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Insider Cluster: who is buying their own company's stock

Insider Cluster: who is buying their own company's stock

Oct 21, 2026 Finance & Accounting
data analysis financial reporting form 4 insider trading stock market

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Insider Cluster: who is buying their own company's stock

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Company insiders (CEOs, CFOs, directors) have to report their stock trades to the SEC within two business days, in a form called Form 4. The data is public but painful to read, so I built a site that does it for me: insidercluster.net What it does Reads every Form 4 filed each weekday and keeps only real open-market buys and sells (no option exercises, grants or gifts) Flags cluster buying: 3+ different insiders buying the same stock within 30 days Scores each purchase by size, role (CEO/CFO vs...

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