STX
Seagate Technology Holdings plc · Technology · Market cap $157.9B
Insiders sold $379.3M net in the last 90 days ·6 sellers, 0 buyers· 18 of 31 sales under Rule 10b5-1 plans· latest Form 4 filed Oct 2, 2026
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$414.6M
reported sales (SEC code S)
Unique Insiders
6
in the rolling window
Latest filing
Oct 2, 2026
MOSLEY WILLIAM D
Seagate Technology Holdings plc (STX) has 49 SEC Form 4 filings (500 transaction rows) in the rolling window, disclosed by 6 distinct insiders. Most recent filing: Oct 2, 2026.
Inside the rolling window, 6 insiders at Seagate Technology Holdings plc reported no open-market purchases and 40 open-market sales totaling $414.6M. The most active filer is CEO MOSLEY WILLIAM D with 10 filings. Insiders have net sold $414.6M over the trailing 6 months. The most recent open-market filing is a sale of 30,000 shares by CEO MOSLEY WILLIAM D, dated Oct 1, 2026, worth $27.7M.
- Industry:Computer Hardware
- CEO:William David Mosley
- Employees:30,000
- HQ:Singapore, NW, SG
- IPO:2002-12-11
| Source | |||||||
|---|---|---|---|---|---|---|---|
| CEO | Sale | 30,000 | $27.7M | Oct 2 | -17.9% | SEC ↗ | |
| EVP & CTO | Sale | 9,354 | $8.2M | Sep 22 | — | SEC ↗ | |
| EVP & CTO | Sale | 15,465.5 | $11.9M | Sep 16 | — | SEC ↗ | |
| EVP & CFO | Sale | 49,983.5 | $38.6M | Sep 16 | — | SEC ↗ | |
| CEO | Sale | 97,889.25 | $75.6M | Sep 16 | — | SEC ↗ | |
| EVP & Chief Commercial Officer | Sale | 52,730 | $41.2M | Sep 16 | — | SEC ↗ | |
| EVP & CFO | Sale | 50,498 | $42.0M | Sep 15 | — | SEC ↗ | |
| EVP & CFO | Sale | 955 | $746K | Sep 15 | — | SEC ↗ | |
| CEO | Sale | 1,869.75 | $1.5M | Sep 15 | — | SEC ↗ | |
| EVP & CTO | Sale | 492.75 | $385K | Sep 15 | — | SEC ↗ | |
| EVP & Chief Commercial Officer | Sale | 989 | $770K | Sep 15 | — | SEC ↗ | |
| EVP & Chief Commercial Officer | Sale | 663 | $570K | Sep 11 | — | SEC ↗ | |
| EVP & CTO | Sale | 572.25 | $493K | Sep 11 | — | SEC ↗ | |
| EVP & CFO | Sale | 1,348 | $1.2M | Sep 11 | — | SEC ↗ | |
| CEO | Sale | 2,849.25 | $2.5M | Sep 11 | — | SEC ↗ | |
| CEO | Sale | 30,000 | $24.5M | Sep 3 | — | SEC ↗ | |
Conyers Yolanda LeeFirst in 3 months | Director | Sale | 750 | $611K | Sep 3 | — | SEC ↗ |
| EVP & CLO | Sale | 9,013 | $7.2M | Aug 26 | — | SEC ↗ | |
| EVP & Chief Commercial Officer | Sale | 6,048 | $5.1M | Aug 24 | — | SEC ↗ | |
| EVP & Chief Commercial Officer | Sale | 9,862 | $8.4M | Aug 24 | — | SEC ↗ | |
| CEO | Sale | 18,138.5 | $15.4M | Aug 24 | — | SEC ↗ | |
| EVP & CTO | Sale | 3,515.5 | $3.0M | Aug 24 | — | SEC ↗ | |
| EVP & CTO | Sale | 523 | $437K | Aug 24 | — | SEC ↗ | |
| EVP & CFO | Sale | 9,076.25 | $7.7M | Aug 24 | — | SEC ↗ | |
| EVP & CLO | Sale | 3,938.75 | $3.3M | Aug 24 | — | SEC ↗ |
Earnings: last 7 quarters
Congress trading STX 34 all-time
- RRep. Kevin HernSale$1,001 - $15,0002026-09-15
- RRep. Kevin HernOther$1,001 - $15,0002026-09-15
- RSen. Alan ArmstrongPurchase$1,001 - $15,0002026-03-27
- DRep. Ro KhannaPurchase$1,001 - $15,0002026-04-13
- DRep. Julie JohnsonSale$1,001 - $15,0002025-12-18
- DRep. Julie JohnsonSale$1,001 - $15,0002025-11-13
STOCK Act disclosures are filed up to 45 days after the trade. Amount is a disclosed range, not an exact figure.
Frequently asked questions
How many SEC Form 4 insider filings does STX have?
Seagate Technology Holdings plc (STX) has 49 SEC Form 4 filings (500 transaction rows) in the rolling 365-day window, disclosed by 6 distinct insiders. Most recent filing: Oct 2, 2026.
When was the most recent SEC Form 4 filing for STX?
The most recent Form 4 filing for STX on Tracefour is dated Oct 2, 2026.
Who is the most active insider at STX?
The most active SEC Form 4 filer at STX in the rolling window is CEO MOSLEY WILLIAM D, with 10 filings.
What is the net insider flow at STX over the last 6 months?
Over the trailing 180 days, insiders at STX have net sold $414.6M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at STX in the current window?
Inside the rolling window, insiders at STX bought $0 and sold $414.6M based on SEC Form 4 filings.
Can I get alerts for STX insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Seagate Technology Holdings plc (STX). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Seagate Technology Holdings plc is in the Technology sector.