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Most Shorted Highest short interest
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13F Activity

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Stocks

AI Stock Screener ALVIS
Short interest & flow
Most Shorted
Squeeze Risk
Largest Short Volume
Highest Off-Exchange Share
Ownership & fundamentals
Insider Sentiment
Largest Buybacks
Going-Concern Flags

Institutions

Filers & Rankings
Browse Filers
Top by AUM
Smart Money Index
Superinvestors
AUM Movers
Most-Held Stocks
Last Quarter's Movers
Overlap Matrix
Clone Backtest
Beneficial Ownership
13F Activity
13F Statistics
Latest Filings
13F Trends
Double-Down Report
Conviction Heat Map

Markets

Insider Trading
Funds & ETFs
Investment Advisers
Economic Data
Economic Calendar
FDA Calendar
Congress Net Worth
Congress Leaderboard

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Stocks
AMPH
8-K

8-K

Amphastar Pharmaceuticals, Inc. (AMPH)

8-K 2021-08-10 For: 2021-08-05

Added on April 10, 2026

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