Market cap
$8.661 B
$67.77 -1.88%
Close of 21 Sept 2026
Revenue
$11.2B
#389 by revenue
Earnings
-$1.51B
Loss-making
Shares outstanding
127,796,548
Latest filing cover page
P/E ratio
—
Cap ÷ net income
Major Chemicals, ranked by market cap
All 70 →What if Westlake were worth as much as…
Open the what-if tool →Where these numbers come from
Share counts and financials for Westlake are taken from its own SEC filings via EDGAR: public record, not an estimate. Market cap is shares outstanding multiplied by the latest close. Last updated 22 Sept 2026. Read the methodology.