An insider cluster buy is simple: three or more insiders buying the same stock in a short window. One executive buying could be loyalty theater. Three, including the CFO, starts to look like shared conviction.
Cluster buys are rare, which is exactly why they work as a filter. Out of thousands of weekly filings, only a small slice show multiple insiders buying together. Our own feed currently flags about 56 tickers with cluster-buy activity out of 9,060 recent insider transactions. Rarity is the feature, not a bug.
When you see one, check the roles. A CEO plus two independent directors is stronger than three junior officers. Then check price: are they buying near the 52-week low or chasing a run? Then check the filing dates, because tight clustering means they acted on the same information.
InsiderPulse flags cluster buys automatically and sends up to 5 alerts a month free. Unlimited alerts with push and SMS plus the full screener run $9/mo, and the $12/mo Pro tier adds congressional trades on top.
One cluster is a lead. Your research turns it into a thesis.