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 Micron Technology, Inc. or Arm Holdings plc 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 Micron Technology, Inc. and Arm Holdings plc compare based on key financial metrics to determine which better meets your investment needs.

About Micron Technology, Inc. and Arm Holdings plc

Micron Technology, Inc. designs, develops, manufactures, and sells memory and storage products in the United States, Taiwan, Japan, Mainland China, Hong Kong, Europe, and internationally. It operates through the Cloud Memory Business Unit; Core Data Center Business Unit; Mobile and Client Business Unit; and Automotive and Embedded Business Unit segments. The company provides memory products, including dynamic random access memory components and modules, CXL-based memory, LPDDR components and modules, graphics memory, high-bandwidth memory, and data center memory products; multichip packages (MCP) comprising embedded multimedia card-based, universal flash storage-based, and NAND-based MCPs; and technology leadership products that include 1y DRAM and G9 NAND technologies. It also offers storage products, such as data center solid-state drives (SSD), client SSD storage, and auto and industrial SSD storage; managed NAND; NAND flash; NOR flash; and memory cards. In addition, the company provides design tools, including FBGA and part decoders; DRAM power calculators; NAND power calculators; simulation models; chipset compatibility guides; serial presence-detection tools; cross-reference tools; UFSparm; SSD firmware; software and drivers; storage executive software; and obsolete part catalogs. It markets its semiconductor memory and storage products under the Micron and Crucial brands. The company serves the data center, PC, graphics, networking, automotive, industrial, and consumer embedded markets, as well as the smartphone and other mobile-device markets. It sells its products through its direct sales force, independent sales representatives, distributors, and retailers; web-based customer direct sales channel; and channel and distribution partners. Micron Technology, Inc. was founded in 1978 and is headquartered in Boise, Idaho.

Arm Holdings plc researches, develops, licenses, and markets central processing unit (CPU) intellectual property (IP), graphics processing unit IP, systems IP, compute subsystems (CSS), and associated software, tools and related services. The company provides a product portfolio, including CPU IP, GPU and neural processing unit (NPU) accelerators, system IP such as interconnects, compute platform products including pre-integrated CSSs, and development tools and software. The company serves semiconductor companies, original equipment manufacturers (OEMs), cloud service providers (CSPs), and organizations developing chips for end markets such as smartphones, consumer electronics, industrial IoT, embedded systems, cloud data centers, networking, automotive, and robotics. It provides its products and services in the United States, China, Japan, Taiwan, Korea, and internationally. The company was founded in 1990 and is based in Cambridge, United Kingdom. Arm Holdings plc operates as a subsidiary of SoftBank Group Corp.

Latest Semiconductors & Semiconductor Equipment and Micron Technology, Inc., Arm Holdings plc Stock News

As of September 18, 2026, Micron Technology, Inc. had a $1.1 trillion market capitalization, compared to the Semiconductors & Semiconductor Equipment median of $4.5 million. Micron Technology, Inc.’s stock is NA in 2026, NA in the previous five trading days and up 534.92% in the past year.

Currently, Micron Technology, Inc.’s price-earnings ratio is 22.9. Micron Technology, Inc.’s trailing 12-month revenue is $90.3 billion with a 55.9% net profit margin. Year-over-year quarterly sales growth most recently was 345.7%. Analysts expect adjusted earnings to reach $73.459 per share for the current fiscal year. Micron Technology, Inc. currently has a 0.1% dividend yield.

Currently, Arm Holdings plc’s price-earnings ratio is 281.4. Arm Holdings plc’s trailing 12-month revenue is $5.2 billion with a 20.2% net profit margin. Year-over-year quarterly sales growth most recently was 22.4%. Analysts expect adjusted earnings to reach $2.223 per share for the current fiscal year. Arm Holdings plc does not currently pay a dividend.

How We Compare Micron Technology, Inc. and Arm Holdings plc 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 Micron Technology, Inc. and Arm Holdings plc’s stock grades to see how they measure up against one another.

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Micron Technology, Inc. and Arm Holdings plc Growth Grades

Company	Ticker	Growth
Micron Technology, Inc.	MU	A
Arm Holdings plc	ARM	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.

Micron Technology, Inc. has a Growth Score of 83, which is Very Strong. Arm Holdings plc has a Growth Score of 59, which is Average.

The Growth Grade Winner: Micron Technology, Inc.

As you can clearly see from the Growth Grade breakdown above, Micron Technology, Inc. has a more attractive growth grade than Arm Holdings plc. For investors who focus solely on how a company is growing relative to other companies in the same industry, Micron Technology, 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.

Micron Technology, Inc. and Arm Holdings plc’s Momentum Grades

Company	Ticker	Momentum
Micron Technology, Inc.	MU	A
Arm Holdings plc	ARM	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%.

Micron Technology, Inc. has a Momentum Score of 98, which is Very Strong. Arm Holdings plc has a Momentum Score of 92, which is Very Strong.

The Momentum Grade Winner: It’s a Tie!

Looking at the Momentum Grade breakdown above, both Micron Technology, Inc. and Arm Holdings plc 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.

Micron Technology, Inc. and Arm Holdings plc’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Micron Technology, Inc.	MU	B
Arm Holdings plc	ARM	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.

Micron Technology, Inc. has a Earnings Estimate Score of 74, which is Positive. Arm Holdings plc has a Earnings Estimate Score of 50, which is Neutral.

The Earnings Estimate Revisions Grade Winner: Micron Technology, Inc.

As you can clearly see from the Earnings Estimate Revisions Grade breakdown above, Micron Technology, Inc. has a better Earnings Estimate Revisions Grade than Arm Holdings plc. For those who are specifically looking for companies with better short-term prospects when compared to other companies in the same industry, Micron Technology, Inc. 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 Micron Technology, Inc. and Arm Holdings plc Grades

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

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 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 Micron Technology, Inc. and Arm Holdings plc pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Micron Technology, Inc. or Arm Holdings plc Stock?

Overall, Micron Technology, Inc. stock has a Growth Score of 83, Momentum Score of 98 and Estimate Revisions Score of 74.

Arm Holdings plc stock has a Growth Score of 59, Momentum Score of 92 and Estimate Revisions Score of 50.

Comparing Micron Technology, Inc. and Arm Holdings plc’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.