Here's what insiders bought in filings for Aug 16, 2022 — 40 companies and around $37.3 million in total. The biggest was TERN (Terns Pharmaceuticals, Inc.), where Vivo Capital Surplus Fund VIII, L.P. led about $14 million of buying.
11 of the buys came from a CEO or CFO. Cluster buying (3+ insiders) is running at 69 companies this month. One buy doesn't make a thesis, but it's a good place to start digging.