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Westlake WLK · USD

Materials · US listing · 🇺🇸 United States

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64.13

+1.01%

Close of 9 Nov 2026, in USD

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Reference data, closing prices and charts across 45,000 companies, plus crypto, commodities and currencies.

Largest shareholders

As filed, so dates differ, and a group and its funds can both appear.

HolderSharesStakeChangeFiled
ORBIS ALLAN GRAY LTD5.3m4.13%+906.9k31 Mar 2026
Orbis Investment Management Ltd.4.4m3.42%+472.2k31 Dec 2025
Wellington Management Company, LLP4.2m3.29%+4.2m31 Dec 2025
CAPITAL WORLD INVESTORS4.2m3.28%+2m31 Mar 2026
The Vanguard Group, Inc.3.9m3.05%+466.8k31 Dec 2025
BLACKROCK, INC.3.1m2.40%−182.3k31 Mar 2026
BlackRock Institutional Trust Company, N.A.2.9m2.25%+66k31 Dec 2025
PRICE T ROWE ASSOCIATES INC /MD/2.4m1.88%+198.7k31 Mar 2026
T. Rowe Price Associates, Inc.2.2m1.70%−86931 Dec 2025
Capital World Investors2.2m1.69%+2.2m31 Dec 2025
Dimensional Fund Advisors, L.P.1.9m1.47%+585.4k31 Dec 2025
BRANDES INVESTMENT PARTNERS, LP1.8m1.44%+172.3k31 Mar 2026
WELLINGTON MANAGEMENT GROUP LLP1.8m1.40%−2.4m31 Mar 2026
VANGUARD PORTFOLIO MANAGEMENT LLC1.8m1.38%+1.8m31 Mar 2026
Brandes Investment Partners, L.P.1.7m1.30%+121.6k31 Dec 2025

Insider trades

Purchases and sales by directors and officers, as filed with the regulator

DateWhoTypeSharesPriceValue
27 Mar 2026 ↗Buesinger Robert F.EVP, PEM Segment HeadSale4k115.25$461,000
27 Mar 2026 ↗Bender Mark StevenEVP & CFOSale16.4k112.53$1.8m
27 Feb 2026 ↗Bender Mark StevenEVP & CFOSale17.4k100.92$1.8m

Short interest

Shares sold short, 15 Oct 2026. US exchange data.

4.3m

-12.5% on the period before. 3.9 days to cover.

Short volume

Share of the day's trading sold short, 4 Nov 2026

70.9%

Last 60 trading days.

Failed deliveries

Shares not delivered on settlement, from the SEC

  • 26 Aug 2026100 shares
  • 25 Aug 202657,174 shares
  • 14 Aug 20263,087 shares
  • 13 Aug 20263,302 shares
  • 12 Aug 2026707 shares

Sources and methodology

Data on this tab
Our data supplier
Chart on the Overview
TradingView

Nothing here is investment advice. Prices can be delayed or wrong, so check with the exchange before relying on them. Data for this page. How we cover markets.