MORRIS JOHN CHRISTOPHER (EVP & CTO) sold 20.7% of their position (4.04K shares) of SEAGATE TECHNOLOGY HOLDINGS PLC on the open market

Open‑market sale worth $3.42M — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 4 sales

MORRIS JOHN CHRISTOPHER

Filed: 8/24/2026ACC: 0001137789-26-000186

InsiderMORRIS JOHN CHRISTOPHERCIK 1988271

→

IssuerSEAGATE TECHNOLOGY HOLDINGS PLCCIK 1137789

Officer· EVP & CTO

Since Feb 2026

+6.12K

Net shares

Net buyer

$3.42M

Total sold

Open market trades

0B · 4S

Total transactions

17.74K acquired · 11.62K disposed

Non-Derivative Transactions8

Ordinary Shares

Direct

M · Option Exercise

+1.76K

Price / share

—

Trade value

—

% of position

14.8%

8/20/2026

11.92K→13.68K

Ordinary Shares

Direct

M · Option Exercise

+4.07K

Price / share

—

Trade value

—

% of position

31.8%

8/20/2026

12.81K→16.88K

Ordinary Shares

Direct

M · Option Exercise

+1.22K

Price / share

—

Trade value

—

% of position

8.2%

8/20/2026

14.85K→16.07K

Ordinary Shares

Direct

M · Option Exercise

+523.00

Price / share

$158.40

Trade value

$82.84K

% of position

3.4%

8/20/2026

15.46K→15.98K

Ordinary Shares

Direct

S · Sale

−523.00

Price / share

$835.54

Trade value

$436.99K

% of position

3.3%

8/20/2026

15.98K→15.46K

Ordinary Shares

Direct

S · Sale

−879.00

Price / share

$849.35

Trade value

$746.58K

% of position

6.4%

8/21/2026

13.68K→12.81K

Ordinary Shares

Direct

S · Sale

−2.03K

Price / share

$849.35

Trade value

$1.72M

% of position

12.0%

8/21/2026

16.88K→14.85K

Ordinary Shares

Direct

S · Sale

−608.50

Price / share

$849.35

Trade value

$516.83K

% of position

3.8%

8/21/2026

16.07K→15.46K

Total

Net shares

+3.54K

Net value

-$3.34M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Ordinary Shares Direct	8/20/2026	M · Option Exercise	+1.76K	—	—	14.8%	11.92K	13.68K
Ordinary Shares Direct	8/20/2026	M · Option Exercise	+4.07K	—	—	31.8%	12.81K	16.88K
Ordinary Shares Direct	8/20/2026	M · Option Exercise	+1.22K	—	—	8.2%	14.85K	16.07K
Ordinary Shares Direct	8/20/2026	M · Option Exercise	+523.00	$158.40	$82.84K	3.4%	15.46K	15.98K
Ordinary Shares Direct	8/20/2026	S · Sale	−523.00	$835.54	$436.99K	3.3%	15.98K	15.46K
Ordinary Shares Direct	8/21/2026	S · Sale	−879.00	$849.35	$746.58K	6.4%	13.68K	12.81K
Ordinary Shares Direct	8/21/2026	S · Sale	−2.03K	$849.35	$1.72M	12.0%	16.88K	14.85K
Ordinary Shares Direct	8/21/2026	S · Sale	−608.50	$849.35	$516.83K	3.8%	16.07K	15.46K
Total			+3.54K		-$3.34M

Derivative Transactions8

Restricted Share Unit

Direct

M · Option Exercise

Converts to

Ordinary Shares

1.76K shares

−1.76K

Strike price

Held after

5.29K

Exercisable

—

8/20/2026

Restricted Share Unit

Direct

M · Option Exercise

Converts to

Ordinary Shares

4.07K shares

−4.07K

Strike price

Held after

0.00

Exercisable

—

8/20/2026

Restricted Share Unit

Direct

M · Option Exercise

Converts to

Ordinary Shares

1.22K shares

−1.22K

Strike price

Held after

0.00

Exercisable

—

8/20/2026

NQ Stock Option

Direct

M · Option Exercise

Converts to

Ordinary Shares

523.00 shares

−523.00

Strike price

158.40

Held after

18.29K

Exercisable

—

8/20/2026

Restricted Share Unit

Direct

A · Award

Converts to

Ordinary Shares

2.31K shares

+2.31K

Strike price

Held after

2.31K

Exercisable

—

8/20/2026

Restricted Share Unit

Direct

A · Award

Converts to

Ordinary Shares

1.31K shares

+1.31K

Strike price

Held after

1.31K

Exercisable

—

8/20/2026

Restricted Share Unit

Direct

A · Award

Converts to

Ordinary Shares

393.00 shares

+393.00

Strike price

Held after

393.00

Exercisable

—

8/20/2026

NQ Stock Option

Direct

A · Award

Converts to

Ordinary Shares

6.15K shares

+6.15K

Strike price

850.24

Held after

6.15K

Exercisable

—

8/20/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Share Unit Direct	Ordinary Shares1.76K shares	8/20/2026	M · Option Exercise	−1.76K	0	—	5.29K
Restricted Share Unit Direct	Ordinary Shares4.07K shares	8/20/2026	M · Option Exercise	−4.07K	0	—	0.00
Restricted Share Unit Direct	Ordinary Shares1.22K shares	8/20/2026	M · Option Exercise	−1.22K	0	—	0.00
NQ Stock Option Direct	Ordinary Shares523.00 shares	8/20/2026	M · Option Exercise	−523.00	158.40	—	18.29K
Restricted Share Unit Direct	Ordinary Shares2.31K shares	8/20/2026	A · Award	+2.31K	0	—	2.31K
Restricted Share Unit Direct	Ordinary Shares1.31K shares	8/20/2026	A · Award	+1.31K	0	—	1.31K
Restricted Share Unit Direct	Ordinary Shares393.00 shares	8/20/2026	A · Award	+393.00	0	—	393.00
NQ Stock Option Direct	Ordinary Shares6.15K shares	8/20/2026	A · Award	+6.15K	850.24	—	6.15K