Insightful posts on insider activity and cluster research.

Seven USPTO trademark filings for unannounced drug names. Three House members buying the same stock over seven weeks. Twenty-eight active Phase 3 trials with readouts into 2027. Three unrelated corners of the federal filing system, all pointing the same way — here's what's real, what's noise, and what we deliberately score as zero.

Two congressional stock sales in February. A four-insider, $25.6 million sell cluster in April — CEO included, no plan trades. Two independent signals, no mechanism connecting them, both pointing the same way. A worked example, months later, with every date and dollar figure sourced.

On June 16, 2026, three Directors at Eastern Company all bought shares on the same day. The cluster scored 94. EML is up 34% as of early July 2026. Here's what the pattern looked like — and why the signal was worth paying attention to.

A single executive purchase is easy to explain away. Three or more insiders buying the same stock within five days is something else — and understanding why requires thinking about probability, independence, and what insiders actually know.

Understand how insider transaction filings work and why Form 4 can surface timely signals for active investors.

Learn the legal, public way to monitor insider buying and use disclosures to spot potential setups.

See how to distinguish routine insider selling from activity that may indicate shifting executive sentiment.

Discover why grouped insider filings — scored by seniority, velocity, and capital — can matter more than individual transactions.

A practical guide to the table dashboard, cluster detail pages, Short Radar, and the AI analysis feature.