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SmartMoneyDB

Real-time insider trading signals and institutional investor tracking powered by SEC Form 4 and 13F filings.

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Main Features

Insider Signals
Stock Research
Fund Holdings
Sector Allocation
Research & Backtests
Top Managers

13F Data & Legal

Largest Trades (13F)
Activity (13F)
SEC EDGAR Source →
Data delayed up to 45 days from quarter end.

AI Analysis

Analyst Take

Major fund pages carry a quarterly AI-written analysis of the filing — key moves, concentration, sector tilts and how the clone portfolio has performed.

Not investment advice. Past holdings do not predict future returns.

Guy Spier 13F Holdings | Managing Partner Portfolio Q2 2026

Guy Spier

Managing Partner, Aquamarine Capital

ValueAUM $144.09MPositions 7Q2 2026

🏆 Clone Portfolio Track Record

Rank #34 of 69 by 3-year alpha vs SPY · mechanically replicating this book, rebalanced at filing dates

A strong clone record is a track record, not a forecast — tested across a decade it doesn't reliably repeat. See what actually holds up →

Guy Spier has run the Aquamarine Fund since 1997 in conscious imitation of the 1950s Buffett partnerships. Co-payer of the famous $650,100 Buffett charity lunch with Mohnish Pabrai, and author of 'The Education of a Value Investor'. Zurich-based, ultra-low turnover.