Insider buyers were busy on Feb 11, 2021: 36 companies, $228.2 million in open-market purchases all told. The biggest was IEA (Infrastructure & Energy Alternatives, In), where Ares Management GP LLC led about $213.2 million of buying.
11 of the buys came from a CEO or CFO. 62 companies had three or more insiders buying in the past 30 days. One buy doesn't make a thesis, but it's a good place to start digging.