COO Buys $5.3M in Uber; Corvex Dumps Illumina

UBER President and COO Andrew Gordon MacDonald filed two open-market purchases in early September, disclosing that he bought a combined 70,000 shares for roughly $5.3 million at prices around $75 to $76. That is a discretionary bet on Uber at a time when the stock carries just 2.4% short interest as a percentage of free float, a sign short sellers are not pressing hard against it.

The bigger story from the same filing period sits at ILMN. Activist fund Corvex Management, which holds a board seat at Illumina, disclosed a series of open-market sales totalling over $44 million across three days in early September. Corvex sold at prices around $213 to $219 per share. Board-affiliated selling at that scale draws attention. Illumina's short interest stands at 4.7% of free float.

NMIH CEO Adam Pollitzer filed a $7.7 million open-market sale of 172,706 shares at $44.85, also reported in early September. NMI Holdings carries 4.0% short interest.

Separately, billionaire Carlos Slim filed cumulative sales of roughly $7.7 million in PBF Energy across two tranches, reducing his 10% stake in the refiner.

Note: the vendor insider data used here runs through 8 September 2026. US EDGAR Form 4 tables were unavailable in this session; treat these figures as the latest available, not necessarily real-time.