144 0001987421 XXXXXXXX LIVE 0001137789 Seagate Technology Holdings plc 001-31560 121 WOODLANDS AVENUE 5 SINGAPORE U0 739009 65 6412 5172 Chong Kian Fatt Officer COMMON MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES

1 NEW YORK PLAZA, 8TH FLOOR NEW YORK NY 10004

6410 713148.14 212217463 05/22/2025 NASDAQ COMMON 01/31/2025 ESPP ISSUER N 224 01/31/2025 CASH COMMON 02/20/2025 PERFORMANCE SHARES ISSUER N 4428 02/20/2025 NOT APPLICABLE COMMON 12/11/2024 RESTRICTED STOCK ISSUER N 678 12/11/2024 NOT APPLICABLE COMMON 03/11/2025 RESTRICTED STOCK ISSUER N 678 03/11/2025 NOT APPLICABLE COMMON 03/09/2025 RESTRICTED STOCK ISSUER N 201 03/09/2025 NOT APPLICABLE COMMON 12/09/2024 RESTRICTED STOCK ISSUER N 201 12/09/2024 NOT APPLICABLE Y 05/22/2025 /s/ Kian Fatt Chong