MORRIS JOHN CHRISTOPHER (EVP & CTO) sold 29.2% of their position (9.35K shares) of SEAGATE TECHNOLOGY HOLDINGS PLC on the open market

Open‑market sale worth $8.21M — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 26 sales

MORRIS JOHN CHRISTOPHER

Filed: 9/22/2026ACC: 0001137789-26-000256

InsiderMORRIS JOHN CHRISTOPHERCIK 1988271

→

IssuerSEAGATE TECHNOLOGY HOLDINGS PLCCIK 1137789

Officer· EVP & CTO

Since Feb 2026

-9.35K

Net shares

Net seller

$8.21M

Total sold

Open market trades

0B · 26S

Total transactions

915.00 acquired · 10.27K disposed

Non-Derivative Transactions27

Ordinary Shares

Direct

M · Option Exercise

+915.00

Price / share

$158.40

Trade value

$144.94K

% of position

2.9%

9/21/2026

31.13K→32.05K

Ordinary Shares

Direct

S · Sale

−40.00

Price / share

$863.66

Trade value

$34.55K

% of position

0.1%

9/21/2026

32.05K→32.01K

Ordinary Shares

Direct

S · Sale

−80.00

Price / share

$865.11

Trade value

$69.21K

% of position

0.2%

9/21/2026

32.01K→31.93K

Ordinary Shares

Direct

S · Sale

−40.00

Price / share

$865.80

Trade value

$34.63K

% of position

0.1%

9/21/2026

31.93K→31.89K

Ordinary Shares

Direct

S · Sale

−160.00

Price / share

$868.11

Trade value

$138.90K

% of position

0.5%

9/21/2026

31.89K→31.73K

Ordinary Shares

Direct

S · Sale

−80.00

Price / share

$869.21

Trade value

$69.54K

% of position

0.3%

9/21/2026

31.73K→31.65K

Ordinary Shares

Direct

S · Sale

−200.00

Price / share

$870.28

Trade value

$174.06K

% of position

0.6%

9/21/2026

31.65K→31.45K

Ordinary Shares

Direct

S · Sale

−520.00

Price / share

$871.56

Trade value

$453.21K

% of position

1.7%

9/21/2026

31.45K→30.93K

Ordinary Shares

Direct

S · Sale

−1K

Price / share

$872.42

Trade value

$872.42K

% of position

3.2%

9/21/2026

30.93K→29.93K

Ordinary Shares

Direct

S · Sale

−1.04K

Price / share

$873.49

Trade value

$908.43K

% of position

3.5%

9/21/2026

29.93K→28.89K

Ordinary Shares

Direct

S · Sale

−986.00

Price / share

$874.50

Trade value

$862.26K

% of position

3.4%

9/21/2026

28.89K→27.90K

Ordinary Shares

Direct

S · Sale

−974.00

Price / share

$875.35

Trade value

$852.59K

% of position

3.5%

9/21/2026

27.90K→26.93K

Ordinary Shares

Direct

S · Sale

−760.00

Price / share

$876.54

Trade value

$666.17K

% of position

2.8%

9/21/2026

26.93K→26.17K

Ordinary Shares

Direct

S · Sale

−418.00

Price / share

$877.36

Trade value

$366.74K

% of position

1.6%

9/21/2026

26.17K→25.75K

Ordinary Shares

Direct

S · Sale

−280.00

Price / share

$878.38

Trade value

$245.95K

% of position

1.1%

9/21/2026

25.75K→25.47K

Ordinary Shares

Direct

S · Sale

−200.00

Price / share

$879.71

Trade value

$175.94K

% of position

0.8%

9/21/2026

25.47K→25.27K

Ordinary Shares

Direct

S · Sale

−741.00

Price / share

$881.16

Trade value

$652.94K

% of position

2.9%

9/21/2026

25.27K→24.53K

Ordinary Shares

Direct

S · Sale

−200.00

Price / share

$881.90

Trade value

$176.38K

% of position

0.8%

9/21/2026

24.53K→24.33K

Ordinary Shares

Direct

S · Sale

−320.00

Price / share

$883.08

Trade value

$282.58K

% of position

1.3%

9/21/2026

24.33K→24.01K

Ordinary Shares

Direct

S · Sale

−40.00

Price / share

$886.27

Trade value

$35.45K

% of position

0.2%

9/21/2026

24.01K→23.97K

Ordinary Shares

Direct

S · Sale

−120.00

Price / share

$887.92

Trade value

$106.55K

% of position

0.5%

9/21/2026

23.97K→23.85K

Ordinary Shares

Direct

S · Sale

−40.00

Price / share

$890.54

Trade value

$35.62K

% of position

0.2%

9/21/2026

23.85K→23.81K

Ordinary Shares

Direct

S · Sale

−40.00

Price / share

$893.15

Trade value

$35.73K

% of position

0.2%

9/21/2026

23.81K→23.77K

Ordinary Shares

Direct

S · Sale

−915.00

Price / share

$894.27

Trade value

$818.26K

% of position

3.8%

9/21/2026

23.77K→22.85K

Ordinary Shares

Direct

S · Sale

−80.00

Price / share

$897.28

Trade value

$71.78K

% of position

0.4%

9/21/2026

22.85K→22.77K

Ordinary Shares

Direct

S · Sale

−40.00

Price / share

$899.53

Trade value

$35.98K

% of position

0.2%

9/21/2026

22.77K→22.73K

Ordinary Shares

Direct

S · Sale

−40.00

Price / share

$902.07

Trade value

$36.08K

% of position

0.2%

9/21/2026

22.73K→22.69K

Total

Net shares

−8.44K

Net value

-$8.07M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Ordinary Shares Direct	9/21/2026	M · Option Exercise	+915.00	$158.40	$144.94K	2.9%	31.13K	32.05K
Ordinary Shares Direct	9/21/2026	S · Sale	−40.00	$863.66	$34.55K	0.1%	32.05K	32.01K
Ordinary Shares Direct	9/21/2026	S · Sale	−80.00	$865.11	$69.21K	0.2%	32.01K	31.93K
Ordinary Shares Direct	9/21/2026	S · Sale	−40.00	$865.80	$34.63K	0.1%	31.93K	31.89K
Ordinary Shares Direct	9/21/2026	S · Sale	−160.00	$868.11	$138.90K	0.5%	31.89K	31.73K
Ordinary Shares Direct	9/21/2026	S · Sale	−80.00	$869.21	$69.54K	0.3%	31.73K	31.65K
Ordinary Shares Direct	9/21/2026	S · Sale	−200.00	$870.28	$174.06K	0.6%	31.65K	31.45K
Ordinary Shares Direct	9/21/2026	S · Sale	−520.00	$871.56	$453.21K	1.7%	31.45K	30.93K
Ordinary Shares Direct	9/21/2026	S · Sale	−1K	$872.42	$872.42K	3.2%	30.93K	29.93K
Ordinary Shares Direct	9/21/2026	S · Sale	−1.04K	$873.49	$908.43K	3.5%	29.93K	28.89K
Ordinary Shares Direct	9/21/2026	S · Sale	−986.00	$874.50	$862.26K	3.4%	28.89K	27.90K
Ordinary Shares Direct	9/21/2026	S · Sale	−974.00	$875.35	$852.59K	3.5%	27.90K	26.93K
Ordinary Shares Direct	9/21/2026	S · Sale	−760.00	$876.54	$666.17K	2.8%	26.93K	26.17K
Ordinary Shares Direct	9/21/2026	S · Sale	−418.00	$877.36	$366.74K	1.6%	26.17K	25.75K
Ordinary Shares Direct	9/21/2026	S · Sale	−280.00	$878.38	$245.95K	1.1%	25.75K	25.47K
Ordinary Shares Direct	9/21/2026	S · Sale	−200.00	$879.71	$175.94K	0.8%	25.47K	25.27K
Ordinary Shares Direct	9/21/2026	S · Sale	−741.00	$881.16	$652.94K	2.9%	25.27K	24.53K
Ordinary Shares Direct	9/21/2026	S · Sale	−200.00	$881.90	$176.38K	0.8%	24.53K	24.33K
Ordinary Shares Direct	9/21/2026	S · Sale	−320.00	$883.08	$282.58K	1.3%	24.33K	24.01K
Ordinary Shares Direct	9/21/2026	S · Sale	−40.00	$886.27	$35.45K	0.2%	24.01K	23.97K
Ordinary Shares Direct	9/21/2026	S · Sale	−120.00	$887.92	$106.55K	0.5%	23.97K	23.85K
Ordinary Shares Direct	9/21/2026	S · Sale	−40.00	$890.54	$35.62K	0.2%	23.85K	23.81K
Ordinary Shares Direct	9/21/2026	S · Sale	−40.00	$893.15	$35.73K	0.2%	23.81K	23.77K
Ordinary Shares Direct	9/21/2026	S · Sale	−915.00	$894.27	$818.26K	3.8%	23.77K	22.85K
Ordinary Shares Direct	9/21/2026	S · Sale	−80.00	$897.28	$71.78K	0.4%	22.85K	22.77K
Ordinary Shares Direct	9/21/2026	S · Sale	−40.00	$899.53	$35.98K	0.2%	22.77K	22.73K
Ordinary Shares Direct	9/21/2026	S · Sale	−40.00	$902.07	$36.08K	0.2%	22.73K	22.69K
Total			−8.44K		-$8.07M

Derivative Transactions1

NQ Stock Option

Direct

M · Option Exercise

Converts to

Ordinary Shares

915.00 shares

−915.00

Strike price

158.40

Held after

17.38K

Exercisable

—

9/21/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
NQ Stock Option Direct	Ordinary Shares915.00 shares	9/21/2026	M · Option Exercise	−915.00	158.40	—	17.38K