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Of the 20 tracked institutions holding STX, 14 have a 3-year clone track record — 13 of them beat the S&P. Average holder's clone alpha: +6.6pt. It's a gauge of who owns the name, not just how many.
Among the 20 tracked institutional investors we monitor, STX (SEAGATE TECHNOLOGY HLDNGS PL) is held with a combined value of $24.41B across 70,656,318 shares. The largest holder is VANGUARD GROUP INC with a position worth $7.74B (0.11% of their portfolio). Duquesne Family Office LLC opened a new position in the most recent quarter. 9 funds increased their holdings. 10 funds reduced their position.
Total Institutional Value
$24.41B
Total Shares Held
70,656,318
Institutional Holders
20
% of Shares Outstanding
31.5%
of 224.23M shares · SEC 2026-04-27
Days to Cover
1.7+11.5%
7.34M shares short · FINRA 2026-07-15
Tracked 13F institutions hold 31.5% of STX's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-04-27), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
0
$0
14
$10.74M
Total Transactions
14
Last 12 months
| Date | Insider | Code | Type | Shares | Value |
|---|---|---|---|---|---|
| Jul 23, 2026 | James CI Lee | S | Sale | 542 | $490.51K |
| Jul 1, 2026 | WILLIAM D MOSLEY | S | Sale | 1,480 | $1.36M |
| Jun 12, 2026 | John Christopher Morris | S | Sale | 466 | $410.17K |
| Jun 12, 2026 | Ban Seng Teh | S | Sale | 989 | $870.51K |
| Jun 12, 2026 | WILLIAM D MOSLEY | S | Sale | 1,768 | $1.56M |
| Jun 12, 2026 | Gianluca Romano | S | Sale | 903 | $794.81K |
| Jun 10, 2026 | Gianluca Romano | S | Sale | 523 | $429.76K |
| Jun 10, 2026 | Ban Seng Teh | S | Sale | 663 | $544.89K |
| Jun 10, 2026 | WILLIAM D MOSLEY | S | Sale | 1,536 | $1.26M |
| Jun 10, 2026 | John Christopher Morris | S | Sale | 254 | $208.70K |
Showing 10 of 14 transactions
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $7.74B | 0.11% | -0.1% |
| 2 | BlackRock, Inc. | $5.59B | 0.10% | -11.4% |
| 3 | STATE STREET CORP | $3.66B | 0.13% | -0.5% |
| 4 | FMR LLC | $3.20B | 0.17% | +117.5% |
| 5 | Capital Research Global Investors | $2.25B | 0.35% | +27.1% |
| 6 | PRICE T ROWE ASSOCIATES INC /MD/ | $492.99M | 0.06% | +8.2% |
| 7 | AQR CAPITAL MANAGEMENT LLC | $383.99M | 0.18% | +17.4% |
| 8 | MILLENNIUM MANAGEMENT LLC | $260.16M | 0.11% | +51.5% |
| 9 | Point72 Asset Management, L.P. | $214.05M | 0.37% | +37.4% |
| 10 | Avala Global LP | $148.65M | 7.14% | +25.0% |
| Member | Type | Date |
|---|---|---|
| Alan Armstrong | Buy | Mar 27, 2026 |
| Julie Johnson | Sell | Dec 18, 2025 |
| Julie Johnson | Sell | Nov 13, 2025 |
| Kevin Hern | Sell |
As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of STX with a position worth $7.74B, representing 0.11% of their portfolio. In total, 20 institutional investors hold STX with a combined value of $24.41B.
In the most recent quarter, 1 fund opened a new position in STX. Additionally, 9 increased their holdings and 10 reduced their positions.
Institutional investors hold $24.41B worth of STX stock across 20 positions. The largest institutional holder is VANGUARD GROUP INC with $7.74B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For STX, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their STX positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| Oct 28, 2025 |
| Lisa McClain | Buy | Sep 8, 2025 |
| Julie Johnson | Sell | Aug 14, 2025 |
| Julie Johnson | Sell | Jul 29, 2025 |
| Rob Bresnahan | Sell | Apr 8, 2025 |
Showing 8 of 10. STOCK Act disclosures lag up to 45 days.
Last Close
$851.69
2026-07-24
YTD
+196.2%
74% of 52-week range
