Sifting through countless of stocks in the Semiconductors & Semiconductor Equipment 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 Diodes Incorporated or Synaptics Incorporated 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 Diodes Incorporated and Synaptics Incorporated compare based on key financial metrics to determine which better meets your investment needs.

About Diodes Incorporated and Synaptics Incorporated

Diodes Incorporated, together with its subsidiaries, provides semiconductor products in Asia, the Americas, and Europe. The company offers MOSFET and SiC MOSFET discrete semiconductor products; data line protection, power line protection, thyrister, USB Type-C protection, and transient voltage suppressor protection devices; Schottky diodes, small signal switching diodes, Zener diodes, and SiC diodes; and bridges, super barrier rectifiers, Schottky rectifiers, Schottky bridge rectifiers, and fast and ultra-fast rectifiers. It also provides avalanche transistors, gate driver transistors, and pre-bias transistors; power management devices, such as AC-DC and DC-DC converters, digital isolators and isolated gate drivers, USB power switches, low dropout, photocoupler, and linear voltage regulators; standard linear devices, such as operational amplifiers and comparators, current monitors, voltage references, and reset generators; LED lighting drivers; audio amplifiers; and sensor products, including Hall-effect sensors and motor drivers. In addition, the company offers mixed-signal products comprising high speed mux/demux, digital switches, interface, redrivers, universal level shifters/voltage translators, clock ICs, and packet switches; low-voltage complementary metal-oxide-semiconductor (CMOS) and CMOS devices, as well as ultra-low power CMOS logic and analog switches; and multichip products, co-packaged discrete, analog, and mixed-signal silicon in miniature packages. Further, it provides silicon and silicon epitaxial wafers; frequency control products; and contact image sensors. The company serves industrial, automotive, computing, consumer, and communications end-markets through direct sales, marketing personnel, independent sales representatives, and distributors. Diodes Incorporated was incorporated in 1959 and is headquartered in Plano, Texas.

Synaptics Incorporated develops, markets, and sells semiconductor products worldwide. The company provides edge AI processors, wireless connectivity, touch controllers, biometrics, voice, audio, and multimedia products for physical AI and robotics, edge AI, smart home, industrial and automotive, personal computers, and mobile applications, as well as modular development kits, open software frameworks, and optimized AI/ML toolchains. It also offers Wi-Fi, Bluetooth, Bluetooth Low Energy, Zigbee, Thread, Matter, global positioning system, global navigation satellite system, ultra-low energy solutions, human interface products, organic light-emitting diodes, multimedia SoCs, fax/modem/printer processors, video interface ICs, DisplayLink graphics, and display driver ICs (DDIC); Astra, an AI solution; and DisplayLink and DisplayPort to simplify connectivity to external displays. In addition, it provides Natural ID, a fingerprint ID product for notebook, personal computer peripherals, automobiles, and other applications, as well as integrated touch and display, local dimming, and driver sensing technologies. The company sells its products through direct sales, outside sales representatives, distributors, and value-added resellers. Synaptics Incorporated was incorporated in 1986 and is headquartered in San Jose, California.

Latest Semiconductors & Semiconductor Equipment and Diodes Incorporated, Synaptics Incorporated Stock News

As of September 2, 2026, Diodes Incorporated had a $4.1 billion market capitalization, compared to the Semiconductors & Semiconductor Equipment median of $4.7 million. Diodes Incorporated’s stock is up 82.9% in 2026, down 0.7% in the previous five trading days and up 69.23% in the past year.

Currently, Diodes Incorporated’s price-earnings ratio is 48.4. Diodes Incorporated’s trailing 12-month revenue is $1.6 billion with a 5.3% net profit margin. Year-over-year quarterly sales growth most recently was 21.7%. Analysts expect adjusted earnings to reach $3.225 per share for the current fiscal year. Diodes Incorporated does not currently pay a dividend.

As of September 2, 2026, Synaptics Incorporated had a $3.8 billion market cap, putting it in the 63rd percentile of all stocks. Synaptics Incorporated’s stock is up 32% in 2026, up 0.1% in the previous five trading days and up 41.16% in the past year.

Currently, Synaptics Incorporated does not have a price-earnings ratio. Synaptics Incorporated’s trailing 12-month revenue is $1.2 billion with a -41.0% net profit margin. Year-over-year quarterly sales growth most recently was 8.9%. Analysts expect adjusted earnings to reach $5.177 per share for the current fiscal year. Synaptics Incorporated does not currently pay a dividend.

How We Compare Diodes Incorporated and Synaptics Incorporated 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 Diodes Incorporated and Synaptics Incorporated’s stock grades to see how they measure up against one another.

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Diodes Incorporated and Synaptics Incorporated Stock Value Grades

Company	Ticker	Value
Diodes Incorporated	DIOD	D
Synaptics Incorporated	SYNA	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.

Diodes Incorporated has a Value Score of 24, which is Expensive. Synaptics Incorporated has a Value Score of 23, which is Expensive.

The Value Stock Winner: No Clear Winner

Neither Diodes Incorporated or Synaptics Incorporated 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 Diodes Incorporated or Synaptics Incorporated is the better investment when it comes to value.

Diodes Incorporated and Synaptics Incorporated Growth Grades

Company	Ticker	Growth
Diodes Incorporated	DIOD	C
Synaptics Incorporated	SYNA	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.

Diodes Incorporated has a Growth Score of 56, which is Average. Synaptics Incorporated has a Growth Score of 35, which is Weak.

The Growth Stock Winner: No Clear Winner

Neither Diodes Incorporated or Synaptics Incorporated 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 Diodes Incorporated or Synaptics Incorporated is the better investment when it comes to sustainable growth.

Diodes Incorporated and Synaptics Incorporated’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Diodes Incorporated	DIOD	A
Synaptics Incorporated	SYNA	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.

Diodes Incorporated has a Earnings Estimate Score of 93, which is Very Positive. Synaptics Incorporated has a Earnings Estimate Score of 47, which is Neutral.

The Earnings Estimate Revisions Grade Winner: Diodes Incorporated

As you can clearly see from the Earnings Estimate Revisions Grade breakdown above, Diodes Incorporated has a better Earnings Estimate Revisions Grade than Synaptics Incorporated. For those who are specifically looking for companies with better short-term prospects when compared to other companies in the same industry, Diodes Incorporated could be a good stock to invest in. However, it’s important to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other Diodes Incorporated and Synaptics Incorporated Grades

In addition to Growth, Estimate Revisions and Value, 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 Diodes Incorporated and Synaptics Incorporated pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Diodes Incorporated or Synaptics Incorporated Stock?

Overall, Diodes Incorporated stock has a Value Score of 24, Growth Score of 56 and Estimate Revisions Score of 93.

Synaptics Incorporated stock has a Value Score of 23, Growth Score of 35 and Estimate Revisions Score of 47.

Comparing Diodes Incorporated and Synaptics Incorporated’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.