Gianluca Romano - 09 Sep 2025 Form 4 Insider Report for Seagate Technology Holdings plc (STX)

Role: EVP & CFO
Signature: /s/ Louis J. Thorson, Attorney-in-Fact for Gianluca Romano
Issuer symbol: STX
Transactions as of: 09 Sep 2025
Net transactions value: -$1,266,027
Form type: 4
Filing time: 11 Sep 2025, 16:05:39 UTC
Previous filing: 22 Aug 2025
Next filing: 15 Sep 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Romano Gianluca	EVP & CFO	SEAGATE TECHNOLOGY HOLDINGS PLC, 47488 KATO ROAD, FREMONT	/s/ Louis J. Thorson, Attorney-in-Fact for Gianluca Romano	11 Sep 2025	0001764650

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	STX	Ordinary Shares	Options Exercise	$0	+3,017	+7.6%	$0.000000	42,524	09 Sep 2025	Direct	F1
transaction	STX	Ordinary Shares	Tax liability	$292,175	-1,525	-3.6%	$191.59	40,999	09 Sep 2025	Direct
transaction	STX	Ordinary Shares	Options Exercise	$0	+958	+2.3%	$0.000000	41,957	09 Sep 2025	Direct
transaction	STX	Ordinary Shares	Tax liability	$92,921	-485	-1.2%	$191.59	41,472	09 Sep 2025	Direct
transaction	STX	Ordinary Shares	Options Exercise	$0	+6,062	+15%	$0.000000	47,534	09 Sep 2025	Direct
transaction	STX	Ordinary Shares	Tax liability	$587,032	-3,064	-6.4%	$191.59	44,470	09 Sep 2025	Direct
transaction	STX	Ordinary Shares	Options Exercise	$0	+3,035	+6.8%	$0.000000	47,505	09 Sep 2025	Direct
transaction	STX	Ordinary Shares	Tax liability	$293,899	-1,534	-3.2%	$191.59	45,971	09 Sep 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	Restricted Share Unit	Options Exercise	$0	-3,017	-100%	$0.000000	0	09 Sep 2025	Ordinary Shares	3,017	$0.000000	Direct	F2
transaction	STX	Restricted Share Unit	Options Exercise	$0	-958	-20%	$0.000000	3,834	09 Sep 2025	Ordinary Shares	958	$0.000000	Direct	F3
transaction	STX	Restricted Share Unit	Options Exercise	$0	-6,062	-25%	$0.000000	18,188	09 Sep 2025	Ordinary Shares	6,062	$0.000000	Direct	F4
transaction	STX	Restricted Share Unit	Options Exercise	$0	-3,035	-100%	$0.000000	0	09 Sep 2025	Ordinary Shares	3,035	$0.000000	Direct	F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes 114 Ordinary Shares purchased by Reporting Person on July 31, 2025 under the Issuer's Employee Stock Purchase Plan. Such acquisition is exempt from reporting pursuant to Rule 16b-3 under the Securities Exchange Act of 1934.
F2	Consists of a grant of RSUs awarded to the Reporting Person under 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.