Seagate Technology (STX)
TL;DR
Seagate is one of two global leaders in mass-capacity hard drives, supplying nearly all major hyperscale cloud data centers. Just reported: revenue $3.11B (+44% YoY), record non-GAAP gross margin 47%, record operating margin 37.5%, EPS $4.10 (+115%), and free cash flow $953M. Stock at $579 (38x P/E(ttm)), up nearly 12x from $49 (5 years ago). Long-term revenue growth target raised to minimum 20%. The risk: 38x P/E prices in flawless execution on a multi-year cycle that has crashed 44% peak-to-trough before.
Summary
| Finding | Assessment |
|---|---|
| 5-Year Stock Return | $579 vs. $49 (5yr ago). TTM OP $1.4B → $4,111M (+192%). P/E(ttm) expanded 9x → 38x as AI mass-storage thesis priced in. |
| Business Model | Mass-capacity HDD leader; duopoly with WDC. Mozaic HAMR roadmap (3 → 4 → 5 TB/disc). Data Center 80%, Edge IoT 20%. ~90% of exabytes go to data centers. |
| Competitive Moat | NARROW HDD duopoly with high manufacturing barriers (HAMR photonics, internal laser). Build-to-order pricing power. But cyclicality and SSD competition limit durability. |
| Past 5-YR Drivers | HAMR/Mozaic cost-per-TB curve. Build-to-order through FY2027. AI data center capex (top-3 CSPs RPO $1.1T, doubled). 12 consecutive quarters of profitability improvement. |
| Recent Stock Move | $579 vs $144 (Jun 2025), up 4x in 12 months. Record Q3 (47% GM, 37.5% OM, $4.10 EPS, $953M FCF) and minimum-20% growth target reset drove the rally. |
| Revenue Trend | FLAT Rev YoY: 44% (Q3 2026) → 44% (Q4 2026E). |
| Margin Trend | EXPANDING OM%: 35.7% (Q3 2026) → 40.7% (Q4 2026E). |
| TTM OP Trajectory | FLAT TTM OP QoQ: 25.2% (Q3 2026) → 25.6% (Q4 2026E). TTM OP $4,111M. |
| Key Opportunities | Mosaic 4+ ramp; Mosaic 5+ (50TB) late CY27. Build-to-order through FY27, planning into CY28+. Long-term growth target raised to min 20%. Investment-grade balance sheet unlocks buyback ramp. |
| Key Risks | 38x P/E full pricing of secular narrative. Cycle reversion (HDD crashed 44% in last cycle). Hyperscaler concentration. Mosaic yield risk. Tariffs / Middle East tension. |
| Catalysts | Q4 FY2026 guide $3.45B ± $100M, EPS $5.00 ± $0.20. Mosaic 4+ qualification at remaining 2 CSPs. ~$400M convertible debt reduction. Share buyback acceleration. |
| P/E(ttm) Valuation | 38x trailing with 44% revenue growth, 47% gross margin, and minimum-20% long-term target. Priced for a secular narrative with 12 consecutive quarters of validation. Cycle peak risk if AI capex disappoints. |
Q3 FY2026 Key Data
- Revenue $3.11B (+44% YoY), beat guidance. Non-GAAP EPS $4.10 (+115%). Record GM 47%, record OM 37.5%, record FCF $953M.
- By market: Data Center $2.5B (80%, +55% YoY). Edge IoT $612M (20%, +12%). HDD exabytes 199 EB (+39%); Nearline 175 EB (+47%).
- Q4 guided at $3.45B ± $100M (+41% YoY). EPS $5.00 ± $0.20. OM lower forties %.
Key Takeaways from Earnings Call
- Long-term revenue growth target raised from "low-to-mid teens" to "minimum 20%." CEO: Seagate is "now entering a period of structural growth." Top three CSPs RPO doubled to $1.1 trillion. Nearline allocated through CY2027; build-to-order contracts through FY2027.
- Mosaic 4+ HAMR (44TB drives) revenue shipments began in late March, qualified with the two largest CSPs at PMR-equivalent timelines. Majority of HAMR exabyte by exiting CY2026; 70% of nearline by FY2027 end. Mosaic 5+ (50TB) qualification late CY2027. Wafer fab full — focus is areal density, not unit count.
- Net leverage 0.7x (vs 2.1x year ago). Fitch upgraded to investment grade. Retired $641M debt; ~$400M convertible left to address. Capital allocation pivoting to share buybacks. Dividend raised to $0.74/share.
Key Segments and Revenue Mix (Q3 FY2026)
| Segment | Q3 Revenue | % of Total | Key Details |
|---|---|---|---|
| Data Center | $2,500M | 80% | Nearline to cloud, enterprise, VIA & systems; +55% YoY. 175 EB shipped (+47% YoY). 10th consecutive quarter of cloud revenue growth. |
| Edge IoT | $612M | 20% | Client/consumer/edge applications; +12% YoY. 24 EB shipped. Tight supply offset typical March quarter seasonality. |
Business Model
SUPPLIERS
Media substrates & thin films
Read/write heads (internal)
Semiconductor components
Internally designed lasers (HAMR)
Components /
Materials
→
SEAGATE
Nearline HDDs (Mozaic HAMR)
Mosaic 4+ (44TB/drive)
Mosaic 5+ (50TB, late CY27)
Edge & client HDDs
$3.11B Q3 FY2026 Revenue
Mass Storage /
Data Solutions
→
$ Revenue
CUSTOMERS
Cloud hyperscalers (~90% of EB)
Enterprise OEMs
VIA & systems integrators
Distributors / Retailers
Top 3 CSPs RPO: $1.1T
Moat Assessment: NARROW
- HDD duopoly with Western Digital dominates mass-capacity HDD. High barriers from precision manufacturing, internally designed laser/photonics for HAMR, multi-year customer qualification cycles.
- HAMR roadmap creating durable cost/capacity advantage. Mosaic 4+ delivers 30%+ higher capacity than Mosaic 3 with minimal BOM change. CEO: HDDs are "engineering marvels" — mechanical engineering, material science, nanoscale fabrication, photonics.
- Cyclicality and customer concentration limit moat durability. Revenue swung 44% peak-to-trough 2 years ago. Hyperscaler concentration ~90% of exabyte. SSDs continue to gain share in performance tiers.
Stock vs. Earnings — 5-Year Performance
- Stock currently at $579, vs. $49 (5 years ago). Up nearly 12x as AI data center demand transformed Seagate from cyclical commodity to high-margin growth story. Stock 7x in 4 quarters from $84 (Mar 2025).
- TTM operating profit surged from $1.4B to $4,111M (+192%), recovering from a $94M trough in Q3 FY2024. Non-GAAP gross margin expanded from 23% to record 47% (Q3 FY2026). 12 consecutive quarters of profitability improvement.
- P/E(ttm) expanded from 9x to 38x, a structural re-rating to AI mass-storage enabler. At the high end of historical range, reflecting the new minimum-20% growth target.
Past 5-Year Key Drivers
- Build-to-order + supply discipline transforming HDD from commodity to pricing-power business. Contracts finalized through FY2027. 12 consecutive quarters of profitability increases. Mid-single-digit YoY data center revenue per terabyte increase.
- HAMR/Mozaic delivering structural cost-per-TB improvement. Non-GAAP gross margin expanded 23% (FY2024) to record 47% (Q3 FY2026). Mosaic 4+ began revenue shipments late March. Mosaic 5+ (50TB) targeting late CY2027.
- AI data center demand creating secular tailwind. Data center 80% of revenue, ~90% of exabyte. Top three CSPs RPO doubled to $1.1 trillion. Long-term growth target raised to minimum 20%.
Quarterly Key Metrics
| USD | Q3'24 | Q4'24 | Q1'25 | Q2'25 | Q3'25 | Q4'25 | Q1'26 | Q2'26 | Q3'26 | Q4'26E |
|---|---|---|---|---|---|---|---|---|---|---|
| Quarter End | Mar 2024 | Jun 2024 | Sep 2024 | Dec 2024 | Mar 2025 | Jun 2025 | Sep 2025 | Dec 2025 | Mar 2026 | Jun 2026 |
| Stock ($) | $92 | $102 | $110 | $86 | $85 | $144 | $236 | $275 | $392 | $579 |
| Stock QoQ | +11% | +12% | +7% | -21% | -2% | +70% | +64% | +17% | +42% | +48% |
| Rev YoY | -11% | +18% | +49% | +50% | +31% | +30% | +21% | +22% | +44% | +44% |
| OM% | 9% | 16% | 19% | 21% | 21% | 24% | 27% | 30% | 36% | 41% |
| R40 (RevYoY+OM%) | -2% | +34% | +68% | +71% | +51% | +54% | +49% | +52% | +80% | +85% |
| TTM OP ($M) | 94 | 392 | 922 | 1,350 | 1,654 | 1,940 | 2,255 | 2,614 | 3,273 | 4,111 |
| TTM OP QoQ | -65% | +317% | +135% | +46% | +23% | +17% | +16% | +16% | +25% | +26% |
| FCF/OP | 481% | 169% | 69% | 51% | 47% | 42% | 54% | 64% | 74% | 76% |
| Debt/EBITDA | 13.3x | 7.9x | 4.3x | 3.2x | 2.5x | 2.1x | 1.8x | 1.5x | 1.0x | 1.0x |
| P/E(ttm) | 145x | -787x | 39x | 18x | 13x | 16x | 24x | 25x | 30x | 38x |
Recent Stock Performance & Drivers
- Stock currently at $579, vs. $144 (Jun 2025). Up over 4x in 12 months. Q3 FY2026 was a category breakthrough — record GM, OM, FCF; EPS beat by $0.63. Long-term growth target reset to minimum 20% drove post-earnings rally.
- P/E(ttm) at 38x — high end of historical 7x-50x range. Reflects new minimum-20% growth target and CY2028+ visibility. On FY2027 implied earnings (~$20 run rate), trades at ~29x forward.
- 12 consecutive quarters of profitability improvement; 10th consecutive cloud growth quarter. CFO: "we are confident in delivering quarterly revenue growth and margin expansion through fiscal 2027." Build-to-order pricing + HAMR cost leverage unprecedented in HDD history.
Opportunities
- Mosaic 4+ ramp accelerating margin expansion as it crosses Mosaic 3 by end of CY2026. Two largest CSPs already qualified. Majority of HAMR exabyte by exit CY2026. 70% of nearline HAMR by FY2027 end. Mosaic 5+ qualification late CY2027.
- Build-to-order through FY2027; long-term growth target raised to minimum 20%. Strategic planning into CY2028+. Top 3 CSPs RPO doubled to $1.1T. Nearly all nearline capacity allocated through CY2027.
- Capital return shifting to share buybacks; investment-grade balance sheet. Fitch upgrade. Net leverage 0.7x. CFO: "primary vehicle for returning cash will be share buybacks." Already active in market.
Challenges
- 38x P/E leaves zero margin for execution misses. Stock up 4x in 12 months. Demand softening, hyperscaler capex pullback, or Mosaic yield issues could trigger sharp de-rating to historical mid-teens.
- Cyclicality risk remains structural — HDD demand crashed 44% peak-to-trough 2 years ago. Hyperscaler over-ordering remains permanent risk. AI capex narrative could reverse if model economics disappoint.
- ~$400M convertible notes still outstanding; OpEx may step up if technology pace requires more investment. CFO addressing in next 1-2 quarters. Tariffs and Middle East geopolitical tensions also flagged risks.
Next 12 Months
- Q4 FY2026 (June) guided at $3.45B ± $100M (+41% YoY), EPS $5.00 ± $0.20. OM lower forties %. CFO: revenue and profitability "continue to improve sequentially every quarter" through CY2026.
- Mosaic 4+ qualification with remaining 2 cloud customers in June quarter. Each qualification unlocks more HAMR exabyte volume. Hammer crossover with PMR by end of CY2026.
- Capital allocation: complete debt reduction (~$400M convertible) and accelerate share buybacks. Already active in market with stepped-up pace expected.
Next 12-24 Months
- Mosaic 5+ (50TB) qualification shipments target late CY2027. Same power budget and floor space. Hammer also enables cost-efficient lower-capacity products for enterprise/edge IoT.
- Build-to-order pricing visibility extends through CY2028. CFO: "every quarter will be a little bit better" through FY2027 and "possibly even longer." 70%+ incremental gross margin trajectory expected to continue.
- Share buyback ramp + declining net leverage = structural EPS compounding. Net leverage trending sub-0.5x. ~$2.4B liquidity. With minimum-20% growth, EPS growth could exceed revenue growth via buybacks.
Core Metrics Scorecard
| Q1'22 | Q2'22 | Q3'22 | Q4'22 | Q1'23 | Q2'23 | Q3'23 | Q4'23 | Q1'24 | Q2'24 | Q3'24 | Q4'24 | Q1'25 | Q2'25 | Q3'25 | Q4'25 | Q1'26 | Q2'26 | Q3'26 | Q4'26E | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Quarter End | Sep21 | Dec21 | Mar22 | Jun22 | Sep22 | Dec22 | Mar23 | Jun23 | Sep23 | Dec23 | Mar24 | Jun24 | Sep24 | Dec24 | Mar25 | Jun25 | Sep25 | Dec25 | Mar26 | Jun26 |
| R40 > 40% | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | |||||||||||
| R40 accelerate | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ||||||||
| TTM OP QoQ > 10% | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ||||||||
| TTM OP QoQ accelerate | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ||||||||||||||
| TTM FCF/OP > 60% | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| Debt/EBITDA < 3.5 | ✅ | ✅ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| Total passes | 6 | 3 | 2 | 2 | 2 | 1 | 3 | 1 | 1 | 4 | 2 | 3 | 4 | 5 | 4 | 5 | 4 | 5 | 6 | 6 |
| Stock QoQ | -6% | +37% | -20% | -21% | -25% | -3% | +27% | -6% | +7% | +25% | +11% | +12% | +7% | -21% | -2% | +70% | +64% | +17% | +42% | +48% |
| P/E(ttm) | 11x | 13x | 10x | 8x | 7x | 14x | 22x | 33x | 492x | 55x | 145x | -787x | 39x | 18x | 13x | 16x | 24x | 25x | 30x | 38x |
- Q3 FY2026 hits 6 of 6 passes — only the second 6-pass quarter in modern history (Q3 FY2022 was the other). Q3 FY2022 led to -20% stock (macro selloff); current 6-pass coincides with +42% Q/Q gain. Q4 FY2026E projects 4 passes as TTM OP comp gets harder.
- Scorecard structurally improved across the board. Debt/EBITDA failing for 9 consecutive quarters during the downturn is gone — leverage at 1.0x. FCF/OP returned to passing in Q3 FY2026. R40 above 40% for 6 consecutive quarters.
- Historical pattern: stock works hardest when passes climb from low base. At 38x P/E and 5-6 passes already, sustaining the pace becomes harder. Watch whether passes stabilize at 4-5 or revert as cycle matures.
Chart: R40 vs Stock Price (Since 2020)
Chart: Scorecard Total Passes vs Stock Price (Since 2020)
Source: SEC EDGAR annual and quarterly filings, company earnings conference calls and presentations.
Disclaimer: This report is for educational purposes only. NO investment advice.