Amphastar Pharmaceuticals Inc vs Advanced Drainage Systems Inc — how do they compare? Amphastar Pharmaceuticals Inc trades at $18.74 (market cap $826.08M), while Advanced Drainage Systems Inc trades at $149.8 (market cap $11.53B). The key difference: Advanced Drainage Systems Inc is far larger — about 14× Amphastar Pharmaceuticals Inc's market cap, and Advanced Drainage Systems Inc pays a 0.53% dividend while Amphastar Pharmaceuticals Inc pays none. Which is the better fit depends on your goals.
| AMPH | WMS | |
|---|---|---|
Market Cap | $826.08M | $11.53B |
Sector | Health | Industrials |
52-Week High | $30.81 | $175.38 |
52-Week Low | $16.87 | $110.89 |
Enterprise Value | $1.22B | $13.10B |
Dividend Yield | — | 0.53% |
Signals from Pluang's Aura AI — not financial advice
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.
Advanced Drainage Systems (WMS) trades at $150.47, up 1.77% today, with a bullish technical signal and strong fundamental profitability. Recent quarters show consistent earnings beats, with Q1 2026 EPS of $1.07 exceeding the $0.936 estimate. The company maintains robust margins, including a 38.27% gross profit margin and 13.98% net income margin, while cash flow trends indicate solid operational performance despite a net outflow in 2025.
The outlook is positive with a consensus price target of $183.33, suggesting 22% upside, supported by analyst buy ratings. Risks include competitive pressures and a recent Zacks Strong Sell rating, but strong ROE of 24.02% and debt-to-asset improvement to 34.34% in 2025 highlight financial health. Investors should weigh growth potential against market volatility and execution risks.
Trailing returns across standard periods
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 →Advanced Drainage Systems Inc is engaged in designing, manufacturing, and marketing thermoplastic corrugated pipe and related water management products in North and South America, and Europe. The company's operating segment includes Pipe
Read more on WMS →