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 Ambarella, Inc. or Tower Semiconductor Ltd. 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 Ambarella, Inc. and Tower Semiconductor Ltd. compare based on key financial metrics to determine which better meets your investment needs.

About Ambarella, Inc. and Tower Semiconductor Ltd.

Ambarella, Inc. develops low-power system-on-a-chip, semiconductors, and software for edge and physical artificial intelligence, applications, and intelligent automation. The company’s system-on-a-chip (SOC) integrates third generation CVflow technology with advanced video processing, image signal processing, audio processing, and system control functions on a single chip. It also offers central domain controllers, CVflow SoCs, AI neural processors, vision processor SoCs, high-definition radars, and serializer/deserializers, as well as licenses software modules. The company’s solutions are used in automotive video recorders, electronic mirrors, front advanced driver assistance system camera, AI Telematics Systems, and cabin monitoring system and driver monitoring system cameras in automotive field; central domain controllers for autonomous vehicles in autonomy; enterprise and public class, and home security cameras in the field of IoT; and enterprise, home, public spaces, and consumer applications, as well as for video conferencing, access control, healthcare, medical, and virtual reality applications. It sells its solutions to original design manufacturers, original equipment manufacturers, automotive market, and Tier-1 suppliers through its direct sales force and distributors. The company operates in Taiwan, rest of the Asia Pacific, Europe, the United States, and rest of North America. Ambarella, Inc. was incorporated in 2004 and is headquartered in Santa Clara, California.

Tower Semiconductor Ltd., an independent semiconductor foundry, provides technology, development, and process platforms for integrated circuits in the United States, Japan, rest of Asia, and Europe. The company provides customizable process technologies, including SiGe, SiPho, mixed signal CMOS, RF CMOS, CMOS image sensor, non-imaging sensors, wafers, and integrated power management. It also offers a design enablement platform for a design cycle, as well as transfer optimization and development process services to integrated device manufacturers and fabless companies. The company serves consumer applications, personal computers, communications, handsets and smartphones, automotive, industrial, aerospace, and medical devices. Tower Semiconductor Ltd. was incorporated in 1993 and is headquartered in Migdal Haemek, Israel

Latest Semiconductors & Semiconductor Equipment and Ambarella, Inc., Tower Semiconductor Ltd. Stock News

As of September 1, 2026, Ambarella, Inc. had a $3.0 billion market capitalization, compared to the Semiconductors & Semiconductor Equipment median of $4.6 million. Ambarella, Inc.’s stock is down 6.3% in 2026, down 4.7% in the previous five trading days and down 17.76% in the past year.

Currently, Ambarella, Inc. does not have a price-earnings ratio. Ambarella, Inc.’s trailing 12-month revenue is $405.2 million with a -17.2% net profit margin. Year-over-year quarterly sales growth most recently was 16.9%. Analysts expect adjusted earnings to reach $0.790 per share for the current fiscal year. Ambarella, Inc. does not currently pay a dividend.

As of September 1, 2026, Tower Semiconductor Ltd. had a $22.5 billion market cap, putting it in the 87th percentile of all stocks. Tower Semiconductor Ltd.’s stock is up 74.3% in 2026, down 7.5% in the previous five trading days and up 238.42% in the past year.

Currently, Tower Semiconductor Ltd.’s price-earnings ratio is 78.7. Tower Semiconductor Ltd.’s trailing 12-month revenue is $1.7 billion with a 16.9% net profit margin. Year-over-year quarterly sales growth most recently was 31.0%. Analysts expect adjusted earnings to reach $3.856 per share for the current fiscal year. Tower Semiconductor Ltd. does not currently pay a dividend.

How We Compare Ambarella, Inc. and Tower Semiconductor Ltd. 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 Ambarella, Inc. and Tower Semiconductor Ltd.’s stock grades to see how they measure up against one another.

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Ambarella, Inc. and Tower Semiconductor Ltd. Stock Value Grades

Company	Ticker	Value
Ambarella, Inc.	AMBA	F
Tower Semiconductor Ltd.	TSEM	F

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.

Ambarella, Inc. has a Value Score of 7, which is Ultra Expensive. Tower Semiconductor Ltd. has a Value Score of 5, which is Ultra Expensive.

The Value Stock Winner: No Clear Winner

Neither Ambarella, Inc. or Tower Semiconductor Ltd. 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 Ambarella, Inc. or Tower Semiconductor Ltd. is the better investment when it comes to value.

Ambarella, Inc. and Tower Semiconductor Ltd.’s Quality Grades

Company	Ticker	Quality
Ambarella, Inc.	AMBA	C
Tower Semiconductor Ltd.	TSEM	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.

Ambarella, Inc. has a Quality Score of 50, which is Average. Tower Semiconductor Ltd. has a Quality Score of 68, which is Strong.

The Quality Grade Winner: Tower Semiconductor Ltd.

As you can clearly see from the Quality Grade breakdown above, Tower Semiconductor Ltd. has a better overall quality grade than Ambarella, Inc.. For investors who are looking for companies with higher quality than others in the same industry, Tower Semiconductor Ltd. could be a good stock to add to their portfolios. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Ambarella, Inc. and Tower Semiconductor Ltd.’s Momentum Grades

Company	Ticker	Momentum
Ambarella, Inc.	AMBA	D
Tower Semiconductor Ltd.	TSEM	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%.

Ambarella, Inc. has a Momentum Score of 28, which is Weak. Tower Semiconductor Ltd. has a Momentum Score of 95, which is Very Strong.

The Momentum Grade Winner: Tower Semiconductor Ltd.

As you can clearly see from the Momentum Grade breakdown above, Tower Semiconductor Ltd. is considered to have stronger momentum compared to Ambarella, Inc.. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, Tower Semiconductor Ltd. 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 Ambarella, Inc. and Tower Semiconductor Ltd. Grades

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

Growth investing builds on the idea that stocks of companies exhibiting strong, consistent and prolonged growth outperform those of slower-growth companies. AAII measures growth through consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations.

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 Ambarella, Inc. and Tower Semiconductor Ltd. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Ambarella, Inc. or Tower Semiconductor Ltd. Stock?

Overall, Ambarella, Inc. stock has a Value Score of 7, Momentum Score of 28 and Quality Score of 50.

Tower Semiconductor Ltd. stock has a Value Score of 5, Momentum Score of 95 and Quality Score of 68.

Comparing Ambarella, Inc. and Tower Semiconductor Ltd.’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.