What is WLK's five-year median P/E?

9.4x. Half of WLK's weekly readings over the last five years were higher and half were lower. This page has 766 weekly readings, from Feb 20, 2012 to Oct 19, 2026.

Does a low historical rank mean a stock is a buy?

No. The rank compares WLK only with its own past. Slower growth or more risk can justify a lower multiple than before. P/E uses earnings and P/S uses revenue from the last twelve months.

Westlake Corp (WLK) P/E ratio history

Materials

$64.56

Latest weekly close · Market cap $8.3B

As of Oct 24, 2026

WLK has no P/E right now because its earnings over the last twelve months are negative.

No P/E chart for WLK right now

P/E needs positive earnings, so there is no current reading to compare with its history.

See WLK's P/S history

P/E

n/anot ranked

P/E needs positive earnings to be ranked.

Growth, last 12 months vs the year before

Revenue: -4%accelerating
EPS: n/a

Price vs revenue and EPS, indexed to 100

Each line starts at 100 at its first positive reading over the last five years. Revenue and EPS change at fiscal quarter ends.

PriceRevenue, last 12 monthsEPS, last 12 months100 = first reading

P/E at each year-end

The last weekly reading of each year, and its percentile against the five years before it.

WLK P/E at each year-end
Year-end	P/E	5-year percentile
Dec 29, 2025	n/a	Too little history
Dec 30, 2024	n/a	Too little history
Dec 25, 2023	15.0×	72
Dec 26, 2022	5.0×	7
Dec 27, 2021	8.5×	13
Dec 28, 2020	36.3×	99
Dec 30, 2019	18.6×	74
Dec 31, 2018	5.4×	2
Dec 25, 2017	23.2×	98
Dec 26, 2016	17.8×	92

Materials peers on P/E

Each percentile compares a stock with its own last five years.

Compare WLK with peers

Materials peers of WLK on P/E
Stock	P/E	Versus its own history	5-year percentile
DOWDow Inc.	n/a	Not ranked	n/a, not ranked
OLNOlin Corp	n/a	Not ranked	n/a, not ranked
AAAlcoa Corp	7.9×	Historically low	10
ALBAlbemarle Corporation	355.9×	Historically high	93
AMCRAmcor	19.5×	Within its usual range	45

Appears in

Sector: Materials
Themes: US Manufacturing Stocks Infrastructure Stocks
Screens: Stocks with Low P/E Ratios and Steady Revenue Growth
Stocks Below Their 5-Year Median P/E
Stocks Near Their Lowest P/E Ratios in 5 Years

Screen Materials stocks the same way

Research on WLK

No articles about WLK yet. How valuation percentiles work

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About this history

What is WLK's current P/E?: WLK has no P/E right now because its earnings over the last twelve months are negative.
What is WLK's five-year median P/E?: 9.4x. Half of WLK's weekly readings over the last five years were higher and half were lower. This page has 766 weekly readings, from Feb 20, 2012 to Oct 19, 2026.
Does a low historical rank mean a stock is a buy?: No. The rank compares WLK only with its own past. Slower growth or more risk can justify a lower multiple than before. P/E uses earnings and P/S uses revenue from the last twelve months.