Key facts
- 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.
- Accepted by SEC: 23 Feb 2026, 17:20.
William D. Mosley - 20 Feb 2026 Form 4 Insider Report for Seagate Technology Holdings plc (STX)
- Reporting relationship
- CEO, Director
- Issuer ticker
- STX
- Reported as of
- 20 Feb 2026
- Net transaction value
- -$2,452,682
- SEC form
- 4
- Accepted by SEC
- 23 Feb 2026, 17:20:32 UTC
- Prior SEC filing
- 03 Feb 2026
- Next SEC filing
- 03 Mar 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
William D. Mosley filed Form 4 for Seagate Technology Holdings plc (STX) on 23 Feb 2026.
Change
- Previous filing in this sequence was filed on 03 Feb 2026.
- Current net transaction value: -$2,452,682.
Research use
- 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.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001388390
Primary reporting owner
MOSLEY WILLIAM D
- Relationship
- CEO, Director
- Address
- SEAGATE TECHNOLOGY HOLDINGS PLC, 47488 KATO ROAD, FREMONT
- Signature
- /s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley
- Signature date
- 23 Feb 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
STX
transaction
Ordinary Shares
Options Exercise
- Transaction value
- $0
- Shares
- +11,807
- Change %
- +2.9%
- Price
- $0.000000
- Shares after
- 421,863
- Date
- 20 Feb 2026
- Ownership
- Direct
STX
transaction
Ordinary Shares
Tax liability
- Transaction value
- $2,452,682
- Shares
- -5,966
- Change %
- -1.4%
- Price
- $411.11
- Shares after
- 415,897
- Date
- 20 Feb 2026
- Ownership
- Direct
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
STX
transaction
Derivative
Performance-Based Restricted Share Units
Options Exercise
- Transaction value
- $0
- Shares
- -11,807
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 20 Feb 2026
- Ownership
- Direct
- Underlying class
- Ordinary Shares
- Underlying amount
- 11,807
- Exercise price
- $0.000000
- Footnotes
- F1
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 1 footnote
Footnote F1
On January 24, 2026 the Compensation and People Committee of the Board of Directors of the Issuer determined that the performance conditions were met with respect to the 11,807 Performance Share Units granted on February 20, 2024. The 11,807 Ordinary Shares vested on February 20, 2026.