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Compare Amphastar Pharmaceuticals Inc (AMPH) vs Biogen Inc (BIIB) Price & Performance

Amphastar Pharmaceuticals Inc
Biogen Inc

Price performance

Price movement over the last 24 hours

Key statistics

Amphastar Pharmaceuticals Inc vs Biogen Inc — how do they compare? Amphastar Pharmaceuticals Inc trades at $18.72 (market cap $826.08M), while Biogen Inc trades at $203.64 (market cap $29.40B). The key difference: Biogen Inc is far larger — about 35.6× Amphastar Pharmaceuticals Inc's market cap, and Biogen Inc is trading nearer its 52-week high, Amphastar Pharmaceuticals Inc nearer its low. Which is the better fit depends on your goals.

AMPHBIIB
Market Cap
$826.08M$29.40B
Sector
HealthHealth
52-Week High
$30.81$216.63
52-Week Low
$16.87$122.68
Enterprise Value
$1.22B$31.68B

Aura AI Summary

Signals from Pluang's Aura AI — not financial advice

Amphastar Pharmaceuticals Inc

AMPH trades at $18.72, down 1.58% with bearish technical signals despite oversold RSI readings. The company reported mixed Q1 2026 results with EPS of $0.42 missing estimates of $0.70, continuing a trend of recent earnings disappointments. Valuation metrics appear reasonable with P/E of 11.29 and P/B of 1.07, while profitability remains solid with 47.34% gross margins. Recent news includes a Zacks Strong Sell rating and ongoing securities law investigation.

The stock faces near-term headwinds from earnings misses and negative analyst sentiment, though current valuations provide some downside protection. Upside potential exists if the company can execute its strategic pivot to proprietary drugs and biosimilars while managing BAQSIMI discount pressures. Key risks include ongoing legal scrutiny and competitive pressures in the generic drug market.

Biogen Inc

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.

Returns comparison

Trailing returns across standard periods

Top news

Latest headlines on both assets

About Amphastar Pharmaceuticals Inc

Amphastar is a specialty pharmaceutical company that develops and markets injectable, intranasal, and inhalation products. Its portfolio includes both complex generic drugs and proprietary delivery systems.

Read more on AMPH

About Biogen Inc

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.

Read more on BIIB