WDC vs STX Stock Comparison: AI Score, Valuation, Performance and Upside
WDC (Western Digital) and STX (Seagate) are the two dominant traditional storage companies — Western Digital participates in both HDD and NAND flash markets giving it more diversification but also more complexity, while Seagate is a pure-play HDD company with deep specialization and strong positioning in the high-capacity cloud storage drives that are benefiting from AI data accumulation. Both are cyclical hardware companies whose results fluctuate with storage demand cycles.
WDC vs STX is diversified storage portfolio (Western Digital's combination of HDD and NAND flash providing multiple storage market exposures with potential value-unlock through business separation) versus pure-play HDD excellence (Seagate's singular focus on hard disk drives with HAMR technology leadership and dominant position in high-capacity cloud storage for AI data lakes) — diversified storage versus HDD specialist.
WDC holds the edge across 3 of 5 key metrics in this comparison. STX has delivered stronger 1-year price return (+132.05% vs +125.41%), though WDC has the better forward P/E setup (8.69x vs 14.99x for STX). WDC leads on both revenue growth (55.50%) and operating margin (47.68%), suggesting a stronger fundamental setup on both dimensions. Analyst consensus implies meaningfully more upside for WDC (+77.51%) than for STX (+35.58%).
Human Wall Street analysts' price targets, typically implying a ~12-month view — a separate signal from this site's own AI Prediction Signal further down the page, which is a 5-/30-day machine-learning forecast based on price history alone.
- Want storage exposure across both HDD and NAND flash — Western Digital participates in both major storage technologies, allowing the business to shift focus as different storage markets cycle through strong/weak periods
- Value the SanDisk brand in consumer flash and WD's enterprise SSD business as hedges against HDD structural decline in PC end markets
- See value in the potential business separation of WD's Flash and HDD divisions as a catalyst to unlock sum-of-the-parts value that the combined company discount currently obscures
- Want a pure-play HDD company with the most concentrated exposure to high-capacity cloud storage drives benefiting from AI data accumulation — every petabyte of AI training data needs cheap bulk storage where HDD has cost advantages
- Value Seagate's HAMR technology leadership as giving it a roadmap to ultra-high-capacity drives that increase storage density per drive, improving economics for cloud customers
- Prefer Seagate's operational focus and capital return through dividends and buybacks as a pure-play HDD income investment compared to WD's more complex multi-segment business
| Metric | WDC | STX |
|---|---|---|
| AI scorei | 72.4 | 82.6 |
| AI ranki | #29 | #7 |
| Latest closei | $338.59 | $593.76 |
| 1M returni | -18.47% | -30.06% |
| 3M returni | -35.78% | -28.55% |
| 6M returni | -23.46% | -19.60% |
| 1Y returni | +125.41% | +132.05% |
How much would $10,000 be worth today if invested at the start of each period, with all dividends reinvested?
| Period | WDC | STX |
|---|---|---|
| 1Y ago | $21.43K (+114.3%) started 2025-11-03 | $22.36K (+123.6%) started 2025-11-03 |
| 5Y ago | $80.32K (+703.2%) started 2021-11-03 | $82.63K (+726.3%) started 2021-11-03 |
| 10Y ago | $85.39K (+753.9%) started 2016-11-03 | $420.16K (+4101.6%) started 2016-11-03 |
Hypothetical — past performance does not guarantee future results.
| Metric | WDC | STX |
|---|---|---|
| Market capi | $128.64B | $188.06B |
| Trailing P/Ei | 12.09 | 59.52 |
| Forward P/Ei | 8.69 | 14.99 |
| Price/Salesi | 1.24 | 3.16 |
| EV/Revenuei | 8.86 | 15.60 |
| Analyst targeti | $610.04 | $1,125.00 |
| Target upsidei | +77.51% | +35.58% |
| Metric | WDC | STX |
|---|---|---|
| Revenue growthi | 55.50% | 48.50% |
| Earnings growthi | 50.90% | 148.80% |
| EPS growthi | +50.90% | +148.80% |
| FCF margini | +18.85% | +15.94% |
| Operating margini | 47.68% | 43.07% |
| Profit margini | 69.20% | 26.11% |
| ROIC proxyi | 129.60% | 371.53% |
| Return on equityi | 129.60% | 371.53% |
| Dividend yieldi | 0.20% | 0.36% |
| Payout ratioi | 1.93% | 15.52% |
| Dividend growth streaki | No increase yet | No increase yet |
| Betai | 2.17 | 2.10 |
| Debt/equityi | 9.86 | 179.88 |
| Current ratioi | 1.43 | 1.67 |
| Quick ratioi | 0.87 | 1.07 |
Over the past year, WDC and STX have moved strongly in the same direction (correlation of 0.90), based on daily returns.
Lower drawdown and smaller single-period drops generally indicate a smoother ride, though they do not guarantee lower future risk.
| Period | Metric | WDC | STX |
|---|---|---|---|
| 1Y | Growthi | +114.27% | +123.60% |
| CAGRi | +114.79% | +124.17% | |
| Volatilityi | 81.40% | 75.65% | |
| Sharpe ratioi | 1.30 | 1.40 | |
| Sortino ratioi | 1.94 | 2.08 | |
| Max drawdowni | 55.51% | 45.73% | |
| Current drawdowni | 54.63% | 45.73% | |
| Avg drawdowni | 16.66% | 12.39% | |
| Ulcer Indexi | 23.85% | 16.59% | |
| Max daily dropi | 14.37% | 15.23% | |
| Max wkly dropi | 21.41% | 20.12% | |
| 5Y | Growthi | +703.22% | +621.69% |
| CAGRi | +51.71% | +48.50% | |
| Volatilityi | 53.96% | 49.34% | |
| Sharpe ratioi | 0.96 | 0.96 | |
| Sortino ratioi | 1.46 | 1.44 | |
| Max drawdowni | 55.51% | 56.99% | |
| Current drawdowni | 54.63% | 45.73% | |
| Avg drawdowni | 22.44% | 20.93% | |
| Ulcer Indexi | 27.83% | 26.66% | |
| Max daily dropi | 18.26% | 16.36% | |
| Max wkly dropi | 24.82% | 21.42% | |
| 10Y | Growthi | +732.96% | +2538.17% |
| CAGRi | +23.62% | +38.73% | |
| Volatilityi | 50.88% | 43.99% | |
| Sharpe ratioi | 0.59 | 0.87 | |
| Sortino ratioi | 0.84 | 1.26 | |
| Max drawdowni | 72.21% | 56.99% | |
| Current drawdowni | 54.63% | 45.73% | |
| Avg drawdowni | 37.66% | 17.68% | |
| Ulcer Indexi | 43.29% | 22.65% | |
| Max daily dropi | 20.44% | 16.83% | |
| Max wkly dropi | 35.33% | 21.42% |
| Category | WDC | STX |
|---|---|---|
| Company | Western Digital Corporation | Seagate Technology Holdings plc |
| Sector | Technology | Technology |
| Industry | Computer Hardware | Computer Hardware |
| Core business | Western Digital is a leading data storage company with two main businesses: HDD (hard disk drives under WD and HGST brands) for cloud storage, enterprise, and consumer markets; and Flash/NAND (solid-state storage under SanDisk and WD brands) for client devices, enterprise SSDs, and consumer flash cards. Western Digital has been exploring separating its Flash and HDD businesses to unlock value. | Seagate Technology is the world's largest manufacturer of hard disk drives (HDDs) — designing and manufacturing high-capacity, high-performance hard drives for cloud/enterprise data centers, NAS (network-attached storage), surveillance systems, gaming consoles, and consumer PCs. Seagate is a pure-play HDD company without a NAND flash business. |
| Investor focus | Investors track Western Digital's revenue by segment (HDD versus Flash), cloud HDD capacity shipments (exabytes) and average selling prices, NAND flash supply-demand balance and pricing cycles, potential business separation (HDD vs Flash spinoff), and competitive dynamics with Seagate in HDD and Samsung/Micron in NAND. | Investors track Seagate's HDD exabyte shipments (how many terabytes of storage it ships), average revenue per unit (pricing), cloud vs. non-cloud revenue mix, operating margins, and the competitive landscape in HDD (primarily vs. WD/HGST and Toshiba). |
- Diversified across both HDD and NAND flash — Western Digital participates in both major storage categories, providing business balance when HDD is weak but NAND is strong, or vice versa
- SanDisk brand equity in consumer flash — SanDisk's acquisition gave WD a leading consumer flash brand; SanDisk memory cards and USB drives are market leaders globally
- Cloud HDD business serving hyperscalers — WD's high-capacity (18-26TB) CMR and SMR hard drives for cloud storage are sold to AWS, Azure, Google, and hyperscale storage customers at significant scale
- Pure-play HDD focus enables deep expertise — Seagate's singular focus on HDD technology has created class-leading areal density improvements (HAMR technology), manufacturing efficiency, and customer relationships in the HDD market
- Cloud mass-capacity HDD leadership — Seagate's Exos high-capacity drives (20-28TB+) for hyperscale cloud storage are market-leading products with strong demand from AWS, Azure, Google, and other cloud operators
- HAMR technology advantage — Seagate has commercialized Heat-Assisted Magnetic Recording (HAMR), enabling ultra-high-density drives (30TB+) that increase storage per drive, improving economics for cloud operators building vast data lakes
- NAND flash cycle volatility — the NAND flash market is highly cyclical with boom-bust pricing cycles driven by supply/demand imbalance; WD's NAND business swings from meaningful profit to meaningful losses across cycles
- HDD market structural decline in client computing — PC hard drives are being replaced by SSDs; WD's consumer HDD business faces secular decline even as cloud HDD demand grows
- Business separation complexity — the potential or actual separation of WD's Flash and HDD businesses introduces uncertainty, execution risk, and one-time costs during the transition
- Single-technology concentration — Seagate's pure-play HDD focus means it has no hedge when HDD market conditions are weak; NAND SSD competition from Samsung, Kioxia, and SK Hynix continues to commoditize storage
- PC HDD secular decline — consumer PC hard drive volumes have been declining for a decade as SSDs replace HDDs in laptops and desktops; Seagate's HDD portfolio exposed to this decline requires managing mix toward cloud and enterprise
- AI data storage demand is net positive for Seagate — AI training datasets (often petabytes of unstructured data) need cheap high-capacity storage, where HDD still has significant cost per terabyte advantages over SSDs
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