Seagate Technology — Director's Dealing 2025

Sep 11, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

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

Reporting Person: Teh Ban Seng (EVP & Chief Commercial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-09-09	Ordinary Shares	M	1408	—	Acquired	7555	Direct
2025-09-09	Ordinary Shares	M	599	—	Acquired	8154	Direct
2025-09-09	Ordinary Shares	M	2652	—	Acquired	10806	Direct
2025-09-09	Ordinary Shares	M	1165	—	Acquired	11971	Direct
2025-09-10	Ordinary Shares	S	6781	$191.53	Disposed	5190	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-09-09	Restricted Share Unit	$0	M	1408	Disposed		Ordinary Shares (1408)	Direct
2025-09-09	Restricted Share Unit	$0	M	599	Disposed		Ordinary Shares (599)	Direct
2025-09-09	Restricted Share Unit	$0	M	2652	Disposed		Ordinary Shares (2652)	Direct
2025-09-09	Restricted Share Unit	$0	M	1165	Disposed		Ordinary Shares (1165)	Direct

Footnotes

F1: These Ordinary Shares were sold in multiple trades at prices ranging from $191.53 to $191.54. 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.

F2: Consists of a grant of RSUs awarded to the Reporting Person under the Seagate Technology plc Equity Incentive Plan (the "Plan"). Subject to the Reporting Person's continuous employment, one-quarter of the shares vested on September 9, 2022 and each one-year anniversary thereafter for a total vesting period of four years.

F3: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, one-quarter of the shares vested 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.

F4: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, one-quarter of the shares vested 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.

F5: Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Such RSUs vested 100% on September 9, 2025, the first anniversary of the grant.