WILLIAM D. MOSLEY - 11 Dec 2025 Form 4 Insider Report for Seagate Technology Holdings plc (STX)

Role
CEO, Director
Signature
/s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley
Issuer symbol
STX
Transactions as of
11 Dec 2025
Net transactions value
-$516,564
Form type
4
Filing time
12 Dec 2025, 16:17:41 UTC
Previous filing
11 Dec 2025
Next filing
06 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
MOSLEY WILLIAM D CEO, Director SEAGATE TECHNOLOGY HOLDINGS PLC, 47488 KATO ROAD, FREMONT /s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley 12 Dec 2025 0001388390

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction STX Ordinary Shares Options Exercise $0 +3,319 +0.74% $0.000000 451,573 11 Dec 2025 Direct
transaction STX Ordinary Shares Tax liability $516,564 -1,678 -0.37% $307.84 449,895 11 Dec 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 -3,319 -12% $0.000000 23,233 11 Dec 2025 Ordinary Shares 3,319 $0.000000 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Consists of a grant of restricted share unit awarded to the reporting person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan. Subject to the Reporting Person's continuous employment, one-quarter vested starting on September 11, 2024 and then in equal quarterly installments over the following three years for a total vesting period of four years.