Seagate and Western Digital shares plummeted as investors worried about Toshiba’s plan to double hard disk drive production, threatening AI data-center market dynamics.
Seagate Technology Holdings (NASDAQ:STX) and Western Digital Corp (NASDAQ:WDC) saw sharp declines Friday after Nikkei reported Toshiba’s plan to invest ¥60 billion ($400 million) to double HDD production capacity by financial year 2027. Fool.com reported a 11.7% tumble for Western Digital through 1 p.m. ET, with Seagate down 10.21%.
Toshiba’s Expansion Targets AI-Driven Storage Demand
Toshiba’s strategy focuses on its Philippine factory to meet surging AI infrastructure needs, according to Nikkei Asia. This move could challenge the dominance of Seagate and Western Digital, which together hold 80% of the market. Nikkei reported that Toshiba currently holds just over 10% of that market based on capacity and has set a medium-term target of reaching 30%.
The expansion has sparked fears of oversupply, potentially eroding pricing power in a sector where tight supply has driven record profits. These statements reflect the companies’ strategies to maintain pricing discipline amid growing demand for AI storage solutions.
Toshiba’s plans have drawn skepticism from analysts. Source 3 mentions that Toshiba is dependent on external suppliers for key components such as storage media and read-write heads, which would need to scale production significantly to support the expansion. This dependency may limit the additional capacity that ultimately reaches the market, according to the analysis.
Market Reactions and Analyst Perspectives
Source 2 mentions that analysts questioned Toshiba’s ambitious schedule, citing the company’s smaller investment compared to U.S. rivals. For the fiscal year 2027, which ends in June 2027 for Seagate and Western Digital, analysts at the two U.S. groups expect combined investments of $1.7 billion, while the $380 million from Japan are unlikely to even triple its own market share.
The stock declines followed significant gains this year, making the companies vulnerable to profit-taking. Seagate’s shares rose roughly 240% this year, while Western Digital gained about 170%, according to source 1. This rally has left them exposed to any signs of increased competition. Source 4 highlights that both companies beat earnings estimates in every quarter of fiscal 2026, shifting the focus of the selloff to future supply dynamics.
Long-Term Implications for the HDD Sector
Western Digital’s guidance for fiscal Q1 2027 revenue of $4.1 billion, plus or minus $100 million, reflects confidence in its current position. However, the company’s reliance on long-term contracts and allocated capacity through 2027 may offer some protection against Toshiba’s new supply. Source 2 mentions that long-term contracts help firms like Western Digital and Seagate secure pricing conditions and demand clarity. These agreements could mitigate immediate price pressures from Toshiba’s expansion.
Seagate’s focus on pricing discipline has been a key factor in its success. However, the market’s reaction to Toshiba’s plans suggests investors are concerned about the long-term sustainability of these pricing strategies. Source 5 notes that Western Digital’s projected 68% annual earnings growth rate could be at risk if Toshiba’s expansion leads to price competition.
The selloff in Seagate and Western Digital also reflects broader market dynamics. Source 4 states that large-cap tech stocks like the Invesco QQQ Trust (QQQ) rose 1.17% to $750.73, indicating that the broader technology sector is trading stronger. This contrast highlights the specific vulnerabilities of HDD-focused companies. Source 2 adds that the memory sector, including firms like SanDisk, experienced smaller declines, with SanDisk down 3.79% to $1,719.99. This suggests that the market differentiates between HDD and memory storage players.
Source 2 notes that the investment plans are still unconfirmed,
and the timeline for new capacity to reach cloud buyers is uncertain. This uncertainty may temper immediate market fears, but the potential for increased competition is a lingering concern. Analysts like Jordan Klein of Mizuho have expressed doubts about the feasibility of Toshiba’s timeline, citing the need for significant supplier coordination.
The current HDD market is dominated by three companies, alongside Seagate and Western Digital. Source 3 states that Toshiba’s market share is slightly above 10% based on capacity, with a target of 30%. This expansion could reshape the market, but the scale of investment and execution risks remain critical factors. Source 5 emphasizes that Western Digital and Seagate’s combined market share makes them resilient, but Toshiba’s entry could disrupt the balance. The outcome will depend on how quickly Toshiba can scale production and how effectively Seagate and Western Digital can maintain their pricing power.