NEW YORK, December 30, 2025, 7:00 PM ET — After-hours
Western Digital Corp shares fell about 2% in after-hours trading — the electronic session after the 4 p.m. ET close — last at $176.06, after swinging between $181.34 and $175.30 earlier in the day. About 6.0 million shares changed hands in the regular session; the Nasdaq-tracking Invesco QQQ Trust slipped about 0.2% and the S&P 500 ETF SPY dipped about 0.1%, while storage peer Seagate Technology fell about 0.4% and Micron Technology dropped about 0.6%.
The late-day softness comes after a breakout year for Western Digital, which has climbed about 303% in 2025 as investors piled into storage names tied to AI-driven data-center demand, Kiplinger wrote. 1
That matters now because sharp winners often see bigger swings into year-end, when funds rebalance and traders lock in gains. The next earnings season will also test whether AI infrastructure spending keeps translating into higher shipments and pricing for enterprise storage.
Western Digital sells data storage products used in computers and data centers. It completed the separation of its flash memory unit into Sandisk Corp on Feb. 21, 2025, an SEC filing showed. 2
The remaining company is closely tied to demand for hard-disk drives, including “nearline” drives that store large volumes of data in data centers at a low cost per terabyte. Hyperscalers — the biggest cloud firms — buy these drives at scale because they can be a cheaper way to store large amounts of information than many solid-state alternatives.
Barron’s highlighted Western Digital and Seagate as surprise AI winners on Monday, saying demand for the highest-capacity drives has jumped at data centers. “AI is fundamentally reshaping hard drive demand by elevating the economic value of data and data storage,” Seagate Chief Executive Dave Mosley told the publication. Western Digital declined to comment while in its pre-earnings quiet period, Barron’s reported. 3
The stock’s run has also sharpened the debate on how much of the upcycle is already reflected in valuations, leaving shares prone to pullbacks when the broader tech complex eases.
At current levels, Western Digital is about 7% below its 52-week high of $188.77, according to MarketWatch data. 4
Western Digital still faces a competitive field, from Seagate in hard drives to solid-state drive suppliers in flash storage — including Sandisk, now a separate company. Demand can also be cyclical, tied to data-center build-outs and PC shipments.
The next catalyst is the company’s quarterly update and outlook, where investors will focus on cloud demand signals, pricing, and gross margin trends. Any read-through on ordering patterns from large cloud customers could sway sentiment after the stock’s 2025 surge.
Western Digital has not announced a date for its next earnings release; Nasdaq’s earnings calendar lists Feb. 4, 2026 as an estimated report date. 5
Until then, Western Digital shares are likely to trade with the broader AI infrastructure theme as investors weigh 2026 data-center spending plans.
