Seagate CEO confirms hard-disk drive product capacity is fully pre-booked through 2028, with customer orders extending into 2029.

On July 28, Seagate released its FY2026 Q4 earnings report, which received a positive response after hours. The report not only exceeded financial expectations but also revealed a critical reality: capacity has become so tight that it's rewriting industry narratives.

The Q4 report showed revenue of $3.63 billion, up 48% year-over-year, with non-GAAP gross margin surging from 37.9% in the same period last year to 52.7%, marking the 13th consecutive quarter of expansion.

Seagate CEO Dave Mosley stated in the earnings call: "Our near-line capacity through the end of the 2026 calendar year is completely booked," and "many customers are actively extending their plans to 2029 and beyond."

Seagate's report showed that data centers now account for approximately 90% of the company's EB shipments. In Q4 FY2026, the company shipped 195 EB to data centers, up 11% sequentially and 43% year-over-year.

The significance of this report lies not in merely meeting expectations. Q4 revenue of $3.63 billion exceeded analyst expectations of $3.49 billion by approximately 4.6%. Adjusted earnings per share of $5.71 represents 120% growth year-over-year, outperforming market expectations by 12%. Most critically, non-GAAP gross margin surged from 37.9% to 52.7%, marking the 13th consecutive quarter of expansion; adjusted operating margin reached 44.6%, beating market expectations of 41.9% by 270 basis points. The company generated $1.3 billion in operating cash flow and $1.1 billion in free cash flow in the quarter.

For the full year, FY2026 revenue reached $12.2 billion, up 34% year-over-year, while free cash flow hit $3.1 billion, a company record.

In the earnings call, Seagate's CEO noted that cloud customer EB demand has achieved quarter-over-quarter sequential growth for three consecutive years, and "with AI applications further layering on top of traditional demand, we see no signs of growth slowing."

Two driving factors merit attention. First is AI inference and agentic workloads. Seagate's joint research with SK Hynix found that agents generate tokens at levels up to 15 times higher than conventional chatbots. This contextual data exists as KV cache and must be persisted in storage. Seagate projects that by 2031, storage data volume related to agentic applications will reach 10 ZB.

Second is physical AI. Yu Kang, Seagate's China regional market and business strategy lead, noted: "SSDs account for roughly 20% in data centers, with the remaining 80% being mechanical hard drives."

IDC experts point out that the essence of this pricing surge is the "siphoning effect" of AI chips on storage capacity. A single HBM die occupies two to three times the wafer area of conventional memory chips, and a single AI server requires eight to ten times the DRAM capacity of an ordinary server. Samsung, SK Hynix, and Micron have redirected 70-80% of advanced-node capacity toward HBM production, continuously squeezing supplies of general-purpose DRAM and NAND flash.

TrendForce data shows that Q1 2026 DRAM contract prices rose 90-95% sequentially, with Q2 climbing another 58-63%—the last time such increases appeared was before the 2008 financial crisis.

The global mechanical hard drive market now has only three players: Western Digital, Seagate, and Toshiba, collectively controlling approximately 80% of global capacity. However, oligopoly alone doesn't guarantee price increases; if manufacturers race to expand capacity, prices collapse regardless. The true key is the industry discipline cultivated over the past decade.

Seagate's CEO spoke bluntly in the earnings call: "After emerging from the last industry downturn, the company's strategy has been to maintain stable total hard drive shipments, and we continue to adhere to this strategy." Over the past year, the total number of platters and heads per drive increased 15-20%, yet total hard drive shipments remained completely flat.

Seagate CFO Romano elaborated: "We don't satisfy demand growth by increasing output, but by increasing areal density." Near-line hard drive average capacity grew 22% year-over-year, while cloud customers' average capacity has approached 26TB.

Another constraint stems from technology itself. HDD manufacturing involves materials science, magnetic recording, photonics, and nanoscale wafer production—making it nearly impossible for new entrants to build competitive capacity in the short term. Western Digital's CEO stated that the issue is not capital, but time—developing competitive capacity from scratch requires over a decade. In a May 5, 2026 report, Bernstein quoted a former Western Digital NAND executive: "HDD companies have endured over a decade of overcapacity; they don't intend to return to that era."

Southwest University economist Liu Jianxin's assessment is more direct: this is not simply cyclical price increases, but a long-term structural shift driven by AI, with the pricing cycle potentially extending to 2028.

Current near-line HDD prices stand at roughly $14-15 per TB. Morgan Stanley's supply chain research shows that suppliers' target prices for the next two to three years have increased to $25-30 per TB.

Seagate's CEO revealed a key mechanism in the July 28 earnings call: contracts typically lock in pricing for one year, but when product yields improve, additional capacity becomes available. "Customers are willing to pay above-contract prices to capture this additional capacity. That's why you see this step-function increase."

An early HAMR customer once enjoyed favorable pricing, but CFO Romano made clear: "In the June quarter, the volume sold at favorable prices was already minimal, and by the September quarter there will be none at all." It's evident who holds pricing power.

Seagate's Q4 non-GAAP gross margin reached 52.7%, the 13th consecutive quarter of expansion. September quarter guidance implies margins of approximately 57%, with operating margins around 50%. CFO Romano stated: "Our incremental margins well exceed 60%... the trend is obviously toward ever-stronger gross margins, and our September quarter guidance is already approaching that figure." Goldman Sachs confirmed in its report that HDD manufacturers' 2026 strategies show the industry is more actively raising per-unit capacity pricing rather than simply increasing volume.

Seagate spent over 20 years developing HAMR (heat-assisted magnetic recording), which increased per-platter capacity from 3TB to 4TB and 5TB. Mozaic 4 (up to 44TB per platter) is accelerating volume production with the two largest global cloud service providers. By end of FY2026, HAMR products account for 40% of near-line HDD EB shipments, expected to reach 50% by end of 2026. Mozaic 5 (over 5TB per platter) is planned for sample validation by end of 2027.

HAMR's value lies in continuously expanding EB output without increasing physical capacity, thus steadily reducing cost per EB. Seagate's CEO explained HAMR's profit mechanics in the earnings call: when products transition from 3TB to 4TB per platter, factories require brief downtime for transition, with yield ramp uncertainties. "When we exceed our plan, cost performance often surpasses expectations, and that's the source of profit flexibility."

Seagate China regional market head Yu Kang performed a calculation: taking a 1EB deployment as an example, compared to a 30TB hard drive solution, Mozaic 4+ reduces hard drive count by approximately 32%, data center footprint by 32%, infrastructure efficiency gains of 47%, and annual energy consumption reduction of nearly 0.8 GWh. These are precisely the metrics that hyperscale customers care most about.

On July 28, when the entire storage sector plummeted, Seagate's "completely booked capacity, customers locked in through 2029" earnings report drove post-market gains of over 6%. Management explicitly committed in the call that "FY2027 growth will exceed FY2026 growth."

Over the past two decades, the HDD industry followed a "price increase—capacity expansion—overcapacity—crash" cycle. But this time, Seagate's CEO's comment that "capacity is locked through 2028" reveals a fundamental shift: supply is locked, demand is buoyed by AI. Seagate's CEO characterized the current stage as a "new era of structural growth"; Goldman Sachs, TrendForce, and other institutions judge supply-demand tightness will persist at least through the second half of 2027.

This pricing surge is also transmitting to consumers. According to recent visits to Huaqiangbei in Shenzhen, 1TB SSDs have risen from approximately 410 yuan last year to 950 yuan, while 32GB DDR5 memory has surged from 900 yuan to 3,800 yuan. Storage chips' share of end-device system costs jumped from 15% to over 35%, with IDC forecasting global PC shipments in 2026 will decline 11.3% year-over-year.

Demand is structural, supply is locked, and technology continues driving costs down. These three forces converging are diminishing the weight of cyclical narratives. The hard drive industry is transitioning from cyclical hardware manufacturing to a critical component of AI infrastructure.