Arm Holdings plc vs Biogen Inc — how do they compare? Arm Holdings plc trades at $313.44 (market cap $345.41B), while Biogen Inc trades at $201 (market cap $29.40B). The key difference: Arm Holdings plc is far larger — about 11.7× Biogen Inc's market cap, and Biogen Inc is trading nearer its 52-week high, Arm Holdings plc nearer its low. Which is the better fit depends on your goals.
| ARM | BIIB | |
|---|---|---|
Market Cap | $345.41B | $29.40B |
Sector | Technology | Health |
52-Week High | $439.46 | $216.63 |
52-Week Low | $104.55 | $122.68 |
Enterprise Value | $342.26B | $31.68B |
Signals from Pluang's Aura AI — not financial advice
ARM Holdings trades at $323.39, down 1.37% over 24 hours, with a bullish technical outlook supported by moving averages and strong quarterly earnings beats. The company reported robust revenue growth to $4.01B in 2025, with net income of $792M, though valuation ratios like P/E of 380.46 reflect premium pricing. Recent news highlights ARM's role in AI infrastructure and data center expansion, driving investor optimism.
Outlook remains positive with analyst consensus favoring buy ratings (74.07%) and a $321.65 price target, but risks include high valuation sensitivity and competitive pressures in the semiconductor space. Upside potential hinges on continued AI-driven demand and execution of growth initiatives like the AGI CPU launch.
Biogen (BIIB) trades at $199.15, up 0.12% on the day, with a bullish technical signal from moving averages and RSI near oversold levels at 20.73. The company reported Q1 2026 EPS of $3.57, beating estimates of $3.05, continuing a trend of earnings surprises. Revenue for 2025 was $9.89B with a net income margin of 13.81%, while recent acquisitions like RayThera for up to $1B aim to bolster its immunology pipeline. Analyst consensus price target is $226.00, implying potential upside from current levels.
BIIB presents a mixed outlook with strong earnings momentum and strategic acquisitions offset by legacy drug sales declines and legal investigations. The stock's valuation at a P/E of 21.41 is reasonable relative to growth prospects, but investors face risks from pipeline execution and competitive pressures in biotech. Near-term catalysts include Alzheimer's data presentations at AAIC 2026 in July.
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 →Biogen and Idec merged in 2003, combining forces to market Biogen's multiple sclerosis drug Avonex and Idec's cancer drug Rituxan. Today, Rituxan and next-generation antibody Gazyva are marketed via a collaboration with Roche. Biogen also markets novel MS drugs Plegridy, Tysabri, Tecfidera, and Vumerity. In Japan, Biogen's MS portfolio is co-promoted by Eisai. Hemophilia therapies Eloctate and Alprolix (partnered with SOBI) were spun off as part of Bioverativ in 2017. Biogen has several drug candidates in phase 3 trials in neurology and neurodegenerative diseases and has launched Spinraza with partner Ionis. Aduhelm was approved as the firm's first Alzheimer's disease therapy in June 2021.
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