Three insider stories stand out from filings covering the week of September 1–8.
Tutor Perini's chairman cashes out $197M. Ronald Tutor, Executive Chairman of TPC, filed on September 2 showing he sold 2.3 million shares on August 31 at roughly $85.57 each. The combined value: $197M. Directors also sold in August. TPC has a market cap of $4.4B, so these disposals are material. The significance score on these trades is low — suggesting they may be pre-planned — but the sheer scale warrants attention.
Gates keeps buying Republic Services. Filings dated September 1–3 show Bill Gates added another $66.8M in RSG shares across two days, paying around $222–$224 each. Gates is a long-standing major holder of the waste-management giant. This brings his recent buying to a notable cluster — a steady vote of confidence in a defensive, cash-generative business.
Astera Labs chairman offloads $47M. Manuel Alba-Marquez, Chairman of AI connectivity chip company ALAB, filed on September 3 disclosing sales of roughly 157,000 shares on September 1, totalling approximately $47M at around $280 per share. A second director, Stefan Dyckerhoff, added another $2.1M in sales the same week. Astera Labs carries a $62.5B market cap. Insider selling at this pace after a strong run in AI-related stocks is a signal worth watching.
This is not financial advice.
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