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Smart Money Score
Composite context from Form 4, 13F and congressional disclosures; not a forecast.
Of the 27 tracked institutions holding STX, 20 have a 3-year clone track record — 18 of them beat the S&P. Average holder's clone alpha: +5.8pt. It's a gauge of who owns the name, not just how many.
Among the 27 tracked institutional investors we monitor, STX (SEAGATE TECHNOLOGY HLDNGS PL) is held with a combined value of $53.75B across 75,784,271 shares. The largest holder is BlackRock, Inc. with a position worth $14.64B (0.22% of their portfolio). 7 funds opened new positions in the most recent quarter. 12 funds increased their holdings. 8 funds reduced their position.
Total Institutional Value
$53.75B
Total Shares Held
75,784,271
Institutional Holders
27
% of Shares Outstanding
33.4%
of 226.64M shares · SEC 2026-07-31
Days to Cover
1.7+1.4%
8.16M shares short · FINRA 2026-08-14
Tracked 13F institutions hold 33.4% 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 2026-07-31), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
0
$0
100
$71.39M
Total Transactions
100
Last 12 months
| Date | Insider | Code | Type | Shares | Value |
|---|---|---|---|---|---|
| Sep 1, 2026 | WILLIAM D MOSLEY | S | Sale | 4,287 | $3.50M |
| Sep 1, 2026 | WILLIAM D MOSLEY | S | Sale | 600 | $494.96K |
| Sep 1, 2026 | WILLIAM D MOSLEY | S | Sale | 2,080 | $1.70M |
| Sep 1, 2026 | WILLIAM D MOSLEY | S | Sale | 2,878 | $2.34M |
| Sep 1, 2026 | WILLIAM D MOSLEY | S | Sale | 1,160 | $939.08K |
| Sep 1, 2026 | WILLIAM D MOSLEY | S | Sale | 80 | $66.43K |
| Sep 1, 2026 | WILLIAM D MOSLEY | S | Sale | 600 | $493.73K |
| Sep 1, 2026 | WILLIAM D MOSLEY | S | Sale | 2,040 | $1.66M |
| Sep 1, 2026 | WILLIAM D MOSLEY | S | Sale | 1,578 | $1.28M |
| Sep 1, 2026 | WILLIAM D MOSLEY | S | Sale | 480 | $394.58K |
Showing 10 of 100 transactions
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $14.64B | 0.22% | +6.3% |
| 2 | STATE STREET CORP | $9.57B | 0.28% | +6.3% |
| 3 | FMR LLC | $7.87B | 0.34% | -0.3% |
| 4 | VANGUARD GROUP INC | $7.74B | 0.11% | -0.1% |
| 5 | Capital Research Global Investors | $4.18B | 0.58% | -24.6% |
| 6 | WELLINGTON MANAGEMENT GROUP LLP | $2.33B | 0.40% | +2655.9% |
| 7 | PRICE T ROWE ASSOCIATES INC /MD/ | $1.38B | 0.14% | +13.7% |
| 8 | AQR CAPITAL MANAGEMENT LLC | $1.20B | 0.42% | +24.4% |
| 9 | LONE PINE CAPITAL LLC | $965.11M | 5.90% | New |
| 10 | Point72 Asset Management, L.P. | $794.11M | 1.21% | +50.6% |
| 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, BlackRock, Inc. is the largest institutional holder of STX with a position worth $14.64B, representing 0.22% of their portfolio. In total, 27 institutional investors hold STX with a combined value of $53.75B.
In the most recent quarter, 7 funds opened a new position in STX. Additionally, 12 increased their holdings and 8 reduced their positions.
Institutional investors hold $53.75B worth of STX stock across 27 positions. The largest institutional holder is BlackRock, Inc. with $14.64B 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 →
| 2026-07-31 |
SEC Schedule 13D (activist) and 13G (passive) filings for STX. Filed when an investor acquires 5%+ ownership.
| 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
$885.92
2026-09-09
YTD
+208.1%
77% of 52-week range