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Insider Sentiment Where insiders are accumulating most
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Going-Concern Flags Companies disclosing going-concern doubt

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Filers & Rankings

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AUM Movers Biggest assets-under-management swings
Most-Held Stocks Stocks owned by the most filers
Last Quarter's Movers Notable position changes
Overlap Matrix Compare filer portfolios side by side
Clone Backtest Backtest a combined clone of several filers
Beneficial Ownership Recent 13D / 13G >5% stakes

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

Insider Trading Corporate insider buys and sells
Funds & ETFs Registered funds and ETFs from Form NPORT-P
Investment Advisers SEC-registered Form ADV firms
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FDA Calendar Upcoming FDA advisory-committee meetings
IPO Feed S-1 registrations turned into structured data
Congress Net Worth Richest members by disclosed net worth
Congress Leaderboard Members ranked by portfolio performance

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Short interest & flow

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

Ownership & fundamentals

Insider Sentiment Largest Buybacks Going-Concern Flags

Institutions 13F filings, portfolios & smart money

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 Insiders, funds, macro, IPOs & Congress

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

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Stocks
WTM
8-K

8-K

White Mountains Insurance Group Ltd (WTM)

8-K 2025-09-03 For: 2025-09-02

Added on April 04, 2026

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