WILLIAM D. MOSLEY - 09 Jun 2025 Form 4 Insider Report for Seagate Technology Holdings plc (STX)

Role
Chief Executive Officer, Director
Signature
/s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley
Issuer symbol
STX
Transactions as of
09 Jun 2025
Net transactions value
-$4,283,398
Form type
4
Filing time
10 Jun 2025, 17:00:48 UTC
Previous filing
04 Jun 2025
Next filing
12 Jun 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
MOSLEY WILLIAM D Chief Executive Officer, Director SEAGATE TECHNOLOGY HOLDINGS PLC, 47488 KATO ROAD, FREMONT /s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley 10 Jun 2025 0001388390

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction STX Ordinary Shares Options Exercise $2,977,129 +54,347 +11% $54.78 570,024 09 Jun 2025 Direct F1
transaction STX Ordinary Shares Sale $7,075,425 -54,347 -9.5% $130.19 515,677 09 Jun 2025 Direct F1
transaction STX Ordinary Shares Options Exercise $0 +2,814 +0.55% $0.000000 518,491 09 Jun 2025 Direct
transaction STX Ordinary Shares Tax liability $185,102 -1,422 -0.27% $130.17 517,069 09 Jun 2025 Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction STX NQ Options Options Exercise $0 -54,347 -100% $0.000000 0 09 Jun 2025 Ordinary Shares 54,347 $54.78 Direct F2
transaction STX Restricted Share Unit Options Exercise $0 -2,814 -17% $0.000000 14,075 09 Jun 2025 Ordinary Shares 2,814 Direct F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 The option exercise and sale of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 20, 2025.
F2 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 will vest on September 9, 2020. The remaining option shares will vest in equal monthly installments over the 36 months following September 9, 2020.
F3 Each restricted share unit ("RSU") represents a contingent right to receive one Ordinary Share of the Issuer.
F4 Consists of a grant of RSUs awarded to the reporting person under the Seagate Technology plc 2022 Equity Incentive Plan subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter vested starting on September 9, 2023 and then in equal quarterly installments thereafter.