Scan 5,000+ stocks for SEC Form 4 insider buying clusters. CEOs, CFOs, and directors aggressively purchasing shares signal conviction. Each setup graded A+ to B.
Run this scan →Insider buying is one of the most powerful and legally transparent signals in the stock market. When corporate insiders — CEOs, CFOs, directors, and other executives — purchase shares of their own company on the open market, they are required to disclose these transactions via SEC Form 4 filings within two business days. Unlike insider selling (which can occur for many benign reasons like diversification or tax planning), insider buying is almost always driven by a single motivation: the insider believes the stock is undervalued.
The most significant insider buying signals occur when multiple insiders buy within a short window — what analysts call cluster buying. When a CEO, CFO, and two directors all purchase shares within the same two-week period, it suggests that the entire leadership team has conviction that the stock represents exceptional value at current prices. These insiders have access to non-public information about the company's pipeline, earnings trajectory, and strategic direction — while they cannot trade on material non-public information, their general knowledge of the business gives them a significant informational edge over outside investors.
Our scanner monitors SEC Form 4 filings across 5,000+ stocks and identifies cluster buying patterns. Each setup is scored based on the number of unique insiders buying, the total dollar amount of purchases, the role weight of buyers (C-suite purchases carry 3x the weight of director purchases), and the timing of purchases relative to price action. Insider buying during a pullback — when the stock is below its recent moving averages — scores higher because it suggests insiders are buying into weakness rather than chasing momentum.
The SEC began requiring insider transaction disclosure with the Securities Exchange Act of 1934, which established the legal framework for Form 4 filings. Academic research on insider buying as a predictive signal began in earnest in the 1960s, with landmark studies by Jaffe (1974) and Seyhun (1986) demonstrating that insider purchases consistently predicted positive abnormal returns. Nejat Seyhun's Investment Intelligence from Insider Trading (1998) provided the definitive academic treatment, showing that cluster buying by multiple insiders was the strongest signal. In modern markets, services like InsiderScore, WhaleWisdom, and the SEC's EDGAR database have made real-time Form 4 tracking accessible to all investors, transforming what was once an institutional edge into a widely followed signal.
Our scanner evaluates the following criteria when detecting Insider Buying Tracker setups across 5,000+ stocks daily.
For insider buying setups, an A+ grade means 3+ corporate insiders buying within a 14-day window, total purchases exceeding $1M, at least one C-suite buyer (CEO or CFO), and the stock in a pullback below its 20-day SMA. Lower grades indicate fewer insiders, smaller dollar amounts, or no C-suite participation. This is not a prediction of future price movement — it is a way to prioritize which charts deserve your attention first.
Buy when cluster insider buying is detected (2+ insiders within 14 days) and the stock shows technical stabilization — a higher low, a bounce off support, or a bullish candlestick pattern. Combine the insider signal with a technical entry rather than buying blindly on the filing date.
Place stop below the most recent swing low or 8-10% below entry, whichever is tighter. Insider buying signals a positive long-term outlook but does not guarantee the stock won't decline further in the short term.
Insider buying signals tend to play out over weeks to months, not days. The initial target is a return to the price level where insiders began buying (if buying during a pullback) or the prior swing high. Hold positions longer than typical swing trades — the informational edge insiders possess often takes time to be reflected in the stock price.
This is educational content only. Not financial advice. Always do your own research and manage risk appropriately.