Sifting through countless of stocks in the Life Sciences Tools & Services 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 West Pharmaceutical Services, Inc. or Mettler-Toledo International Inc. 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 West Pharmaceutical Services, Inc. and Mettler-Toledo International Inc. compare based on key financial metrics to determine which better meets your investment needs.

About West Pharmaceutical Services, Inc. and Mettler-Toledo International Inc.

West Pharmaceutical Services, Inc. designs, manufactures, and sells containment and delivery systems for injectable drugs and healthcare products in the Americas, Europe, the Middle East, Africa, and the Asia Pacific. It operates in two segments, Proprietary Products and Contract-Manufactured Products. The Proprietary Products segment offers stoppers and seals for injectable packaging systems; syringe and cartridge components, including custom solutions for the needs of injectable drug applications, as well as administration systems that enhance the safe delivery of drugs through advanced reconstitution, mixing, and transfer technologies; and films, coatings, washing, and vision inspection and sterilization processes and services to enhance the quality of packaging products. This segment also provides drug containment solutions in the form of vials, syringes, and cartridges; and self-injection devices; and a range of integrated solutions, including analytical lab services, pre-approval primary packaging support and engineering development, regulatory expertise, and after-sales technical support. This segment serves biologic, generic, and pharmaceutical drug companies. The Contract-Manufactured Products segment is involved in the design, manufacture, and automated assembly of devices used in surgical, diagnostic, ophthalmic, injectable, and other drug delivery systems, as well as consumer products. This segment primarily serves pharmaceutical, diagnostic, and medical device companies. It sells and distributes its products through its sales force and distribution network, contract sales agents, and regional distributors. West Pharmaceutical Services, Inc. was founded in 1923 and is headquartered in Exton, Pennsylvania.

Mettler-Toledo International Inc. manufactures and supplies precision instruments and services in the Americas, Europe, Asia, and internationally. It operates through five segments: U.S. Operations, Swiss Operations, Western European Operations, Chinese Operations, and Other Operations. The company offers laboratory instruments, such as laboratory balances, liquid pipetting solutions, real-time analytics, titrators, pH meters, process analytics sensors and analyzer technologies, density and refractometry instruments, and thermal analysis systems; and other analytical instruments, including UV/VIS spectrophotometers, moisture analyzers, and cell counters, as well as LabX, a laboratory software platform to manage and analyze data generated by its instruments and automate workflows. It also provides industrial instruments comprising industrial weighing instruments and related terminals, automatic dimensional measurement and data capture solutions, vehicle scale systems, industrial software, metal detectors, x-ray systems, checkweighers, and camera-based imaging equipment. In addition, the company offers retail weighing solutions consisting of weighing and software solutions, AI-driven image recognition solutions for fresh goods, and automated packaging and labeling solutions for the meat backroom. The company serves pharmaceutical and biotech companies, independent research organizations, and testing labs; food manufacturers and retailers; chemical, specialty chemicals, and cosmetics companies; transportation and logistics, metals, and electronics industries; and academic community through its direct sales force and indirect distribution channels. Mettler-Toledo International Inc. was incorporated in 1991 and is headquartered in Greifensee, Switzerland.

Latest Life Sciences Tools & Services and West Pharmaceutical Services, Inc., Mettler-Toledo International Inc. Stock News

As of September 1, 2026, West Pharmaceutical Services, Inc. had a $23.8 billion market capitalization, compared to the Life Sciences Tools & Services median of $2.9 million. West Pharmaceutical Services, Inc.’s stock is up 24.8% in 2026, down 1.9% in the previous five trading days and up 37.13% in the past year.

Currently, West Pharmaceutical Services, Inc.’s price-earnings ratio is 43.4. West Pharmaceutical Services, Inc.’s trailing 12-month revenue is $3.3 billion with a 17.0% net profit margin. Year-over-year quarterly sales growth most recently was 13.8%. Analysts expect adjusted earnings to reach $8.959 per share for the current fiscal year. West Pharmaceutical Services, Inc. currently has a 0.3% dividend yield.

As of September 1, 2026, Mettler-Toledo International Inc. had a $27.6 billion market cap, putting it in the 89th percentile of all stocks. Mettler-Toledo International Inc.’s stock is down 2.1% in 2026, down 2.4% in the previous five trading days and up 5.76% in the past year.

Currently, Mettler-Toledo International Inc.’s price-earnings ratio is 31.0. Mettler-Toledo International Inc.’s trailing 12-month revenue is $4.1 billion with a 21.9% net profit margin. Year-over-year quarterly sales growth most recently was 4.5%. Analysts expect adjusted earnings to reach $47.346 per share for the current fiscal year. Mettler-Toledo International Inc. does not currently pay a dividend.

How We Compare West Pharmaceutical Services, Inc. and Mettler-Toledo International Inc. 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 West Pharmaceutical Services, Inc. and Mettler-Toledo International Inc.’s stock grades to see how they measure up against one another.

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West Pharmaceutical Services, Inc. and Mettler-Toledo International Inc. Stock Value Grades

Company	Ticker	Value
West Pharmaceutical Services, Inc.	WST	F
Mettler-Toledo International Inc.	MTD	D

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.

West Pharmaceutical Services, Inc. has a Value Score of 12, which is Ultra Expensive. Mettler-Toledo International Inc. has a Value Score of 21, which is Expensive.

The Value Stock Winner: No Clear Winner

Neither West Pharmaceutical Services, Inc. or Mettler-Toledo International Inc. 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 West Pharmaceutical Services, Inc. or Mettler-Toledo International Inc. is the better investment when it comes to value.

West Pharmaceutical Services, Inc. and Mettler-Toledo International Inc. Growth Grades

Company	Ticker	Growth
West Pharmaceutical Services, Inc.	WST	A
Mettler-Toledo International Inc.	MTD	B

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.

West Pharmaceutical Services, Inc. has a Growth Score of 95, which is Very Strong. Mettler-Toledo International Inc. has a Growth Score of 73, which is Strong.

The Growth Grade Winner: West Pharmaceutical Services, Inc.

As you can clearly see from the Growth Grade breakdown above, West Pharmaceutical Services, Inc. has a more attractive growth grade than Mettler-Toledo International Inc.. For investors who focus solely on how a company is growing relative to other companies in the same industry, West Pharmaceutical Services, Inc. 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.

West Pharmaceutical Services, Inc. and Mettler-Toledo International Inc.’s Momentum Grades

Company	Ticker	Momentum
West Pharmaceutical Services, Inc.	WST	B
Mettler-Toledo International Inc.	MTD	C

Momentum grades help to 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. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

West Pharmaceutical Services, Inc. has a Momentum Score of 69, which is Strong. Mettler-Toledo International Inc. has a Momentum Score of 60, which is Average.

The Momentum Grade Winner: West Pharmaceutical Services, Inc.

As you can clearly see from the Momentum Grade breakdown above, West Pharmaceutical Services, Inc. is considered to have stronger momentum compared to Mettler-Toledo International Inc.. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, West Pharmaceutical Services, Inc. could be a good stock to invest in. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other West Pharmaceutical Services, Inc. and Mettler-Toledo International Inc. Grades

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

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

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 West Pharmaceutical Services, Inc. and Mettler-Toledo International Inc. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, West Pharmaceutical Services, Inc. or Mettler-Toledo International Inc. Stock?

Overall, West Pharmaceutical Services, Inc. stock has a Value Score of 12, Growth Score of 95 and Momentum Score of 69.

Mettler-Toledo International Inc. stock has a Value Score of 21, Growth Score of 73 and Momentum Score of 60.

Comparing West Pharmaceutical Services, Inc. and Mettler-Toledo International Inc.’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.