Edited by Peter Hillerberg1 min readStories are generated from ORTEX data and reviewed by the ORTEX team. How we publish
The most striking cluster in recent filings centres on NVDA. Independent Director Mark Stevens filed seven sell transactions between August 31 and September 2, offloading roughly 1.85 million shares for a combined $411 million. The sheer volume across three consecutive days stands out. Note that vendor data covers this as a non-US filing format; the 10b5-1 plan status is not confirmed here, so the signal weight is uncertain.
ARGX CEO Timothy Van Hauwermeiren filed a $21 million sale on September 5, covering 20,000 shares traded on September 3. Two other argenx executives, the Chief Medical Officer and General Counsel, also filed smaller sales around the same period. Multiple C-suite members selling in the same week is worth watching, though argenx has been a strong performer and executive sales after stock gains are common.
At POST, Chairman Emeritus William Stiritz filed sales totalling roughly $32 million across September 1 to 2, reported on September 3.
The standout buy comes from UBER. President and COO Andrew MacDonald filed a combined $5.3 million open-market purchase on September 8, with trades executed on September 4. Discretionary COO buying at this size is a meaningful signal.
Note: US EDGAR Form 4 first-party tables were unavailable in this environment; data above comes from the vendor insider table, latest filing date September 8, 2026.
ORTEX Market Intelligence content is generated by AI from a snapshot of ORTEX's proprietary data and reviewed by the ORTEX team. Content is informational only and does not constitute investment advice.
