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Compare Amphastar Pharmaceuticals Inc (AMPH) vs Plug Power Inc (PLUG) Price & Performance

Amphastar Pharmaceuticals Inc
Plug Power Inc

Price performance

Price movement over the last 24 hours

Key statistics

Amphastar Pharmaceuticals Inc vs Plug Power Inc — how do they compare? Amphastar Pharmaceuticals Inc trades at $18.72 (market cap $826.08M), while Plug Power Inc trades at $2.21 (market cap $3.11B). The key difference: Plug Power Inc is far larger — about 3.8× Amphastar Pharmaceuticals Inc's market cap, and Plug Power Inc is trading nearer its 52-week high, Amphastar Pharmaceuticals Inc nearer its low. Which is the better fit depends on your goals.

AMPHPLUG
Market Cap
$826.08M$3.11B
Sector
HealthIndustrials
52-Week High
$30.81$4.14
52-Week Low
$16.87$1.40
Enterprise Value
$1.22B$3.90B

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.

Plug Power Inc

PLUG trades at $2.23, down 6.3% on the day, with a bearish technical signal and negative cash flows. The company reported a net loss of $1.63 billion in 2025 despite revenue of $710 million, with gross profit margin at -25.66%. Recent news includes a 50MW electrolyzer order for the Hunter Valley Hydrogen Hub in Australia, but the stock faces pressure from analyst target cuts and high short interest of 27.4%.

Outlook remains challenged by persistent losses and cash burn, though analyst consensus suggests 31% upside to the $2.92 target. Key risks include delayed profitability targets beyond 2028 and reliance on financing amid negative operating cash flow. The stock's viability hinges on successful project execution and hydrogen market adoption.

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 Plug Power Inc

Plug Power is building an end-to-end green hydrogen ecosystem—from production, storage and delivery to energy generation. The company plans to build and operate green hydrogen highways across North America and Europe. Plug will deliver its green hydrogen solutions directly to its customers and through joint venture partners into multiple end markets—including material handling, e-mobility, power generation, and industrial applications.

Read more on PLUG