Western Digital Corporation (NASDAQ: WDC) saw its shares climb sharply on Monday, reaching $746.23, a gain of $34.58 or 4.86% from the previous close. The move reflects heightened investor enthusiasm for AI-related storage plays, as the company finalizes the exchange of remaining Sandisk shares for WDC stock, a process expected to conclude on June 22.
The company's fiscal fourth-quarter revenue guidance sits at a midpoint of $3.65 billion, with non-GAAP gross margins targeted between 51% and 52% and non-GAAP EPS of $3.25. These figures have reinforced market confidence in the sustainability of pricing power within the hard disk drive (HDD) segment, particularly as AI workloads generate vast amounts of data requiring storage.
Market Reaction and Valuation
The single-day price increase added approximately $11.9 billion in paper equity value, based on the company's share count from April 23. That represents roughly 3.3 times the midpoint of management's fiscal Q4 revenue forecast, underscoring the premium investors are placing on scarcity rather than just revenue growth. Western Digital's market capitalization now stands near $257.2 billion, with a trailing price-to-earnings ratio of about 44.6x.
Every percentage point of gross margin translates to roughly $36.5 million in gross profit. With a 16% tax rate and approximately 385 million diluted shares, each margin point contributes about $0.08 to quarterly EPS, making margin trends a critical focus for investors tracking HDD pricing dynamics.
Industry Tailwinds
Customer demand is providing a strong backdrop. Reports indicate that Apple is considering raising product prices to offset higher memory and storage chip costs, a move that signals suppliers like Western Digital are in a position of pricing power. Additionally, Morgan Stanley analyst Erik Woodring recently raised his price target for WDC to $650 from $488, citing AI-fueled HDD demand growing at 40% to 50% annually, outpacing supply growth of 30% to 35%. The stock has already surpassed that target by about 14.8%.
Western Digital's fiscal third-quarter results provided further momentum. Revenue reached $3.34 billion, up 45% year-over-year, with non-GAAP gross margins of 50.5% and free cash flow of $978 million. CEO Irving Tan emphasized that "virtually every AI workload" generates data stored on HDDs, positioning the company as a key beneficiary of the AI infrastructure buildout.
Company Transformation
Following the February 2025 split, Sandisk's results are no longer consolidated into Western Digital's financials, making the company a more focused pure-play on AI storage. In the fiscal third quarter, cloud revenue accounted for 89% of total sales, and a May survey indicated that 87% of customers prioritize capacity expansion and total cost of ownership optimization. Chief Product Officer Ahmed Shihab noted, "AI is a data systems challenge, not just a compute challenge."
Risks and Outlook
Despite the bullish sentiment, the stock's elevated valuation leaves little room for error. If shares fall below the implied previous close of $711.65, Monday's gains could be erased. The stock trades at a P/E of 44.6x and sits above Morgan Stanley's $650 target, making it vulnerable to any easing of HDD shortages, delays in hyperscale buying, or softening pricing. The company's forward guidance also highlights risks from tariffs, supply chain disruptions, and customer concentration.
For now, the market is betting that the AI storage scarcity story is durable. The completion of the Sandisk exchange and the company's strong margin guidance suggest that Western Digital is well-positioned to capitalize on the ongoing demand for storage capacity driven by artificial intelligence.
