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Video: Compound Annual Growth Rate (CAGR) Definition
WLK Historical Price Range
Date Open High Low Close Volume
09/08/2026 $75.56 $76.14 $74.63 $74.75 561.10K
09/09/2026 $72.70 $73.39 $70.74 $71.78 846.70K
09/10/2026 $71.87 $73.75 $70.69 $71.62 891.90K
09/11/2026 $71.94 $72.50 $70.44 $70.81 533.80K
09/14/2026 $71.05 $72.48 $68.63 $68.96 976.50K
About Westlake
Westlake Corporation is a manufacturer and supplier of materials and products that enhance life every day. Co. has operations in Asia, Europe, and North America. It provides building blocks for solutions from housing and construction to packaging and healthcare to automotive and the consumer. Its segments include Performance and Essential Materials and Housing and Infrastructure Products. The Performance and Essential Materials includes Westlake North American Vinyls, Westlake North American Chlor-alkali & Derivatives, Westlake European & Asian Chlorovinyls, Westlake Olefins, Westlake Polyethylene and Westlake Epoxy.
WLK historical stock prices picture
Westlake (WLK) has the following price history information. Looking back at WLK historical stock prices for the last five trading days, on September 08, 2026, WLK opened at $75.56, traded as high as $76.14 and as low as $74.63, and closed at $74.75. Trading volume was a total of 561.10K shares. On September 09, 2026, WLK opened at $72.70, traded as high as $73.39 and as low as $70.74, and closed at $71.78. Trading volume was a total of 846.70K shares. On September 10, 2026, WLK opened at $71.87, traded as high as $73.75 and as low as $70.69, and closed at $71.62. Trading volume was a total of 891.90K shares. On September 11, 2026, WLK opened at $71.94, traded as high as $72.50 and as low as $70.44, and closed at $70.81. Trading volume was a total of 533.80K shares. On September 14, 2026, WLK opened at $71.05, traded as high as $72.48 and as low as $68.63, and closed at $68.96. Trading volume was a total of 976.50K shares.

WLK Historical Stock Prices By Date:

WLK historical cagr picture

Below, we examine the compound annual growth rate — CAGR for short — of an investment into Westlake shares, starting with a $10,000 purchase of WLK, and working forward through the historical stock price information to today.

Growth of $10,000.00
With Dividends Reinvested
Start date: 09/16/2016
End date: 09/14/2026
Start price/share: $50.20
End price/share: $68.96
Starting shares: 199.20
Ending shares: 232.80
Dividends reinvested/share: $13.92
Total return: 60.54%
Average Annual Total Return: 4.85%
Starting investment: $10,000.00
Ending investment: $16,057.74
Years: 10.00
 
Growth of $10,000.00
Without Dividends Reinvested
Start date: 09/16/2016
End date: 09/14/2026
Start price/share: $50.20
End price/share: $68.96
Dividends collected/share: $13.92
Total return: 65.10%
Average Annual Total Return: 5.14%
Starting investment: $10,000.00
Ending investment: $16,507.44
Years: 10.00
WLK Historical Closing Prices
Date Close
09/08/2026$74.75
09/09/2026$71.78
09/10/2026$71.62
09/11/2026$70.81
09/14/2026$68.96
Materials Historical Prices
WLK is categorized under the Materials sector; below are some other companies in the same sector:

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Also explore: WLK shares outstanding history

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