Westlake (WLK) Market Cap 2004–2026

As of October 29, 2026, Westlake had a market cap of $8.436 billion, which increased by 0.27% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.

Data updated: Oct 29, 2026, 4:00 PM ET
Westlake logo

Westlake Corp. (WLK)

🌍 United States 📈 NYSE 🏭 Basic Materials 🏢 Chemicals
Latest Market Cap
$8.436B ▲ 0.27%
Start of 2026
$9.485B ▼ 11.06%
1 Year Ago
$8.758B ▼ 3.68%
All-Time High
$20.836B ▼ 59.51%


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Note: Each point on the chart represents the market capitalization at the end of the trading day.
Source: Data compiled from EDGAR filings, Bloomberg and Yahoo Finance.

📈 Westlake Market Cap History by Year and Month

Westlake Market Cap History by Year and Month
Year / MonthMarket Cap% Change
2026$8.436B▼ 11.06%
$8.436B▲ 5.94%
$7.963B▼ 17.00%
$9.594B▲ 6.22%
$9.032B▼ 3.42%
$9.352B▼ 15.90%
$11.12B▼ 24.61%
$14.75B▼ 1.27%
$14.94B▲ 10.50%
$13.52B▲ 32.94%
$10.17B▲ 7.22%
2025$9.485B▼ 35.48%
2024$14.702B▼ 18.02%
2023$17.934B▲ 37.13%
2022$13.078B▲ 5.26%
All market cap values reflect closing prices for the period shown.

📊 Westlake Market Cap and Other Industry Peers

Below are selected companies from the Basic Materials sector / subsector:

  1. $24.34B
  2. $21.11B
  3. $17.9B
  4. $13.04B
  5. $11.01B
  6. $9.94B
  7. $8.59B
  8. $8.44B
  9. $7.77B
  10. $7.65B
  11. $7.39B
  12. $7.19B
  13. $5.8B
  14. $5.3B
  15. $3.6B
  16. $3.41B
  17. $1.99B
  18. $1.83B
  19. $1.56B
  20. $0.59B

Data reflect the most recent market capitalization values available.

Note: Market capitalization figures are based on available sources and may differ slightly from actual values, particularly for historical data.