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Short interest & flow

Most Shorted Highest short interest
Squeeze Risk Composite short-squeeze score
Largest Short Volume Daily short-volume leaders
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Going-Concern Flags Companies disclosing going-concern doubt

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Filers & Rankings

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Top by AUM Largest filers by assets
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Clone Backtest Backtest a combined clone of several filers
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13F Activity

13F Statistics Aggregate filing statistics
Latest Filings Newest 13F submissions
13F Trends Sector and flow trends
Double-Down Report Increased-conviction buys
Conviction Heat Map Crowded positions at a glance

Markets

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FDA Calendar Upcoming FDA advisory-committee meetings
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Congress Leaderboard Members ranked by portfolio performance

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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

Stocks
AMPH
DEF 14A

DEF 14A

Amphastar Pharmaceuticals, Inc. (AMPH)

DEF 14A 2025-04-14 For: 2025-06-02

Added on June 12, 2026

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