Insider Trading (Legal)

When company executives buy or sell their own company's stock and report to the SEC.

What Is Legal Insider Trading?

Legal insider trading occurs when company executives, directors, or significant shareholders buy or sell their own company's stock and properly report these transactions to the SEC through Form 4 filings. Unlike illegal insider trading (which involves trading on material non-public information), legal insider trading is transparent and publicly tracked.

Why Insider Buying Is a Powerful Signal

There's an old Wall Street saying: "Insiders sell for many reasons, but they only buy for one." Executives might sell stock to diversify their portfolio, pay taxes, fund a home purchase, or simply because they have a planned selling schedule. But when they buy with their own money, it typically means they believe the stock is undervalued.

How to Track Insider Activity

All insider transactions are filed with the SEC on Form 4 and are publicly available. Key things to watch:

• Cluster buying: Multiple insiders buying at the same time is a stronger signal than one person buying.
• Size relative to compensation: A CEO buying $5M in stock when their salary is $1M is very different from buying $5M when they're worth $500M.
• Timing: Buying after a sharp sell-off is more meaningful than buying during a stock's rally.