SuperworthWestlake market cap WLK
Share price times shares outstanding: what the whole company sells for, since 2011.
- Today, Oct 23, 2026
- $8.3B
- Highest close in our data
- $20.6B
- May 2024
Westlake is worth $8.3B at the close on Oct 23, 2026, at $64.56 a share.
That is down 19% over the last year and down 34% over five years.
Its highest close in our data was $20.6B in May 2024.
Market cap over time
Year by year
| Year | End of year | Low | High | Change |
|---|---|---|---|---|
| 2026 so far | $8.3B | $8B | $15.3B | −13% |
| 2025 | $9.5B | $7.6B | $15.2B | −36% |
| 2024 | $14.7B | $14.6B | $20.6B | −18% |
| 2023 | $17.9B | $13.3B | $18.1B | +37% |
| 2022 | $13.1B | $10.6B | $17.6B | +5% |
| 2021 | $12.4B | $9.8B | $13.5B | +19% |
| 2020 | $10.4B | $4.3B | $10.7B | +16% |
| 2019 | $9B | $7.3B | $10.4B | +7% |
| 2018 | $8.3B | $7.9B | $15.7B | −39% |
| 2017 | $13.8B | $7.6B | $13.8B | +91% |
| 2016 | $7.2B | $5.5B | $7.5B | +2% |
| 2015 | $7.1B | $6.7B | $10.3B | −14% |
| 2014 | $8.2B | $4.2B | $13B | +2% |
| 2013 | $8.1B | $5.5B | $8.1B | +56% |
| 2012 | $5.2B | $2.7B | $5.2B | +103% |
| 2011 | $2.5B | $2.2B | $2.8B | n/a |
Against its peers
Companies in Chemicals - Specialty nearest Westlake's size, closest first, today.
| Company | Market cap |
|---|---|
| WLKWestlake | $8.3B |
| NEUNewmarket | $8B |
| AXTAAxalta Coating Systems | $7.3B |
| CLXClorox | $10.4B |
| SXTSensient Technologies | $5.6B |
| RPMRPM International | $12.6B |
| LYBLyondellBasell Industries | $21.5B |
| IFFInternational Flavors & Fragrances | $24B |
| PPGPPG Industries | $24.6B |
| REXREX AMERICAN RESOURCES | $1.3B |
| APDAir Products and Chemicals | $68.4B |
| Peer median | $11.5B |
What the market cap tells you
Share price times shares outstanding: what the whole company sells for today.
Size, not quality. Large caps move slower and are covered more. That is all it tells you.
More on Westlake
Valuation data, not investment advice. Prices as of . Reported figures come from the company's filings with the SEC.