Seagate Technology Holdings
STX · NASDAQ
Who owns STX
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 32.9% of STX’s shares.
- Vanguard Capital Management, LLC6.4%
- State Street Investment Management (US)4.4%
- BlackRock Institutional Trust Company, N.A.4.0%
- Vanguard Portfolio Management, LLC3.5%
- Next 6 largest institutions14.5%
- All other shareholders67.1%
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Capital Management, LLC | 14.63M | 6.44% |
| State Street Investment Management (US) | 9.91M | 4.37% |
| BlackRock Institutional Trust Company, N.A. | 9.13M | 4.02% |
| Vanguard Portfolio Management, LLC | 8.00M | 3.52% |
| Invesco Capital Management LLC | 7.34M | 3.23% |
| Fidelity Management & Research Company LLC | 7.33M | 3.23% |
| WCM Investment Management | 5.32M | 2.34% |
| Geode Capital Management, L.L.C. | 5.16M | 2.27% |
| Capital Research Global Investors | 4.33M | 1.91% |
| Sanders Capital, LLC | 3.49M | 1.54% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 7.14M | 3.15% |
| Vanguard 500 Index Fund | 5.89M | 2.59% |
| Invesco QQQ Trust | 4.82M | 2.13% |
| Statens Pensjonsfond Utland | 3.01M | 1.33% |
| iShares Core S&P 500 ETF | 2.99M | 1.32% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $505.53M (577 trades) of STX on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| MOSLEY WILLIAM D | Sale | 962 | $910.02K |
| MOSLEY WILLIAM D | Sale | 440 | $415.71K |
| MOSLEY WILLIAM D | Sale | 280 | $264.10K |
| MOSLEY WILLIAM D | Sale | 40 | $37.65K |
| MOSLEY WILLIAM D | Sale | 80 | $75.22K |
| MOSLEY WILLIAM D | Sale | 720 | $676.27K |
| MOSLEY WILLIAM D | Sale | 640 | $600.52K |
| MOSLEY WILLIAM D | Sale | 579 | $542.71K |
| MOSLEY WILLIAM D | Sale | 759 | $710.75K |
| MOSLEY WILLIAM D | Sale | 640 | $598.50K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Lisa McClainHouse | Sale | $15K–$50K | Sep 30, 2026 |
| Kevin HernHouse | Sale | $1K–$15K | Sep 15, 2026 |
| Ro KhannaHouse | Purchase | $1K–$15K | Apr 13, 2026 |
| Alan ArmstrongSenator | Purchase | $1K–$15K | Mar 27, 2026 |
| Julie JohnsonHouse | Sale | $1K–$15K | Dec 18, 2025 |
| Julie JohnsonHouse | Sale | $1K–$15K | Nov 13, 2025 |
| Kevin HernHouse | Sale | $15K–$50K | Oct 28, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 6.97M
- Days to cover
- 1.79
- % of shares outstanding
- 3.07%
- Average daily volume
- 3.90M
- Change since last report
- −23.6%
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