Nvidia board member Mark Stevens has disclosed nearly $946.6 million in stock sales since late August, including about $300.15 million on September 18. The latest sale involved 1.366 million shares, mostly sold at a weighted-average price of $219.72. Stevens still holds significant Nvidia exposure through direct ownership, the Envy Trust and the Third Millennium Trust. Nvidia shares were around $227.80 in Wednesday’s premarket, near their 52-week high, and showed little immediate reaction. SEC filings provide transaction details but no explanation for the disposals.