38 companies had the people running the company buying in open-market trades in filings dated Sep 8, 2025, about $51.4 million combined. MLYS topped the list with roughly $45 million, led by RA CAPITAL MANAGEMENT, L.P..
Cluster buying (3+ insiders) is running at 75 companies this month. CEOs and CFOs show up 9 times in today's list. One buy doesn't make a thesis, but it's a good place to start digging.