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AI Stock Screener ALVIS Describe a screen in plain English — or filter by any metric across every US-listed stock. One free screen — no signup

Short interest & flow

Most Shorted Highest short interest
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Going-Concern Flags Companies disclosing going-concern doubt

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Overlap Matrix Compare filer portfolios side by side
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13F Activity

13F Statistics Aggregate filing statistics
Latest Filings Newest 13F submissions
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Double-Down Report Increased-conviction buys
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Markets

Insider Trading Corporate insider buys and sells
Funds & ETFs Registered funds and ETFs from Form NPORT-P
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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

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Stocks
ATRA
8-K

8-K

Atara Biotherapeutics, Inc. (ATRA)

8-K 2025-05-16 For: 2025-05-14

Added on April 11, 2026

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