Insider Cluster Buying
When several different insiders at the same company buy its stock within a short window, often read as a stronger signal than a single buy.
What it is
Insider cluster buying is a pattern where multiple insiders, such as several executives and directors, purchase the company's stock around the same time, typically over days or a few weeks. The idea is that independent buying by several well-informed people is more meaningful than a single insider's trade. It is identified by grouping individual insider transaction filings by company and date.
Why it matters
A cluster of open-market insider buys can be a high-conviction signal because it is harder to dismiss as one person's personal financial decision. The pitfalls are that clusters can still be wrong, may follow a sharp price drop rather than predict a rise, and must be filtered to exclude routine grants, option exercises, and automatic plan purchases. It is a sentiment cue to investigate, never a guarantee.
How it's calculated
It is a pattern detected from insider transaction filings, not a single formula: count distinct insiders making open-market purchases at one company within a defined time window (for example, several buyers within 30 days).
How Quintarthai uses it
Clustered insider buying surfaces through Quinn's insider tracker built on Form 4 and SEDI data, with each transaction carrying a provenance receipt; explore the activity on a company's deep-analysis page.