Seagate Technology — Director's Dealing 2025

Jun 10, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology Holdings plc (STX)
CIK: 0001137789
Period of Report: 2025-06-09

Reporting Person: MOSLEY WILLIAM D (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-06-09	Ordinary Shares	M	54347	$54.78	Acquired	570024	Direct
2025-06-09	Ordinary Shares	S	54347	$130.1898	Disposed	515677	Direct
2025-06-09	Ordinary Shares	M	2814	—	Acquired	518491	Direct
2025-06-09	Ordinary Shares	F	1422	$130.17	Disposed	517069	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-06-09	NQ Options	$54.78	M	54347	Disposed	2026-09-09	Ordinary Shares (54347)	Direct
2025-06-09	Restricted Share Unit	$	M	2814	Disposed		Ordinary Shares (2814)	Direct

Footnotes

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.