STX
Seagate Technology Holdings plc · Technology · Computer Hardware
Momentum inputs (comparable managers):
holder breadth +10.5% ·
share flow +30.0% ·
net new positions +9.5%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 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 | — | −3 |
| Q4 2024 | 19 | 0 | 51.85M | $2.10B | +2 | −2 |
| Q3 2024 | 18 | +4 | 61.19M | $1.84B | +4 | — |
| Q2 2024 | 14 | — | 13.27M | $1.37B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 27.70M | — | $4.00B | 0.1% | n/c | 1 | SEC ↗ ×5 |
| 2 | BlackRock ✦ (passive) | 13.90M | — | $2.01B | 0.0% | n/c | 1 | SEC ↗ ×24 |
| 3 | State Street Global Advisors ✦ (passive) | 9.00M | +5.0% | $1.31B | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 4 | Fidelity (FMR) ✦ | 6.41M | — | $925.66M | 0.1% | n/c | 1 | SEC ↗ ×8 |
| 5 | Geode Capital Management ✦ (passive) | 4.57M | +1.9% | $656.07M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 6 | D. E. Shaw & Co. ✦ | 1.69M | +11566.8% | $243.69M | 0.3% | ▲ Add | 5 | SEC ↗ ×2 |
| 7 | Norges Bank ✦ (passive) | 1.37M | +127.3% | $197.03M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 8 | Millennium Management ✦ | 43.25M | +6445.0% | $184.75M | 0.2% | ▲ Add | 5 | SEC ↗ ×2 |
| 9 | PRIMECAP Management ✦ | 983.21K | +18.4% | $141.91M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 10 | Point72 Asset Management ✦ | 954.72K | -30.3% | $137.79M | 0.3% | ▼ Trim | 4 | SEC ↗ ×2 |
| 11 | T. Rowe Price ✦ | 703.65K | +127.4% | $101.56M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 12 | Renaissance Technologies ✦ | 585.29K | +713.0% | $84.48M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 13 | Citadel Advisors ✦ | 516.04K | +118.5% | $74.48M | 0.1% | ▲ Add | 5 | SEC ↗ ×3 |
| 14 | AQR Capital Management ✦ | 483.64K | -24.5% | $68.89M | 0.1% | ▼ Trim | 5 | SEC ↗ ×7 |
| 15 | Arrowstreet Capital ✦ | 251.56K | New | $36.31M | 0.0% | New | 1 | SEC ↗ |
| 16 | Wellington Management ✦ | 224.87K | -75.9% | $32.46M | 0.0% | ▼ Trim | 5 | SEC ↗ ×7 |
| 17 | Duquesne Family Office ✦ | 197.49K | -10.0% | $28.50M | 0.7% | ▼ Trim | 5 | SEC ↗ |
| 18 | Gotham Asset Management ✦ | 46.03K | -36.0% | $6.64M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 19 | Bridgewater Associates ✦ | 25.88K | New | $3.74M | 0.0% | New | 1 | SEC ↗ |
| 20 | Adage Capital Partners ✦ | 22.90K | New | $3.31M | 0.0% | New | 1 | SEC ↗ |
| 21 | Two Sigma Investments ✦ | 8.24K | -24.7% | $1.19M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Arrowstreet Capital | $36.31M | 0.0% |
| Bridgewater Associates | $3.74M | 0.0% |
| Adage Capital Partners | $3.31M | 0.0% |
Exited
| Marshall Wace | $7.09M | 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