Filings for Oct 26, 2021 show insider purchases at 21 companies, adding up to roughly $29 million. At the top: XLO, $20 million bought, with Rock Springs Capital Master Fund LP as the largest buyer.
Four of the buys came from a CEO or CFO. Cluster buying (3+ insiders) is running at 46 companies this month. Each filing is linked below if you want to check the details yourself.