Filings for Mar 21, 2022 show insider purchases at 40 companies, adding up to roughly $22.6 million. The biggest was PCT (PureCycle Technologies, Inc.), where Fieler Jeffrey Richard led about $6 million of buying.
Cluster buying (3+ insiders) is running at 119 companies this month. C-suite buying: six companies. One buy doesn't make a thesis, but it's a good place to start digging.