Sifting through countless of stocks in the Electronic Equipment, Instruments & Components 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 Flex Ltd. or Plexus Corp. 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 Flex Ltd. and Plexus Corp. compare based on key financial metrics to determine which better meets your investment needs.

About Flex Ltd. and Plexus Corp.

Flex Ltd. provides technology innovation, supply chain, and manufacturing solutions to data center, communications, enterprise, consumer, automotive, industrial, healthcare, industrial, and power industries. The company operates through two segments, Flex Agility Solutions (FAS) and Flex Reliability Solutions (FRS). The FAS segment offers flexible supply and manufacturing system comprising communications, enterprise, and cloud solution, which includes data, edge, and communications infrastructure; lifestyle solution, including appliances, floorcare, smart living, HVAC, and power tools; and consumer devices, such as mobile and high velocity consumer devices. Its FRS segment provides complex ramps with specialized production models and critical environments, which comprise industrial solutions, including industrial devices, capital equipment, renewables, and critical and embedded power solutions; automotive solutions, such as compute platforms, power electronics, motion, and interface; and health solutions comprising medical devices, medical equipment, and drug delivery. It also offers various services, including design and engineering, such as product design and engineering resources that provide design services, product development, and systems integration services and solutions; supply chain comprising manufacturing, customization, procurement, logistics, and innovative supply chain solutions; manufacturing; and logistics and value-added fulfillment services, including warehousing and vendor managed inventory, omni-channel fulfillment, kitting, configuration, and postponement. It operates in the Americas, Asia, and Europe. The company was formerly known as Flextronics International Ltd. and changed its name to Flex Ltd. in September 2016. Flex Ltd. was founded in 1969 and is headquartered in Austin, Texas.

Plexus Corp. provides electronic manufacturing services in the United States, the Asia-Pacific, Europe, the Middle East, and Africa. The company offers design, develop, supply chain, new product introduction, and manufacturing solutions, as well as sustaining services. It serves the aerospace/defense, healthcare/life sciences, and industrial/commercial sectors. Plexus Corp. was founded in 1979 and is headquartered in Neenah, Wisconsin.

Latest Electronic Equipment, Instruments & Components and Flex Ltd., Plexus Corp. Stock News

As of May 1, 2026, Flex Ltd. had a $33.7 billion market capitalization, compared to the Electronic Equipment, Instruments & Components median of $797.8 million. Flex Ltd.’s stock is up 51.7% in 2026, up 0.3% in the previous five trading days and up 167.04% in the past year.

Currently, Flex Ltd.’s price-earnings ratio is 41.1. Flex Ltd.’s trailing 12-month revenue is $26.8 billion with a 3.2% net profit margin. Year-over-year quarterly sales growth most recently was 7.7%. Analysts expect adjusted earnings to reach $3.248 per share for the current fiscal year. Flex Ltd. does not currently pay a dividend.

As of May 1, 2026, Plexus Corp. had a $7.1 billion market cap, putting it in the 73rd percentile of all stocks. Plexus Corp.’s stock is up 80% in 2026, up 4.1% in the previous five trading days and up 116.12% in the past year.

Currently, Plexus Corp.’s price-earnings ratio is 41.1. Plexus Corp.’s trailing 12-month revenue is $4.1 billion with a 4.4% net profit margin. Year-over-year quarterly sales growth most recently was 9.6%. Analysts expect adjusted earnings to reach $8.125 per share for the current fiscal year. Plexus Corp. does not currently pay a dividend.

How We Compare Flex Ltd. and Plexus Corp. 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 Flex Ltd. and Plexus Corp.’s stock grades to see how they measure up against one another.

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Flex Ltd. and Plexus Corp. Growth Grades

Company	Ticker	Growth
Flex Ltd.	FLEX	C
Plexus Corp.	PLXS	D

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.

Flex Ltd. has a Growth Score of 43, which is Average. Plexus Corp. has a Growth Score of 30, which is Weak.

The Growth Stock Winner: No Clear Winner

Neither Flex Ltd. or Plexus Corp. has a high enough Growth 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 portfolios. It’s important to look at a wide range of financial metrics in order to determine if Flex Ltd. or Plexus Corp. is the better investment when it comes to sustainable growth.

Flex Ltd. and Plexus Corp.’s Quality Grades

Company	Ticker	Quality
Flex Ltd.	FLEX	B
Plexus Corp.	PLXS	B

Like the Value Grade, AAII’s A+ Investor Quality Grade comes from the percentile rank of key metrics. Specifically, the Quality Score is the percentile rank of the average of the percentile ranks 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 the F-Score.

The score is variable, meaning it can consider all eight measures or, should any of the eight measures not be valid, the remaining measures that are valid. To be assigned a Quality Score, stocks must have a valid (non-null) measure and corresponding ranking for at least four of the eight quality measures.

The Quality Score is used to assess the underlying “quality” of a particular stock. A higher-quality stock possesses traits associated with upside potential and reduced downside risk. Backtesting of the Quality Grade shows that stocks with higher grades, on average, outperformed stocks with lower grades over the period of 1998 through 2019.

Stocks receive better grades (higher scores) for having higher scores for the quality subcomponents and worse grades (lower scores) for lower scores for the subcomponents.

Flex Ltd. has a Quality Score of 66, which is Strong. Plexus Corp. has a Quality Score of 80, which is Strong.

The Quality Grade Winner: It’s a Tie!

Looking at the Quality Grade breakdown above, both Flex Ltd. and Plexus Corp. have a grade of B. For investors who focus solely on a company’s overall quality, you will need to conduct further research into both companies to see if they are a good fit for your portfolio. As a good rule of thumb, you should always analyze multiple factors based on a wide range of metrics before choosing a company to invest in.

Flex Ltd. and Plexus Corp.’s Momentum Grades

Company	Ticker	Momentum
Flex Ltd.	FLEX	A
Plexus Corp.	PLXS	A

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%.

Flex Ltd. has a Momentum Score of 91, which is Very Strong. Plexus Corp. has a Momentum Score of 88, which is Very Strong.

The Momentum Grade Winner: It’s a Tie!

Looking at the Momentum Grade breakdown above, both Flex Ltd. and Plexus Corp. have a grade of A. For those who focus solely on a company’s momentum, further research will need to be conducted into both companies to see if they fit your individual needs as an investor.

Other Flex Ltd. and Plexus Corp. Grades

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

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).

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.

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 Flex Ltd. and Plexus Corp. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Flex Ltd. or Plexus Corp. Stock?

Overall, Flex Ltd. stock has a Growth Score of 43, Momentum Score of 91 and Quality Score of 66.

Plexus Corp. stock has a Growth Score of 30, Momentum Score of 88 and Quality Score of 80.

Comparing Flex Ltd. and Plexus Corp.’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.