Shares tumbled around 15% during pre-market activity Thursday following a report that exceeded expectations on both revenue and earnings metrics. Western Digital Corporation, WDCHeading into the earnings release, shares had already surged 201% throughout 2026. The company reported adjusted earnings per share of $3.56, comfortably beating the analyst consensus of $3.31. The forward guidance suggested a deceleration in sequential improvements across key financial metrics including revenue, profitability margins, and bottom-line performance. Additional Market DynamicsDuring regular trading hours before the earnings announcement, shares had already declined 5.4%, suggesting mounting investor caution ahead of the results.