STX vs WDC
Seagate Technology Holdings plc (STX) and Western Digital Corp (WDC) are both filed with the SEC under Computer Storage Devices. STX is 1.2× WDC's size by market cap ($192.0B against $166.6B); STX trades at the higher fiscal-year P/E (125.1× against 90.2×); WDC reports the higher net margin (19.8% against 16.1%); STX grew sales faster over three years (-7.9% against -20.3%); and over the past year WDC returned +461.5% against STX's +385.3%.
| STX | WDC | |
|---|---|---|
| Last close | $829.76 | $459.45 |
| Market cap | $192.0B | $166.6B |
| P/E (FY) | 125.1× | 90.2× |
| P/S | 21.1× | 17.5× |
| EV/EBITDA | 90.6× | 59.6× |
| Gross margin | — | 38.8% |
| Operating margin | 20.8% | 24.5% |
| Net margin | 16.1% | 19.8% |
| Return on equity | — | 23.4% |
| Sales growth (3y) | -7.9% | -20.3% |
| EPS growth (3y) | -2.7% | +1.5% |
| Dividend yield | 0.3% | 0.0% |
| 1-year return | +385.3% | +461.5% |
Screener snapshot — prices as of 2026-08-28. Each side's last close is the most recent session the snapshot holds for that company, which can be an earlier one, and its 1-year return is measured to that close. Market caps struck on 2026-08-27. Last close, market cap and the 1-year return are price figures; every other row is computed over the company's latest filed fiscal year — FY2025 (ended 2025-06-27) for both. — not published for this company. A ratio goes unpublished for more than one reason: a component the calculation needs is not on file, the filing does not tag the line it is read from, or the calculation is not defined on the filed basis — EV/EBITDA is not printed on non-positive EBITDA, and return on equity is not computed on a zero or negative equity base.
Who holds them, and who has traded them
| STX | WDC | |
|---|---|---|
| Institutional holders (13F) | 1,443 | 1,401 |
| Insider buyers − sellers (180d) | -5 | -5 |
| Congressional trades disclosed (180d) | 1 | 1 |
| Executive-branch officials on file — trades disclosed (180d) | 7 | 5 |
Counts only. The congressional figures count transactions dated in the trailing 180 days and disclosed in STOCK Act periodic transaction reports; amounts are filed as ranges and are never summed. The executive-branch figures count the same window of transactions, and they are scoped to one roster. The officials OGE posts for direct download. Insider buyers − sellers counts distinct people filing open-market Form 4 purchases minus distinct people filing open-market sales over the trailing 180 days, capped at ±5.
STX vs WDC: common questions
- Is STX bigger than WDC?
- STX carries the larger market cap — $192.0B against $166.6B, both struck on 2026-08-27.
- Which trades at a higher P/E, STX or WDC?
- STX, at a fiscal-year 125.1× against 90.2× for WDC. Both are price ÷ latest full-year diluted earnings per share, not a trailing-twelve-month P/E.
- How have STX and WDC performed over the past year?
- WDC returned +461.5% and STX +385.3%, measured on the trailing calendar year to the last close.
- How many institutions hold STX and WDC?
- 1,443 13F filers report a position in STX and 1,401 in WDC, on the latest quarter in the panel.
- Are STX and WDC in the same industry?
- Both are filed with the SEC under Computer Storage Devices, which is the classification this pairing is built on.
STX overview → · WDC overview → · STX institutional ownership → · WDC institutional ownership → · Congress and STX → · Congress and WDC → · Executive branch and STX → · Executive branch and WDC →
More in Computer Storage Devices: NTAP vs STX · NTAP vs WDC
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Source: SPZCO — https://spzco.com/vs/stx-vs-wdc