STX (Seagate Technology Holdings PLC): Themes, ETFs, and Basket Ideas
STX is the ticker for Seagate Technology Holdings PLC. This page covers what the company does, where it's heading, its approximate earnings and valuation, key competitors, the themes it belongs to, the ETFs that hold it, and similar stocks worth looking at.
What does Seagate Technology Holdings PLC do?
Seagate Technology is one of the two major hard disk drive (HDD) manufacturers in the world, alongside Western Digital. Most Seagate revenue comes from high-capacity nearline HDDs sold to hyperscale cloud providers (Microsoft Azure, Amazon AWS, Google Cloud, Meta, Oracle) for cold and warm storage. The company has been transitioning its HDD product portfolio to higher capacities using HAMR (heat-assisted magnetic recording) technology, allowing single drives to hold 30TB+ and reach 40TB+ in development.
Seagate also has a smaller solid-state storage business and a Lyve enterprise storage services business. Founded in 1979, headquartered in Dublin, Ireland (legally domiciled there for tax reasons) with operations primarily in California. Dave Mosley has been CEO since 2017.
Where is Seagate Technology Holdings PLC heading?
1. AI-driven nearline storage demand.
AI training and inference generate massive amounts of data that must be stored cheaply at scale. HDDs remain dramatically cheaper than SSDs at the per-terabyte level, making them the storage of choice for AI training datasets, model checkpoints, and inference logs. Hyperscalers are buying more HDDs than ever.
2. HAMR ramp.
HAMR (heat-assisted magnetic recording) allows substantially higher per-drive capacities (30TB, then 40TB, then 50TB+). Higher capacity drives sell at higher prices and margins per drive. The HAMR ramp through 2025-2026 is the largest single product transition in Seagate's history.
3. Supply discipline.
Western Digital and Seagate are the only two HDD manufacturers at scale. Both have practiced supply discipline through 2024-2025, which has supported pricing and margins. Discipline persisting is the central thesis.
4. Cash return.
Seagate has historically returned substantial cash to shareholders through dividends and buybacks. The dividend yield is one of the higher ones among technology hardware names.
Risks worth tracking: SSD price declines could eventually erode HDD's per-terabyte cost advantage. HDD demand outside of nearline (PCs, consumer NAS) continues to decline secularly. HAMR yield ramps must execute cleanly.
Earnings and valuation (approximate, early 2026)
A simple financial snapshot. These are approximations and refresh quarterly; for current figures see Seagate Technology Holdings PLC's investor relations page or your broker.
- Revenue (TTM): ~$8 billion (recovering)
- Operating margin: ~20% (cyclical)
- Net income (TTM): ~$1.2 billion
- EPS (TTM): ~$5.50
- P/E (TTM): ~22x
- Price to sales: ~3x
- Dividend yield: ~2.5%
- Free cash flow: ~$1 billion annually
- Net debt: Net debt position; debt servicing is a meaningful obligation
Seagate's valuation is supported by the HDD duopoly with Western Digital and the supply discipline that has held through the recent cycle. The dividend yield is attractive; the multiple compresses if SSD pricing improves enough to threaten HDD's per-terabyte cost advantage.
STX's competitors
Hard disk drives
Western Digital is the only other major HDD manufacturer at scale. The two control essentially the entire enterprise HDD market. Toshiba is a smaller player. The duopoly structure has supported pricing and margins across recent cycles.
Solid-state storage
SSDs from Samsung, SK Hynix, Micron, Kioxia, Western Digital, and others compete for some workloads. HDDs and SSDs serve different parts of the storage hierarchy: HDDs for cheap bulk capacity, SSDs for fast access. The competition is at the boundary.
Using STX in a Walnut basket
The most useful question to ask about a single stock is rarely “will it go up?”. It's “does this fit a thesis I actually believe in, and how do I size it alongside other stocks that fit the same thesis?” That's what Walnut is built for.
Open the AI assistant on Walnut and describe a thesis (for example: “the AI infrastructure buildout”, “dividend growth large-caps”, “global semiconductors”) where STX would naturally fit. The AI proposes 5 to 6 constituents with target weights, you review, and you can fund the basket through your broker once you're ready.
Build a basket around STX with Walnut
Use Seagate Technology Holdings PLC as one constituent in a thematic basket Walnut's AI helps you assemble. Describe a thesis you believe in, the AI proposes the holdings and weights, and you approve before any broker order.
FAQ
What is Seagate's ticker symbol?
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STX, listed on Nasdaq. Officially Seagate Technology Holdings plc. Founded 1979, legally domiciled in Dublin, Ireland, with operations primarily in California. Trades during US market hours, available at every major US brokerage.
Who are Seagate's competitors?
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Western Digital is the only other major HDD manufacturer at scale; the two control essentially the entire enterprise HDD market. Toshiba is a smaller player. SSD manufacturers (Samsung, SK Hynix, Micron, Kioxia) compete for workloads at the boundary between fast and bulk storage.
Is Seagate an AI stock?
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Indirectly yes. AI training and inference generate massive amounts of data that must be stored cheaply at scale. HDDs are far cheaper per terabyte than SSDs, making Seagate's products the storage of choice for AI training datasets, model checkpoints, and inference logs. Hyperscaler AI capex drives Seagate's revenue.
What is Seagate's P/E ratio?
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Approximately 22x trailing twelve months as of early 2026. In line with the S&P 500 average (~22x). Cyclical earnings make trailing multiples less informative than for stable-earnings companies; trough-year P/E would look much higher, peak-year much lower.
What does Seagate do?
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Seagate manufactures hard disk drives (HDDs), primarily high-capacity nearline drives sold to hyperscale cloud providers for cheap bulk storage. It also has a smaller SSD business and a Lyve enterprise storage services business. HAMR technology is being ramped to enable single drives with 30TB+ capacities.
Does Seagate pay a good dividend?
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Yes. Seagate yields approximately 2.5% as of early 2026, one of the higher yields among technology hardware names. The company has historically returned substantial cash through dividends and buybacks. Dividend coverage depends on the cyclical earnings; trough years can compress the coverage ratio.
Who owns the most Seagate stock?
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Major institutional holders include Vanguard (~10%), BlackRock (~8%), and State Street (~4%). Insider ownership is low. STX is broadly institutionally owned, with a long history of being held by storage-themed and value funds.
Which ETFs have the most Seagate exposure?
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QQQ holds STX as part of the Nasdaq-100 at small weight. VGT and XLK include STX as part of the broader tech sector. SCHD does not hold STX because of cyclical earnings volatility (the methodology favors quality dividend growth with stable earnings). Storage-themed ETFs hold STX at higher weights but those funds have lower AUM.
Which thematic baskets typically include Seagate?
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Two themes on Walnut. AI infrastructure (HDDs are essential to AI training data storage, model checkpoints, and inference logs at scale) and Semiconductors (though storage is technically separate from semiconductors, STX often appears alongside semi names in AI infrastructure baskets).
Is Seagate in the S&P 500?
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Yes. Seagate has been an S&P 500 constituent for many years. It is typically a smaller S&P 500 holding by market cap, in the lower-tier weights.
What is Seagate's market cap?
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Approximately $30 billion as of early 2026. Market cap has grown materially from the 2022 cyclical lows on AI-driven nearline HDD demand and HAMR technology ramp. STX is among the larger US storage technology companies by market cap.
Is the HDD market dying?
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Not for nearline cloud storage. Despite SSD displacement in PCs and high-performance enterprise applications, HDDs remain dramatically cheaper per terabyte and continue to grow in hyperscale nearline (bulk) storage. AI training datasets, model checkpoints, and inference logs require massive cheap bulk storage; HDDs are the default. The HDD duopoly (STX + WDC) has practiced supply discipline to support pricing through cycles.
What is HAMR technology?
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Heat-Assisted Magnetic Recording is Seagate's technology for enabling higher per-drive capacities. HAMR drives can hold 30TB+ today and 40TB+ in development. Higher capacity per drive means lower cost per terabyte for hyperscale customers and higher revenue per drive for Seagate. The HAMR ramp through 2025-2026 is the largest single product transition in Seagate's history.
How does Seagate compare to Western Digital?
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Both make HDDs and SSDs. Seagate is more concentrated in nearline HDDs (cloud storage); WDC has more meaningful SSD and consumer business. The two together control essentially the entire enterprise HDD market. Both have practiced supply discipline through cycles which has supported pricing.
Should I own Seagate directly or through a tech ETF?
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Both common. Direct STX ownership gives concentrated HDD duopoly exposure plus dividend yield. Tech ETFs (VGT, QQQ) include STX at smaller weight. Many Walnut users hold both, often weighting STX in AI infrastructure baskets as the storage complement to NVDA accelerators and MU memory.
Walnut is informational, not investment advice. Financial figures on this page are approximations; always verify current numbers with Seagate Technology Holdings PLC's investor relations page or your broker before making investment decisions.