Insider buyers were busy on Jan 18, 2023: 19 companies, $15.7 million in open-market purchases all told. ZYME topped the list with roughly $9.7 million, led by EcoR1 Capital, LLC.
C-suite buying: five companies. Cluster buying (3+ insiders) is running at 56 companies this month. One buy doesn't make a thesis, but it's a good place to start digging.