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 STMicroelectronics N.V. or ON Semiconductor Corporation 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 STMicroelectronics N.V. and ON Semiconductor Corporation compare based on key financial metrics to determine which better meets your investment needs.

About STMicroelectronics N.V. and ON Semiconductor Corporation

STMicroelectronics N.V., together with its subsidiaries, designs, develops, manufactures, and sells semiconductor products in Europe, the Middle East, Africa, the Americas, and the Asia Pacific. The company operates through Analog products, MEMS and Sensors Group (AM&S); Power and Discrete products (P&D); Embedded Processing (“EMP”); and RF Products (D&RF) segments. It offers industrial application-specific integrated circuits (ASICs) and application-specific standard products (ASSPs); power management solutions; custom analog ICs, wireless charging solutions; galvanic isolated gate and LED drivers; converters, transistors, intelligent power switches, clocks and timers, comparators, and current-sense amplifiers; micro-electro-mechanical systems (MEMS) sensors, including accelerometers, gyroscopes, magnetic sensors, pressure, temperature, presence detection, biosensors, machine learning, and edge AI processing smart sensors, as well as thermal and piezoelectric actuators; and optical sensing solutions. The company also provides silicon MOSFETs, SiC MOSFETs, IGBTs, thyristors, rectifiers, and power modules and bipolar transistors; microcontrollers, and automotive microcontrollers and secured; radio frequency (RF) communications and ASICs; car infotainment products; ultra-wide band and radar systems; and Connected Security Products; and automotive driver assistance systems. It serves automotive, industrial, personal electronics and communications equipment, and computers and peripherals markets. STMicroelectronics N.V. was incorporated in 1987 and is headquartered in Schiphol, the Netherlands.

ON Semiconductor Corporation provides intelligent sensing and power solutions in Hong Kong, Singapore, the United Kingdom, the United States, and internationally. It operates through three segments: Power Solutions Group, Analog and Mixed-Signal Group, and Intelligent Sensing Group. The Power Solutions Group segment offers discrete, module, and integrated semiconductor devices designed to enable power conversion, including power switching, signal conditioning, and circuit protection technologies. Its Analog and Mixed-Signal Group segment designs and develops analog and mixed-signal solutions, including power management, sensor interface, connectivity, and standard products for automotive, industrial automation, AI data centers, computing, and mobile end markets. The Intelligent Sensing Group segment develops complementary metal-oxide-semiconductor image sensors, image signal processors, short-wave infrared sensors, and other products, as well as photon-counting technologies, including single-photon avalanche diode arrays and silicon photomultiplier devices for depth sensing, factory automation, safety systems, and robotics industries. ON Semiconductor Corporation was incorporated in 1992 and is headquartered in Scottsdale, Arizona.

Latest Semiconductors & Semiconductor Equipment and STMicroelectronics N.V., ON Semiconductor Corporation Stock News

As of September 2, 2026, STMicroelectronics N.V. had a $45.2 billion market capitalization, compared to the Semiconductors & Semiconductor Equipment median of $4.7 million. STMicroelectronics N.V.’s stock is up 94.4% in 2026, down 1.8% in the previous five trading days and up 93.03% in the past year.

Currently, STMicroelectronics N.V.’s price-earnings ratio is 101.0. STMicroelectronics N.V.’s trailing 12-month revenue is $13.1 billion with a 3.6% net profit margin. Year-over-year quarterly sales growth most recently was 26.1%. Analysts expect adjusted earnings to reach $1.340 per share for the current fiscal year. STMicroelectronics N.V. currently has a 0.7% dividend yield.

As of September 2, 2026, ON Semiconductor Corporation had a $28.2 billion market cap, putting it in the 89th percentile of all stocks. ON Semiconductor Corporation’s stock is up 34.1% in 2026, down 2.9% in the previous five trading days and up 47.83% in the past year.

Currently, ON Semiconductor Corporation’s price-earnings ratio is 46.3. ON Semiconductor Corporation’s trailing 12-month revenue is $6.2 billion with a 10.2% net profit margin. Year-over-year quarterly sales growth most recently was 9.2%. Analysts expect adjusted earnings to reach $3.202 per share for the current fiscal year. ON Semiconductor Corporation does not currently pay a dividend.

How We Compare STMicroelectronics N.V. and ON Semiconductor Corporation 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 STMicroelectronics N.V. and ON Semiconductor Corporation’s stock grades to see how they measure up against one another.

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STMicroelectronics N.V. and ON Semiconductor Corporation Stock Value Grades

Company	Ticker	Value
STMicroelectronics N.V.	STM	D
ON Semiconductor Corporation	ON	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.

STMicroelectronics N.V. has a Value Score of 29, which is Expensive. ON Semiconductor Corporation has a Value Score of 29, which is Expensive.

The Value Stock Winner: No Clear Winner

Neither STMicroelectronics N.V. or ON Semiconductor Corporation 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 STMicroelectronics N.V. or ON Semiconductor Corporation is the better investment when it comes to value.

STMicroelectronics N.V. and ON Semiconductor Corporation Growth Grades

Company	Ticker	Growth
STMicroelectronics N.V.	STM	C
ON Semiconductor Corporation	ON	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.

STMicroelectronics N.V. has a Growth Score of 56, which is Average. ON Semiconductor Corporation has a Growth Score of 43, which is Average.

The Growth Stock Winner: No Clear Winner

Neither STMicroelectronics N.V. or ON Semiconductor Corporation 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 STMicroelectronics N.V. or ON Semiconductor Corporation is the better investment when it comes to sustainable growth.

STMicroelectronics N.V. and ON Semiconductor Corporation’s Momentum Grades

Company	Ticker	Momentum
STMicroelectronics N.V.	STM	A
ON Semiconductor Corporation	ON	B

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%.

STMicroelectronics N.V. has a Momentum Score of 86, which is Very Strong. ON Semiconductor Corporation has a Momentum Score of 69, which is Strong.

The Momentum Grade Winner: STMicroelectronics N.V.

As you can clearly see from the Momentum Grade breakdown above, STMicroelectronics N.V. is considered to have stronger momentum compared to ON Semiconductor Corporation. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, STMicroelectronics N.V. 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 STMicroelectronics N.V. and ON Semiconductor Corporation Grades

In addition to Momentum, Growth 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 STMicroelectronics N.V. and ON Semiconductor Corporation pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, STMicroelectronics N.V. or ON Semiconductor Corporation Stock?

Overall, STMicroelectronics N.V. stock has a Value Score of 29, Growth Score of 56 and Momentum Score of 86.

ON Semiconductor Corporation stock has a Value Score of 29, Growth Score of 43 and Momentum Score of 69.

Comparing STMicroelectronics N.V. and ON Semiconductor Corporation’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.