William D. Mosley - 11 Mar 2026 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 Mar 2026
Net transactions value
$0
Form type
4
Filing time
12 Mar 2026, 16:11:19 UTC
Previous filing
11 Mar 2026
Next filing
23 Mar 2026
SEC
View on sec.gov

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Quoteable Key Fact

"William D. Mosley filed Form 4 for Seagate Technology Holdings plc (STX) on 12 Mar 2026."

Quick Takeaways

  • This page summarizes William D. Mosley's Form 4 filing for Seagate Technology Holdings plc (STX).
  • 3 reported transactions and 1 derivative row are listed below.
  • Filing timestamp: 12 Mar 2026, 16:11.

What Changed

  • Previous filing in this sequence was filed on 11 Mar 2026.
  • Current net transaction value: $0.

Why This Matters

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Official SEC Source

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

See Original Filing

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 Mar 2026 0001388390

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction STX Ordinary Shares Options Exercise +3,319 +0.83% $0.000000* 401,833 11 Mar 2026 Direct
transaction STX Ordinary Shares Tax liability -1,658 -0.41% $385.97* 400,175 11 Mar 2026 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 -3,319 -14% $0.000000* 19,914 11 Mar 2026 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.

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