Arm’s Data Center Shift May Be Underpriced Despite Smartphone Noise

Arm's first-quarter results delivered a clean beat, but the market's reaction framed it as a classic "buy the rumor, sell the news" setup. The company reported first quarter fiscal 2026 revenue of $1.053 billion, a 12% year-over-year jump that marked its best Q1 ever. This figure surpassed the midpoint of its own guidance, a solid print that should have been priced in.

The core driver was a powerful beat in the recurring royalty stream. Royalty revenue set a first-quarter record at $585 million, up 25% from the prior year. This surge, fueled by Armv9 and Compute Subsystem (CSS) adoption, is the real story. It shows the company's platform is gaining higher-value usage across smartphones, data centers, and edge devices. The stock's climb of about 8% Wednesday after the report suggests the beat was largely expected, with the upgrade from Susquehanna likely accelerating the move.

The real test now is whether this beat can sustain momentum. The guidance reset for the full year is a key variable, and the company faces persistent smartphone headwinds. The market has priced in the strong royalty growth, but the expectation gap will be determined by whether Arm can continue to outpace those headwinds and deliver on its promise of a data center revenue mix that could double.

The Structural Shift: Data Center's Growing Weight vs. Smartphone Headwinds

The market's focus on smartphone memory shortages may be missing the bigger picture. Arm's diversification is already well underway, and the structural shift in its revenue mix is what truly matters for long-term value. Data center revenue has already crossed into the teens as a percentage of total sales, and management expects it to reach parity with the smartphone segment within 2–3 years. This isn't just a growth story; it's a margin story. The data center and edge segments command structurally higher royalty rates than smartphones, meaning this shift is worth billions in incremental, higher-quality earnings.

Viewed through the lens of expectations, the market's reaction to smartphone headwinds looks overdone. The CFO quantified a worst-case 20% decline in smartphone unit volumes as a mere 1–2% hit to total royalties. That math suggests the memory shortage risk is being heavily priced in, even as the company's core royalty engine is being upgraded. The stock's 8% drop on February 4, 2026 after Q3 earnings, despite a beat, highlights a classic mispricing. The market fixated on the 1–2% royalty headwind while overlooking the data center line that, in the CFO's own words, "more than compensates" for all mobile-side risks.

The expectation gap here is about trajectory, not just the next quarter. The market is being asked to look past a temporary, quantified noise in one segment to see the powerful, structural expansion in another. If Arm can hit its target of data center parity with smartphones, it resets the entire growth and margin profile. For now, the stock price seems to be pricing in the smartphone risk while underestimating the magnitude of the data center inflection. The real story is the compounding royalty stream from higher-value platforms, which is already in the teens and accelerating.

Valuation and the Guidance Reset: Sandbagging or Sustainable Beat?

The market's verdict on Arm's growth trajectory is clear: analysts see significant upside, but the path to it hinges on management consistently beating the bar. The consensus rating is a "Moderate Buy" with an average price target of $160.81, implying about 32% upside from recent levels. This expectation gap is the core dynamic. The stock trades at a premium, but the model projects even higher returns. A long-term scenario from earlier this year suggests the stock could reach $203 by March 31, 2028, based on a 21% revenue CAGR and high margins. That's a 62% total gain over two years, a pace that would require Arm to not just meet but exceed its own ambitious growth targets.

Management's guidance reset for the fourth quarter of fiscal 2026 shows a pattern of outperformance. The company's forecast of $1.47 billion in revenue already beat the Street's $1.44 billion estimate. This isn't a one-off. It's part of a trend where Arm consistently prints above consensus, as seen in its record-breaking Q1. The question for investors is whether this is sustainable or a form of "sandbagging" where guidance is set just below expectations to ensure beats. The structural shift to data center, with its higher royalty rates, provides a durable foundation for this beat-and-raise cycle. The company's own CFO has stated that the data center line "more than compensates" for smartphone headwinds, a view that aligns with the guidance that continues to climb.

The valuation reflects this high-growth, high-margin story. Trading at a forward P/E of 64x, the stock is expensive, but that premium is justified by the business model's durability and the AI infrastructure positioning. The key risk is that the market's focus on near-term noise-like the quantified 1–2% royalty headwind from smartphone memory shortages-could overshadow the long-term compounding engine. If Arm continues to beat expectations, the stock could close the gap to its long-term price target. If it stumbles, the high multiple leaves little room for error. For now, the guidance reset suggests management is confident, and the analyst community is betting on more of the same.

Catalysts and Risks: What to Watch for the Next Expectation Gap

The setup is clear. Arm has consistently beaten expectations, and the market is now pricing in a powerful structural shift. The next test will be whether the company can accelerate that shift faster than the current premium reflects. Investors should watch for two key catalysts that will confirm or break the thesis.

First, monitor the execution of the 27% expected to be recognized as revenue in the coming 12 months. This pipeline of performance obligations, including the three new CSS deals, is the direct path to higher royalty rates. Each successful license conversion into a revenue-generating product is a beat in the making. The market has priced in the data center inflection, but the pace of that growth is the variable. If Arm can show accelerating recognition from this backlog, it will validate the premium and likely reset guidance higher again.

Second, keep a close eye on smartphone unit volume trends. The CFO's math is clear: a worst-case 20% decline in smartphone unit volumes translates to only a 1–2% hit to total royalties. Yet the stock's reaction to past smartphone news shows the market often overreacts to this noise. The next earnings report will be the true test. It must show that data center growth is not just keeping pace with, but is decisively outpacing, any smartphone weakness. If the data center mix continues to expand toward parity with smartphones, as management expects, that will prove the structural story is accelerating faster than priced in.

The bottom line is that Arm's stock is a bet on execution. The company has shown it can beat the whisper number. The next expectation gap will be determined by whether it can widen that gap by accelerating the high-margin, high-value growth story. Watch the license conversions and the data center mix. If those trends accelerate, the current valuation may look conservative. If they stall, the high multiple leaves little room for error.