MOSLEY WILLIAM D (CEO) sold 4.8% of their position (19K shares) of SEAGATE TECHNOLOGY HOLDINGS PLC on the open market

Open‑market sale worth $17.38M — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 28 sales

MOSLEY WILLIAM D

Filed: 10/2/2026ACC: 0001137789-26-000261

InsiderMOSLEY WILLIAM DCIK 1388390

→

IssuerSEAGATE TECHNOLOGY HOLDINGS PLCCIK 1137789

DirectorOfficer· CEO

Since Mar 2026

-19K

Net shares

Net seller

$17.38M

Total sold

Open market trades

0B · 28S

Total transactions

14K acquired · 33K disposed

Non-Derivative Transactions29

Ordinary Shares

Direct

M · Option Exercise

+14K

Price / share

$46.23

Trade value

$647.22K

% of position

3.7%

10/1/2026

378.11K→392.11K

Ordinary Shares

Direct

S · Sale

−360.00

Price / share

$898.10

Trade value

$323.31K

% of position

0.1%

10/1/2026

392.11K→391.75K

Ordinary Shares

Direct

S · Sale

−517.00

Price / share

$900.46

Trade value

$465.54K

% of position

0.1%

10/1/2026

391.75K→391.23K

Ordinary Shares

Direct

S · Sale

−440.00

Price / share

$901.49

Trade value

$396.65K

% of position

0.1%

10/1/2026

391.23K→390.79K

Ordinary Shares

Direct

S · Sale

−384.00

Price / share

$902.55

Trade value

$346.58K

% of position

0.1%

10/1/2026

390.79K→390.41K

Ordinary Shares

Direct

S · Sale

−696.00

Price / share

$903.36

Trade value

$628.74K

% of position

0.2%

10/1/2026

390.41K→389.71K

Ordinary Shares

Direct

S · Sale

−480.00

Price / share

$904.33

Trade value

$434.08K

% of position

0.1%

10/1/2026

389.71K→389.23K

Ordinary Shares

Direct

S · Sale

−480.00

Price / share

$905.38

Trade value

$434.58K

% of position

0.1%

10/1/2026

389.23K→388.75K

Ordinary Shares

Direct

S · Sale

−601.00

Price / share

$906.42

Trade value

$544.76K

% of position

0.2%

10/1/2026

388.75K→388.15K

Ordinary Shares

Direct

S · Sale

−560.00

Price / share

$907.43

Trade value

$508.16K

% of position

0.1%

10/1/2026

388.15K→387.59K

Ordinary Shares

Direct

S · Sale

−1.03K

Price / share

$908.58

Trade value

$933.11K

% of position

0.3%

10/1/2026

387.59K→386.56K

Ordinary Shares

Direct

S · Sale

−307.00

Price / share

$909.84

Trade value

$279.32K

% of position

0.1%

10/1/2026

386.56K→386.26K

Ordinary Shares

Direct

S · Sale

−840.00

Price / share

$910.69

Trade value

$764.98K

% of position

0.2%

10/1/2026

386.26K→385.42K

Ordinary Shares

Direct

S · Sale

−1.15K

Price / share

$912.04

Trade value

$1.05M

% of position

0.3%

10/1/2026

385.42K→384.27K

Ordinary Shares

Direct

S · Sale

−696.00

Price / share

$913.08

Trade value

$635.50K

% of position

0.2%

10/1/2026

384.27K→383.57K

Ordinary Shares

Direct

S · Sale

−904.00

Price / share

$913.94

Trade value

$826.20K

% of position

0.2%

10/1/2026

383.57K→382.67K

Ordinary Shares

Direct

S · Sale

−960.00

Price / share

$915.01

Trade value

$878.41K

% of position

0.3%

10/1/2026

382.67K→381.71K

Ordinary Shares

Direct

S · Sale

−480.00

Price / share

$916.10

Trade value

$439.73K

% of position

0.1%

10/1/2026

381.71K→381.23K

Ordinary Shares

Direct

S · Sale

−400.00

Price / share

$917.22

Trade value

$366.89K

% of position

0.1%

10/1/2026

381.23K→380.83K

Ordinary Shares

Direct

S · Sale

−920.00

Price / share

$918.49

Trade value

$845.01K

% of position

0.2%

10/1/2026

380.83K→379.91K

Ordinary Shares

Direct

S · Sale

−840.00

Price / share

$919.56

Trade value

$772.43K

% of position

0.2%

10/1/2026

379.91K→379.07K

Ordinary Shares

Direct

S · Sale

−630.00

Price / share

$920.62

Trade value

$579.99K

% of position

0.2%

10/1/2026

379.07K→378.44K

Ordinary Shares

Direct

S · Sale

−930.00

Price / share

$921.63

Trade value

$857.12K

% of position

0.2%

10/1/2026

378.44K→377.51K

Ordinary Shares

Direct

S · Sale

−800.00

Price / share

$922.66

Trade value

$738.13K

% of position

0.2%

10/1/2026

377.51K→376.71K

Ordinary Shares

Direct

S · Sale

−760.00

Price / share

$923.78

Trade value

$702.07K

% of position

0.2%

10/1/2026

376.71K→375.95K

Ordinary Shares

Direct

S · Sale

−640.00

Price / share

$924.72

Trade value

$591.82K

% of position

0.2%

10/1/2026

375.95K→375.31K

Ordinary Shares

Direct

S · Sale

−1.08K

Price / share

$925.88

Trade value

$999.95K

% of position

0.3%

10/1/2026

375.31K→374.23K

Ordinary Shares

Direct

S · Sale

−480.00

Price / share

$926.78

Trade value

$444.85K

% of position

0.1%

10/1/2026

374.23K→373.75K

Ordinary Shares

Direct

S · Sale

−640.00

Price / share

$927.90

Trade value

$593.85K

% of position

0.2%

10/1/2026

373.75K→373.11K

Total

Net shares

−5K

Net value

-$16.73M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Ordinary Shares Direct	10/1/2026	M · Option Exercise	+14K	$46.23	$647.22K	3.7%	378.11K	392.11K
Ordinary Shares Direct	10/1/2026	S · Sale	−360.00	$898.10	$323.31K	0.1%	392.11K	391.75K
Ordinary Shares Direct	10/1/2026	S · Sale	−517.00	$900.46	$465.54K	0.1%	391.75K	391.23K
Ordinary Shares Direct	10/1/2026	S · Sale	−440.00	$901.49	$396.65K	0.1%	391.23K	390.79K
Ordinary Shares Direct	10/1/2026	S · Sale	−384.00	$902.55	$346.58K	0.1%	390.79K	390.41K
Ordinary Shares Direct	10/1/2026	S · Sale	−696.00	$903.36	$628.74K	0.2%	390.41K	389.71K
Ordinary Shares Direct	10/1/2026	S · Sale	−480.00	$904.33	$434.08K	0.1%	389.71K	389.23K
Ordinary Shares Direct	10/1/2026	S · Sale	−480.00	$905.38	$434.58K	0.1%	389.23K	388.75K
Ordinary Shares Direct	10/1/2026	S · Sale	−601.00	$906.42	$544.76K	0.2%	388.75K	388.15K
Ordinary Shares Direct	10/1/2026	S · Sale	−560.00	$907.43	$508.16K	0.1%	388.15K	387.59K
Ordinary Shares Direct	10/1/2026	S · Sale	−1.03K	$908.58	$933.11K	0.3%	387.59K	386.56K
Ordinary Shares Direct	10/1/2026	S · Sale	−307.00	$909.84	$279.32K	0.1%	386.56K	386.26K
Ordinary Shares Direct	10/1/2026	S · Sale	−840.00	$910.69	$764.98K	0.2%	386.26K	385.42K
Ordinary Shares Direct	10/1/2026	S · Sale	−1.15K	$912.04	$1.05M	0.3%	385.42K	384.27K
Ordinary Shares Direct	10/1/2026	S · Sale	−696.00	$913.08	$635.50K	0.2%	384.27K	383.57K
Ordinary Shares Direct	10/1/2026	S · Sale	−904.00	$913.94	$826.20K	0.2%	383.57K	382.67K
Ordinary Shares Direct	10/1/2026	S · Sale	−960.00	$915.01	$878.41K	0.3%	382.67K	381.71K
Ordinary Shares Direct	10/1/2026	S · Sale	−480.00	$916.10	$439.73K	0.1%	381.71K	381.23K
Ordinary Shares Direct	10/1/2026	S · Sale	−400.00	$917.22	$366.89K	0.1%	381.23K	380.83K
Ordinary Shares Direct	10/1/2026	S · Sale	−920.00	$918.49	$845.01K	0.2%	380.83K	379.91K
Ordinary Shares Direct	10/1/2026	S · Sale	−840.00	$919.56	$772.43K	0.2%	379.91K	379.07K
Ordinary Shares Direct	10/1/2026	S · Sale	−630.00	$920.62	$579.99K	0.2%	379.07K	378.44K
Ordinary Shares Direct	10/1/2026	S · Sale	−930.00	$921.63	$857.12K	0.2%	378.44K	377.51K
Ordinary Shares Direct	10/1/2026	S · Sale	−800.00	$922.66	$738.13K	0.2%	377.51K	376.71K
Ordinary Shares Direct	10/1/2026	S · Sale	−760.00	$923.78	$702.07K	0.2%	376.71K	375.95K
Ordinary Shares Direct	10/1/2026	S · Sale	−640.00	$924.72	$591.82K	0.2%	375.95K	375.31K
Ordinary Shares Direct	10/1/2026	S · Sale	−1.08K	$925.88	$999.95K	0.3%	375.31K	374.23K
Ordinary Shares Direct	10/1/2026	S · Sale	−480.00	$926.78	$444.85K	0.1%	374.23K	373.75K
Ordinary Shares Direct	10/1/2026	S · Sale	−640.00	$927.90	$593.85K	0.2%	373.75K	373.11K
Total			−5K		-$16.73M

Derivative Transactions1

NQ Options

Direct

M · Option Exercise

Converts to

Ordinary Shares

14K shares

−14K

Strike price

46.23

Held after

83.10K

Exercisable

—

10/1/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
NQ Options Direct	Ordinary Shares14K shares	10/1/2026	M · Option Exercise	−14K	46.23	—	83.10K