Execs Buy, Andreessen Dumps $75M

Insiders made bold moves this week. The filings paint a mixed picture — one CEO going all-in while a tech heavyweight heads for the exit.

Summit Therapeutics CEO goes big. Bob Duggan, Chairman and CEO of SMMT, filed on June 12 that he bought $50M worth of shares at $13.12 each. He snapped up 3.81 million shares in a single day. That's not routine. The CFO and President also filed buys earlier in the month, adding over $1.8M combined. Three C-suite insiders buying in the same stock inside two weeks is a clear signal of internal confidence.

Andreessen exits Samsara. Marc Andreessen, Director at IOT, filed $75.6M in sales between June 8 and June 11. The filings hit regulators on June 10 and 12. He sold over 2.25 million shares across four transactions. No corresponding buys from other insiders have appeared.

Argan CEO sells near highs. David Watson, President and CEO of AGX, filed a $6.5M sale on June 16. The Chairman filed a separate $32M disposal the same day. That's over $38M in combined executive selling from one company in one week.

TJX Executive Chairman trims position. Carol Meyrowitz of TJX filed a $9.1M sale on June 10. She sold 55,624 shares at around $163 each.

The buying at Summit stands out most. CEO-led purchases of this size — well above $1M — are among the most reliable bullish signals in insider data.

This is not financial advice.