Sifting through countless of stocks in the Chemicals industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in Westlake Corporation or LyondellBasell Industries N.V. because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how Westlake Corporation and LyondellBasell Industries N.V. compare based on key financial metrics to determine which better meets your investment needs.

About Westlake Corporation and LyondellBasell Industries N.V.

Westlake Corporation manufactures and markets performance and essential materials, and housing and infrastructure products in the United States, Canada, Germany, China, Mexico, Brazil, France, Italy, and internationally. It operates through two segments, Performance and Essential Materials and The Housing and Infrastructure Products. The Performance and Essential Materials segment offers ethylene, polyethylene, chlor-alkali, chlorinated derivative products, ethylene dichloride, vinyl chloride monomer, polyvinyl chloride (PVC), epoxy specialty resins, and base epoxy resins and intermediaries. The Housing and Infrastructure Products segment provides residential PVC sidings; PVC trim and mouldings; architectural stone veneers; windows; PVC decking; polymer composite and cement roof tiles; PVC pipes and fittings for various water, sewer, electrical, and industrial applications; and PVC compounds for various housing, medical, and automobile products. This segment also offers consumer and commercial products, such as landscape edging; industrial, home, and office matting; marine dock edging; and masonry joint controls. It offers its products to chemical processors; plastics fabricators; small construction contractors; municipalities; and supply warehouses for use in various consumer and industrial markets, including residential construction, flexible and rigid packaging, automotive products, healthcare products, water treatment, wind turbines, and coatings, as well as other durable and non-durable goods. The company was formerly known as Westlake Chemical Corporation and changed its name to Westlake Corporation in February 2022. Westlake Corporation was founded in 1986 and is headquartered in Houston, Texas. Westlake Corporation is a subsidiary of TTWF LP.

LyondellBasell Industries N.V. operates as a chemical company in the United States, Germany, China, Mexico, Italy, Japan, France, Poland, the Netherlands, and internationally. It operates in five segments: Olefins and Polyolefins—Americas; Olefins and Polyolefins—Europe, Asia, International; Intermediates and Derivatives; Advanced Polymer Solutions; and Technology. The company produces and markets olefins and co-products, such as ethylene, aromatics, propylene and butadiene; polyolefins; polyethylene; polypropylene homopolymers and copolymers; propylene oxide and derivatives; oxyfuels and related products; and intermediate chemicals, such as styrene monomer and acetyls. It also produces and markets compounding and solutions, including polypropylene compounds, engineered plastics, masterbatches, and engineered composites and colors. In addition, it develops and licenses chemical and polyolefin process technologies; and manufactures and sells polyolefin catalysts and serves food packaging, home furnishings, automotive components, and paints and coatings applications. LyondellBasell Industries N.V. was incorporated in 2009 and is headquartered in Rotterdam, the Netherlands.

Latest Chemicals and Westlake Corporation, LyondellBasell Industries N.V. Stock News

As of September 2, 2026, Westlake Corporation had a $9.7 billion market capitalization, compared to the Chemicals median of $4.2 million. Westlake Corporation’s stock is NA in 2026, NA in the previous five trading days and down 11.86% in the past year.

Currently, Westlake Corporation does not have a price-earnings ratio. Westlake Corporation’s trailing 12-month revenue is $11.3 billion with a -10.9% net profit margin. Year-over-year quarterly sales growth most recently was 10.8%. Analysts expect adjusted earnings to reach $3.225 per share for the current fiscal year. Westlake Corporation currently has a 2.8% dividend yield.

Currently, LyondellBasell Industries N.V. does not have a price-earnings ratio. LyondellBasell Industries N.V.’s trailing 12-month revenue is $31.2 billion with a -1.1% net profit margin. Year-over-year quarterly sales growth most recently was 19.8%. Analysts expect adjusted earnings to reach $9.305 per share for the current fiscal year. LyondellBasell Industries N.V. currently has a 4.1% dividend yield.

How We Compare Westlake Corporation and LyondellBasell Industries N.V. Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at Westlake Corporation and LyondellBasell Industries N.V.’s stock grades to see how they measure up against one another.

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Westlake Corporation and LyondellBasell Industries N.V. Stock Value Grades

Company	Ticker	Value
Westlake Corporation	WLK	C
LyondellBasell Industries N.V.	LYB	C

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection.

Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

AAII’s A+ Investor Value Grade derives from a stock’s value score. The Value Score is the percentile rank of the average of the percentile ranks of the price-to-sales ratio, price-earnings ratio, enterprise-value-to-EBITDA (EV/EBITDA) ratio, shareholder yield, price-to-book-value ratio and price-to-free-cash-flow ratio. The score is variable, meaning it can consider all six ratios or, should any of the six ratios not be valid, the remaining ratios that are valid. To be assigned a Value Score, stocks must have a valid (non-null) ratio and corresponding ranking for at least two of the six valuation ratios.

Stocks with a Value Score from 81 to 100 are considered deep value, those with a score between 61 and 80 are a good value and so on.

Westlake Corporation has a Value Score of 58, which is Average. LyondellBasell Industries N.V. has a Value Score of 59, which is Average.

The Value Stock Winner: No Clear Winner

Neither Westlake Corporation or LyondellBasell Industries N.V. has a high enough value grade to be considered a “winner.” Investors who are considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolio. It’s important to look at a wide range of financial metrics in order to determine if Westlake Corporation or LyondellBasell Industries N.V. is the better investment when it comes to value.

Westlake Corporation and LyondellBasell Industries N.V. Growth Grades

Company	Ticker	Growth
Westlake Corporation	WLK	B
LyondellBasell Industries N.V.	LYB	C

The foundation of growth investing is seeking out stocks of companies exhibiting strong, consistent and prolonged growth that is expected to continue into the future.

In order to compute the growth score and assign it a letter grade, the percentile ranks for each of three components‐consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations‐must be determined. These three rank figures are added together, and the sum is ranked against the entire stock universe to arrive at a company’s Growth Score to create an equal distribution of grades.

The companies in the bottom 20% of the stock universe receive Growth Grades of F, considered to be very weak, while those in the top 20% receive A grades, which are considered very strong.

Westlake Corporation has a Growth Score of 61, which is Strong. LyondellBasell Industries N.V. has a Growth Score of 56, which is Average.

The Growth Grade Winner: Westlake Corporation

As you can clearly see from the Growth Grade breakdown above, Westlake Corporation has a more attractive growth grade than LyondellBasell Industries N.V.. For investors who focus solely on how a company is growing relative to other companies in the same industry, Westlake Corporation could be a good stock to add to their portfolio. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Westlake Corporation and LyondellBasell Industries N.V.’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Westlake Corporation	WLK	D
LyondellBasell Industries N.V.	LYB	C

Earnings estimate revisions scores consider the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, positive surprises beget further positive surprises‐or at least continued sales growth (the exact opposite is generally true, too).

Estimate revisions offer an indication of what analysts are thinking about the short-term prospects of a firm. Estimate revisions are based on the statistical significance of a firm’s last two quarterly earnings surprises and the percentage change in its consensus estimate for the current fiscal year over the past month and past three months.

Westlake Corporation has a Earnings Estimate Score of 32, which is Negative. LyondellBasell Industries N.V. has a Earnings Estimate Score of 53, which is Neutral.

The Earnings Estimate Revisions Stock Winner: No Clear Winner

Neither Westlake Corporation or LyondellBasell Industries N.V. has an Earnings Estimate Revisions Grade that could be considered a “winner.” Investors considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if Westlake Corporation or LyondellBasell Industries N.V. is the better investment when it comes to estimate revisions.

Other Westlake Corporation and LyondellBasell Industries N.V. Grades

In addition to Value, Growth and Estimate Revisions, A+ Investor also provides grades for Momentum and Quality.

Momentum grades help uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming.

AAII’s A+ Investor Quality Grade comes from the ranking of key metrics. Specifically, the quality grade is the percentile rank of the composite of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and F-Score.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether Westlake Corporation and LyondellBasell Industries N.V. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Westlake Corporation or LyondellBasell Industries N.V. Stock?

Overall, Westlake Corporation stock has a Value Score of 58, Growth Score of 61 and Estimate Revisions Score of 32.

LyondellBasell Industries N.V. stock has a Value Score of 59, Growth Score of 56 and Estimate Revisions Score of 53.

Comparing Westlake Corporation and LyondellBasell Industries N.V.’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.