Investor Alert

Westlake Corp.



After Hours

 --Quotes are delayed by 20 min

May 18, 2022, 5:49 p.m.





-0.79 -0.60%


Volume 4,481

Quotes are delayed by 20 min


Today's close

$ 136.29

$ 131.04


-5.25 -3.85%

Day low

Day high




52 week low

52 week high




Mark A. McCollum

Mark A. McCollum holds the position of President of Petris Technology, Inc. and Chief Financial Officer & Executive Vice President at Halliburton Group Canada, Inc. He is also Member of The American Institute of Certified Public Accountants, Member of Financial Executives International, Member of Texas Society of Certified Public Accountants and Member of Institute of Management Accountants, Inc. and on the board of 6 other companies.

In his past career Mr. McCollum was Chairman of Star of Hope Mission, President, Chief Executive Officer & Director at Weatherford International Plc, Chief Financial & Integration Officer, EVP at Halliburton Co. and Chief Accounting Officer & Senior Vice President for Halliburton Energy Services Group (a subsidiary of Halliburton Co.), Chief Financial Officer & Senior Vice President of Tenneco, Inc. and Audit Partner at Arthur Andersen LLP.

Mr. McCollum received an undergraduate degree from Baylor University.


Date Shares Transaction Value
03/03/2022 3,000   Gift at $0 per share. 0
08/14/2021 2,400   Derivative/Non-derivative trans. at $0 per share. 0
08/16/2020 2,387   Derivative/Non-derivative trans. at $0 per share. 0
08/17/2019 1,409   Derivative/Non-derivative trans. at $0 per share. 0
05/18/2019 987   Derivative/Non-derivative trans. at $0 per share. 0

Officers and Executives

Mr. James Yuan Chao
Mr. Albert Yuan Chao
President, Chief Executive Officer & Director
Mr. Roger Lester Kearns
Chief Operating Officer & Executive Vice President
Mr. Mark Steven Bender
Chief Financial Officer, Treasurer & Senior VP
Mr. L. Benjamin Ederington
Secretary, CAO, Senior VP & General Counsel
Mr. Jeff Holy
Vice President
Mr. Andrew Kenner
Senior Vice President-Chemical Manufacturing
Mr. Robert Ford Buesinger
Executive Vice President-Vinyl Product
Ms. Dorothy C. Jenkins
Mr. David Tsung-Hung Chao
Mr. John T. Chao
Mr. Johnathan S. Zoeller
Chief Accounting Officer, Controller & VP
Ms. Kimberly S. Lubel
Independent Director
Mr. Michael J. Graff
Independent Director
Mr. R. Bruce Northcutt
Independent Director
Mr. Marius A. Haas
Independent Director
Mr. Jeffrey W. Sheets
Independent Director
Mr. Mark A. McCollum
Independent Director
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