$AMPH
Amphastar Pharmaceuticals, Inc.
XNAS•Health Care•Pharmaceutical Preparations
Why is AMPH up today? It is at $22.01 (+0.59%), and our scanner flagged it 41 times on unusual volume this month. See the catalyst behind the move, real-time alerts the moment AMPH spikes, and full due diligence on AMPH — key stats, earnings, dilution and insider activity. Free.
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Key Stats
- Price
- $22.01
- Change today
- +0.59%
- Previous close
- $21.88
- 52-week range
- $16.64 – $31.26
- Market cap
- $936M
- Institutional own.
- 73.10%
- Total held
- 73.9%
- Tradeable float
- 11.1M 26% of shares · after <1% insiders + 73% institutions
- Short interest
- 5.4M ▲ +9% vs prior · as of 2026-08-14
- Short % of float
- 48.6%
- Days to cover
- 10.0d
- Avg daily volume
- 486K
- Sector
- Health Care
- Industry
- Pharmaceutical Preparations
- Exchange
- XNAS
- 5m
- 0.5x
- 15m
- 0.5x
- 1h
- 0.6x
- 1D
- --
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Why is $AMPH up today?
Here is the latest on AMPH from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for AMPH today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
Likely catalystAmphastar Pharmaceuticals, Inc.: Q2 FY2026 results, three months to Jun 30, 2026, from an SEC filing. Read it →Latest filing144Notice of proposed insider sale (144)Aug 18, 2026 · 11 days agoAnalyst data via Nasdaq. Not investment advice.
Insiders
Insiders buying7 buys, 3 sells last 3 months (12/31 over 12 months)Show 12 recent transactionsMinimize 12 recent transactions
| Insider | Action | Shares | % of position | Owns after | Value | Date |
|---|---|---|---|---|---|---|
Prins Richard K Director | Sold (automatic/other) | -8K 0.02% of company | sold 21% | 30K | $162K at $20.30 | Aug 11, 26 |
Peters William J Officer | Sold (automatic/other) | -8K 0.02% of company | sold 4.5% | 173K | $184K at $22.48 | Aug 7, 26 |
Peters William J Officer | Other | 5K 0.01% of company | added 2.9% | 181K | $100K at $19.79 | Aug 7, 26 |
Pierce Anthony T Director | Acquired (grant/award) | +8K 0.02% of company | n/a | 8K | n/a | Jul 9, 26 |
Lee Howard Director | Sold (automatic/other) | -769 | sold 0.5% | 159K | $14K at $18.45 | Jun 2, 26 |
Deflin Gayle Director | Acquired (grant/award) | +8K 0.02% of company | added 75% | 19K | n/a | Jun 1, 26 |
Gaugh David Russell Director | Acquired (grant/award) | +8K 0.02% of company | added 100% | 14K | n/a | Jun 1, 26 |
Gerst Diane G. Director | Acquired (grant/award) | +8K 0.02% of company | added 34% | 32K | n/a | Jun 1, 26 |
Zasloff Michael A Director | Acquired (grant/award) | +8K 0.02% of company | added 28% | 38K | n/a | Jun 1, 26 |
Lee Howard Director | Acquired (grant/award) | +8K 0.02% of company | added 5.4% | 160K | n/a | Jun 1, 26 |
Prins Richard K Director | Acquired (grant/award) | +8K 0.02% of company | added 28% | 38K | n/a | Jun 1, 26 |
Zhang Jack Y. Officer | Sold (automatic/other) | -10K 0.02% of company | sold 0.3% | 2.99M | $178K at $18.18 | Mar 15, 26 |
Recent Form-4 filings via Nasdaq. Open-market buys are the signal worth watching. Grants and automatic (10b5-1) sells are routine. “% of position” is the share of that insider’s own holding the trade moved. Not investment advice.
$AMPH Sentiment
BullishBlend of news sentiment, today’s move, and community votes. Not investment advice.
$AMPH Activity
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AMPH stock FAQ
Why is $AMPH up today?
Here is the latest on AMPH from our scanner (live price and day move above). We have not detected an unusual-volume catalyst for AMPH today, so it is trading in line with its recent range. The moment our scanner flags unusual activity, the reason will appear here.
What is the AMPH stock price today?
AMPH last traded at $22.01, up 0.59% on the day. The price and chart above update live during market hours (4 AM to 8 PM ET).
Where can I see live AMPH alerts?
The AMPH Live Alerts panel on this page streams real-time unusual volume (RVOL), momentum, halt and 200-EMA alerts from our scanner the moment they fire. Our scanner has flagged AMPH 41 times in the last 30 days.
What exchange is AMPH on?
AMPH (Amphastar Pharmaceuticals, Inc.) trades on XNAS, with a market cap of about $936M in the PHARMACEUTICAL PREPARATIONS sector.
Is AMPH good for day trading?
That depends on your strategy and risk. Day traders look for volume, volatility and a clear trend. Use the live chart, RVOL alerts and 200-EMA context on this page to judge AMPH for yourself. This is not investment advice.
Live data from TheDesperateTrader scanner. Not investment advice.