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Westlake price to book ratio WLK

Market value divided by the book value of the company's net assets, since 2011.

Today, Oct 23, 2026
0.9×
10-year median
1.6×
Against its 10-year history
5th
percentile: 0 is its lowest day, 100 its highest
10-year range
0.7× to 3.6×
Peer median
3.3×

Westlake's price to book ratio is 0.9× as of Oct 23, 2026.

That is below its ten-year median of 1.6×, lower than on 95% of days in the last ten years.

Over that time it ranged from 0.7× in Mar 2020 to 3.6× in Jan 2018.

The median for 10 specialty chemicals stocks of a similar size is 3.3×.

Price to book ratio over time

The dashed line is the 10-year median and the shaded band the middle half of its days.

Open the interactive chart, with overlays and comparisons

Year by year

YearEnd of yearLowHigh
2026 so far0.9×0.9×1.7×
20251.0×0.8×1.4×
20241.4×1.4×2.0×
20231.7×1.3×1.7×
20221.4×1.1×2.1×
20211.7×1.5×2.2×
20201.8×0.7×1.8×
20191.5×1.3×1.9×
20181.5×1.4×3.6×
20173.4×2.2×3.4×
20162.1×1.6×2.2×
20152.2×2.1×3.5×
20142.9×1.7×4.8×
20133.6×2.7×3.6×
20122.5×1.6×2.6×
20111.5×1.3×1.6×

Against its peers

Companies in Chemicals - Specialty nearest Westlake's size, closest first, today.

CompanyPrice to book ratio
WLKWestlake0.9×
NEUNewmarket4.4×
AXTAAxalta Coating Systems2.9×
CLXClorox116×
SXTSensient Technologies4.5×
RPMRPM International3.6×
LYBLyondellBasell Industries2.0×
IFFInternational Flavors & Fragrances1.7×
PPGPPG Industries2.9×
REXREX AMERICAN RESOURCES2.0×
APDAir Products and Chemicals4.9×
Peer median3.3×

What the price to book ratio tells you

Market value divided by the accounting value of the company's net assets. Below 1 means the market values the business at less than what it owns on paper.

Book value misses brands, software and people, so asset-light companies always look expensive on it. Most useful for banks and industrials.

More on Westlake

Valuation data, not investment advice. Prices as of . Reported figures come from the company's filings with the SEC.