Seagate (STX) CEO sells 30,000 shares after exercising stock options
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
Seagate Technology Holdings plc CEO William D. Mosley reported a series of open-market transactions in Ordinary Shares. On May 20, 2026, he sold 30,000 Ordinary Shares in multiple trades pursuant to a Rule 10b5-1 trading plan adopted on February 18, 2026.
The shares were sold in price ranges from $741.70 to $763.70, with each line item reflecting a weighted average sale price. On the same date, Mosley exercised 14,000 nonqualified stock options at an exercise price of $46.23 per share, acquiring the same number of Ordinary Shares. Following these transactions, he holds 339,591 Ordinary Shares directly and 153,100 nonqualified options with a $46.23 exercise price expiring on September 9, 2027.
Positive
- None.
Negative
- None.
Insights
CEO executes 10b5-1 exercise-and-sell, retains sizable equity stake.
William D. Mosley, CEO of Seagate Technology Holdings plc, executed a classic exercise-and-sell pattern. He exercised 14,000 stock options at an exercise price of $46.23 and sold 30,000 Ordinary Shares in open-market trades on May 20, 2026.
The filing shows 19 sale transactions totaling 30,000 shares, with weighted average prices within ranges from $741.70 to $763.70. All sales were made under a pre-arranged Rule 10b5-1 trading plan adopted on February 18, 2026, indicating the timing was scheduled in advance rather than opportunistic.
After these trades, Mosley directly owns 339,591 Ordinary Shares and holds 153,100 nonqualified options with a $46.23 exercise price expiring on September 9, 2027. This suggests the transaction is a routine liquidity and compensation event while leaving a substantial ongoing equity exposure. The overall signal is neutral.
Insider Trade Summary 10b5-1
Net Seller: 30,000 shares ($22,538,569)
Net Sell
21 txns
Insider
MOSLEY WILLIAM D
Role
CEO
Sold
30,000 shs ($22.54M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | NQ Options | 14,000 | $0.00 | -- |
| Exercise | Ordinary Shares | 14,000 | $46.23 | $647K |
| Sale | Ordinary Shares | 120 | $742.005 | $89K |
| Sale | Ordinary Shares | 560 | $743.1391 | $416K |
| Sale | Ordinary Shares | 840 | $744.5162 | $625K |
| Sale | Ordinary Shares | 1,264 | $745.5531 | $942K |
| Sale | Ordinary Shares | 1,463 | $746.5326 | $1.09M |
| Sale | Ordinary Shares | 1,605 | $747.636 | $1.20M |
| Sale | Ordinary Shares | 1,719 | $748.5291 | $1.29M |
| Sale | Ordinary Shares | 1,619 | $749.6696 | $1.21M |
| Sale | Ordinary Shares | 4,810 | $750.8449 | $3.61M |
| Sale | Ordinary Shares | 4,206 | $751.745 | $3.16M |
| Sale | Ordinary Shares | 3,182 | $752.7204 | $2.40M |
| Sale | Ordinary Shares | 2,708 | $753.6946 | $2.04M |
| Sale | Ordinary Shares | 2,163 | $754.6994 | $1.63M |
| Sale | Ordinary Shares | 1,661 | $755.722 | $1.26M |
| Sale | Ordinary Shares | 1,480 | $756.8286 | $1.12M |
| Sale | Ordinary Shares | 320 | $758.0475 | $243K |
| Sale | Ordinary Shares | 80 | $758.65 | $61K |
| Sale | Ordinary Shares | 80 | $760.485 | $61K |
| Sale | Ordinary Shares | 120 | $763.18 | $92K |
Holdings After Transaction:
NQ Options — 153,100 shares (Direct, null);
Ordinary Shares — 369,591 shares (Direct, null)
Footnotes (1)
- 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. These Ordinary Shares were sold in multiple trades at prices ranging from $741.70 to $742.19. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $742.70 to $743.55. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $743.96 to $744.91. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $745.03 to $746.02. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $746.10 to $747.08. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $747.16 to $748.13. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $748.16 to $749.08. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $749.16 to $750.15. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $750.18 to $751.13. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $751.19 to $752.17. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $752.19 to $753.18. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $753.20 to $754.19. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $754.22 to $755.21. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $755.22 to $756.19. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $756.26 to $757.19. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $757.49 to $758.19. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $760.20 to $760.77. 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. These Ordinary Shares were sold in multiple trades at prices ranging from $762.83 to $763.70. 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. Options granted to the Reporting Person under the Issuer's 2012 Equity Incentive Plan are subject to a four year vesting schedule. Subject to continuous employment, one quarter of the option shares vested on September 9, 2021. The remaining option shares vested in equal monthly installments over the 36 months following September 9, 2021.
Key Figures
Shares sold: 30,000 Ordinary Shares
Options exercised: 14,000 shares at $46.23/share
Post-transaction share holdings: 339,591 Ordinary Shares
+3 more
6 metrics
Shares sold
30,000 Ordinary Shares
Open-market sales on May 20, 2026 under Rule 10b5-1 plan
Options exercised
14,000 shares at $46.23/share
Exercise of nonqualified stock options into Ordinary Shares
Post-transaction share holdings
339,591 Ordinary Shares
Direct ownership after all reported transactions
Remaining options
153,100 NQ options at $46.23
Nonqualified options outstanding after exercise, expiring September 9, 2027
Sale price ranges
$741.70–$763.70 per share
Price ranges for multiple sale trades as described in footnotes
Option expiration
September 9, 2027
Expiration date for the nonqualified stock options
Key Terms
Rule 10b5-1 trading plan, NQ Options, weighted average sale price, Equity Incentive Plan, +1 more
5 terms
Rule 10b5-1 trading plan financial
"All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"
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.
NQ Options financial
"security_title: "NQ Options" with an exercise price of $46.2300 per share"
weighted average sale price financial
"The price reported above reflects the weighted average sale price"
Equity Incentive Plan financial
"Options granted to the Reporting Person under the Issuer's 2012 Equity Incentive Plan are subject to a four year vesting schedule"
An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.
nonqualified stock options financial
"NQ Options represent nonqualified stock options with an exercise price of $46.23"
A nonqualified stock option is a company-issued right that lets an employee or contractor buy shares later at a preset price, like a coupon to purchase stock regardless of the market price. It matters to investors because when the option is used the recipient owes ordinary-income tax on the difference between market and preset price, which affects the holder’s financial decisions and can change the company’s share count and reported expenses.
FAQ
What did Seagate (STX) CEO William D. Mosley report in this Form 4?
He reported selling 30,000 Ordinary Shares of Seagate in open-market trades and exercising 14,000 stock options. All transactions occurred on May 20, 2026, under a pre-arranged Rule 10b5-1 trading plan adopted earlier that year.
What stock options did the Seagate (STX) CEO exercise in this filing?
Mosley exercised 14,000 nonqualified stock options covering Ordinary Shares at an exercise price of $46.23 per share. These options were granted under Seagate’s 2012 Equity Incentive Plan and followed a four-year vesting schedule that completed through monthly vesting after September 9, 2021.
What does the Rule 10b5-1 trading plan mean for this Seagate (STX) Form 4?
The Rule 10b5-1 trading plan indicates Mosley’s sales were pre-arranged according to preset instructions. This structure helps separate routine liquidity or diversification from discretionary trading, so the timing of these Seagate share sales carries less informational weight about management’s short-term outlook.