Premarket movers today: Lumentum, ServiceNow, SanDisk & more

Stocks active in premarket trading included Lumentum, ServiceNow and SanDisk, with each name moving for different, news-driven reasons: an Nvidia strategic investment for Lumentum, a secondary share sale tied to Western Digital for SanDisk, and deal- and outlook-related headlines around ServiceNow.

Lumentum saw a notable premarket uptick after reports that Nvidia would make a multi-billion dollar commitment — including a $2 billion investment and purchase agreements — to shore up optics capacity for AI data centers. Market coverage also suggested order books could remain filled through 2028 amid AI-related demand, reinforcing the bullish narrative and lifting trading interest ahead of the open.

SanDisk’s premarket weakness traced to plans by former parent Western Digital to sell a portion of its Sandisk stake via a discounted secondary offering; pricing and the prospect of incremental supply weighed on the stock and prompted short-term profit-taking among holders who had seen strong gains since the spin-off. Such sell-downs by large shareholders often create temporary liquidity and valuation headwinds.

ServiceNow’s moves reflected continuing market attention to potential strategic transactions and forward guidance dynamics; past episodes show the stock can react sharply to M&A chatter and quarterly outlooks, and traders positioned ahead of confirmed announcements can amplify intraday swings. Investors in enterprise software names remain sensitive to subscription growth and how AI spending flows into customer budgets.

Looking ahead, market participants and analysts caution that premarket volatility is often headline-driven and may reverse or moderate once regular-hours liquidity returns. For Lumentum, the Nvidia partnership improves the long-term demand story; for SanDisk, the immediate overhang of a secondary sale is the key risk; and for ServiceNow, confirmed corporate developments or stronger-than-expected financials would likely determine direction. Traders should watch official filings and volume patterns at the open for confirmation.