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Stocks

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
Squeeze Risk Composite short-squeeze score
Largest Short Volume Daily short-volume leaders
Highest Off-Exchange Share Dark-pool / OTC volume leaders
Reporting Calendar When FINRA publishes short interest

Company intelligence

Earnings Call Transcripts Read recent calls and quarterly archives
Earnings Calendar Calls, transcripts & company events
Insider Sentiment Where insiders are accumulating most
Largest Buybacks Biggest share-repurchase programs
Going-Concern Flags Companies disclosing going-concern doubt

Institutions

Fund Letters Source-linked Verified investor letters connected to the public companies they discuss Free publisher directory

Discover institutions

Browse Filers All 13F institutional filers
Smart Money Index Top funds' highest-conviction basket
Superinvestors Famous value investors' portfolios
Top by AUM Largest filers by assets
Most-Held Stocks Stocks owned by the most filers

Portfolio activity

Quarterly Activity Top buys, sells, openings and exits
AUM Movers Biggest assets-under-management swings
Last Quarter's Movers Notable position changes
Double-Down Report Increased-conviction buys
Conviction Heat Map Crowded positions at a glance

Filings & analysis

Latest Filings Newest 13F submissions
13F Trends Sector and flow trends
13F Statistics Aggregate filing statistics
Overlap Matrix Compare filer portfolios side by side
Clone Backtest Backtest a combined clone of several filers
Beneficial Ownership Recent 13D / 13G >5% stakes

Markets

Index Composition & Rebalance 7 indexes Constituents and observed changes for seven major US indexes, with forecasts where methodology permits Free constituent lists

Funds & market activity

ETFs Prices, performance, allocation and holdings
Insider Trading Corporate insider buys and sells
Registered Funds Mutual funds and SEC series from Form NPORT-P
Investment Advisers SEC-registered Form ADV firms
IPO Feed S-1 registrations turned into structured data

Macro & catalysts

Economic Data Federal Reserve and macro indicators
Economic Calendar Upcoming macro data releases
FDA Calendar Upcoming FDA advisory-committee meetings
Congress Net Worth Richest members by disclosed net worth
Congress Leaderboard Members ranked by portfolio performance

Resources

Research Data-driven market research & single-stock theses
Blog Guides to filings & financials, plus tool comparisons
Announcements Product updates, new data & milestones

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Short interest & flow

Most Shorted Squeeze Risk Largest Short Volume Highest Off-Exchange Share Reporting Calendar

Company intelligence

Earnings Call Transcripts Earnings Calendar Insider Sentiment Largest Buybacks Going-Concern Flags

Institutions 13F filings, portfolios & smart money

Fund Letters Start here

Discover institutions

Browse Filers Smart Money Index Superinvestors Top by AUM Most-Held Stocks

Portfolio activity

Quarterly Activity AUM Movers Last Quarter's Movers Double-Down Report Conviction Heat Map

Filings & analysis

Latest Filings 13F Trends 13F Statistics Overlap Matrix Clone Backtest Beneficial Ownership

Markets Indexes, funds, macro & market events

Index Composition & Rebalance Start here

Funds & market activity

ETFs Insider Trading Registered Funds Investment Advisers IPO Feed

Macro & catalysts

Economic Data Economic Calendar FDA Calendar Congress Net Worth Congress Leaderboard

Resources Research, guides & product news

Research Blog Announcements

Docs Pricing Datasets

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Fund letter publisher

WESTFIELD CAPITAL MANAGEMENT CO LP

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Companies: 0
Coverage: Dates not stated

Letter archive

1Q25 Review & Outlook

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Product

Stock screener Investment research Earnings call transcripts Financial datasets Pricing Data for teams

Developers

Documentation MCP server REST API 13F holdings API GitHub ↗

Resources

Blog Comparisons Announcements Economic data Public trackers Research methodology

Company

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Stock screener Investment research Earnings call transcripts Financial datasets Pricing Data for teams

Developers +

Documentation MCP server REST API GitHub ↗

Resources +

Blog Comparisons Announcements Economic data Public trackers Research methodology

Company +

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Data APIs

Earnings Call Transcript API Insider Trading API Congressional Trading API Short Interest API Options Chain API Stock Index Constituents API Financial Statements API

Popular data

Financial data for ChatGPT & Claude Congress trades High-yield spread Core CPI Aaa bond yield Most shorted stocks Short interest dates Largest buybacks

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