Guy Spier: 13F Holdings, Performance & Latest Position Changes | InsiderBuying.com

SpaceX~$1TSpaceX~$1T

InsiderBuying.com tracks every open-market stock purchase by corporate insiders — CEOs, CFOs, and directors — and scores each transaction with the Insider Quality Score (IQS). Follow the smart money, legally.

Market Data

Top Insider Scores
Insider Trades
Top Gainers
Congressional Trades
Stock Heatmap

Stock Lists

Penny Stocks
Large Cap
FAANG
Warren Buffett
All Stocks

Research

Intro to Insider Buying
Insider Access
For Business / API
Product Updates
Free Report
Contact Us

Data sources

SEC EDGAR
Federal Reserve
U.S. Treasury
Bank of Canada

© 2026 insiderbuying. All rights reserved.

Terms & Conditions Privacy Policy Cookie Settings Disclosures Disclaimer Corrections

Not investment advice. The Insider Score summarises publicly available SEC Form 4 filings and is provided for informational purposes only. Always conduct your own research and consult a licensed financial professional before making any investment decision.

Guy Spier: 13F Holdings, Performance & Latest Position Changes | InsiderBuying.com