Westlake (WLK) Insider Trading & Ownership $88.31 -1.27 (-1.42%) As of 03:29 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Insider Trades Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Westlake (NYSE:WLK) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage1.30%Number OfInsiders Buying(Last 12 Months)1Amount OfInsider Buying(Last 12 Months)$7.75KNumber OfInsiders Selling(Last 12 Months)2Amount OfInsider Selling(Last 12 Months)$459.42K Get WLK Insider Trade Alerts Want to know when executives and insiders are buying or selling Westlake stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily. 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WLK Insider Buying and Selling by Quarter Westlake Insider and Congressional Trades History Insiders and Members of Congress Insiders Only Members of Congress Only Transaction Type Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 2 Years 3 Years Time Frame Start Date End Date Export to Excel Transaction DateNameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails5/27/2025Robert F BuesingerEVPSell83$72.70$6,034.10 4/22/2025Robert F BuesingerEVPBuy83$93.39$7,751.37 11/29/2024David Tsung-Hung ChaoDirectorSell1,750$129.08$225,890.00 11/22/2024David Tsung-Hung ChaoDirectorSell1,750$130.00$227,500.00 (Data available from 1/1/2013 forward) WLK Insider Trading Activity - Frequently Asked Questions Who is on Westlake's Insider Roster? The list of insiders at Westlake includes David Tsung-Hung Chao, Mark Steven Bender, and Robert F Buesinger. Learn more on insiders at WLK. What percentage of Westlake stock is owned by insiders? 1.30% of Westlake stock is owned by insiders. Learn more on WLK's insider holdings. Which Westlake insiders have been buying company stock? The following insider purchased WLK shares in the last 24 months: Robert F Buesinger ($7,751.37). How much insider buying is happening at Westlake? Insiders have purchased a total of 83 WLK shares in the last 24 months for a total of $7,751.37 bought. Which Westlake insiders have been selling company stock? The following insiders have sold WLK shares in the last 24 months: David Tsung-Hung Chao ($453,390.00), Mark Steven Bender ($2,098,565.36), and Robert F Buesinger ($1,134,091.60). How much insider selling is happening at Westlake? Insiders have sold a total of 26,406 Westlake shares in the last 24 months for a total of $3,686,046.96 sold. Westlake Key ExecutivesMr. James Y. Chao (Age 76)Executive Chairman of the Board Compensation: $3.35MMr. Mark Steven Bender CPA (Age 67)Executive VP & CFO Compensation: $2.2MMr. L. Benjamin Ederington (Age 53)Executive VP of Performance & Essential Materials, General Counsel and Chief Administrative Officer Compensation: $1.99MMr. Robert F. Buesinger (Age 67)Executive Vice President of Housing, Infrastructure Products, IT & Digital Compensation: $1.85M2 recent tradesMr. Jean-Marc Gilson (Age 61)President & CEO Mr. Jeffrey A. HolyVP & Chief Accounting OfficerLawrence SchubertVice President of Corporate Development & SustainabilityMr. Thomas J. Janssens (Age 57)Senior Vice President of Operations, PEM & Corporate Logistics Mr. Johnathan Stevan Zoeller (Age 48)VP & Treasurer More Insider Trading Tools from MarketBeat Related Companies AdvanSix Insider Trades Cabot Insider Trades Celanese Insider Trades DOW Insider Trades Eastman Chemical Insider Trades Huntsman Insider Trades LyondellBasell Industries Insider Trades Olin Insider Trades Hawkins Insider Trades Kronos Worldwide Insider Trades Insider Tracking Tools CEO Purchases/Sales CFO Purchases/Sales Top Insider Buying Stocks Top Insider Selling Stocks Insider Trades Screener Insider Trades Newsletter Congressional Stock Trades Insider Trading By Country U.S. Insider Trading Activity Canadian Insider Trading Activity U.K. Insider Trading Activity Australia Insider Trading Activity Latest Articles Insiders Sell These High-Quality Stocks: Why Investors Shouldn’tCoreWeave and Madrigal's Insider Trades Flash Bullish SignalsPalantir Insider Selling: Risk Signal or Normal Activity?Loop Industries Insiders Buy Stock, Signal Confidence in OutlookDueling Insider Moves: Heavy Buying Here, Big Selling There This page (NYSE:WLK) was last updated on 9/12/2025 by MarketBeat.com Staff From Our PartnersMarket Panic: Trump Just Dropped a Bomb on Your Stockstock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tarif...American Alternative | SponsoredTrump’s national nightmare is herePorter Stansberry and Jeff Brown say a new U.S. national emergency is already underway — and it could trigger ...Porter & Company | SponsoredStunning new initiative unfolding in the White House?what I just learned about what’s unfolding in the White House is truly stunning… And you need to see it for...Paradigm Press | SponsoredForget NVDA. 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