TLDR
- Seagate and Toshiba are reportedly battling to acquire TDK’s magnetic-heads business for hard-disk drives.
- The deal could be worth several billion dollars, according to Bloomberg.
- Seagate stock fell about 2% in premarket trading Tuesday.
- Toshiba has denied the Bloomberg report, adding confusion to the story.
- Seagate shares already dropped last week on news Toshiba plans to double its AI data-center drive capacity by fiscal 2027.
Seagate Technology (STX) stock slipped roughly 2% in premarket trading Tuesday. The drop came after a Bloomberg report said Seagate is competing with Toshiba to buy TDK Corp’s magnetic-heads business for hard-disk drives.
Seagate Technology Holdings plc, STX
Magnetic heads are a key part of any HDD. They let drives read and write data stored on the disk surface.
TDK is currently the only independent company that makes these heads. It supplies them to Seagate, Toshiba, and Western Digital (WDC) alike.
Bloomberg reported the deal could be worth several billion dollars, citing people familiar with the matter. Neither Seagate nor Toshiba responded to requests for comment early Tuesday.
Toshiba later denied the report. That denial added another layer of uncertainty to an already messy morning for the stock.
A Rough Week for Storage Stocks
This isn’t the first scare for Seagate investors lately. Shares tumbled sharply on October 2 after reports said Toshiba plans to double its production capacity for AI data-center drives by fiscal 2027.
Western Digital stock fell too, though it has climbed 6% more recently as the storage trade cools off and heats back up in waves. Morgan Stanley and Bernstein both stepped in afterward, arguing the market had overreacted to the Toshiba capacity news.
That helped Seagate stock rebound some on Monday. But it hasn’t fully recovered the ground it lost, and Tuesday’s TDK headlines aren’t helping.
Adding to the cautious mood, Seagate’s CEO sold shares earlier this month under a pre-arranged Rule 10b5-1 trading plan. These plans are set up in advance and don’t necessarily signal anything bearish, but investors tend to notice the timing anyway.
Why This Matters for the HDD Supply Chain
Whoever ends up owning TDK’s magnetic-heads unit gains real leverage over the entire hard-drive industry. Seagate, Toshiba, and Western Digital all depend on this one supplier for a part they can’t easily source elsewhere.
That’s part of why this story has legs beyond a single morning’s headline. The HDD business has been booming this year as AI data centers demand more storage capacity than ever.
Seagate stock has more than tripled in 2026 so far. That run has left some investors nervous about how much further the stock can climb without a pullback.
The broader market gave Seagate no cover on Tuesday. The S&P 500 was up 0.5%, the Dow rose 0.6%, and the Nasdaq gained 0.7%, meaning the pressure on Seagate was specific to the company, not the market as a whole.
Seagate’s next earnings report is expected around October 28. The stock is trading well below its 52-week high of $1,145, hit before last week’s sharp pullback.
For now, the TDK bidding situation remains unresolved. Toshiba’s denial means investors are left waiting for clearer details before the next move.
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