Insider Trading (Form 4)
What a company's own executives and directors are doing with their own shares — and which of those transactions actually signal anything.
Company insiders — executives, directors, and other officers — are required to file a Form 4 with the SEC within two business days of most transactions in their own company's stock. InsiderWolf's Insider Transactions table on every ticker page shows these filings directly.
Not every Form 4 is the same kind of signal. BUY and SELL are open-market transactions — a real cash purchase or sale, at the current market price, on the insider's own initiative. OTHER covers everything else Form 4 reports: stock gifts, option/RSU exercises and awards, and other non-open-market transfers. These don't reflect a buy or sell decision at the current market price, so InsiderWolf doesn't count them as a conviction signal the way an open-market BUY or SELL is.
| Type | What it is | Counted as a signal? |
|---|---|---|
| BUY | Open-market cash purchase, insider's own initiative | Yes — the strongest signal of the three |
| SELL | Open-market cash sale, insider's own initiative | Yes, but weaker — often routine (taxes, diversification) |
| OTHER | Gifts, option/RSU exercises and awards, non-open-market transfers | No — not a market-price buy/sell decision |
An open-market insider purchase is generally read as a stronger signal than a sale, for a simple structural reason: insiders sell for all kinds of routine, uninformative reasons (diversification, paying taxes on a vested award, buying a house), but they only ever buy on the open market — using their own money, with no requirement to do so — for one reason: they think the stock is going up. That asymmetry is why a cluster of open-market buying, especially from multiple insiders at once, tends to draw more attention than an individual sale.
- A single insider sale is usually not meaningful on its own — it's routine, and often scheduled in advance (a pre-arranged 10b5-1 trading plan) specifically to avoid any appearance of trading on inside information.
- Multiple different insiders buying independently, especially in a cluster, is generally read as a stronger signal than one single insider's transaction of any kind.
- Insiders can be wrong too — an open-market purchase is a vote of confidence, not a guarantee, and insiders have been early (or simply incorrect) plenty of times.