MOSLEY WILLIAM D (CEO) sold 6.0% of their position (20.66K shares) of SEAGATE TECHNOLOGY HOLDINGS PLC on the open market

Open‑market sale worth $18.81M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 29 sales

MOSLEY WILLIAM D

Filed: 7/2/2026ACC: 0001137789-26-000147

InsiderMOSLEY WILLIAM DCIK 1388390

→

IssuerSEAGATE TECHNOLOGY HOLDINGS PLCCIK 1137789

DirectorOfficer· CEO

Since Mar 2026

-20.66K

Net shares

Net seller

$18.81M

Total sold

Open market trades

0B · 29S

Total transactions

14K acquired · 34.66K disposed

Non-Derivative Transactions30

Ordinary Shares

Direct

M · Option Exercise

+14K

Price / share

$46.23

Trade value

$647.22K

% of position

4.3%

7/1/2026

327.52K→341.52K

Ordinary Shares

Direct

S · Sale

−320.00

Price / share

$887.97

Trade value

$284.15K

% of position

0.1%

7/1/2026

341.52K→341.20K

Ordinary Shares

Direct

S · Sale

−320.00

Price / share

$890.01

Trade value

$284.80K

% of position

0.1%

7/1/2026

341.20K→340.88K

Ordinary Shares

Direct

S · Sale

−120.00

Price / share

$891.13

Trade value

$106.94K

% of position

0.0%

7/1/2026

340.88K→340.76K

Ordinary Shares

Direct

S · Sale

−200.00

Price / share

$892.08

Trade value

$178.42K

% of position

0.1%

7/1/2026

340.76K→340.56K

Ordinary Shares

Direct

S · Sale

−40.00

Price / share

$892.93

Trade value

$35.72K

% of position

0.0%

7/1/2026

340.56K→340.52K

Ordinary Shares

Direct

S · Sale

−266.00

Price / share

$894.39

Trade value

$237.91K

% of position

0.1%

7/1/2026

340.52K→340.25K

Ordinary Shares

Direct

S · Sale

−254.00

Price / share

$895.66

Trade value

$227.50K

% of position

0.1%

7/1/2026

340.25K→340K

Ordinary Shares

Direct

S · Sale

−400.00

Price / share

$896.77

Trade value

$358.71K

% of position

0.1%

7/1/2026

340K→339.60K

Ordinary Shares

Direct

S · Sale

−340.00

Price / share

$897.78

Trade value

$305.25K

% of position

0.1%

7/1/2026

339.60K→339.26K

Ordinary Shares

Direct

S · Sale

−300.00

Price / share

$898.79

Trade value

$269.64K

% of position

0.1%

7/1/2026

339.26K→338.96K

Ordinary Shares

Direct

S · Sale

−308.00

Price / share

$900.05

Trade value

$277.21K

% of position

0.1%

7/1/2026

338.96K→338.65K

Ordinary Shares

Direct

S · Sale

−401.00

Price / share

$900.82

Trade value

$361.23K

% of position

0.1%

7/1/2026

338.65K→338.25K

Ordinary Shares

Direct

S · Sale

−320.00

Price / share

$902.14

Trade value

$288.68K

% of position

0.1%

7/1/2026

338.25K→337.93K

Ordinary Shares

Direct

S · Sale

−560.00

Price / share

$903.08

Trade value

$505.73K

% of position

0.2%

7/1/2026

337.93K→337.37K

Ordinary Shares

Direct

S · Sale

−720.00

Price / share

$904.36

Trade value

$651.14K

% of position

0.2%

7/1/2026

337.37K→336.65K

Ordinary Shares

Direct

S · Sale

−320.00

Price / share

$905.12

Trade value

$289.64K

% of position

0.1%

7/1/2026

336.65K→336.33K

Ordinary Shares

Direct

S · Sale

−609.00

Price / share

$906.47

Trade value

$552.04K

% of position

0.2%

7/1/2026

336.33K→335.72K

Ordinary Shares

Direct

S · Sale

−391.00

Price / share

$907.56

Trade value

$354.85K

% of position

0.1%

7/1/2026

335.72K→335.33K

Ordinary Shares

Direct

S · Sale

−560.00

Price / share

$908.42

Trade value

$508.71K

% of position

0.2%

7/1/2026

335.33K→334.77K

Ordinary Shares

Direct

S · Sale

−441.00

Price / share

$909.52

Trade value

$401.10K

% of position

0.1%

7/1/2026

334.77K→334.33K

Ordinary Shares

Direct

S · Sale

−399.00

Price / share

$910.49

Trade value

$363.29K

% of position

0.1%

7/1/2026

334.33K→333.93K

Ordinary Shares

Direct

S · Sale

−960.00

Price / share

$911.63

Trade value

$875.17K

% of position

0.3%

7/1/2026

333.93K→332.97K

Ordinary Shares

Direct

S · Sale

−813.00

Price / share

$912.72

Trade value

$742.04K

% of position

0.2%

7/1/2026

332.97K→332.15K

Ordinary Shares

Direct

S · Sale

−1.60K

Price / share

$913.65

Trade value

$1.46M

% of position

0.5%

7/1/2026

332.15K→330.56K

Ordinary Shares

Direct

S · Sale

−2.38K

Price / share

$914.77

Trade value

$2.18M

% of position

0.7%

7/1/2026

330.56K→328.18K

Ordinary Shares

Direct

S · Sale

−2.31K

Price / share

$915.65

Trade value

$2.11M

% of position

0.7%

7/1/2026

328.18K→325.87K

Ordinary Shares

Direct

S · Sale

−1.19K

Price / share

$916.61

Trade value

$1.09M

% of position

0.4%

7/1/2026

325.87K→324.69K

Ordinary Shares

Direct

S · Sale

−1.76K

Price / share

$917.67

Trade value

$1.62M

% of position

0.5%

7/1/2026

324.69K→322.93K

Ordinary Shares

Direct

S · Sale

−2.06K

Price / share

$918.67

Trade value

$1.90M

% of position

0.6%

7/1/2026

322.93K→320.86K

Total

Net shares

−6.66K

Net value

-$18.16M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Ordinary Shares Direct	7/1/2026	M · Option Exercise	+14K	$46.23	$647.22K	4.3%	327.52K	341.52K
Ordinary Shares Direct	7/1/2026	S · Sale	−320.00	$887.97	$284.15K	0.1%	341.52K	341.20K
Ordinary Shares Direct	7/1/2026	S · Sale	−320.00	$890.01	$284.80K	0.1%	341.20K	340.88K
Ordinary Shares Direct	7/1/2026	S · Sale	−120.00	$891.13	$106.94K	0.0%	340.88K	340.76K
Ordinary Shares Direct	7/1/2026	S · Sale	−200.00	$892.08	$178.42K	0.1%	340.76K	340.56K
Ordinary Shares Direct	7/1/2026	S · Sale	−40.00	$892.93	$35.72K	0.0%	340.56K	340.52K
Ordinary Shares Direct	7/1/2026	S · Sale	−266.00	$894.39	$237.91K	0.1%	340.52K	340.25K
Ordinary Shares Direct	7/1/2026	S · Sale	−254.00	$895.66	$227.50K	0.1%	340.25K	340K
Ordinary Shares Direct	7/1/2026	S · Sale	−400.00	$896.77	$358.71K	0.1%	340K	339.60K
Ordinary Shares Direct	7/1/2026	S · Sale	−340.00	$897.78	$305.25K	0.1%	339.60K	339.26K
Ordinary Shares Direct	7/1/2026	S · Sale	−300.00	$898.79	$269.64K	0.1%	339.26K	338.96K
Ordinary Shares Direct	7/1/2026	S · Sale	−308.00	$900.05	$277.21K	0.1%	338.96K	338.65K
Ordinary Shares Direct	7/1/2026	S · Sale	−401.00	$900.82	$361.23K	0.1%	338.65K	338.25K
Ordinary Shares Direct	7/1/2026	S · Sale	−320.00	$902.14	$288.68K	0.1%	338.25K	337.93K
Ordinary Shares Direct	7/1/2026	S · Sale	−560.00	$903.08	$505.73K	0.2%	337.93K	337.37K
Ordinary Shares Direct	7/1/2026	S · Sale	−720.00	$904.36	$651.14K	0.2%	337.37K	336.65K
Ordinary Shares Direct	7/1/2026	S · Sale	−320.00	$905.12	$289.64K	0.1%	336.65K	336.33K
Ordinary Shares Direct	7/1/2026	S · Sale	−609.00	$906.47	$552.04K	0.2%	336.33K	335.72K
Ordinary Shares Direct	7/1/2026	S · Sale	−391.00	$907.56	$354.85K	0.1%	335.72K	335.33K
Ordinary Shares Direct	7/1/2026	S · Sale	−560.00	$908.42	$508.71K	0.2%	335.33K	334.77K
Ordinary Shares Direct	7/1/2026	S · Sale	−441.00	$909.52	$401.10K	0.1%	334.77K	334.33K
Ordinary Shares Direct	7/1/2026	S · Sale	−399.00	$910.49	$363.29K	0.1%	334.33K	333.93K
Ordinary Shares Direct	7/1/2026	S · Sale	−960.00	$911.63	$875.17K	0.3%	333.93K	332.97K
Ordinary Shares Direct	7/1/2026	S · Sale	−813.00	$912.72	$742.04K	0.2%	332.97K	332.15K
Ordinary Shares Direct	7/1/2026	S · Sale	−1.60K	$913.65	$1.46M	0.5%	332.15K	330.56K
Ordinary Shares Direct	7/1/2026	S · Sale	−2.38K	$914.77	$2.18M	0.7%	330.56K	328.18K
Ordinary Shares Direct	7/1/2026	S · Sale	−2.31K	$915.65	$2.11M	0.7%	328.18K	325.87K
Ordinary Shares Direct	7/1/2026	S · Sale	−1.19K	$916.61	$1.09M	0.4%	325.87K	324.69K
Ordinary Shares Direct	7/1/2026	S · Sale	−1.76K	$917.67	$1.62M	0.5%	324.69K	322.93K
Ordinary Shares Direct	7/1/2026	S · Sale	−2.06K	$918.67	$1.90M	0.6%	322.93K	320.86K
Total			−6.66K		-$18.16M

Derivative Transactions1

NQ Options

Direct

M · Option Exercise

Converts to

Ordinary Shares

14K shares

−14K

Strike price

46.23

Held after

125.10K

Exercisable

—

7/1/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
NQ Options Direct	Ordinary Shares14K shares	7/1/2026	M · Option Exercise	−14K	46.23	—	125.10K