STOCK TITAN

Seagate (NASDAQ: STX) CEO exercises RSUs and sells 2,854.75 shares

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Seagate Technology Holdings plc CEO William D. Mosley reported a mix of equity compensation exercises and share sales. On June 9, 2026, he exercised restricted share units into a total of 5,230 Ordinary Shares at a conversion price of $0.00 per share, reflecting RSUs awarded under the company’s 2022 Equity Incentive Plan that vest over four years. On June 10, 2026, he executed two open-market sales totaling 2,854.75 Ordinary Shares at prices of $821.7476 and $821.7410 per share. After these transactions, Mosley directly owned 324,869.5 Ordinary Shares.

Positive

  • None.

Negative

  • None.
Insider MOSLEY WILLIAM D
Role CEO
Sold 2,854.75 shs ($2.35M)
Type Security Shares Price Value
Sale Ordinary Shares 1,536.5 $821.741 $1.26M
Sale Ordinary Shares 1,318.25 $821.7476 $1.08M
Exercise Restricted Share Unit 2,815 $0.00 --
Exercise Restricted Share Unit 2,415 $0.00 --
Exercise Ordinary Shares 2,815 $0.00 --
Exercise Ordinary Shares 2,415 $0.00 --
Holdings After Transaction: Ordinary Shares — 324,869.5 shares (Direct, null); Restricted Share Unit — 2,815 shares (Direct, null)
Footnotes (1)
  1. Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). Subject to the Reporting Person's continuous employment, such RSUs vested as to one-quarter of the shares on September 9, 2023 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years. Consists of a grant of RSUs awarded to the Reporting Person under the 2022 Plan. Subject to the Reporting Person's continuous employment, such RSUs vested as to one-quarter of the shares on September 9, 2025 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years.
Shares sold 2,854.75 Ordinary Shares Open-market sales on June 10, 2026
Sale prices $821.7476 and $821.7410 per share Ordinary Shares sold on June 10, 2026
RSU shares exercised 5,230 Ordinary Shares RSU exercises on June 9, 2026
Conversion price $0.00 per share RSU exercises into Ordinary Shares
Shares owned after transactions 324,869.5 Ordinary Shares Direct ownership following June 10, 2026 sales
Exercise transactions 2 transactions, 5,230 shares Derivative exercise/conversion activity
Net buy/sell shares -2,854.75 shares Net sell direction across reported buy/sell activity
Restricted Share Unit financial
"Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan"
A restricted share unit (RSU) is a promise by a company to give an employee a set number of company shares at a future date, typically after meeting time or performance conditions. For investors, RSUs matter because when they convert into actual shares they increase the number of shares outstanding (like unlocking more tickets in a game), which can dilute existing holders, and they align employee incentives with company performance, influencing behavior and long-term value.
Equity Incentive Plan financial
"RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan"
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.
open-market sale financial
"transaction_action": "open-market sale""
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
derivative exercise/conversion financial
"transaction_action": "derivative exercise/conversion""
derivative security financial
"transaction_code_description": "Exercise or conversion of derivative security""
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
MOSLEY WILLIAM D

(Last)(First)(Middle)
SEAGATE TECHNOLOGY HOLDINGS PLC
47488 KATO ROAD

(Street)
FREMONT CALIFORNIA 94538

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Seagate Technology Holdings plc [ STX ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/09/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Ordinary Shares06/09/2026M2,815A$0326,406D
Ordinary Shares06/10/2026S1,536.5D$821.741324,869.5D
Ordinary Shares06/09/2026M2,415A$0327,284.5D
Ordinary Shares06/10/2026S1,318.25D$821.7476325,966.25D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Share Unit$006/09/2026M2,815 (1) (1)Ordinary Shares2,815$02,815D
Restricted Share Unit$006/09/2026M2,415 (2) (2)Ordinary Shares2,415$021,743D
Explanation of Responses:
1. Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan"). Subject to the Reporting Person's continuous employment, such RSUs vested as to one-quarter of the shares on September 9, 2023 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years.
2. Consists of a grant of RSUs awarded to the Reporting Person under the 2022 Plan. Subject to the Reporting Person's continuous employment, such RSUs vested as to one-quarter of the shares on September 9, 2025 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years.
Remarks:
/s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley06/11/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did Seagate (STX) CEO William Mosley report?

Seagate CEO William Mosley reported exercising restricted share units into 5,230 Ordinary Shares and selling 2,854.75 Ordinary Shares in open-market transactions. These moves reflect routine equity compensation activity combined with a relatively small share sale compared with his remaining direct holdings.

How many Seagate (STX) shares did the CEO sell in this Form 4?

William Mosley sold a total of 2,854.75 Ordinary Shares of Seagate in two open-market transactions. The shares were sold at prices of $821.7476 and $821.7410 per share, representing a modest portion of his overall direct ownership position.

What equity awards did the Seagate (STX) CEO exercise in this filing?

The CEO exercised Restricted Share Units converting into 5,230 Ordinary Shares at a $0.00 conversion price. These RSUs were granted under Seagate’s 2022 Equity Incentive Plan and vest over four years, with one-quarter vesting first and the remainder in equal quarterly installments.

How many Seagate (STX) shares does the CEO own after these transactions?

Following the reported transactions, William Mosley directly owns 324,869.5 Ordinary Shares of Seagate. This figure reflects both the RSU exercises and the subsequent open-market sales disclosed in the Form 4, providing a snapshot of his current direct equity stake.

Were the Seagate (STX) CEO’s transactions primarily sales or acquisitions?

The activity combines both acquisitions and sales. Mosley acquired 5,230 Ordinary Shares through RSU exercises and sold 2,854.75 Ordinary Shares in open-market trades, resulting in a net increase in his directly held Seagate share position based on the reported figures.