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WLK Insider Trading

Insider Ownership Percentage: 1.30%
Insider Buying (Last 12 Months): $7,751.37
Insider Selling (Last 12 Months): $6,034.10

Westlake Insider Trading History Chart

This chart shows the insider buying and selling history at Westlake by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Westlake Share Price & Price History

Current Price: $67.89
Price Change: ▼ Price Decrease of -0.82 (-1.19%)
As of 12/4/2025 04:59 PM ET

This chart shows the closing price history over time for WLK up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Westlake Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
5/27/2025Robert F BuesingerEVPSell83$72.70$6,034.1034,932View SEC Filing Icon  
4/22/2025Robert F BuesingerEVPBuy83$93.39$7,751.3783View SEC Filing Icon  
11/29/2024David Tsung-Hung ChaoDirectorSell1,750$129.08$225,890.007,784View SEC Filing Icon  
11/22/2024David Tsung-Hung ChaoDirectorSell1,750$130.00$227,500.009,534View SEC Filing Icon  
5/3/2024Mark Steven BenderCFOSell4,950$152.19$753,340.5040,356View SEC Filing Icon  
3/15/2024Robert F BuesingerEVPSell3,878$144.50$560,371.0021,144View SEC Filing Icon  
3/13/2024Robert F BuesingerEVPSell122$144.50$17,629.0025,022View SEC Filing Icon  
3/6/2024Mark Steven BenderCFOSell4,804$141.02$677,460.0845,306View SEC Filing Icon  
2/26/2024Mark Steven BenderCFOSell4,854$137.57$667,764.7850,110View SEC Filing Icon  
11/15/2023Robert F BuesingerEVPSell4,215$130.50$550,057.5016,754View SEC Filing Icon  
8/23/2023David Tsung-Hung ChaoDirectorSell1,000$131.00$131,000.0010,148View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for Westlake (NYSE:WLK)

28.40% of Westlake stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at WLK by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Westlake Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
11/24/2025CIBC Private Wealth Group LLC686$53K0.0%N/A0.001%Search for SEC Filing on Google Icon
11/20/2025Wilmington Savings Fund Society FSB1,001$77K0.0%+1,167.1%0.001%Search for SEC Filing on Google Icon
11/19/2025Caitong International Asset Management Co. Ltd366$28K0.0%N/A0.000%Search for SEC Filing on Google Icon
11/17/2025Jacobs Levy Equity Management Inc.860,723$66.33M0.3%-12.6%0.671%Search for SEC Filing on Google Icon
11/17/2025Woodline Partners LP193,786$14.93M0.1%-40.8%0.151%Search for SEC Filing on Google Icon
11/17/2025Dark Forest Capital Management LP57,492$4.43M0.1%-37.8%0.045%Search for SEC Filing on Google Icon
11/17/2025Zimmer Partners LP90,000$6.94M0.1%N/A0.070%Search for SEC Filing on Google Icon
11/17/2025Alyeska Investment Group L.P.119,986$9.25M0.0%-49.6%0.094%Search for SEC Filing on Google Icon
11/17/2025Voloridge Investment Management LLC394,307$30.39M0.1%-24.2%0.307%Search for SEC Filing on Google Icon
11/17/2025Verition Fund Management LLC27,155$2.09M0.0%-35.2%0.021%Search for SEC Filing on Google Icon
11/17/2025Scientech Research LLC9,742$0.75M0.3%N/A0.008%Search for SEC Filing on Google Icon
11/17/2025Polymer Capital Management US LLC16,200$1.25M0.1%-2.2%0.013%Search for SEC Filing on Google Icon
11/17/2025Mercer Global Advisors Inc. ADV4,241$0.33M0.0%-19.5%0.003%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC106,320$8.19M0.0%-86.5%0.083%Search for SEC Filing on Google Icon
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.855,976$65.96M0.1%+1.4%0.667%Search for SEC Filing on Google Icon
11/17/2025Lighthouse Investment Partners LLC11,661$0.90M0.0%N/A0.009%Search for SEC Filing on Google Icon
11/17/2025Jain Global LLC12,417$0.96M0.0%N/A0.010%Search for SEC Filing on Google Icon
11/17/2025Holocene Advisors LP854,184$65.82M0.1%+440.1%0.666%Search for SEC Filing on Google Icon
11/17/2025Gotham Asset Management LLC22,065$1.70M0.0%+82.7%0.017%Search for SEC Filing on Google Icon
11/17/2025Brevan Howard Capital Management LP7,406$0.57M0.0%-72.4%0.006%Search for SEC Filing on Google Icon
11/17/2025Aventail Capital Group LP78,340$6.04M0.3%N/A0.061%Search for SEC Filing on Google Icon
11/17/2025California Public Employees Retirement System46,784$3.61M0.0%-21.9%0.036%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE208,897$16.10M0.0%+50.7%0.163%Search for SEC Filing on Google Icon
11/17/2025Aquatic Capital Management LLC29,130$2.25M0.0%N/A0.023%Search for SEC Filing on Google Icon
11/17/2025Alliancebernstein L.P.66,762$5.15M0.0%-2.7%0.052%Search for SEC Filing on Google Icon
11/17/2025Ameriprise Financial Inc.84,437$6.51M0.0%-15.2%0.066%Search for SEC Filing on Google Icon
11/14/2025Schonfeld Strategic Advisors LLC45,990$3.54M0.0%+322.4%0.036%Search for SEC Filing on Google Icon
11/14/2025Creative Planning13,329$1.03M0.0%+19.4%0.010%Search for SEC Filing on Google Icon
11/14/2025Lazard Asset Management LLC72,622$5.60M0.0%-2.0%0.057%Search for SEC Filing on Google Icon
11/14/2025Raymond James Financial Inc.4,756$0.37M0.0%-10.2%0.004%Search for SEC Filing on Google Icon
11/14/2025Amundi26,773$2.19M0.0%-61.6%0.021%Search for SEC Filing on Google Icon
11/14/2025Caisse de depot et placement du Quebec368,318$28.38M0.1%N/A0.287%Search for SEC Filing on Google Icon
11/14/2025Merewether Investment Management LP268,400$20.68M0.5%N/A0.209%Search for SEC Filing on Google Icon
11/14/2025Occudo Quantitative Strategies LP27,412$2.11M0.3%+81.2%0.021%Search for SEC Filing on Google Icon
11/14/2025Balyasny Asset Management L.P.475,743$36.66M0.0%+495.8%0.371%Search for SEC Filing on Google Icon
11/14/2025UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC917,273$70.69M0.0%+40.7%0.715%Search for SEC Filing on Google Icon
11/14/2025Two Sigma Investments LP102,965$7.93M0.0%-15.7%0.080%Search for SEC Filing on Google Icon
11/14/2025Concentric Capital Strategies LP64,158$4.94M0.2%+21.3%0.050%Search for SEC Filing on Google Icon
11/14/2025Squarepoint Ops LLC100,391$7.74M0.0%+6.3%0.078%Search for SEC Filing on Google Icon
11/14/2025Comerica Bank28,262$2.18M0.0%-17.7%0.022%Search for SEC Filing on Google Icon
11/13/2025Jump Financial LLC77,894$6M0.1%N/A0.061%Search for SEC Filing on Google Icon
11/13/2025Entropy Technologies LP5,817$0.45M0.0%-24.0%0.005%Search for SEC Filing on Google Icon
11/13/2025HITE Hedge Asset Management LLC100,000$7.71M0.4%-12.7%0.078%Search for SEC Filing on Google Icon
11/13/2025Invesco Ltd.134,699$10.38M0.0%+8.1%0.105%Search for SEC Filing on Google Icon
11/13/2025Arrowstreet Capital Limited Partnership299,728$23.10M0.0%+3.3%0.234%Search for SEC Filing on Google Icon
11/13/2025Sei Investments Co.14,767$1.14M0.0%-35.1%0.012%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG560,480$43.19M0.0%+26.4%0.437%Search for SEC Filing on Google Icon
11/13/2025BNP Paribas Financial Markets190,966$14.72M0.0%+3.0%0.149%Search for SEC Filing on Google Icon
11/13/2025Mackenzie Financial Corp25,320$1.95M0.0%N/A0.020%Search for SEC Filing on Google Icon
11/13/2025Magnetar Financial LLC3,329$0.26M0.0%-53.7%0.003%Search for SEC Filing on Google Icon
11/13/2025Legal & General Group Plc36,632$2.82M0.0%-51.2%0.029%Search for SEC Filing on Google Icon
11/13/2025Schroder Investment Management Group261,562$20.15M0.0%+5.1%0.204%Search for SEC Filing on Google Icon
11/13/2025CoreFirst Bank & Trust2,250$0.17M0.1%+58.5%0.002%Search for SEC Filing on Google Icon
11/13/2025Parallel Advisors LLC778$60K0.0%+58.1%0.001%Search for SEC Filing on Google Icon
11/13/2025First Trust Advisors LP164,936$12.71M0.0%+28.9%0.129%Search for SEC Filing on Google Icon
11/12/2025Gamco Investors INC. ET AL4,141$0.32M0.0%-64.2%0.003%Search for SEC Filing on Google Icon
11/12/2025Impala Asset Management LLC115,000$8.86M6.0%N/A0.090%Search for SEC Filing on Google Icon
11/12/2025Dimensional Fund Advisors LP1,300,240$100.20M0.0%+2.0%1.014%Search for SEC Filing on Google Icon
11/12/2025South Dakota Investment Council22,435$1.73M0.0%+1.4%0.017%Search for SEC Filing on Google Icon
11/12/2025Teachers Retirement System of The State of Kentucky165,315$12.74M0.1%+57.4%0.129%Search for SEC Filing on Google Icon
11/12/2025Victory Capital Management Inc.2,866,360$220.88M0.1%-23.0%2.235%Search for SEC Filing on Google Icon
11/12/2025CI Investments Inc.4,184$0.32M0.0%-45.6%0.003%Search for SEC Filing on Google Icon
11/12/2025Sprott Inc.130,000$10.02M0.4%+4.0%0.101%Search for SEC Filing on Google Icon
11/12/2025Quantbot Technologies LP56,785$4.38M0.1%N/A0.044%Search for SEC Filing on Google Icon
11/12/2025Erste Asset Management GmbH260,000$20.03M0.2%+51.6%0.203%Search for SEC Filing on Google Icon
11/12/2025Xponance Inc.3,739$0.29M0.0%-22.0%0.003%Search for SEC Filing on Google Icon
11/12/2025Mitsubishi UFJ Asset Management Co. Ltd.6,352$0.49M0.0%-5.7%0.005%Search for SEC Filing on Google Icon
11/12/2025Robotti Robert181,851$14.01M2.4%-0.5%0.142%Search for SEC Filing on Google Icon
11/12/2025US Bancorp DE2,433$0.19M0.0%-7.3%0.002%Search for SEC Filing on Google Icon
11/10/2025Dana Investment Advisors Inc.19,197$1.48M0.0%-3.0%0.015%Search for SEC Filing on Google Icon
11/10/2025Ameritas Investment Partners Inc.18,640$1.44M0.0%+61.1%0.015%Search for SEC Filing on Google Icon
11/10/2025Journey Advisory Group LLC45,072$3.47M0.3%+0.5%0.035%Search for SEC Filing on Google Icon
11/10/2025Citigroup Inc.117,151$9.03M0.0%+61.3%0.091%Search for SEC Filing on Google Icon
11/10/2025ANTIPODES PARTNERS Ltd555,904$42.84M1.0%-32.5%0.433%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.3,439,631$265.06M0.0%-2.4%2.682%Search for SEC Filing on Google Icon
11/7/2025JPMorgan Chase & Co.157,794$12.16M0.0%-5.8%0.123%Search for SEC Filing on Google Icon
11/6/2025Rhumbline Advisers88,859$6.85M0.0%-2.0%0.069%Search for SEC Filing on Google Icon
11/6/2025ProShare Advisors LLC422,640$32.57M0.1%+19.0%0.330%Search for SEC Filing on Google Icon
11/5/2025BI Asset Management Fondsmaeglerselskab A S3,699$0.29M0.0%N/A0.003%Search for SEC Filing on Google Icon
11/5/2025Envestnet Asset Management Inc.27,446$2.12M0.0%+34.6%0.021%Search for SEC Filing on Google Icon
11/5/2025Hantz Financial Services Inc.740$57K0.0%+180.3%0.001%Search for SEC Filing on Google Icon
11/4/2025Peterson Wealth Services1,835$0.14M0.0%+7,878.3%0.001%Search for SEC Filing on Google Icon
11/4/2025Principal Financial Group Inc.74,113$5.71M0.0%-2.0%0.058%Search for SEC Filing on Google Icon
11/4/2025Thrivent Financial for Lutherans7,661$0.59M0.0%-2.4%0.006%Search for SEC Filing on Google Icon
11/3/2025New York State Common Retirement Fund309,626$23.86M0.0%+1.0%0.241%Search for SEC Filing on Google Icon
11/3/2025Federated Hermes Inc.3,029$0.23M0.0%+131.8%0.002%Search for SEC Filing on Google Icon
10/31/2025Vanguard Personalized Indexing Management LLC9,344$0.72M0.0%-7.0%0.007%Search for SEC Filing on Google Icon
10/31/2025Mutual of America Capital Management LLC15,400$1.19M0.0%-7.1%0.012%Search for SEC Filing on Google Icon
10/31/2025Retirement Systems of Alabama40,315$3.11M0.0%-1.1%0.031%Search for SEC Filing on Google Icon
10/30/2025Covestor Ltd1,779$0.14M0.1%+134.4%0.001%Search for SEC Filing on Google Icon
10/30/2025Universal Beteiligungs und Servicegesellschaft mbH9,473$0.73M0.0%+6.5%0.007%Search for SEC Filing on Google Icon
10/29/2025Grey Fox Wealth Advisors LLC1,154$89K0.0%N/A0.001%Search for SEC Filing on Google Icon
10/28/2025Wilmington Savings Fund Society FSB1,001$77K0.0%+1,167.1%0.001%Search for SEC Filing on Google Icon
10/27/2025Manning & Napier Advisors LLC4,188$0.32M0.0%-79.8%0.003%Search for SEC Filing on Google Icon
10/24/2025Oregon Public Employees Retirement Fund6,668$0.51M0.0%-2.9%0.005%Search for SEC Filing on Google Icon
10/24/2025State of Alaska Department of Revenue3,649$0.28M0.0%-86.8%0.003%Search for SEC Filing on Google Icon
10/23/2025SG Americas Securities LLC6,939$0.54M0.0%-87.3%0.005%Search for SEC Filing on Google Icon
10/20/2025Allspring Global Investments Holdings LLC546,151$41.92M0.1%+4.9%0.426%Search for SEC Filing on Google Icon
10/17/2025Deprince Race & Zollo Inc.189,009$14.57M0.3%-25.4%0.147%Search for SEC Filing on Google Icon
10/15/2025Pacer Advisors Inc.6,010$0.46M0.0%N/A0.005%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Westlake logo
Westlake Corporation engages in the manufacture and marketing of performance and essential materials, and housing and infrastructure products in the United States, Canada, Germany, China, Mexico, Brazil, France, Italy, Taiwan, and internationally. The company operates through two segments: Performance and Essential Materials and Housing and Infrastructure Products. The Performance and Essential Materials segment offers ethylene, polyethylene, styrene, chlorinated derivative products, ethylene dichloride, vinyl chloride monomer, polyvinyl chloride (PVC), epoxy specialty resins, and base epoxy resins and intermediaries, as well as chlor-alkali, such as chlorine and caustic soda. The Housing and Infrastructure Products segment provides residential PVC sidings; PVC trim and mouldings; architectural stone veneers; windows; PVC decking; PVC films for various inflatables, wallcovering, and tape and roofing applications; polymer composite and cement roof tiles; PVC pipes and fittings for various water, sewer, electrical, and industrial applications; PVC compounds used in various housing, medical, and automobile products; and consumer and commercial products, such as landscape edging; industrial, home, and office matting; marine dock edging; and masonry joint controls. It offers its products to chemical processors, plastics fabricators, small construction contractors, municipalities, and supply warehouses for use in various consumer and industrial markets, including residential construction, flexible and rigid packaging, automotive products, healthcare products, water treatment, wind turbines, and coatings, as well as other durable and non-durable goods. The company was formerly known as Westlake Chemical Corporation and changed its name to Westlake Corporation in February 2022. Westlake Corporation was founded in 1986 and is headquartered in Houston, Texas. Westlake Corporation operates as a subsidiary of TTWF LP.
Read More on Westlake

Today's Range

Now: $67.89
Low: $67.28
High: $69.17

50 Day Range

MA: $70.77
Low: $56.51
High: $82.41

52 Week Range

Now: $67.89
Low: $56.33
High: $128.85

Volume

2,100,790 shs

Average Volume

1,517,928 shs

Market Capitalization

$8.71 billion

P/E Ratio

N/A

Dividend Yield

3.09%

Beta

0.94

Who are the company insiders with the largest holdings of Westlake?

Westlake's top insider investors include:
  1. Mark Steven Bender (CFO)
  2. Robert F Buesinger (EVP)
  3. David Tsung-Hung Chao (Director)
Learn More about top insider investors at Westlake.

Who are the major institutional investors of Westlake?

Westlake's top institutional shareholders include:
  1. Vanguard Group Inc. — 2.68%
  2. Victory Capital Management Inc. — 2.23%
  3. Dimensional Fund Advisors LP — 1.01%
  4. UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC — 0.72%
  5. Jacobs Levy Equity Management Inc. — 0.67%
  6. MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. — 0.67%
Learn More about top institutional investors of Westlake stock.

Which institutional investors are selling Westlake stock?

Within the last quarter, WLK stock was sold by these institutional investors:
  1. Victory Capital Management Inc.
  2. Millennium Management LLC
  3. Susquehanna International Group LLP
  4. ANTIPODES PARTNERS Ltd
  5. Woodline Partners LP
  6. Voloridge Investment Management LLC
  7. Jacobs Levy Equity Management Inc.
  8. Alyeska Investment Group L.P.

Which institutional investors are buying Westlake stock?

Within the last quarter, WLK stock was bought by institutional investors including:
  1. Holocene Advisors LP
  2. Balyasny Asset Management L.P.
  3. Caisse de depot et placement du Quebec
  4. Merewether Investment Management LP
  5. UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC
  6. Nomura Holdings Inc.
  7. UBS Group AG
  8. Impala Asset Management LLC