MOSLEY WILLIAM D (CEO) sold 4.0% of their position (12.92K shares) of SEAGATE TECHNOLOGY HOLDINGS PLC on the open market

Open‑market sale worth $10.38M — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 29 sales

MOSLEY WILLIAM D

Filed: 8/4/2026ACC: 0001137789-26-000163

InsiderMOSLEY WILLIAM DCIK 1388390

→

IssuerSEAGATE TECHNOLOGY HOLDINGS PLCCIK 1137789

DirectorOfficer· CEO

Since Mar 2026

-12.92K

Net shares

Net seller

$10.38M

Total sold

Open market trades

0B · 29S

Total transactions

14K acquired · 26.92K disposed

Non-Derivative Transactions30

Ordinary Shares

Direct

M · Option Exercise

+14K

Price / share

$46.23

Trade value

$647.22K

% of position

4.5%

8/3/2026

311.52K→325.52K

Ordinary Shares

Direct

S · Sale

−80.00

Price / share

$783.84

Trade value

$62.71K

% of position

0.0%

8/3/2026

325.52K→325.44K

Ordinary Shares

Direct

S · Sale

−40.00

Price / share

$786.12

Trade value

$31.44K

% of position

0.0%

8/3/2026

325.44K→325.40K

Ordinary Shares

Direct

S · Sale

−160.00

Price / share

$787.77

Trade value

$126.04K

% of position

0.0%

8/3/2026

325.40K→325.24K

Ordinary Shares

Direct

S · Sale

−120.00

Price / share

$789.55

Trade value

$94.75K

% of position

0.0%

8/3/2026

325.24K→325.12K

Ordinary Shares

Direct

S · Sale

−440.00

Price / share

$790.98

Trade value

$348.03K

% of position

0.1%

8/3/2026

325.12K→324.68K

Ordinary Shares

Direct

S · Sale

−711.00

Price / share

$792.72

Trade value

$563.63K

% of position

0.2%

8/3/2026

324.68K→323.97K

Ordinary Shares

Direct

S · Sale

−480.00

Price / share

$793.70

Trade value

$380.98K

% of position

0.1%

8/3/2026

323.97K→323.49K

Ordinary Shares

Direct

S · Sale

−368.00

Price / share

$794.39

Trade value

$292.33K

% of position

0.1%

8/3/2026

323.49K→323.12K

Ordinary Shares

Direct

S · Sale

−761.00

Price / share

$795.81

Trade value

$605.61K

% of position

0.2%

8/3/2026

323.12K→322.36K

Ordinary Shares

Direct

S · Sale

−680.00

Price / share

$797.04

Trade value

$541.99K

% of position

0.2%

8/3/2026

322.36K→321.68K

Ordinary Shares

Direct

S · Sale

−560.00

Price / share

$797.85

Trade value

$446.79K

% of position

0.2%

8/3/2026

321.68K→321.12K

Ordinary Shares

Direct

S · Sale

−480.00

Price / share

$799.27

Trade value

$383.65K

% of position

0.1%

8/3/2026

321.12K→320.64K

Ordinary Shares

Direct

S · Sale

−520.00

Price / share

$800.08

Trade value

$416.04K

% of position

0.2%

8/3/2026

320.64K→320.12K

Ordinary Shares

Direct

S · Sale

−400.00

Price / share

$801.04

Trade value

$320.42K

% of position

0.1%

8/3/2026

320.12K→319.72K

Ordinary Shares

Direct

S · Sale

−360.00

Price / share

$802.08

Trade value

$288.75K

% of position

0.1%

8/3/2026

319.72K→319.36K

Ordinary Shares

Direct

S · Sale

−520.00

Price / share

$803.73

Trade value

$417.94K

% of position

0.2%

8/3/2026

319.36K→318.84K

Ordinary Shares

Direct

S · Sale

−840.00

Price / share

$804.73

Trade value

$675.98K

% of position

0.3%

8/3/2026

318.84K→318K

Ordinary Shares

Direct

S · Sale

−640.00

Price / share

$806.47

Trade value

$516.14K

% of position

0.2%

8/3/2026

318K→317.36K

Ordinary Shares

Direct

S · Sale

−280.00

Price / share

$807.65

Trade value

$226.14K

% of position

0.1%

8/3/2026

317.36K→317.08K

Ordinary Shares

Direct

S · Sale

−697.00

Price / share

$808.72

Trade value

$563.68K

% of position

0.2%

8/3/2026

317.08K→316.38K

Ordinary Shares

Direct

S · Sale

−383.00

Price / share

$809.71

Trade value

$310.12K

% of position

0.1%

8/3/2026

316.38K→316K

Ordinary Shares

Direct

S · Sale

−520.00

Price / share

$810.44

Trade value

$421.43K

% of position

0.2%

8/3/2026

316K→315.48K

Ordinary Shares

Direct

S · Sale

−640.00

Price / share

$811.82

Trade value

$519.56K

% of position

0.2%

8/3/2026

315.48K→314.84K

Ordinary Shares

Direct

S · Sale

−400.00

Price / share

$812.84

Trade value

$325.13K

% of position

0.1%

8/3/2026

314.84K→314.44K

Ordinary Shares

Direct

S · Sale

−366.00

Price / share

$814.07

Trade value

$297.95K

% of position

0.1%

8/3/2026

314.44K→314.07K

Ordinary Shares

Direct

S · Sale

−394.00

Price / share

$814.99

Trade value

$321.11K

% of position

0.1%

8/3/2026

314.07K→313.68K

Ordinary Shares

Direct

S · Sale

−320.00

Price / share

$815.87

Trade value

$261.08K

% of position

0.1%

8/3/2026

313.68K→313.36K

Ordinary Shares

Direct

S · Sale

−440.00

Price / share

$817.17

Trade value

$359.55K

% of position

0.1%

8/3/2026

313.36K→312.92K

Ordinary Shares

Direct

S · Sale

−320.00

Price / share

$818.32

Trade value

$261.86K

% of position

0.1%

8/3/2026

312.92K→312.60K

Total

Net shares

+1.08K

Net value

-$9.73M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Ordinary Shares Direct	8/3/2026	M · Option Exercise	+14K	$46.23	$647.22K	4.5%	311.52K	325.52K
Ordinary Shares Direct	8/3/2026	S · Sale	−80.00	$783.84	$62.71K	0.0%	325.52K	325.44K
Ordinary Shares Direct	8/3/2026	S · Sale	−40.00	$786.12	$31.44K	0.0%	325.44K	325.40K
Ordinary Shares Direct	8/3/2026	S · Sale	−160.00	$787.77	$126.04K	0.0%	325.40K	325.24K
Ordinary Shares Direct	8/3/2026	S · Sale	−120.00	$789.55	$94.75K	0.0%	325.24K	325.12K
Ordinary Shares Direct	8/3/2026	S · Sale	−440.00	$790.98	$348.03K	0.1%	325.12K	324.68K
Ordinary Shares Direct	8/3/2026	S · Sale	−711.00	$792.72	$563.63K	0.2%	324.68K	323.97K
Ordinary Shares Direct	8/3/2026	S · Sale	−480.00	$793.70	$380.98K	0.1%	323.97K	323.49K
Ordinary Shares Direct	8/3/2026	S · Sale	−368.00	$794.39	$292.33K	0.1%	323.49K	323.12K
Ordinary Shares Direct	8/3/2026	S · Sale	−761.00	$795.81	$605.61K	0.2%	323.12K	322.36K
Ordinary Shares Direct	8/3/2026	S · Sale	−680.00	$797.04	$541.99K	0.2%	322.36K	321.68K
Ordinary Shares Direct	8/3/2026	S · Sale	−560.00	$797.85	$446.79K	0.2%	321.68K	321.12K
Ordinary Shares Direct	8/3/2026	S · Sale	−480.00	$799.27	$383.65K	0.1%	321.12K	320.64K
Ordinary Shares Direct	8/3/2026	S · Sale	−520.00	$800.08	$416.04K	0.2%	320.64K	320.12K
Ordinary Shares Direct	8/3/2026	S · Sale	−400.00	$801.04	$320.42K	0.1%	320.12K	319.72K
Ordinary Shares Direct	8/3/2026	S · Sale	−360.00	$802.08	$288.75K	0.1%	319.72K	319.36K
Ordinary Shares Direct	8/3/2026	S · Sale	−520.00	$803.73	$417.94K	0.2%	319.36K	318.84K
Ordinary Shares Direct	8/3/2026	S · Sale	−840.00	$804.73	$675.98K	0.3%	318.84K	318K
Ordinary Shares Direct	8/3/2026	S · Sale	−640.00	$806.47	$516.14K	0.2%	318K	317.36K
Ordinary Shares Direct	8/3/2026	S · Sale	−280.00	$807.65	$226.14K	0.1%	317.36K	317.08K
Ordinary Shares Direct	8/3/2026	S · Sale	−697.00	$808.72	$563.68K	0.2%	317.08K	316.38K
Ordinary Shares Direct	8/3/2026	S · Sale	−383.00	$809.71	$310.12K	0.1%	316.38K	316K
Ordinary Shares Direct	8/3/2026	S · Sale	−520.00	$810.44	$421.43K	0.2%	316K	315.48K
Ordinary Shares Direct	8/3/2026	S · Sale	−640.00	$811.82	$519.56K	0.2%	315.48K	314.84K
Ordinary Shares Direct	8/3/2026	S · Sale	−400.00	$812.84	$325.13K	0.1%	314.84K	314.44K
Ordinary Shares Direct	8/3/2026	S · Sale	−366.00	$814.07	$297.95K	0.1%	314.44K	314.07K
Ordinary Shares Direct	8/3/2026	S · Sale	−394.00	$814.99	$321.11K	0.1%	314.07K	313.68K
Ordinary Shares Direct	8/3/2026	S · Sale	−320.00	$815.87	$261.08K	0.1%	313.68K	313.36K
Ordinary Shares Direct	8/3/2026	S · Sale	−440.00	$817.17	$359.55K	0.1%	313.36K	312.92K
Ordinary Shares Direct	8/3/2026	S · Sale	−320.00	$818.32	$261.86K	0.1%	312.92K	312.60K
Total			+1.08K		-$9.73M

Derivative Transactions1

NQ Options

Direct

M · Option Exercise

Converts to

Ordinary Shares

14K shares

−14K

Strike price

46.23

Held after

111.10K

Exercisable

—

8/3/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
NQ Options Direct	Ordinary Shares14K shares	8/3/2026	M · Option Exercise	−14K	46.23	—	111.10K