The HDD pricing cycle is just getting started; HAMR leadership favors STX, while SNDK’s long-term agreements enhance earnings resilience

Overview

The report combines takeaways from a non-deal roadshow with Seagate management and recent results from STX, WDC, and SNDK to assess the HDD and NAND storage cycles. The core view is that the HDD supply-demand environment remains tight and price increases have only just begun; STX is best positioned to achieve capacity share gains, cost reductions, and margin expansion thanks to its HAMR leadership. While SNDK may see slower near-term pricing leverage due to increased long-term agreement coverage, its downside earnings protection and sustainability are strengthened as a result.

Core views

First, nearline HDD orders are typically locked in four to five quarters ahead, so current pricing performance reflects negotiations from several quarters ago, and improving market prices have not yet fully flowed into financial statements. Second, major vendors are not expanding HDD unit capacity, with incremental supply dependent on increases in capacity per drive, creating structural supply discipline. Third, STX is the leading vendor actively scaling HAMR, enabling it to increase capacity share without changing unit share and to achieve better cost and margin performance than WDC. Fourth, AI training, inference, cloud computing, and enterprise storage all increase demand for data generation and retention, with most data ultimately moving into lower-cost HDD cold storage. Fifth, although SNDK’s increased long-term agreement coverage limits some near-term price upside, it can reduce NAND cyclicality and improve valuation rerating potential.

Analysis framework

The report uses a combination of management interviews, cross-company quarterly earnings comparisons, supply-demand cycle analysis, technology roadmap comparison, and P/E valuation. The analysis focuses on the conversion pace from customer long-term agreements to purchase orders, the lag in price pass-through, capacity constraints, HAMR areal density improvements, the AI data lifecycle, and differences in earnings and valuation across STX, WDC, and SNDK.

Methodology notes

• Industry analysisSupply-demand and pricing cycle analysis

  Assess the stage of the HDD pricing cycle through demand growth, capacity discipline, order lock-ins, and price pass-through lags.

  Major vendors are not increasing unit capacity, while nearline prices are locked by purchase orders four to five quarters in advance, so current results have not yet fully reflected the latest market prices.

• Technology competition analysisHAMR technology roadmap comparison

  Compare differences between HAMR and ePMR in areal density, per-drive capacity, manufacturing cost, and mass-production difficulty.

  STX’s HAMR leadership can support faster growth in shipped capacity and deeper cost reductions, while WDC’s transition to HAMR is progressing more slowly.

• Demand analysisAI data lifecycle analysis

  Assess AI’s impact on storage demand from computing, data generation, retention, and hot/cold tiered storage.

  NAND and SSDs handle high-performance and warm storage workloads, but large volumes of data retained over the long term ultimately move into lower-cost, higher-capacity HDD cold storage.

• Valuation analysisRelative P/E valuation method

  Derive stock target prices using forecast fiscal-year EPS and target P/E multiples.

  STX’s target price is based on a 21x P/E multiple on FY28 EPS of US$64.40; WDC uses a 21x P/E multiple on FY28 EPS; SNDK uses an 11x P/E multiple on FY28 EPS or 14x cycle-average EPS.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• SNDK

  Covered company in the report; Outperform rating maintained

  Strengths

  FQ4’26 performance was strong, about two-thirds of volumes are covered by long-term agreements, and downside earnings protection and sustainability have improved.

  Weaknesses

  Increased long-term agreement coverage may slow near-term average selling price growth and limit the immediate leverage from rising spot prices.

  Comparison

  Compared with HDD names, SNDK is more directly exposed to the NAND cycle, but its long-term agreements can reduce volatility and drive valuation rerating.

  Risks

  A NAND cycle downturn, long-term structural weakness, and insufficient disclosure and investor communication could weigh on valuation.

• STX

  Top pick in the HDD sector; Outperform rating maintained

  Strengths

  Leading in HAMR mass production, high order visibility, strong potential for capacity share growth, and the ability to achieve faster cost reductions and margin expansion.

  Weaknesses

  HAMR manufacturing requires more equipment, space, and longer production cycles, and demand is concentrated among large cloud customers.

  Comparison

  Compared with WDC, STX has stronger advantages in HAMR areal density, shipped capacity growth, cost reductions, and margins.

  Risks

  Cloud capex digestion, changes in hyperscaler procurement patterns, WDC catching up technologically, and NAND technology advances replacing HDD.

• WDC

  Beneficiary of the HDD cycle; Outperform rating maintained

  Strengths

  Quarterly results and guidance upgrades benefited from a favorable pricing environment, with continued support from constrained industry supply.

  Weaknesses

  Its HAMR transition lags STX, limiting the pace of areal density improvement, shipped capacity growth, and cost reductions.

  Comparison

  It also benefits from HDD price increases, but lacks STX’s technology leadership and is therefore not the report’s top pick.

  Risks

  The HAMR transition may weigh on gross margin and EPS, and it also faces risks from slowing cloud capex and NAND substitution.

Key data

• SNDK rating and target priceOutperform; US$3,000.00Based on the closing price of US$1,258.58 on August 6, 2026, this implies target-price upside of approximately 138.4%.
• STX rating and target priceOutperform; US$1,350.00Based on the closing price of US$852.95 on August 6, 2026, and it is listed as the sector top pick.
• WDC rating and target priceOutperform; US$770.00Based on the closing price of US$451.52 on August 6, 2026.
• STX nearline capacity growth targetapproximately 25% annual growthGrowth is mainly driven by HAMR increasing capacity per drive rather than by adding HDD unit capacity.
• Nearline product order lock-in periodapproximately 4 to 5 quarters before shipmentPurchase orders specify volume, price, delivery timing, HDD units, and per-drive capacity.
• STX June-quarter price changeapproximately 6% sequential growthThis mainly reflects prices negotiated about four quarters earlier, with a small amount of uncommitted capacity sold at higher market prices.
• STX nearline HAMR mixapproximately 40%Management expects the product mix to gradually shift toward being HAMR-dominant.
• SNDK long-term agreement coverageapproximately two-thirds of volumesLong-term agreements provide strong downside protection and help reduce earnings cyclicality.
• STX valuation basis21x P/E multiple on FY28 EPS of US$64.40This derives a target price of US$1,350.00 per share.
• SNDK valuation basis11x P/E multiple on FY28 EPSThis is also equivalent to 14x average EPS over the FY26 to FY30 cycle.

Impact & implications

The storage industry’s investment theme is shifting from a simple demand recovery to a cycle jointly driven by supply discipline, price pass-through, and technology roadmaps. For HDD, advance order lock-ins allow price improvements to continue into subsequent quarters, while AI inference and longer data retention periods strengthen long-term demand. STX, with its HAMR leadership, is most likely to achieve both capacity share gains and margin expansion; WDC still benefits from industry price increases, but its relative upside is limited by its need to catch up technologically. For SNDK, increased long-term agreements may sacrifice some near-term spot-price leverage, but they can reduce NAND cycle risk and support higher valuation multiples.

Risks

• Hyperscale cloud customer capex may enter a digestion phase, or changes in procurement patterns may cause HDD demand to fall short of expectations.
• WDC may narrow the HAMR technology gap with STX faster than expected, weakening STX’s room for share gains and margin improvement.
• NAND technology progress and cost declines may exceed expectations, potentially taking some storage share from HDD.
• The complexity of WDC’s HAMR transition may weigh on its gross margin and EPS.
• SNDK’s recent earnings are at a high level and may be significantly affected by a downturn in the NAND cycle.
• If NAND weakness shifts from cyclical to structural, SNDK’s discounted cash flow value and asset value may decline.
• New cloud service providers’ self-built storage remains at an early stage and has not yet completed HAMR customer qualification, creating uncertainty around long-term incremental demand.

What to watch

• Whether HDD average selling price sequential growth can remain in the mid- to high-single digits or accelerate further.
• When higher prices in locked-in purchase orders will flow into STX and WDC financial statements.
• STX’s nearline HAMR mix, per-drive capacity, and shipped capacity growth rate.
• WDC’s HAMR qualification, mass-production progress, and areal density gap versus STX.
• The amount of data generated by AI inference, data retention periods, and cold storage penetration.
• Hyperscale cloud customer capex and nearline HDD procurement plans.
• Whether new cloud service providers begin building their own storage infrastructure and become new HDD customers.
• SNDK’s long-term agreement coverage, price floor protection, and average selling price changes.
• The unit storage cost gap between NAND and HDD and potential substitution trends.