40 companies had officers and board members buying on the open market in filings dated Dec 2, 2021, about $60.6 million combined. The biggest was CPNG (Coupang, Inc.), where MEHTA NEIL led about $16.6 million of buying.
C-suite buying: 13 companies. Cluster buying (3+ insiders) is running at 135 companies this month. One buy doesn't make a thesis, but it's a good place to start digging.