25 companies had company insiders buying on the open market in filings dated Sep 27, 2021, about $16.4 million combined. PLAG topped the list with roughly $3.4 million, led by Zhou Bin.
81 companies had three or more insiders buying in the past 30 days. Seven of the buys came from a CEO or CFO. One buy doesn't make a thesis, but it's a good place to start digging.