23 companies had the people running the company buying in open-market trades in filings dated Apr 20, 2021, about $56.2 million combined. At the top: RXRX, $51.8 million bought, with Mamoura Diversified Global Holding PJSC as the largest buyer.
C-suite buying: nine companies. Cluster buying (3+ insiders) is running at 63 companies this month. One buy doesn't make a thesis, but it's a good place to start digging.