40 companies had insiders buying in open-market trades in filings dated Aug 20, 2021, about $23 million combined. The biggest was MORF (Morphic Holding, Inc.), where SPRINGER TIMOTHY A led about $4.2 million of buying.
C-suite buying: ten companies. Cluster buying (3+ insiders) is running at 124 companies this month. One buy doesn't make a thesis, but it's a good place to start digging.