Seagate Technology, a leading hard drive manufacturer, reported its fiscal 2026 third-quarter earnings after the U.S. market closed on April 28, with revenue, profit, and guidance for the next quarter all surpassing Wall Street expectations. Following the announcement, Seagate's stock surged over 18% in after-hours trading. Its competitor Western Digital saw an approximate 11% increase, while SanDisk rose about 4%, and Micron Technology also gained around 3.5%.

The synchronized movement across the storage sector reflects the market reassessing a core question: how long will the AI-driven demand for storage last? Seagate's earnings report appears to offer an answer—it is not over yet.

Seagate's CEO declared that the storage industry is entering a "new era of structural growth," raising the multi-year annual revenue growth target from low-to-mid double digits to at least 20%. Capacity for nearline hard drives has been almost entirely pre-sold through 2027.

**Earnings Highlights: Revenue Up 44% YoY, Cash Flow Hits Decade High** This quarter, Seagate's revenue reached $3.11 billion, a 44% increase year-over-year, exceeding analyst expectations of $2.96 billion.

Performance on the profit side was even more impressive. Non-GAAP earnings per share were $4.10, a 115% increase from $1.90 in the same period last year, significantly beating the market consensus of $3.51. GAAP earnings per share were $3.27, compared to $1.57 a year ago.

Regarding gross margin, the non-GAAP gross margin reached 47%, an improvement of 480 basis points from the previous quarter. The non-GAAP operating margin expanded to 37.5%, an increase of 560 basis points sequentially.

Cash flow was another highlight this quarter. Seagate generated free cash flow of $953 million, a substantial year-over-year increase. Chief Financial Officer Gianluca Romano stated on the earnings call that this represents the "highest level in over a decade." Concurrently, the company repaid $641 million in debt during the quarter and returned $191 million to shareholders through dividends and share repurchases.

**Guidance Stuns: Next Quarter EPS Forecast Beats Expectations by 26%** What truly excited the market was Seagate's guidance for the fourth quarter.

The company anticipates fourth-quarter revenue of $3.45 billion (plus or minus $100 million), whereas analysts had previously expected only $3.16 billion. The non-GAAP EPS guidance is $5.00 (plus or minus $0.20), compared to the analyst forecast of $3.97.

This implies that Seagate's expectation for next quarter's EPS is approximately 26% higher than Wall Street's consensus.

CFO Gianluca Romano said on the call, "Based on the midpoint of the revenue guide, non-GAAP operating margin is expected to reach the low-end of the 40% range." This indicates that Seagate's operating margin is set to continue climbing, rather than stagnating.

**Why Can Price Increases Continue? Capacity is Nearly Sold Out, Locked Through 2027** The core logic behind this storage market cycle is a fundamental supply-demand imbalance.

CEO Dave Mosley explicitly stated in the report, "We believe Seagate is entering a new era of structural growth. AI applications are amplifying data creation, supporting sustained storage demand."

Specific numbers support this assessment:

* This quarter's exabyte shipments reached 199 exabytes, a 39% increase year-over-year. * The data center market contributed 88% of exabyte shipments and 80% of revenue, totaling $2.5 billion, a 55% annual increase. * Nearline hard drive capacity has been allocated through supply agreements with nearly all major cloud providers and hyperscale customers, with capacity almost fully booked for the entirety of 2027. * The company is currently engaging with customers on build-to-order agreements for fiscal year 2027, locking in specific configurations and prices; strategic planning discussions have extended to 2028 and beyond.

Regarding the key investor concern of whether price increases can be sustained, Seagate's management provided a clear signal.

CFO Gianluca Romano revealed on the call that the company has completed build-to-order contracts for fiscal 2027, securing specific product configurations and pricing. "Nearline capacity is essentially fully allocated for the next four quarters... We are confident in delivering sequential quarterly revenue and profit growth throughout fiscal 2027 based on the product mix, pricing, and shipments." On pricing strategy, he emphasized, "We have executed this strategy for 12 consecutive quarters and will continue to advance it."

Mosley added on the call, "We see rising demand. Our goal remains to lock in prices with customers, giving them predictability so they have reliable economic plans for building data centers, while we also know the returns our factories will achieve."

**How Does AI Drive Hard Drive Demand? The Logic is More Solid Than Imagined** Many still view hard drives as "traditional storage," but the data logic of the AI era is reshaping this perception.

This quarter, the data center market contributed 88% of Seagate's exabyte shipments and 80% of its revenue, with data center revenue reaching $2.5 billion, up 55% year-over-year. Nearline HDDs, designed for large-scale data centers, accounted for nearly 90% of total exabyte shipments.

Dave Mosley explained the transmission path of AI demand on the call: "We are at an inference inflection point—computing infrastructure is shifting from periodic training to an engine that continuously generates massive amounts of data. Leading AI chatbots process billions of user requests daily, each consuming and producing multimodal outputs, driving unprecedented growth in data creation."

Further driving this is Agentic AI: no longer sporadic interactions but continuously automated workflows that constantly ingest inputs, generate inferences, and store persistent outputs, significantly increasing data intensity and long-term storage needs.

Mosley also mentioned the scenario of physical AI: a single autonomous vehicle can generate up to 4TB of data per hour, with some data requiring retention for 5 to 10 years for compliance. "These inference applications are simultaneously creating incremental demand for both cloud and on-premise storage."

He cited another persuasive data point: the remaining performance obligations of the world's three largest cloud service providers have nearly doubled, reaching a staggering $1.1 trillion—"a clear signal of sustained growth."

**HAMR Technology Accelerates Deployment, Next-Gen Roadmap Clear** Understanding Seagate's ability to sustain price increases and expand margins is tied to its core technology roadmap—HAMR technology and the related Mozaic product platform.

Simply put, traditional hard drive technology is nearing its physical limits for areal density, while HAMR uses laser heating to enable higher-density writing, packing more capacity into the same hardware cost.

* **Mozaic 4**: Offers over 4TB per disk and up to 44TB per drive, a more than 30% increase over the first-generation Mozaic, without requiring additional disks or heads, keeping material costs largely flat. Mosley stated that shipments to customers began in late March, and Mozaic 4 is expected to constitute the majority of HAMR-based exabyte shipments by the end of 2026. * **Mozaic 5**: Aims for 50TB per drive, with qualification samples expected to be provided to customers by the end of 2027.

This logic shares similarities with the semiconductor industry's Moore's Law: increasing density through technology advancement rather than simply adding parts. Each product generation offers customers more capacity without a significant cost increase, while Seagate's cost per terabyte decreases and margins improve.

Romano explained the cost advantage on the call: "The primary driver of future cost reduction is the mix shift to higher-capacity models—the 40TB HAMR drive will be the core driver, not adding more materials."

**Annual Revenue Growth Target Raised to "At Least 20%"** This was perhaps the most significant statement in the earnings report.

Mosley announced on the call that the multi-year annual revenue growth target has been significantly raised from the "low-to-mid double digits" set at the previous investor day to "at least 20%."

He provided three key supporting reasons:

1. **Sustainability of Storage Demand**: AI is accelerating data creation, with simultaneous growth in cloud data centers, enterprise edge, and physical AI scenarios. 2. **Certainty of the Technology Roadmap**: The Mozaic platform is progressing on schedule, and the transition to HAMR products is meeting or exceeding expectations. 3. **Operational Discipline**: The build-to-order model enhances demand visibility, supporting pricing and supply discipline; capital expenditure is strictly controlled within 4%-6% of revenue.

He added supporting data for continued cloud investment: this quarter marked the 10th consecutive quarter of revenue growth from Seagate's cloud customers, who have collectively committed hundreds of billions of dollars in infrastructure capital expenditure.

**Capital Return: Focus Shifts to Buybacks After Debt Management** In recent quarters, Seagate has used significant cash flow for debt reduction. In the first three quarters of this fiscal year, total debt has been reduced by approximately $1.1 billion, with the net leverage ratio falling to 0.7x.

Romano stated that the approximately $400 million convertible notes due in 2028 will be addressed this quarter or next. Regarding capital deployment thereafter, he said directly, "The majority will likely go towards share repurchases. We are already active in the market and may increase the pace in the coming quarters."

Mosley concluded, "Last year, we focused on replenishing working capital and repairing the supply chain. Now we are returning to our previous direction—returning value to shareholders."