Filings for Feb 8, 2021 show insider purchases at 27 companies, adding up to roughly $60.3 million. The biggest was LABP (Landos Biopharma, Inc.), where PERCEPTIVE ADVISORS LLC led about $50 million of buying.
Cluster buying (3+ insiders) is running at 60 companies this month. C-suite buying: seven companies. One buy doesn't make a thesis, but it's a good place to start digging.