STX vs SNDK Stock Comparison: AI Score, Valuation, Performance and Upside
Seagate is a pure-play hard disk drive manufacturer competing on areal density technology like HAMR for bulk cloud and AI storage, while Sandisk is a pure-play NAND flash memory company exposed to different pricing cycles and manufacturing economics through its Kioxia joint venture. Both are storage technology plays benefiting from AI-driven data growth, but they compete in fundamentally different storage mediums with different cost structures.
Use this STX vs SNDK comparison to evaluate two different storage technology bets on AI-driven data growth. Seagate's HDD-focused exposure benefits from bulk, low-cost-per-terabyte storage demand, while Sandisk's NAND flash exposure benefits from faster-access storage demand and follows flash pricing cycles.
SNDK holds the edge across 5 of 5 key metrics in this comparison. SNDK leads on both 1-year return (+866.62%) and forward P/E quality (5.87x vs 14.99x for STX), a relatively favorable combination of momentum and valuation. SNDK leads on both revenue growth (371.60%) and operating margin (78.47%), suggesting a stronger fundamental setup on both dimensions. Analyst consensus implies similar upside for both: +35.58% for STX and +36.80% for SNDK.
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 pure-play exposure to nearline hard disk drive demand for cloud and AI bulk data storage
- Believe Seagate's HAMR technology roadmap can sustain a cost-per-terabyte advantage
- Prefer HDD's structural cost-per-terabyte advantage over flash for bulk data
- Are comfortable with cyclical enterprise and cloud capital expenditure trends
- Want pure-play exposure to NAND flash memory pricing cycles and AI-driven storage demand
- Believe the Kioxia joint venture provides durable manufacturing cost advantages
- Are comfortable with the historical cyclicality of flash memory pricing
- Prefer flash's speed and density advantages over HDD's cost-per-terabyte advantage
| Metric | STX | SNDK |
|---|---|---|
| AI scorei | 83.2 | 92.3 |
| AI ranki | #5 | #2 |
| Latest closei | $690.81 | $1,394.83 |
| 1M returni | -10.49% | -8.89% |
| 3M returni | -7.33% | -1.15% |
| 6M returni | +29.90% | +51.70% |
| 1Y returni | +214.89% | +866.62% |
How much would $10,000 be worth today if invested at the start of each period, with all dividends reinvested?
| Period | STX | SNDK |
|---|---|---|
| 1Y ago | $30.56K (+205.6%) started 2025-10-16 | $96.68K (+866.8%) started 2025-10-16 |
| 5Y ago | $110.6K (+1006.0%) started 2021-10-18 | $387.45K (+3774.5%) started 2025-02-13 |
| 10Y ago | $461.89K (+4518.9%) started 2016-10-17 | $387.45K (+3774.5%) started 2025-02-13 |
Hypothetical — past performance does not guarantee future results.
| Metric | STX | SNDK |
|---|---|---|
| Market capi | $188.06B | $227.45B |
| Trailing P/Ei | 59.52 | 21.06 |
| Forward P/Ei | 14.99 | 5.87 |
| Price/Salesi | 3.16 | N/A |
| EV/Revenuei | 15.60 | 11.01 |
| Analyst targeti | $1,125.00 | $2,125.09 |
| Target upsidei | +35.58% | +36.80% |
| Metric | STX | SNDK |
|---|---|---|
| Revenue growthi | 48.50% | 371.60% |
| Earnings growthi | 148.80% | N/A |
| EPS growthi | +148.80% | N/A |
| FCF margini | +15.94% | +38.13% |
| Operating margini | 43.07% | 78.47% |
| Profit margini | 26.11% | 56.46% |
| ROIC proxyi | 371.53% | 91.64% |
| Return on equityi | 371.53% | 91.64% |
| Dividend yieldi | 0.36% | N/A |
| Payout ratioi | 21.15% | 0.00% |
| Dividend growth streaki | No increase yet | N/A |
| Betai | 2.10 | N/A |
| Debt/equityi | 179.88 | 1.28 |
| Current ratioi | 1.67 | 2.29 |
| Quick ratioi | 1.07 | 1.71 |
Over the past year, STX and SNDK have moved strongly in the same direction (correlation of 0.70), 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 | STX | SNDK |
|---|---|---|---|
| 1Y | Growthi | +205.63% | +866.82% |
| CAGRi | +206.22% | +870.64% | |
| Volatilityi | 75.54% | 113.22% | |
| Sharpe ratioi | 1.80 | 2.54 | |
| Sortino ratioi | 2.85 | 4.30 | |
| Max drawdowni | 36.86% | 56.49% | |
| Current drawdowni | 36.86% | 40.26% | |
| Avg drawdowni | 10.81% | 15.66% | |
| Ulcer Indexi | 14.48% | 21.10% | |
| Max daily dropi | 12.24% | 20.33% | |
| Max wkly dropi | 20.12% | 36.48% | |
| 5Y | Growthi | +865.95% | +3774.53% |
| CAGRi | +57.47% | +793.76% | |
| Volatilityi | 48.55% | 104.15% | |
| Sharpe ratioi | 1.09 | 2.58 | |
| Sortino ratioi | 1.66 | 4.40 | |
| Max drawdowni | 56.99% | 56.49% | |
| Current drawdowni | 36.86% | 40.26% | |
| Avg drawdowni | 20.58% | 16.75% | |
| Ulcer Indexi | 26.39% | 22.01% | |
| Max daily dropi | 16.36% | 21.30% | |
| Max wkly dropi | 21.42% | 38.51% | |
| 10Y | Growthi | +2800.17% | +3774.53% |
| CAGRi | +40.05% | +793.76% | |
| Volatilityi | 43.52% | 104.15% | |
| Sharpe ratioi | 0.89 | 2.58 | |
| Sortino ratioi | 1.31 | 4.40 | |
| Max drawdowni | 56.99% | 56.49% | |
| Current drawdowni | 36.86% | 40.26% | |
| Avg drawdowni | 17.52% | 16.75% | |
| Ulcer Indexi | 22.50% | 22.01% | |
| Max daily dropi | 16.83% | 21.30% | |
| Max wkly dropi | 21.42% | 38.51% |
| Category | STX | SNDK |
|---|---|---|
| Company | Seagate Technology Holdings plc | Sandisk Corporation |
| Sector | Technology | Technology |
| Industry | Computer Hardware | Computer Hardware |
| Core business | Manufacturer of hard disk drives (HDDs) for enterprise, cloud, and consumer storage, including high-capacity nearline drives using HAMR (heat-assisted magnetic recording) technology aimed at cloud and AI data center bulk storage demand. | Pure-play NAND flash memory and storage company spun off from Western Digital in 2025, producing flash storage products including SSDs, memory cards, and USB drives, with NAND manufacturing conducted through its joint venture with Kioxia. |
| Investor focus | Nearline HDD demand from cloud and AI customers, HAMR technology ramp and yield progress, areal density roadmap versus competitor Western Digital, and margin trends. | NAND flash pricing trends, joint venture output and cost economics with Kioxia, demand from AI-driven data center and consumer storage needs, and standalone balance sheet management post-spinoff. |
- Early mover in HAMR technology, aiming to extend HDD areal density and maintain a cost-per-terabyte advantage for bulk storage
- Long-standing relationships with major cloud providers for enterprise nearline storage supply
- Benefits from AI-driven bulk data storage growth, since HDDs remain the lowest-cost-per-terabyte storage medium
- Pure-play focus on NAND flash allows more direct exposure to flash memory pricing cycles and AI-driven storage demand
- Long-standing Kioxia joint venture provides scaled, cost-competitive NAND manufacturing capacity
- Established brand recognition in consumer and enterprise flash storage products
- Execution risk on HAMR technology ramp and yield could affect competitiveness versus Western Digital's roadmap
- Cyclical enterprise and cloud capital expenditure trends directly affect nearline HDD order volume
- Longer-term share loss risk to NAND flash / SSDs as flash cost-per-terabyte continues to decline
- NAND flash pricing is historically cyclical and can swing sharply with supply and demand imbalances
- Standalone company execution risk following its 2025 spinoff from Western Digital
- Competitive pressure from larger, more diversified memory manufacturers such as Samsung and SK Hynix
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