Seagate Technology Holdings plc Insider Trading Activity
Every SEC Form 4 insider transaction reported for Seagate Technology Holdings plc (STX), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are STX insiders buying or selling?
In the last 12 months, Seagate Technology Holdings plc insiders reported 0 open-market purchases ($0) and 83 sales ($594.4M) — net selling of $594.4M. Since January 2018, Trabud has recorded 302 Form 4 filings for STX: 8 buys ($343.8M) and 294 sells ($2.5B).
Source: SEC EDGAR Form 4
What stands out
- No Seagate Technology Holdings plc insider made an open-market purchase in the last 12 months; the 83 reported open-market sales totaled $594.4M.
Key Statistics (January 2018 – Oct 2, 2026)
Total Form 4 filings
302
SEC EDGAR
Insider filers
26
Insider buys (8)
$343.8M
Insider sells (294)
$2.5B
Insider sentiment
Net sellingNet insider flow of $2.2B in net selling since January 2018, and $594.4M in net selling over the last 12 months.
Recent STX insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | William D Mosley | CEO | Sale | 11.0K | $935.60 | $10.3M | SEC ↗ |
| Oct 2, 2026 | William D Mosley | CEO | Sale | 19.0K | $914.67 | $17.4M | SEC ↗ |
| Sep 22, 2026 | John Christopher Morris | EVP & CTO | Sale | 9.4K | $877.91 | $8.2M | SEC ↗ |
| Sep 16, 2026 | Gianluca Romano | EVP & CFO | Sale | 50.0K | $772.16 | $38.6M | SEC ↗ |
| Sep 16, 2026 | William D Mosley | CEO | Sale | 97.9K | $772.14 | $75.6M | SEC ↗ |
| Sep 16, 2026 | Ban Seng Teh | EVP & Chief Commercial Officer | Sale | 52.7K | $782.08 | $41.2M | SEC ↗ |
| Sep 16, 2026 | John Christopher Morris | EVP & CTO | Sale | 15.5K | $772.15 | $11.9M | SEC ↗ |
| Sep 15, 2026 | Ban Seng Teh | EVP & Chief Commercial Officer | Sale | 989 | $779.00 | $770.4K | SEC ↗ |
| Sep 15, 2026 | John Christopher Morris | EVP & CTO | Sale | 492.75 | $781.23 | $385.0K | SEC ↗ |
| Sep 15, 2026 | Gianluca Romano | EVP & CFO | Sale | 5.6K | $841.95 | $4.7M | SEC ↗ |
| Sep 15, 2026 | Gianluca Romano | EVP & CFO | Sale | 45.9K | $830.01 | $38.1M | SEC ↗ |
| Sep 15, 2026 | William D Mosley | CEO | Sale | 1.9K | $781.23 | $1.5M | SEC ↗ |
| Sep 11, 2026 | Ban Seng Teh | EVP & Chief Commercial Officer | Sale | 663 | $860.09 | $570.2K | SEC ↗ |
| Sep 11, 2026 | John Christopher Morris | EVP & CTO | Sale | 572.25 | $862.13 | $493.4K | SEC ↗ |
| Sep 11, 2026 | Gianluca Romano | EVP & CFO | Sale | 1.3K | $862.13 | $1.2M | SEC ↗ |
| Sep 11, 2026 | William D Mosley | CEO | Sale | 2.8K | $862.13 | $2.5M | SEC ↗ |
| Sep 3, 2026 | William D Mosley | CEO | Sale | 30.0K | $816.28 | $24.5M | SEC ↗ |
| Sep 3, 2026 | Yolanda Lee Conyers | Director | Sale | 750 | $815.11 | $611.3K | SEC ↗ |
| Aug 26, 2026 | James CI Lee | EVP & CLO | Sale | 9.0K | $794.84 | $7.2M | SEC ↗ |
| Aug 24, 2026 | Ban Seng Teh | EVP & Chief Commercial Officer | Sale | 9.9K | $852.97 | $8.4M | SEC ↗ |
| Aug 24, 2026 | Ban Seng Teh | EVP & Chief Commercial Officer | Sale | 6.0K | $842.97 | $5.1M | SEC ↗ |
| Aug 24, 2026 | John Christopher Morris | EVP & CTO | Sale | 4.0K | $847.57 | $3.4M | SEC ↗ |
| Aug 24, 2026 | James CI Lee | EVP & CLO | Sale | 3.9K | $849.35 | $3.3M | SEC ↗ |
| Aug 24, 2026 | Gianluca Romano | EVP & CFO | Sale | 9.1K | $849.35 | $7.7M | SEC ↗ |
| Aug 24, 2026 | William D Mosley | CEO | Sale | 18.1K | $849.35 | $15.4M | SEC ↗ |
Showing the 25 most recent of 302 Form 4 filings for Seagate Technology Holdings plc.
Most active STX insiders
- Stephen J Luczo51 filings
- William D Mosley47 filings
- Ban Seng Teh44 filings
- Gianluca Romano26 filings
- John Christopher Morris24 filings
Ask anything about STX insider activity
Use Trabud's AI agent to query Seagate Technology Holdings plc's Form 4 history in plain English — "Show me STX CEO purchases this year" or compare it against any other ticker.
Open the AI agentSTX insider trading FAQ
Are Seagate Technology Holdings plc insiders buying or selling?
In the last 12 months, Seagate Technology Holdings plc insiders reported 0 open-market purchases ($0) and 83 sales ($594.4M) — net selling of $594.4M. Since January 2018, Trabud has recorded 302 Form 4 filings for STX: 8 buys ($343.8M) and 294 sells ($2.5B). Over the full record that is net selling of $2.2B.
How many insiders trade STX stock?
26 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Seagate Technology Holdings plc. The most recent filing was accepted on Oct 2, 2026.
Where does Trabud get STX insider trading data?
All STX insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.