Seagate Technology — Director's Dealing 2025

Jun 4, 2025

SEC Form 4/A — Form 4/A

Issuer: Seagate Technology Holdings plc (STX)
CIK: 0001137789
Period of Report: 2025-05-22

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-22	Ordinary Shares	M	50000	$54.78	Acquired	605677	Direct
2025-05-22	Ordinary Shares	S	1800	$105.9964	Disposed	603877	Direct
2025-05-22	Ordinary Shares	S	3828	$107.4298	Disposed	600049	Direct
2025-05-22	Ordinary Shares	S	7777	$108.0824	Disposed	592272	Direct
2025-05-22	Ordinary Shares	S	5195	$108.9424	Disposed	587077	Direct
2025-05-22	Ordinary Shares	S	51000	$110.0015	Disposed	536077	Direct
2025-05-22	Ordinary Shares	S	400	$111.06	Disposed	535677	Direct
2025-06-03	Ordinary Shares	M	50000	$54.78	Acquired	515677	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-05-22	NQ Stock Options	$54.78	M	50000	Disposed	2026-09-09	Ordinary Shares (50000)	Direct

Footnotes

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 20, 2025.

F2: These Ordinary Shares were sold in multiple trades at prices ranging from $105.66 to $106.50. 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.

F3: These Ordinary Shares were sold in multiple trades at prices ranging from $106.67 to $107.65. 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 $107.68 to $108.67. 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 $108.69 to $109.59. 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 $109.76 to $110.74. 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 $110.96 to $111.17. 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.

F8: Options granted to the Reporting Person under the Issuer's 2012 Equity Incentive Plan are subject to a four year vesting schedule. One quarter of the option shares vested on September 9, 2020. The remaining option shares vest in equal monthly installments over the 36 months following September 9, 2020.