STX
Seagate Technology Holdings plc · Technology · Computer Hardware
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2026
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 4 | 0 | 97.81K | $85.38M | n/a | n/a |
| Q2 2026 | 180 | +7 | 151.14M | $145.50B | +10 | −2 |
| 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 | TD Waterhouse Canada Inc. | 56.21K | -14.4% | $53.15M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 2 | Wealth Enhancement Advisory… | 33.38K | +5.8% | $24.65M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 3 | Assenagon Asset Management S.A. | 7.43K | -49.3% | $6.85M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 4 | Ninety One UK Ltd | 791 | +325.3% | $729,573 | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| No tracked exits this quarter. |
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