Seagate Technology Holdings plc (STX) Insider Trading
Over the last 3 months, STX insiders made 0 open-market buys and 145 sales, a net sale of -$105.5M (SEC Form 4). Over the last 6 months, 1114 institutions increased and 1124 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
145
Net (3m)
-$105.5M
Insider trades by month Buys Sells
Jun
Jul
Aug
Context3-month price -4.2%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Grant | 1,775 | — |
| Aug 24, 2026 | Morris John Christopherofficer: EVP & CTO | Grant | 1,309 | — |
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Sell | 510 | $852.90 |
| Aug 24, 2026 | Chong Kian Fattofficer: EVP Global Operations | Option | 4,258 | — |
| Aug 24, 2026 | Lee James CIofficer: EVP & CLO | Sell | 668 | $849.35 |
| Aug 24, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Option | 6,320 | — |
| Aug 24, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Option | 6,404 | — |
| Aug 24, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 3,393 | $849.35 |
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Sell | 926 | $845.03 |
| Aug 24, 2026 | Chong Kian Fattofficer: EVP Global Operations | Option | 1,310 | — |
| Aug 24, 2026 | Lee James CIofficer: EVP & CLO | Grant | 3,788 | $850.24 |
| Aug 24, 2026 | Lee James CIofficer: EVP & CLO | Grant | 403 | — |
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Sell | 500 | $860.50 |
| Aug 24, 2026 | Lee James CIofficer: EVP & CLO | Grant | 1,343 | — |
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Sell | 280 | $839.60 |
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Sell | 400 | $849.27 |
| Aug 24, 2026 | Morris John Christopherofficer: EVP & CTO | Option | 1,764 | — |
| Aug 24, 2026 | Morris John Christopherofficer: EVP & CTO | Sell | 608 | $849.35 |
| Aug 24, 2026 | Morris John Christopherofficer: EVP & CTO | Grant | 2,307 | — |
| Aug 24, 2026 | Morris John Christopherofficer: EVP & CTO | Option | 523 | $158.40 |
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Sell | 630 | $852.05 |
| Aug 24, 2026 | Chong Kian Fattofficer: EVP Global Operations | Option | 1,278 | — |
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Sell | 200 | $840.53 |
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Grant | 1,389 | — |
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Sell | 160 | $854.21 |
| Aug 24, 2026 | Teh Ban Sengofficer: EVP & Chief Commercial Officer | Sell | 89 | $837.27 |
| Aug 24, 2026 | Lee James CIofficer: EVP & CLO | Option | 1,512 | — |
| Aug 24, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Grant | 5,280 | — |
| Aug 24, 2026 | Romano Gianlucaofficer: EVP & CFO | Sell | 1,470 | $849.35 |
| Aug 24, 2026 | Romano Gianlucaofficer: EVP & CFO | Grant | 4,259 | — |
Source: STX SEC Form 4 filings, latest Aug 24, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their STX positions over the last 6 months (SEC Form 13F).
Increased
1114
New positions
889
Reduced
1124
Sold out
70
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 15.2M | Aug 7, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 14.6M | Aug 13, 2026 |
| BLACKROCK, INC. | Reduced | 14.3M | May 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 14.2M | May 15, 2026 |
| SANDERS CAPITAL, LLC | Reduced | 12.9M | May 14, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 11.1M | May 8, 2026 |
| STATE STREET CORP | Increased | 9.9M | Aug 7, 2026 |
| STATE STREET CORP | Reduced | 9.3M | May 15, 2026 |
| FMR LLC | Increased | 8.2M | May 15, 2026 |
| FMR LLC | Reduced | 8.2M | Aug 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 8.0M | Aug 13, 2026 |
| JANE STREET GROUP, LLC | Increased | 7.9M | Aug 14, 2026 |
| Invesco Ltd. | Increased | 7.5M | Aug 14, 2026 |
| JPMORGAN CHASE & CO | Reduced | 6.7M | May 13, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 5.9M | Aug 14, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.