STX
Seagate Technology Holdings plc · Technology · Computer Hardware
Momentum inputs (comparable managers):
holder breadth +8.7% ·
share flow -17.8% ·
net new positions +4.0%
· formula
Ownership fragmentation: more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 178 | +7 | 149.79M | $144.19B | +10 | −4 |
| Q1 2026 | 175 | +8 | 161.32M | $60.73B | +9 | −2 |
| Q4 2025 | 167 | -1 | 286.32M | $48.08B | +1 | −1 |
| Q3 2025 | 25 | +2 | 121.83M | $24.68B | +2 | −1 |
| Q2 2025 | 21 | +2 | 112.89M | $10.24B | +3 | −1 |
| Q1 2025 | 16 | -3 | 19.10M | $1.63B | n/a | −3 |
| Q4 2024 | 19 | 0 | 51.85M | $2.10B | +2 | −2 |
| Q3 2024 | 18 | +4 | 61.19M | $1.84B | +4 | n/a |
| Q2 2024 | 14 | n/a | 13.27M | $1.37B | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 28.14M | +1.6% | $6.64B | 0.1% | ▲ Add | 2 | SEC ↗ ×5 |
| 2 | JPMorgan Chase ✦ | 27.87M | n/a | $6.58B | 0.2% | n/c | 1 | SEC ↗ ×54 |
| 3 | BlackRock ✦ (passive) | 14.40M | +3.6% | $3.40B | 0.1% | ▲ Add | 2 | SEC ↗ ×24 |
| 4 | State Street Global Advisors ✦ (passive) | 9.28M | +3.0% | $2.20B | 0.1% | ▲ Add | 4 | SEC ↗ ×2 |
| 5 | Morgan Stanley ✦ | 5.06M | n/a | $1.19B | 0.1% | n/c | 1 | SEC ↗ ×17 |
| 6 | Geode Capital Management ✦ (passive) | 4.66M | +2.1% | $1.10B | 0.1% | ▲ Add | 6 | SEC ↗ ×2 |
| 7 | Goldman Sachs Group ✦ | 3.73M | n/a | $879.57M | 0.1% | n/c | 1 | SEC ↗ ×6 |
| 8 | Arrowstreet Capital ✦ | 2.95M | +1072.5% | $696.26M | 0.4% | ▲ Add | 2 | SEC ↗ |
| 9 | D. E. Shaw & Co. ✦ | 2.01M | +18.8% | $473.39M | 0.4% | ▲ Add | 6 | SEC ↗ ×2 |
| 10 | Fidelity (FMR) ✦ | 1.98M | -69.1% | $467.69M | 0.0% | ▼ Trim | 2 | SEC ↗ ×8 |
| 11 | Millennium Management ✦ | 18.28M | -57.7% | $233.67M | 0.2% | ▼ Trim | 6 | SEC ↗ ×2 |
| 12 | T. Rowe Price ✦ | 843.60K | +19.9% | $199.14M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 13 | AQR Capital Management ✦ | 714.28K | +47.7% | $164.86M | 0.1% | ▲ Add | 6 | SEC ↗ ×8 |
| 14 | PRIMECAP Management ✦ | 654.56K | -33.4% | $154.51M | 0.1% | ▼ Trim | 6 | SEC ↗ |
| 15 | Point72 Asset Management ✦ | 535.00K | -44.0% | $126.29M | 0.3% | ▼ Trim | 5 | SEC ↗ ×2 |
| 16 | Bridgewater Associates ✦ | 162.11K | +526.3% | $38.27M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 17 | Wellington Management ✦ | 120.71K | -46.3% | $28.50M | 0.0% | ▼ Trim | 6 | SEC ↗ ×7 |
| 18 | Citadel Advisors ✦ | 96.33K | -81.3% | $22.74M | 0.0% | ▼ Trim | 6 | SEC ↗ ×3 |
| 19 | Marshall Wace ✦ | 93.37K | New | $22.04M | 0.0% | New | 1 | SEC ↗ ×2 |
| 20 | Duquesne Family Office ✦ | 85.90K | -56.5% | $20.28M | 0.5% | ▼ Trim | 6 | SEC ↗ |
| 21 | Adage Capital Partners ✦ | 80.10K | +249.8% | $18.91M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 22 | Renaissance Technologies ✦ | 57.06K | -90.2% | $13.47M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 23 | Gotham Asset Management ✦ | 41.38K | -10.1% | $9.77M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 24 | Two Sigma Investments ✦ | 3.75K | -54.5% | $884,753 | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
| 25 | Fisher Asset Management ✦ | 1.23K | New | $289,866 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Marshall Wace | $22.04M | 0.0% |
| Fisher Asset Management | $289,866 | 0.0% |
Exited
| Norges Bank | $197.03M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1,440 holders, 178.17M shares, $68.20B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 40 sh · $35,622
Officer · 160 sh · $138,897
Officer · 915 sh · $818,257
Officer · 974 sh · $852,590
Officer · 40 sh · $35,451
Officer · 40 sh · $36,083
Officer · 760 sh · $666,174
Officer · 80 sh · $71,782
Officer · 520 sh · $453,212
Officer · 986 sh · $862,261
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology