Filings for Sep 30, 2021 show insider purchases at 30 companies, adding up to roughly $14.9 million. MGNX topped the list with roughly $4.1 million, led by BB BIOTECH AG.
CEOs and CFOs show up 6 times in today's list. Cluster buying (3+ insiders) is running at 86 companies this month. One buy doesn't make a thesis, but it's a good place to start digging.