Western Digital Jumps 7%, Seagate Climbs 5% as Bernstein Calls Toshiba Selloff a Storm in a Teacup; SanDisk Inches Higher

A weekend of research notes is pulling hard disk drive (HDD) stocks out of a selloff tied to Toshiba. Both stocks are leading the rebound. Shares of Western Digital (NASDAQ:WDC | WDC Price Prediction) and Seagate Technology Holdings (NASDAQ:STX) climbed after three Wall Street firms argued that Toshiba’s added capacity lands in a market still short of drives. Goldman Sachs takes a more selective view, which complicates the recovery.

Western Digital stock is up 7% to $442.44, the strongest gain among the storage names. Meanwhile, Seagate stock is climbing 5% to $891.76, close behind its chief HDD rival. The rebound wins back part of the ground Western Digital and Seagate stock gave up after the Toshiba headline.

SanDisk (NASDAQ:SNDK) shares are inching up 0.6%, a far quieter move for the flash storage maker. At the same time, the Invesco QQQ Trust (NASDAQ:QQQ) is up 0.3%, leaving Western Digital and Seagate stock well ahead of large-cap tech.

Three Research Desks Push Back on Toshiba Fears

Shares of Western Digital and Seagate fell hard in the previous session after a report that Toshiba plans to expand HDD manufacturing in the Philippines. Toshiba’s plan would roughly double its production capacity. That prospect raised fears that a tight drive market, which has supported pricing for Western Digital and Seagate, could start to ease.

The firm repeated its Outperform rating on both stocks. Bernstein called the reaction “a storm in a teacup” and stated it would buy both Western Digital and Seagate on the selloff. Citi reached the same conclusion, maintaining that the HDD industry is under-shipping demand by a wide margin and recommending Western Digital and Seagate shares after the decline.

Morgan Stanley called the selloff a knee-jerk reaction and expects the gap between HDD supply and demand to stay wider than Toshiba’s potential expansion, with its analysts noting that Toshiba lacks leading-edge capacity and the heat-assisted magnetic recording technology that Western Digital and Seagate already have.

Goldman Sachs Prefers Seagate Over Western Digital

Goldman Sachs complicates the bull case for Western Digital and Seagate. The firm named Seagate one of three tactical semiconductor ideas ahead of calendar third-quarter 2026 earnings, citing Seagate’s supply discipline and recording-technology progress against competitors. That endorsement hands Seagate a near-term research boost that Western Digital lacks at Goldman Sachs.

Western Digital stock draws a Neutral rating at Goldman Sachs, which noted tactical downside risk and expects it to underperform Seagate, yet Western Digital stock is outpacing Seagate stock, suggesting traders see relief in the harder-hit name.

For sector context, the Roundhill Memory ETF (CBOE:DRAM) is practically unchanged, a sharp contrast with the gains in Western Digital and Seagate stock. That split limits the rally to HDD makers, whose supply outlook drew the weekend research attention.

What to Watch Next

The argument for Western Digital and Seagate rests on three research desks reaching the same verdict in one weekend. In that view, Toshiba’s expansion lands in a market still short of drives, and Morgan Stanley sees Western Digital and Seagate holding a technology edge in heat-assisted magnetic recording. That shared conclusion from Bernstein, Citi and Morgan Stanley gives the rebound firmer basis than a typical relief rally.

Traders can watch for whether Western Digital stock keeps outpacing Seagate stock as earnings approach, since Goldman Sachs expects the reverse. Any new detail on the timing of Toshiba’s Philippine expansion could test the view that HDD supply stays tight for Western Digital and Seagate.

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