WILLIAM D. MOSLEY - 11 Sep 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 Sep 2025
Transactions value $
-$6,784,394
Form type
4
Filing time
15 Sep 2025, 18:11:06 UTC
Previous filing
11 Sep 2025
Next filing
03 Oct 2025
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 15 Sep 2025 0001388390

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction STX Ordinary Shares Options Exercise $0 +3.32K +0.7% $0.00 475K 11 Sep 2025 Direct
transaction STX Ordinary Shares Tax liability -$330K -1.68K -0.35% $196.81 473K 11 Sep 2025 Direct
transaction STX Ordinary Shares Options Exercise $0 +65.2K +13.77% $0.00 539K 14 Sep 2025 Direct
transaction STX Ordinary Shares Tax liability -$6.45M -32.9K -6.11% $195.99 506K 14 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 -3.32K -11.11% $0.00 26.6K 11 Sep 2025 Ordinary Shares 3.32K $0.00 Direct F1
transaction STX Performance-Based Restricted Share Units Award $0 +65.2K $0.00 65.2K 14 Sep 2025 Ordinary Shares 65.2K $0.00 Direct F2
transaction STX Performance-Based Restricted Share Units Options Exercise $0 -65.2K -100% $0.00 0 14 Sep 2025 Ordinary Shares 65.2K $0.00 Direct F2
* 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 units awarded to the reporting person under the Seagate Technology 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.
F2 On September 14, 2025, the Compensation Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to 65,170 of the 75,045 Performance Share Units granted on September 9, 2022. The 65,170 Ordinary Shares vested on September 14, 2025.