Seagate Technology — Director's Dealing 2026

Feb 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology Holdings plc (STX)
CIK: 0001137789
Period of Report: 2026-02-02

Reporting Person: MOSLEY WILLIAM D (Director, CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-02	Ordinary Shares	S	100	$401.10	Disposed	429956	Direct
2026-02-02	Ordinary Shares	S	100	$403.47	Disposed	429856	Direct
2026-02-02	Ordinary Shares	S	100	$411.90	Disposed	429756	Direct
2026-02-02	Ordinary Shares	S	200	$419.77	Disposed	429556	Direct
2026-02-02	Ordinary Shares	S	200	$421.165	Disposed	429356	Direct
2026-02-02	Ordinary Shares	S	400	$423.0125	Disposed	428956	Direct
2026-02-02	Ordinary Shares	S	875	$424.4963	Disposed	428081	Direct
2026-02-02	Ordinary Shares	S	978	$425.6888	Disposed	427103	Direct
2026-02-02	Ordinary Shares	S	1900	$427.0647	Disposed	425203	Direct
2026-02-02	Ordinary Shares	S	2283	$427.9956	Disposed	422920	Direct
2026-02-02	Ordinary Shares	S	1564	$429.0908	Disposed	421356	Direct
2026-02-02	Ordinary Shares	S	1800	$430.1423	Disposed	419556	Direct
2026-02-02	Ordinary Shares	S	3725	$431.2729	Disposed	415831	Direct
2026-02-02	Ordinary Shares	S	3875	$432.1884	Disposed	411956	Direct
2026-02-02	Ordinary Shares	S	1600	$433.2234	Disposed	410356	Direct
2026-02-02	Ordinary Shares	S	300	$434.3067	Disposed	410056	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: Includes 161 Ordinary Shares purchased by Reporting Person on January 31, 2026 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.

F3: These Ordinary Shares were sold in multiple trades at prices ranging from $419.29 to $420.25. 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 $420.96 to $421.37. 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 $422.88 to $423.23. 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 $424.11 to $424.81. 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 $425.26 to $426.20. 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: These Ordinary Shares were sold in multiple trades at prices ranging from $426.60 to $427.55. 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.

F9: These Ordinary Shares were sold in multiple trades at prices ranging from $427.60 to $428.56. 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.

F10: These Ordinary Shares were sold in multiple trades at prices ranging from $428.61 to $429.60. 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.

F11: These Ordinary Shares were sold in multiple trades at prices ranging from $429.63 to $430.58. 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.

F12: These Ordinary Shares were sold in multiple trades at prices ranging from $430.70 to $431.67. 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.

F13: These Ordinary Shares were sold in multiple trades at prices ranging from $431.74 to $432.67. 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.

F14: These Ordinary Shares were sold in multiple trades at prices ranging from $432.93 to $433.89. 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.

F15: These Ordinary Shares were sold in multiple trades at prices ranging from $433.96 to $434.48. 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.