Toshiba's $400 million disk bet just repriced the AI storage duopoly
Nikkei reported Toshiba will double hard-drive capacity by fiscal 2027, and Seagate and Western Digital fell 11% and 7%. Seven quarters of scarcity pricing, gross margin up more than 16 points at both, is exactly what a returning third supplier now bids against.
Vincent Jiang · 2 min read
One unconfirmed report from Tokyo moved two of the year's hottest AI stocks. Nikkei wrote that Toshiba will spend about ¥60 billion, $380–400 million, to double hard disk drive capacity by fiscal 2027 at its Philippine plant, its first major disk investment in about five years 13. Seagate opened down 11% and Western Digital 7%, with SanDisk off about 1% 1; by mid-session Seagate was down roughly 12% and Western Digital 9.5%, while the Roundhill Memory ETF sat near flat and the QQQ rose more than 1% 2.
The selloff deepened through Friday's session
- At the open
- Mid-session
Data
| At the open | Mid-session | |
|---|---|---|
| Seagate | -11% | -12% |
| Western Digital | -7% | -9.5% |
The pricing power sits in the margin line
What got repriced is sitting in the income statement. Seagate's gross margin climbed from 34.9% of revenue in the December 2024 quarter to 52.3% in the July 2026 quarter; Western Digital's rose from 37.7% to 54.1% 45. Both grew revenue more than 40% year over year last quarter 45. The chief executives said it plainly: Seagate's Dave Mosley in April, "the total number of units is not really increasing"; Western Digital's Irving Tan in August, tight supply gives "an opportunity for increased pricing leverage" 2. Scarcity carried the stocks to gains of roughly 240% and 170% this year before Friday 16.
Two drive makers, one scarcity premium: gross margins up 16 to 17 points since 2024
- Seagate
- Western Digital
Data
| Seagate | Western Digital | |
|---|---|---|
| Q4 '24 | 34.9% | 37.7% |
| Q1 '25 | 35.2% | 39.8% |
| Q2 '25 | 37.4% | 41% |
| Q3 '25 | 39.4% | 43.5% |
| Q4 '25 | 41.6% | 45.7% |
| Q1 '26 | 46.5% | 50.2% |
| Q2 '26 | 52.3% | 54.1% |
The shortage recruited its own replacement
The complication is that the same shortage built those margins and brought the third supplier back. Memory is so scarce that SSDs cost about 20 times more than disks, which is pushing AI data centers onto nearline drives 7. Toshiba, holding just over 10% of industry capacity, now aims at a 30% share, with products lifting capacity per drive as much as 40% 17. The entire bet is roughly a quarter of Seagate's operating income in its latest quarter alone, $1.56 billion 4. Doubling a 10% base is a bid, not a rupture.
Contracts, density and a very small check
The bull answer is that contracts outrun headlines. Seagate says nearline capacity is almost fully allocated through calendar 2027, the vast majority through 2028, and Western Digital has committed most of its 2027 supply under long-term agreements 7. Seagate's 44TB HAMR drives already ship to 75% of the top cloud customers 8. Toshiba has confirmed none of it and did not respond to a comment request; its fiscal 2027 runs through March 2028 9.
The 2029 price table decides it
What settles the trade is the price table for 2029–31, where Western Digital says commercial terms are still being negotiated 8. Watch for Toshiba to confirm the plan, then for hyperscalers to qualify its Philippine lines. The shortage priced these disks. The price tag just invited the competition.
Deepdive
AI-generated from this story and its cited sources. Not investment advice.
