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Seagate Technology Holdings plc planned insider sales

In the twelve months since 23 September 2025 insiders at Seagate Technology Holdings plc filed 72 Form 144 notices of planned sales, 929,535 shares worth $626.3 million at the time of filing, from 17 sellers. The latest, filed 21 September 2026: John C Morris (officer), 14,849 shares worth $12.8 million, planned for around 21 September 2026 through Morgan Stanley Smith Barney LLC Executive Financial Services.

FiledSellerRelationshipSharesValuePlanned saleBrokerHow acquiredFiling
21 September 2026John C MorrisOfficer14,849$12.8 million21 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock Options; Performance Stock Units; Restricted Stock UnitsForm 144
15 September 2026Morris John ChristopherOfficer16,239$12.5 million15 September 2026Morgan StanleyPerformance Share Unit VestingForm 144
15 September 2026Romano GianlucaOfficer52,483$40.5 million15 September 2026Morgan StanleyPerformance Share Unit VestingForm 144
15 September 2026Ban Seng TehOfficer52,730$41.2 million15 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance SharesForm 144
15 September 2026Mosley William DOfficer, Director102,784$79.4 million15 September 2026Morgan StanleyPerformance Share Unit VestingForm 144
14 September 2026Morris John ChristopherOfficer518$404,40514 September 2026Morgan StanleyRestricted Stock Unit VestingForm 144
14 September 2026Ban Seng TehOfficer989$770,43114 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
14 September 2026Romano GianlucaOfficer1,003$783,39114 September 2026Morgan StanleyRestricted Stock Unit VestingForm 144
14 September 2026Mosley William DOfficer, Director1,963$1.5 million14 September 2026Morgan StanleyRestricted Stock Unit VestingForm 144
11 September 2026Gianluca RomanoOfficer50,498$43.5 million11 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
10 September 2026Morris John ChristopherOfficer601$518,02210 September 2026Morgan StanleyRestricted Stock Unit VestingForm 144
10 September 2026Ban Seng TehOfficer663$570,24010 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
10 September 2026Romano GianlucaOfficer1,415$1.2 million10 September 2026Morgan StanleyRestricted Stock Unit VestingForm 144
10 September 2026Mosley William DOfficer, Director2,992$2.6 million10 September 2026Morgan StanleyRestricted Stock Unit VestingForm 144
1 September 2026Yolanda ConyersDirector750$621,2851 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
1 September 2026William D. MosleyDirector, Officer90,000$74.6 million1 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock Options; Restricted and Performance Stock UnitsForm 144
24 August 2026James LeeOfficer9,013$7.7 million24 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock Options; Restricted Stock UnitsForm 144
21 August 2026Morris John ChristopherOfficer3,575$3.0 million21 August 2026Morgan StanleyRestricted Stock Unit VestingForm 144
21 August 2026Lee James CIOfficer4,000$3.4 million21 August 2026Morgan StanleyRestricted Stock Unit VestingForm 144
21 August 2026Romano GianlucaOfficer9,135$7.8 million21 August 2026Morgan StanleyRestricted Stock Unit VestingForm 144
21 August 2026Ban Seng TehOfficer9,862$8.4 million21 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
21 August 2026Mosley William DOfficer, Director18,200$15.5 million21 August 2026Morgan StanleyRestricted Stock Unit VestingForm 144
20 August 2026John MorrisOfficer523$435,42920 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
20 August 2026Ban Seng TehOfficer6,048$5.1 million20 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
13 August 2026Ban Seng TehOfficer7,361$6.8 million13 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesEmployee Stock Purchase Plan; Restricted Stock; Stock Option ExerciseForm 144
7 August 2026Gianluca RomanoOfficer22,211$18.9 million7 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock units and performance stock unitsForm 144
30 July 2026James LeeOfficer694$530,51430 July 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
23 July 2026Lee James CIOfficer543$490,74123 July 2026Morgan StanleyRestricted Stock Unit VestingForm 144
12 June 2026Morris John ChristopherOfficer466$404,53012 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Unit VestingForm 144
12 June 2026Romano GianlucaOfficer904$784,75312 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Unit VestingForm 144
12 June 2026Ban Seng TehOfficer989$870,50812 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
12 June 2026Mosley William DOfficer, Director1,769$1.5 million12 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Unit VestingForm 144
11 June 2026Romano GianlucaOfficer1,351$1.2 million10 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Unit VestingForm 144
11 June 2026Mosley William DOfficer, Director2,855$2.5 million10 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Unit VestingForm 144
10 June 2026Morris John ChristopherOfficer574$503,26610 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Unit VestingForm 144
10 June 2026Ban Seng TehOfficer663$544,89310 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
4 June 2026Shankar ArumugaveluDirector1,000$927,6804 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
2 June 2026Pratik BhattDirector1,000$921,2602 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
1 June 2026William D. MosleyDirector, Officer90,000$79.2 million1 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesEmployee Stock Purchase Plan; Exercise of Stock Options; Restricted and Performance Stock UnitsForm 144
20 May 2026William D. MosleyDirector, Officer30,000$22.0 million20 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock Options; RSU & PSUsForm 144
14 May 2026Ban Seng TehOfficer8,003$6.5 million14 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
13 May 2026Ban Seng TehOfficer7,557$6.1 million13 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance and Restricted StockForm 144
6 May 2026Gianluca RomanoOfficer24,390$18.8 million6 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock Units; Restricted Stock UnitsForm 144
5 May 2026Stephanie TileniusDirector1,580$1.2 million5 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
4 May 2026James LeeOfficer697$506,6704 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
4 May 2026John MorrisOfficer6,692$4.9 million4 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesEmployee Stock Purchase Plan; Performance Stock Units; Restricted Stock UnitsForm 144
1 April 2026William MosleyDirector, Officer20,000$7.8 million1 April 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesEmployee Stock Purchase Plan; Performance Stock Units; Restricted Stock UnitsForm 144
13 March 2026John MorrisOfficer112$41,88613 March 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
2 March 2026Yolanda ConyersDirector1,500$611,7602 March 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
2 March 2026William MosleyDirector, Officer20,000$8.2 million2 March 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock UnitsForm 144
24 February 2026John MorrisOfficer240$97,77624 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock UnitsForm 144
23 February 2026Kian Fatt ChongOfficer5,846$2.4 million23 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesEmployee Stock Purchase Plan; Performance Shares; Restricted StockForm 144
2 February 2026William MosleyDirector, Officer20,000$8.2 million2 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted and Performance Stock UnitsForm 144
29 January 2026Ban Seng TehOfficer20,195$8.9 million29 January 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesEmployee Stock Purchase Plan; Performance Shares; Restricted Stock; Stock Option ExerciseForm 144
26 January 2026James LeeOfficer673$232,92526 January 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
12 January 2026Ban Seng TehOfficer1,412$422,62612 January 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
2 January 2026William MosleyDirector, Officer20,000$5.5 million2 January 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock Units; Restricted Stock UnitsForm 144
15 December 2025John MorrisOfficer113$32,50315 December 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
11 December 2025Ban Seng TehOfficer2,010$594,75911 December 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock; Stock Option ExerciseForm 144
2 December 2025Yolanda ConyersDirector750$202,5752 December 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
1 December 2025William MosleyDirector, Officer20,000$5.5 million1 December 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRSUs/PSUsForm 144
12 November 2025James LeeOfficer697$204,91111 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
12 November 2025Ban Seng TehOfficer1,412$408,04011 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
12 November 2025Gianluca RomanoOfficer62,023$17.9 million12 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock Options; Performance Stock Units; Restricted Stock UnitsForm 144
10 November 2025Shankar ArumugaveluDirector5,000$1.5 million10 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
5 November 2025Ban Seng TehOfficer6,000$1.6 million5 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance SharesForm 144
3 November 2025Stephanie TileniusDirector2,046$545,0843 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
3 November 2025William MosleyDirector, Officer20,000$5.1 million3 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock UnitsForm 144
31 October 2025Bruner JudyDirector8,886$2.4 million31 October 2025Fidelity Brokerage Services LLCStock AwardForm 144
30 October 2025Kian Fatt ChongOfficer7,078$1.9 million30 October 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesEmployee Stock Purchase Plan; Performance Shares; Restricted StockForm 144
14 October 2025Ban Seng TehOfficer1,410$318,04013 October 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
1 October 2025William MosleyDirector, Officer20,000$4.7 million1 October 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRSUs/PSUsForm 144

A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was. Value is the filer's own aggregate market value. Whether the sale happened shows up later on Form 4, on the insiders page.

Source

Form 144 filings on EDGAR for Seagate Technology Holdings plc: the company's filing index, each notice read from its own XML.

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