao AlbertPresident & CEO2021-12-01Sale4,200.0$92.78
Chao AlbertPresident & CEO2021-12-01Sale5,842.0$91.83
Chao AlbertPresident & CEO2021-12-01Sale3,000.0$90.47
Chao AlbertPresident & CEO2021-12-01Sale9,656.0$89.47
Bender Mark StevenEVP and CFO2021-11-11Sale2,369.0$101.57
Bender Mark StevenEVP and CFO2021-11-08Sale631.0$100.77
Bender Mark StevenEVP and CFO2021-11-05Sale6,356.0$98.8
Chao AlbertPresident & CEO2021-08-11Purchase3,000.0$86.21
Buesinger Robert F.EVP, Vinyl Products2021-05-10Sale5,000.0$105.0
Bender Mark StevenEVP and CFO2021-03-12Sale5,820.0$95.23
Bender Mark StevenEVP and CFO2021-03-12Sale9,920.0$94.39
Bender Mark StevenEVP and CFO2021-03-09Sale25,811.0$92.27
Buesinger Robert F.EVP, Vinyl Products2021-03-08Sale7,861.0$95.0
Buesinger Robert F.EVP, Vinyl Products2021-03-08Sale8,652.0$92.5
Teel Lawrence E.EVP and Special Advisor to CEO2021-02-25Sale4,902.0$87.14
Teel Lawrence E.EVP and Special Advisor to CEO2021-02-25Sale28,547.0$86.93
Zoeller Johnathan StevanVP and CAO2021-02-25Sale1,006.0$86.94
Buesinger Robert F.EVP, Vinyl Products2020-11-24Sale4,581.0$77.5
Kenner AndrewSVP - Chemical Manufacturing2020-11-23Sale5,924.0$74.75
Chao AlbertPresident & CEO2020-11-06Sale4,198.0$75.12
Chao AlbertPresident & CEO2020-11-06Sale10,334.0$74.29
Chao AlbertPresident & CEO2020-11-06Sale11,978.0$73.3
Chao AlbertPresident & CEO2020-11-06Sale28,638.0$72.08
Bender Mark StevenEVP and CFO2020-11-06Sale1,600.0$74.79
Bender Mark StevenEVP and CFO2020-11-05Sale420.0$74.54
Bender Mark StevenEVP and CFO2020-11-05Sale24,576.0$73.98
TTWFGP LLCTenPercentOwner2020-03-27Purchase160,000.0$39.08
TTWFGP LLCTenPercentOwner2020-03-27Purchase11,287.0$40.31
TTWFGP LLCTenPercentOwner2020-03-27Purchase89,443.0$39.49
TTWFGP LLCTenPercentOwner2020-03-27Purchase42,295.0$38.49
TTWFGP LLCTenPercentOwner2020-03-27Purchase16,975.0$37.58
TTWFGP LLCTenPercentOwner2020-03-26Purchase145,000.0$41.0
TTWFGP LLCTenPercentOwner2020-03-26Purchase8,800.0$41.99
TTWFGP LLCTenPercentOwner2020-03-26Purchase94,001.0$41.15
TTWFGP LLCTenPercentOwner2020-03-26Purchase42,199.0$40.47
TTWFGP LLCTenPercentOwner2020-03-25Purchase130,000.0$40.77
TTWFGP LLCTenPercentOwner2020-03-25Purchase24,064.0$42.69
TTWFGP LLCTenPercentOwner2020-03-25Purchase33,358.0$42.02
TTWFGP LLCTenPercentOwner2020-03-25Purchase14,025.0$40.96
TTWFGP LLCTenPercentOwner2020-03-25Purchase27,671.0$39.83
TTWFGP LLCTenPercentOwner2020-03-25Purchase24,231.0$38.87
TTWFGP LLCTenPercentOwner2020-03-25Purchase6,651.0$37.98
TTWFGP LLCTenPercentOwner2020-03-24Purchase145,000.0$36.53
TTWFGP LLCTenPercentOwner2020-03-24Purchase15,031.0$37.6
TTWFGP LLCTenPercentOwner2020-03-24Purchase67,812.0$36.86
TTWFGP LLCTenPercentOwner2020-03-24Purchase57,419.0$36.0
TTWFGP LLCTenPercentOwner2020-03-24Purchase4,738.0$34.94
TTWFGP LLCTenPercentOwner2020-03-19Purchase165,000.0$37.66
TTWFGP LLCTenPercentOwner2020-03-19Purchase21,777.0$39.09