Gianluca Romano - 11 Sep 2026 Form 4 Insider Report for Seagate Technology Holdings plc (STX)

Reporting relationship: EVP & CFO
Issuer ticker: STX
Reported as of: 11 Sep 2026
Net transaction value: -$4,677,037
SEC form: 4
Accepted by SEC: 15 Sep 2026, 16:15:52 UTC
Prior SEC filing: 11 Sep 2026
Next SEC filing: 16 Sep 2026
Source filing: View source filing
Reporting owner signature: /s/ Louis J. Thorson, Attorney-in-Fact for Gianluca Romano

Key filing fact

Gianluca Romano filed Form 4 for Seagate Technology Holdings plc (STX) on 15 Sep 2026.

Key facts

This page summarizes Gianluca Romano's Form 4 filing for Seagate Technology Holdings plc (STX).
17 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 15 Sep 2026, 16:15.

Change

Previous filing in this sequence was filed on 11 Sep 2026.
Current net transaction value: -$4,677,037.

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

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001764650 Primary reporting owner

Romano Gianluca

Relationship: EVP & CFO
Address: SEAGATE TECHNOLOGY HOLDINGS PLC, 47488 KATO ROAD, FREMONT
Signature: /s/ Louis J. Thorson, Attorney-in-Fact for Gianluca Romano
Signature date: 15 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

STX transaction

Ordinary Shares

Sale

Transaction value: $168,961
Shares: -200
Change %: -0.58%
Price: $844.81
Shares after: 34,020
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F2

STX transaction

Ordinary Shares

Sale

Transaction value: $169,388
Shares: -200
Change %: -0.59%
Price: $846.94
Shares after: 33,820
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F3

STX transaction

Ordinary Shares

Sale

Transaction value: $271,352
Shares: -320
Change %: -0.95%
Price: $847.98
Shares after: 33,500
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F4

STX transaction

Ordinary Shares

Sale

Transaction value: $475,739
Shares: -560
Change %: -1.7%
Price: $849.53
Shares after: 32,940
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F5

STX transaction

Ordinary Shares

Sale

Transaction value: $67,990
Shares: -80
Change %: -0.24%
Price: $849.87
Shares after: 32,860
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1

STX transaction

Ordinary Shares

Sale

Transaction value: $272,462
Shares: -320
Change %: -0.97%
Price: $851.44
Shares after: 32,540
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F6

STX transaction

Ordinary Shares

Sale

Transaction value: $545,838
Shares: -640
Change %: -2%
Price: $852.87
Shares after: 31,900
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F7

STX transaction

Ordinary Shares

Sale

Transaction value: $581,002
Shares: -680
Change %: -2.1%
Price: $854.41
Shares after: 31,220
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F8

STX transaction

Ordinary Shares

Sale

Transaction value: $205,373
Shares: -240
Change %: -0.77%
Price: $855.72
Shares after: 30,980
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F9

STX transaction

Ordinary Shares

Sale

Transaction value: $205,778
Shares: -240
Change %: -0.77%
Price: $857.41
Shares after: 30,740
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F10

STX transaction

Ordinary Shares

Sale

Transaction value: $240,932
Shares: -280
Change %: -0.91%
Price: $860.47
Shares after: 30,460
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F11

STX transaction

Ordinary Shares

Sale

Transaction value: $241,100
Shares: -280
Change %: -0.92%
Price: $861.07
Shares after: 30,180
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1

STX transaction

Ordinary Shares

Sale

Transaction value: $276,612
Shares: -320
Change %: -1.1%
Price: $864.41
Shares after: 29,860
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F12

STX transaction

Ordinary Shares

Sale

Transaction value: $208,423
Shares: -240
Change %: -0.8%
Price: $868.43
Shares after: 29,620
Date: 11 Sep 2026
Ownership: Direct
Footnotes: F1, F13

STX transaction

Ordinary Shares

Options Exercise

Transaction value
Shares: +1,695
Change %: +5.7%
Price: $0.000000^*
Shares after: 31,315
Date: 11 Sep 2026
Ownership: Direct

STX transaction

Ordinary Shares

Sale

Transaction value: $746,087
Shares: -955
Change %: -3%
Price: $781.24
Shares after: 30,360
Date: 14 Sep 2026
Ownership: Direct
Footnotes: F14

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

STX transaction Derivative

Restricted Share Unit

Options Exercise

Transaction value
Shares: -1,695
Change %: -20%
Price: $0.000000^*
Shares after: 6,780
Date: 11 Sep 2026
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 1,695
Exercise price: $0.000000
Footnotes: F15

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 15 footnotes

Footnote F1

This sale of Ordinary Shares was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 30, 2026

Footnote F2

These Ordinary Shares were sold in multiple trades at prices ranging from $844.72 to $845.15. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F3

These Ordinary Shares were sold in multiple trades at prices ranging from $846.84 to $847.62. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F4

These Ordinary Shares were sold in multiple trades at prices ranging from $847.87 to $848.01. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F5

These Ordinary Shares were sold in multiple trades at prices ranging from $848.87 to $849.84. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F6

These Ordinary Shares were sold in multiple trades at prices ranging from $851.22 to $851.52. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F7

These Ordinary Shares were sold in multiple trades at prices ranging from $852.41 to $853.19. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F8

These Ordinary Shares were sold in multiple trades at prices ranging from $853.77 to $854.64. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F9

These Ordinary Shares were sold in multiple trades at prices ranging from $855.21 to $856.07. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F10

These Ordinary Shares were sold in multiple trades at prices ranging from $857.23 to $857.76. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F11

These Ordinary Shares were sold in multiple trades at prices ranging from $860.06 to $861.02. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F12

These Ordinary Shares were sold in multiple trades at prices ranging from $864.2 to $865.05. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F13

These Ordinary Shares were sold in multiple trades at prices ranging from $867.77 to $868.76. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Footnote F14

Represents sales made pursuant to Issuer mandated sell-to-cover solely to satisfy tax withholding obligations.

Footnote F15

Consists of a grant of restricted share unit awarded to the reporting person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan. One-quarter of the shares vested on September 11, 2024 and the remaining portion shall vest in equal quarterly installments over the following three years for a total vesting period of four years.