26 companies had insiders buying on the open market in filings dated Jul 19, 2023, about $25.2 million combined. The biggest was SVRA (Savara Inc), where Yang Rick led about $10 million of buying.
C-suite buying: two companies. 46 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.