Insider Buying Signals: Recent Form 4 Purchase Activity

When corporate insiders — CEOs, CFOs, board members, and other executives with direct knowledge of the business — buy shares of their own company in the open market, investors pay attention. Unlike institutions that manage diversified portfolios, insiders buy for one reason: they believe the stock will go up.

Why Insider Buying Is a Meaningful Signal

Warren Buffett has long said he watches insider behavior closely. The academic research supports this intuition: studies consistently show that stocks with significant insider buying outperform the market over the following 6–12 months. The signal is particularly strong when:

• Multiple insiders buy simultaneously — consensus among executives suggests broad conviction
• Purchases are large relative to salary — a CEO spending $500K of personal money is more meaningful than a $10K token purchase
• Buying occurs after a stock decline — insiders buying at depressed prices signal they believe the selloff is overdone
• Purchases are in the open market — not exercises of pre-granted options, which carry less signal

Understanding Form 4 Filings

The SEC requires corporate insiders to report any purchase or sale of company stock within two business days using Form 4. Key transaction codes to know:

• P — Purchase: Open market buy. The strongest bullish signal.
• S — Sale: Open market sale. Less informative — insiders sell for many reasons (diversification, taxes, liquidity).
• A — Grant/Award: Shares awarded by the company (stock compensation). Not a discretionary purchase.
• M — Option Exercise: Converting options to shares. Often followed by a sale — not inherently bullish.

View insider trading activity for any individual stock on its profile page — for example, check AAPL insider trades or MSFT insider trades.

Recent Significant Insider Purchases

The data below is sourced from SEC EDGAR Form 4 filings and updated regularly. We highlight open-market purchases (transaction type P) as these represent the most meaningful insider conviction signal. Use our stock screener to filter for additional fundamental metrics on any of these companies.