Seagate CEO sells 30,000 shares in 10b5-1 plan
STX’s CEO exercised options and sold 30,000 shares under a pre-arranged Rule 10b5-1 trading plan.
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Form Type
4
Rhea-AI Filing Summary
Seagate Technology Holdings plc (STX) CEO and director William D. Mosley exercised 14,000 stock options on September 1, 2026 at an exercise price of $46.23 per share, receiving 14,000 Ordinary Shares, and on the same date sold 30,000 Ordinary Shares in multiple transactions at weighted-average prices detailed between roughly the low-$800s per share. All transactions were effected pursuant to a Rule 10b5-1 trading plan adopted on February 18, 2026.
Insider Trade Summary 10b5-1
Exercise and sale activity reported; no spread calculated
Exercise and Sale
28 txns
Insider
MOSLEY WILLIAM D
Role
CEO
Sold
30,000 shs ($24.49M)
Approx. gross sale proceeds
$24.49M
Approx. exercise cost
$647K
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | NQ Options F28 | 14,000 | $0.00 | $0.00 |
| Exercise | Ordinary Shares F1 | 14,000 | $46.23 | $647K |
| Sale | Ordinary Shares F2 | 357 | $804.6083 | $287K |
| Sale | Ordinary Shares F3 | 160 | $805.5481 | $129K |
| Sale | Ordinary Shares F4 | 160 | $807.1925 | $129K |
| Sale | Ordinary Shares F5 | 960 | $808.6201 | $776K |
| Sale | Ordinary Shares F6 | 1,160 | $809.5514 | $939K |
| Sale | Ordinary Shares F7 | 1,105 | $810.7833 | $896K |
| Sale | Ordinary Shares F8 | 1,578 | $811.7276 | $1.28M |
| Sale | Ordinary Shares F9 | 1,200 | $812.5473 | $975K |
| Sale | Ordinary Shares F10 | 2,040 | $813.7388 | $1.66M |
| Sale | Ordinary Shares F11 | 2,878 | $814.7507 | $2.34M |
| Sale | Ordinary Shares F12 | 4,555 | $815.7493 | $3.72M |
| Sale | Ordinary Shares F13 | 4,287 | $816.7463 | $3.50M |
| Sale | Ordinary Shares F14 | 2,080 | $817.7063 | $1.70M |
| Sale | Ordinary Shares F15 | 1,040 | $818.7821 | $852K |
| Sale | Ordinary Shares F16 | 1,320 | $819.8442 | $1.08M |
| Sale | Ordinary Shares F17 | 920 | $820.893 | $755K |
| Sale | Ordinary Shares F18 | 480 | $822.0497 | $395K |
| Sale | Ordinary Shares F19 | 600 | $822.89 | $494K |
| Sale | Ordinary Shares F20 | 1,240 | $824.0484 | $1.02M |
| Sale | Ordinary Shares F21 | 600 | $824.9347 | $495K |
| Sale | Ordinary Shares F22 | 580 | $825.9983 | $479K |
| Sale | Ordinary Shares F23 | 340 | $826.86 | $281K |
| Sale | Ordinary Shares F24 | 120 | $827.8967 | $99K |
| Sale | Ordinary Shares F25 | 80 | $829.095 | $66K |
| Sale | Ordinary Shares F26 | 80 | $830.36 | $66K |
| Sale | Ordinary Shares F27 | 80 | $832.045 | $67K |
Holdings After Transaction:
NQ Options — 97,100 contracts (Direct);
Ordinary Shares — 295,167.5 shares (Direct)
Footnotes (28)
- F1. All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 18, 2026.
- F2. These Ordinary Shares were sold in multiple trades at prices ranging from $804.17 to $804.83. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F3. These Ordinary Shares were sold in multiple trades at prices ranging from $805.21 to $805.76. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F4. These Ordinary Shares were sold in multiple trades at prices ranging from $806.93 to $807.42. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F5. These Ordinary Shares were sold in multiple trades at prices ranging from $808.02 to $809.00. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F6. These Ordinary Shares were sold in multiple trades at prices ranging from $809.05 to $810.01. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F7. These Ordinary Shares were sold in multiple trades at prices ranging from $810.17 to $811.14. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F8. These Ordinary Shares were sold in multiple trades at prices ranging from $811.18 to $812.10. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F9. These Ordinary Shares were sold in multiple trades at prices ranging from $812.19 to $813.04. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F10. These Ordinary Shares were sold in multiple trades at prices ranging from $813.20 to $814.19. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F11. These Ordinary Shares were sold in multiple trades at prices ranging from $814.23 to $815.22. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F12. These Ordinary Shares were sold in multiple trades at prices ranging from $815.28 to $816.27. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F13. These Ordinary Shares were sold in multiple trades at prices ranging from $816.28 to $817.27. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F14. These Ordinary Shares were sold in multiple trades at prices ranging from $817.29 to $818.20. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F15. These Ordinary Shares were sold in multiple trades at prices ranging from $818.29 to $819.18. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F16. These Ordinary Shares were sold in multiple trades at prices ranging from $819.32 to $820.29. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F17. These Ordinary Shares were sold in multiple trades at prices ranging from $820.36 to $821.26. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F18. These Ordinary Shares were sold in multiple trades at prices ranging from $821.44 to $822.37. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F19. These Ordinary Shares were sold in multiple trades at prices ranging from $822.47 to $823.42. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F20. These Ordinary Shares were sold in multiple trades at prices ranging from $823.47 to $824.40. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F21. These Ordinary Shares were sold in multiple trades at prices ranging from $824.47 to $825.44. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F22. These Ordinary Shares were sold in multiple trades at prices ranging from $825.51 to $826.27. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F23. These Ordinary Shares were sold in multiple trades at prices ranging from $826.52 to $827.29. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F24. These Ordinary Shares were sold in multiple trades at prices ranging from $827.76 to $828.17. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F25. These Ordinary Shares were sold in multiple trades at prices ranging from $829.09 to $829.10. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F26. These Ordinary Shares were sold in multiple trades at prices ranging from $830.22 to $830.50. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F27. These Ordinary Shares were sold in multiple trades at prices ranging from $832.02 to $832.07. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
- F28. Options granted to the Reporting Person are subject to a four year vesting schedule. One quarter of the option shares vested on September 9, 2021. The remaining option shares vest in equal monthly installments over the 36 months following September 9, 2021.
Key Figures
Options exercised: 14,000 options
Exercise price: $46.23 per share
Shares sold: 30,000 shares
+4 more
7 metrics
Options exercised
14,000 options
Non-qualified stock options exercised on September 1, 2026
Exercise price
$46.23 per share
Exercise price for 14,000 options converted into Ordinary Shares
Shares sold
30,000 shares
Total Ordinary Shares sold in multiple transactions on September 1, 2026
Sale price ranges
$804.17–$832.07 per share
Representative price ranges from footnoted multiple-trade sales
Remaining options in this grant
97,100 options
Directly held non-qualified stock options after the reported exercise
Rule 10b5-1 plan adoption date
February 18, 2026
Date the trading plan governing these transactions was adopted
Option expiration date
September 9, 2027
Expiration date for the exercised non-qualified stock option grant
Key Terms
Rule 10b5-1 trading plan, weighted average sale price, non-qualified stock options, Ordinary Shares
4 terms
Rule 10b5-1 trading plan regulatory
"All transactions reported were effected pursuant to a Rule 10b5-1 trading plan"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average sale price financial
"The price reported above reflects the weighted average sale price"
non-qualified stock options financial
"Options granted to the Reporting Person are subject to a four year vesting schedule"
Non-qualified stock options are a type of employee benefit that gives individuals the right to buy company shares at a set price, usually lower than the market value, within a certain period. Unlike other options that may have special tax advantages, these options are taxed as income when exercised, which can affect how much money the employee or investor ultimately gains. They are important because they can influence company compensation strategies and impact the financial outcomes for employees and investors.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider activity did STX CEO William D. Mosley report on this Form 4?
He exercised 14,000 stock options at $46.23 per share into Ordinary Shares and sold 30,000 Ordinary Shares in multiple transactions on September 1, 2026, at weighted-average prices described in the filing.
How many Seagate (STX) stock options did the CEO exercise and at what price?
He exercised 14,000 non-qualified stock options for Ordinary Shares at an exercise price of $46.23 per share on September 1, 2026, as disclosed in the Form 4.
Were the STX CEO’s September 1, 2026 transactions under a Rule 10b5-1 plan?
Yes. The Form 4 and footnotes state that all reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 18, 2026.
What option holdings remain for the STX CEO after this reported exercise?
After exercising 14,000 options, the filing reports a remaining direct holding of 97,100 non-qualified stock options with an expiration date of September 9, 2027 for that option grant.
AI-generated analysis. How Rhea-AI works. Not financial advice.
