John C. Morris - 21 Sep 2026 Form 4 Insider Report for Seagate Technology Holdings plc (STX)

Reporting relationship: EVP & CTO
Issuer ticker: STX
Reported as of: 21 Sep 2026
Net transaction value: -$8,211,951
SEC form: 4
Accepted by SEC: 22 Sep 2026, 16:49:47 UTC
Prior SEC filing: 16 Sep 2026
Source filing: View source filing
Reporting owner signature: /s/ Louis J. Thorson, Attorney-in-Fact for John C. Morris

Key filing fact

John C. Morris filed Form 4 for Seagate Technology Holdings plc (STX) on 22 Sep 2026.

Key facts

This page summarizes John C. Morris's Form 4 filing for Seagate Technology Holdings plc (STX).
28 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 22 Sep 2026, 16:49.

Change

Previous filing in this sequence was filed on 16 Sep 2026.
Current net transaction value: -$8,211,951.

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 0001988271 Primary reporting owner

Morris John Christopher

Relationship: EVP & CTO
Address: SEAGATE TECHNOLOGY PLC, 47488 KATO ROAD, FREMONT
Signature: /s/ Louis J. Thorson, Attorney-in-Fact for John C. Morris
Signature date: 22 Sep 2026

Reported non-derivative transactions

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

STX transaction

Ordinary Shares

Options Exercise

Transaction value
Shares: +915
Change %: +2.9%
Price: $158.40^*
Shares after: 32,047
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F1

STX transaction

Ordinary Shares

Sale

Transaction value: $34,546
Shares: -40
Change %: -0.12%
Price: $863.66
Shares after: 32,007
Date: 21 Sep 2026
Ownership: Direct

STX transaction

Ordinary Shares

Sale

Transaction value: $69,209
Shares: -80
Change %: -0.25%
Price: $865.11
Shares after: 31,927
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F2

STX transaction

Ordinary Shares

Sale

Transaction value: $34,632
Shares: -40
Change %: -0.13%
Price: $865.80
Shares after: 31,887
Date: 21 Sep 2026
Ownership: Direct

STX transaction

Ordinary Shares

Sale

Transaction value: $138,897
Shares: -160
Change %: -0.5%
Price: $868.11
Shares after: 31,727
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F3

STX transaction

Ordinary Shares

Sale

Transaction value: $69,537
Shares: -80
Change %: -0.25%
Price: $869.21
Shares after: 31,647
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F4

STX transaction

Ordinary Shares

Sale

Transaction value: $174,056
Shares: -200
Change %: -0.63%
Price: $870.28
Shares after: 31,447
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F5

STX transaction

Ordinary Shares

Sale

Transaction value: $453,212
Shares: -520
Change %: -1.7%
Price: $871.56
Shares after: 30,927
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F6

STX transaction

Ordinary Shares

Sale

Transaction value: $872,424
Shares: -1,000
Change %: -3.2%
Price: $872.42
Shares after: 29,927
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F7

STX transaction

Ordinary Shares

Sale

Transaction value: $908,431
Shares: -1,040
Change %: -3.5%
Price: $873.49
Shares after: 28,887
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F8

STX transaction

Ordinary Shares

Sale

Transaction value: $862,261
Shares: -986
Change %: -3.4%
Price: $874.50
Shares after: 27,901
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F9

STX transaction

Ordinary Shares

Sale

Transaction value: $852,590
Shares: -974
Change %: -3.5%
Price: $875.35
Shares after: 26,927
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F10

STX transaction

Ordinary Shares

Sale

Transaction value: $666,174
Shares: -760
Change %: -2.8%
Price: $876.54
Shares after: 26,167
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F11

STX transaction

Ordinary Shares

Sale

Transaction value: $366,738
Shares: -418
Change %: -1.6%
Price: $877.36
Shares after: 25,749
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F12

STX transaction

Ordinary Shares

Sale

Transaction value: $245,945
Shares: -280
Change %: -1.1%
Price: $878.38
Shares after: 25,469
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F13

STX transaction

Ordinary Shares

Sale

Transaction value: $175,942
Shares: -200
Change %: -0.79%
Price: $879.71
Shares after: 25,269
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F14

STX transaction

Ordinary Shares

Sale

Transaction value: $652,938
Shares: -741
Change %: -2.9%
Price: $881.16
Shares after: 24,528
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F15

STX transaction

Ordinary Shares

Sale

Transaction value: $176,380
Shares: -200
Change %: -0.82%
Price: $881.90
Shares after: 24,328
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F16

STX transaction

Ordinary Shares

Sale

Transaction value: $282,585
Shares: -320
Change %: -1.3%
Price: $883.08
Shares after: 24,008
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F17

STX transaction

Ordinary Shares

Sale

Transaction value: $35,451
Shares: -40
Change %: -0.17%
Price: $886.27
Shares after: 23,968
Date: 21 Sep 2026
Ownership: Direct

STX transaction

Ordinary Shares

Sale

Transaction value: $106,550
Shares: -120
Change %: -0.5%
Price: $887.92
Shares after: 23,848
Date: 21 Sep 2026
Ownership: Direct
Footnotes: F18

STX transaction

Ordinary Shares

Sale

Transaction value: $35,622
Shares: -40
Change %: -0.17%
Price: $890.54
Shares after: 23,808
Date: 21 Sep 2026
Ownership: Direct

STX transaction

Ordinary Shares

Sale

Transaction value: $35,726
Shares: -40
Change %: -0.17%
Price: $893.15
Shares after: 23,768
Date: 21 Sep 2026
Ownership: Direct

STX transaction

Ordinary Shares

Sale

Transaction value: $818,257
Shares: -915
Change %: -3.8%
Price: $894.27
Shares after: 22,853
Date: 21 Sep 2026
Ownership: Direct

STX transaction

Ordinary Shares

Sale

Transaction value: $71,782
Shares: -80
Change %: -0.35%
Price: $897.28
Shares after: 22,773
Date: 21 Sep 2026
Ownership: Direct

STX transaction

Ordinary Shares

Sale

Transaction value: $35,981
Shares: -40
Change %: -0.18%
Price: $899.53
Shares after: 22,733
Date: 21 Sep 2026
Ownership: Direct

STX transaction

Ordinary Shares

Sale

Transaction value: $36,083
Shares: -40
Change %: -0.18%
Price: $902.07
Shares after: 22,693
Date: 21 Sep 2026
Ownership: Direct

Reported derivative securities

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

STX transaction Derivative

NQ Stock Option

Options Exercise

Transaction value
Shares: -915
Change %: -5%
Price: $0.000000^*
Shares after: 17,378
Date: 21 Sep 2026
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 915
Exercise price: $158.40
Footnotes: F19

^* 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 19 footnotes

Footnote F1

All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on January 29, 2026.

Footnote F2

These Ordinary Shares were sold in multiple trades at prices ranging from $864.79 to $865.43. 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 $867.77 to $868.44. 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 $868.79 to $869.47. 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 $869.82 to $870.80. 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 $870.89 to $871.77. 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 $871.91 to $872.90. 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 $872.94 to $873.93. 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 $873.96 to $874.94. 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 $874.98 to $875.96. 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 $875.99 to $876.93. 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 $876.99 to $877.76. 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 F13

These Ordinary Shares were sold in multiple trades at prices ranging from $878.01 to $878.82. 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

These Ordinary Shares were sold in multiple trades at prices ranging from $879.58 to $879.90. 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 F15

These Ordinary Shares were sold in multiple trades at prices ranging from $880.62 to $881.54. 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 F16

These Ordinary Shares were sold in multiple trades at prices ranging from $881.65 to $882.17. 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 F17

These Ordinary Shares were sold in multiple trades at prices ranging from $882.78 to $883.77. 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 F18

These Ordinary Shares were sold in multiple trades at prices ranging from $887.75 to $888.25. 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 F19

Options granted to the Reporting Person under the Seagate Technology plc 2022 Equity Incentive Plan (the "2022 Plan") are subject to a four-year vesting schedule. Subject to continuous employment, one-quarter vested on August 20, 2026 and the remaining portion shall vest in equal monthly installments over the following three years for a total vesting period of four years.