The past two weeks of insider filings reveal a clear split: most US insiders were selling, but one biotech chief kept buying aggressively.
The biggest buyer is SMMT Summit Therapeutics CEO Bob Duggan, who filed a $50M purchase of 3.8 million shares at $13.12 in mid-June. Duggan is already Summit's dominant shareholder. This is a repeat pattern — he has been adding to his stake through a period of clinical-stage volatility.
A quieter but persistent buying cluster appeared at AVO Mission Produce. A 10% venture capital owner and an independent director together filed over $30M in purchases between late June and this week. The buying spanned multiple dates, signaling conviction rather than a one-off entry.
John Malone filed three separate buys totalling nearly $10M in LILA Liberty Latin America shares across just four days in late June — a notable cluster from one of Wall Street's most-watched dealmakers.
On the sell side, PRM Perimeter Solutions was the loudest story. Hedge fund Windacre Partnership filed over $189M in combined sales last week — an unusually large disposal from a board-level shareholder. Applied Materials CEO Gary Dickerson filed $50M in sales across two days. Alibaba's President J. Michael Evans filed a $65.8M sale on July 1.
TTAN ServiceTitan saw venture backer Bessemer Venture Partners file two separate sell blocks totalling $32.8M since June 30.
This is not financial advice.
ORTEX Market Intelligence content is generated by AI from a snapshot of ORTEX's proprietary data. Content is informational only and does not constitute investment advice.
