Seagate Technology — Director's Dealing 2025

Oct 3, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Seagate Technology Holdings plc (STX)
CIK: 0001137789
Period of Report: 2025-10-01

Reporting Person: MOSLEY WILLIAM D (Director, CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-10-01	Ordinary Shares	S	600	$234.0867	Disposed	505068	Direct
2025-10-01	Ordinary Shares	S	200	$235.24	Disposed	504868	Direct
2025-10-01	Ordinary Shares	S	400	$236.375	Disposed	504468	Direct
2025-10-01	Ordinary Shares	S	500	$237.826	Disposed	503968	Direct
2025-10-01	Ordinary Shares	S	300	$238.7967	Disposed	503668	Direct
2025-10-01	Ordinary Shares	S	500	$240.0192	Disposed	503168	Direct
2025-10-01	Ordinary Shares	S	400	$241.50	Disposed	502768	Direct
2025-10-01	Ordinary Shares	S	500	$243.428	Disposed	502268	Direct
2025-10-01	Ordinary Shares	S	1400	$245.24	Disposed	500868	Direct
2025-10-01	Ordinary Shares	S	1400	$245.9393	Disposed	499468	Direct
2025-10-01	Ordinary Shares	S	700	$247.1986	Disposed	498768	Direct
2025-10-01	Ordinary Shares	S	800	$248.3014	Disposed	497968	Direct
2025-10-01	Ordinary Shares	S	1500	$249.416	Disposed	496468	Direct
2025-10-01	Ordinary Shares	S	1004	$250.43	Disposed	495464	Direct
2025-10-01	Ordinary Shares	S	700	$252.0314	Disposed	494764	Direct
2025-10-01	Ordinary Shares	S	800	$252.4525	Disposed	493964	Direct
2025-10-01	Ordinary Shares	S	1900	$253.7628	Disposed	492064	Direct
2025-10-01	Ordinary Shares	S	500	$254.65	Disposed	491564	Direct
2025-10-01	Ordinary Shares	S	1011	$255.6897	Disposed	490553	Direct
2025-10-01	Ordinary Shares	S	3885	$256.8806	Disposed	486668	Direct
2025-10-01	Ordinary Shares	S	1000	$257.827	Disposed	485668	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 $233.76 to $234.40. 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 $234.91 to $235.57. 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 $236.09 to $236.73. 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 $237.45 to $238.41. 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 $238.67 to $238.91. 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 $239.73 to $240.24. 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 $241.08 to $241.70. 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 $242.99 to $243.88. 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 $244.60 to $245.59. 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.

F11: These Ordinary Shares were sold in multiple trades at prices ranging from $245.60 to $246.40. 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 $246.76 to $247.66. 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 $247.86 to $248.84. 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 $248.91 to $249.82. 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 $249.94 to $250.89. 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.

F16: These Ordinary Shares were sold in multiple trades at prices ranging from $251.27 to $252.23. 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.

F17: These Ordinary Shares were sold in multiple trades at prices ranging from $252.34 to $252.67. 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.

F18: These Ordinary Shares were sold in multiple trades at prices ranging from $253.38 to $254.23. 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.

F19: These Ordinary Shares were sold in multiple trades at prices ranging from $254.40 to $254.95. 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.

F20: These Ordinary Shares were sold in multiple trades at prices ranging from $255.49 to $256.38. 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.

F21: These Ordinary Shares were sold in multiple trades at prices ranging from $256.50 to $257.36. 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.

F22: These Ordinary Shares were sold in multiple trades at prices ranging from $257.56 to $258.15. 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.