Western Digital (WDC) shares climbed 5.9% in Friday's session, touching an intraday high of $468.19 before settling at $467.46 — a notable advance from the prior day's close of $441.57.

The move came alongside broad strength across memory and storage equities, with SK Hynix rising 7% and Seagate gaining 5%. Investors are increasingly confident that artificial intelligence infrastructure spending will support favorable pricing dynamics and profit growth across the industry. The storage sector has become a key beneficiary of the AI buildout because training and running large models requires vast datasets that must be retained and retrieved from data center storage, sustaining demand for both high-capacity hard drives and memory even as other hardware segments cycle.

Over the past six months, WDC has gained roughly 70%, though it remains well below its 52-week high of $799.87, set in June.

Strong Quarterly Results Underpin the Rally

Western Digital reported fiscal fourth-quarter results on August 5 that beat expectations across key metrics. Earnings came in at $3.56 per share, ahead of the analyst consensus of $3.31, while revenue reached $3.75 billion versus expectations of $3.70 billion — a 44% increase year over year.

Cloud-related sales dominated the quarter, accounting for roughly 89% of total revenue at $3.3 billion, up 43% annually. Demand was particularly strong for high-capacity nearline HDDs used in enterprise data centers. That mix illustrates how dependent WDC's earnings have become on hyperscaler and cloud provider capital expenditure: with nearly nine of every ten revenue dollars now coming from cloud customers, shifts in data center spending plans are a central variable for the company's outlook.

Non-GAAP gross margin expanded to 54.4%, operating margin reached 44.2%, and the company posted a return on equity of 48.15%.

For the first quarter of fiscal 2027, management guided to revenue of approximately $4.1 billion and earnings per share of $3.85 to $4.15, with non-GAAP gross margin forecast at 55% to 56%.

Pricing Power and Cost Efficiency in Focus

Pricing per terabyte rose in the high teens year over year, supported by multi-year customer contracts running through 2029 to 2031. Those long-dated agreements matter because they lock in demand visibility years ahead — a structural change from the historically cyclical, spot-driven HDD market — and reduce the sector's exposure to sudden price downturns. Cost per terabyte fell about 8% during the quarter, and the company is targeting an ongoing 10% annual cost reduction.

Western Digital is ramping production of next-generation ePMR drives with capacities up to 40TB and expects UltraSMR technology to account for roughly 60% of nearline shipments by the end of fiscal 2027. Capacity gains of this kind are central to the economics of HDD storage, as higher per-drive capacity spreads manufacturing costs across more terabytes for data center customers.

The company returned $3.1 billion to shareholders during fiscal 2026, including $1 billion in share repurchases and $54 million in dividends in the fourth quarter alone. The fiscal year ended with approximately $500 million in net cash on the balance sheet.

Analyst Views and Insider Selling

Analyst sentiment currently reflects a "Moderate Buy" consensus. Price targets vary widely, from Cantor Fitzgerald's $900 to JPMorgan's $650 and Susquehanna's $500, with an average of $534.56. The wide spread among targets reflects differing views on how durable AI-driven storage pricing will prove.

On the insider front, CEO Irving Tan sold 20,000 shares on August 11 for approximately $8.9 million. Combined insider sales in the previous quarter exceeded $10.4 million, with the transactions executed under pre-established Rule 10b5-1 trading plans — a mechanism that schedules trades in advance and is commonly used by executives for diversification and tax purposes.

Technically, the stock's 50-day moving average sits at $508.41 and its 200-day moving average at $445.56. WDC trades at 7.52 times forward sales, above the sector average of 3.05.

Zacks raised its fiscal 2027 EPS estimate by 7.5% to $20.03 and lifted its fiscal 2028 forecast by 7.6% to $34.74 over the past 60 days.