Westlake Corp. (WLK) intrinsic value & 10-year financials

Westlake Corp. (WLK) has a Graham intrinsic value of $154.12 per share. At $63.33 on Oct 17, 2026, the stock trades 59% below that value. Over the last 10 fiscal years revenue grew 57.1% a year to $11.2B, with an average return on invested capital of 8.8%.

Graham intrinsic value
$154.12
Share price (Oct 17, 2026)
$63.33
Price vs Graham value
59% below
Market cap
$8.1B
Revenue (FY2025)
$11.2B
Revenue growth (10-yr CAGR)
57.1%
ROIC (10-yr avg)
8.8%
Free cash flow (FY2025)
-$530.0M

WLK 10-year financial history

Fiscal year Revenue Net income EPS (diluted) Free cash flow Operating margin ROIC
FY2025 $11.2B -$1.5B -$11.70 -$530.0M -14.1% -11.5%
FY2024 $12.1B $602.0M $4.64 $306.0M 7.2% 4.7%
FY2023 $12.5B $479.0M $3.70 $1.3B 5.8% 4.2%
FY2022 $15.8B $2.2B $17.34 $2.3B 19.3% 19.1%
FY2021 $11.8B $2.0B $15.58 $1.7B 23.8% 21.1%
FY2020 $7.5B $330.0M $2.56 $772.0M 5.7% 4.9%
FY2019 $8.1B $421.0M $3.25 $514.0M 8.1% 6.4%
FY2018 $8.6B $996.0M $7.62 $707.0M 16.3% 14.7%
FY2017 $8.0B $1.3B $10.00 $961.0M 15.3% 17.7%
FY2016 $191.1M $398.9M $3.06 $205.4M 304.3% 6.4%

Source: annual 10-K filings on SEC EDGAR. Figures in USD.

Executive summary

WESTLAKE CORP is a consistent compounder, expanding top-line revenue at 57.2% annually over the past decade.

WESTLAKE CORP returns on capital have been average, hovering around 8.8% ROIC over the decade.

WESTLAKE CORP has not shown aggressive share repurchases (>10% retirement) or a major balance-sheet leverage increase (>50% net debt growth) over the 10-year window.

Benjamin Graham lens

Under Benjamin Graham's formula using SEC EDGAR fundamentals, WESTLAKE CORP is modeled at 15.0% normalized earnings growth with a 5.1% bond-yield adjustment. The resulting Graham intrinsic value estimate is $154.12 per share.

WLK stock: frequently asked questions

What is the intrinsic value of Westlake Corp. (WLK) stock?

Using Benjamin Graham's revised formula, V = EPS × (8.5 + 2g) × 4.4 / Y, with reported diluted earnings per share, a 15.0% normalized growth rate (capped at 15%) and a 5.1% AAA corporate bond yield, WLK's intrinsic value is about $154.12 per share.

Is WLK stock undervalued?

At $63.33 (close on Oct 17, 2026), WLK trades 59% below its Graham value of $154.12. On Graham's terms that leaves a margin of safety. A formula is a starting point for research, not a recommendation.

How fast has Westlake Corp. grown?

Revenue went from $191.1M in fiscal 2016 to $11.2B in fiscal 2025, a compound annual growth rate of 57.1%. Net income was -$1.5B in fiscal 2025.

Does Westlake Corp. generate free cash flow?

Westlake Corp. generated -$530.0M of free cash flow (operating cash flow minus capital expenditures) in fiscal 2025. Free cash flow was positive in 9 of the last 10 reported years.

What is WLK's return on invested capital?

Average ROIC over the last 10 fiscal years was 8.8%, and average return on equity was 12.3%. Sustained ROIC above about 15% usually points to a durable competitive advantage.

Where does this WLK data come from?

From Westlake Corp.'s annual 10-K filings on SEC EDGAR. Prices are end-of-day snapshots; valuations are formula outputs, not investment advice.

Similar industrial organic chemicals stocks