Arm Holdings plc vs Iron Mountain Inc — how do they compare? Arm Holdings plc trades at $268.89 (market cap $286.06B), while Iron Mountain Inc trades at $122.75 (market cap $36.19B). The key difference: Arm Holdings plc is far larger — about 7.9× Iron Mountain Inc's market cap, and Iron Mountain Inc pays a 2.84% dividend while Arm Holdings plc pays none. Which is the better fit depends on your goals.
| ARM | IRM | |
|---|---|---|
Market Cap | $286.06B | $36.19B |
Sector | Technology | Real Estate |
52-Week High | $439.46 | $133.06 |
52-Week Low | $104.55 | $78.86 |
Enterprise Value | $282.64B | $55.60B |
Dividend Yield | — | 2.84% |
Signals from Pluang's Aura AI — not financial advice
ARM stock trades at $282.57, down 1.43% over 24 hours, with a bullish technical outlook supported by moving averages and key support at $272. The company reported strong earnings beats in recent quarters, with Q2 2026 EPS of $0.45 beating the $0.40 estimate. Revenue grew to $4.01B in 2025, with a net income margin of 20.25%, though valuation multiples remain elevated with a P/E of 273.32.
The outlook is positive due to AI-driven growth in licensing and royalties, with management targeting $25B revenue by FY31. However, risks include stretched valuation, smartphone market headwinds, and execution challenges. Analyst consensus is bullish with a $329.80 price target, suggesting 17% upside from current levels.
Iron Mountain (IRM) trades at $121.15, down 0.66% on the day, amid a bearish technical signal. The company reported strong Q2 2026 results with revenue up 19% year-over-year to $2.03 billion, beating estimates, and has a consensus analyst price target of $141.50. However, high debt levels and a negative shareholder equity position present fundamental concerns.
Outlook is mixed: robust data center and digital growth support upside, but elevated valuation ratios and rising debt-to-asset ratios pose risks. Analyst sentiment is predominantly buy-rated (65%), yet technical indicators suggest near-term caution. Investors should weigh strong operational performance against financial leverage and market volatility.
Trailing returns across standard periods
Latest headlines on both assets
Arm Holdings designs the architecture for high-performance, energy-efficient processors used in nearly all smartphones and millions of other devices. Its intellectual property powers global computing from mobile to AI.
Read more on ARM →Iron Mountain Inc is a record management services provider. The firm is organized as a REIT. Most of its revenue comes from its storage business, with the rest coming from value-added services. The firm primarily caters to enterprise clients in developed markets. Its business segments include Global RIM Business
Read more on IRM →