ROMANO GIANLUCA (EVP & CFO) sold 24.2% of their position (9.08K shares) of SEAGATE TECHNOLOGY HOLDINGS PLC on the open market

Open‑market sale worth $7.71M — a significant reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 3 sales

ROMANO GIANLUCA

Filed: 8/24/2026ACC: 0001137789-26-000183

InsiderROMANO GIANLUCACIK 1764650

→

IssuerSEAGATE TECHNOLOGY HOLDINGS PLCCIK 1137789

Officer· EVP & CFO

Since Jan 2019

+8.90K

Net shares

Net buyer

$7.71M

Total sold

Open market trades

0B · 3S

Total transactions

34.88K acquired · 25.98K disposed

Non-Derivative Transactions6

Ordinary Shares

Direct

M · Option Exercise

+5.04K

Price / share

—

Trade value

—

% of position

24.4%

8/20/2026

20.66K→25.70K

Ordinary Shares

Direct

M · Option Exercise

+9.13K

Price / share

—

Trade value

—

% of position

39.7%

8/20/2026

23K→32.13K

Ordinary Shares

Direct

M · Option Exercise

+2.74K

Price / share

—

Trade value

—

% of position

10.1%

8/20/2026

27.23K→29.96K

Ordinary Shares

Direct

S · Sale

−2.71K

Price / share

$849.35

Trade value

$2.30M

% of position

10.5%

8/21/2026

25.70K→23K

Ordinary Shares

Direct

S · Sale

−4.90K

Price / share

$849.35

Trade value

$4.16M

% of position

15.3%

8/21/2026

32.13K→27.23K

Ordinary Shares

Direct

S · Sale

−1.47K

Price / share

$849.35

Trade value

$1.25M

% of position

4.9%

8/21/2026

29.96K→28.49K

Total

Net shares

+7.83K

Net value

-$7.71M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Ordinary Shares Direct	8/20/2026	M · Option Exercise	+5.04K	—	—	24.4%	20.66K	25.70K
Ordinary Shares Direct	8/20/2026	M · Option Exercise	+9.13K	—	—	39.7%	23K	32.13K
Ordinary Shares Direct	8/20/2026	M · Option Exercise	+2.74K	—	—	10.1%	27.23K	29.96K
Ordinary Shares Direct	8/21/2026	S · Sale	−2.71K	$849.35	$2.30M	10.5%	25.70K	23K
Ordinary Shares Direct	8/21/2026	S · Sale	−4.90K	$849.35	$4.16M	15.3%	32.13K	27.23K
Ordinary Shares Direct	8/21/2026	S · Sale	−1.47K	$849.35	$1.25M	4.9%	29.96K	28.49K
Total			+7.83K		-$7.71M

Derivative Transactions7

Restricted Share Unit

Direct

M · Option Exercise

Converts to

Ordinary Shares

5.04K shares

−5.04K

Strike price

Held after

15.12K

Exercisable

—

8/20/2026

Restricted Share Unit

Direct

M · Option Exercise

Converts to

Ordinary Shares

9.13K shares

−9.13K

Strike price

Held after

0.00

Exercisable

—

8/20/2026

Restricted Share Unit

Direct

M · Option Exercise

Converts to

Ordinary Shares

2.74K shares

−2.74K

Strike price

Held after

0.00

Exercisable

—

8/20/2026

Restricted Share Unit

Direct

A · Award

Converts to

Ordinary Shares

4.26K shares

+4.26K

Strike price

Held after

4.26K

Exercisable

—

8/20/2026

Restricted Share Unit

Direct

A · Award

Converts to

Ordinary Shares

1.81K shares

+1.81K

Strike price

Held after

1.81K

Exercisable

—

8/20/2026

Restricted Share Unit

Direct

A · Award

Converts to

Ordinary Shares

543.00 shares

+543.00

Strike price

Held after

543.00

Exercisable

—

8/20/2026

NQ Stock Options

Direct

A · Award

Converts to

Ordinary Shares

11.36K shares

+11.36K

Strike price

850.24

Held after

11.36K

Exercisable

—

8/20/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Share Unit Direct	Ordinary Shares5.04K shares	8/20/2026	M · Option Exercise	−5.04K	0	—	15.12K
Restricted Share Unit Direct	Ordinary Shares9.13K shares	8/20/2026	M · Option Exercise	−9.13K	0	—	0.00
Restricted Share Unit Direct	Ordinary Shares2.74K shares	8/20/2026	M · Option Exercise	−2.74K	0	—	0.00
Restricted Share Unit Direct	Ordinary Shares4.26K shares	8/20/2026	A · Award	+4.26K	0	—	4.26K
Restricted Share Unit Direct	Ordinary Shares1.81K shares	8/20/2026	A · Award	+1.81K	0	—	1.81K
Restricted Share Unit Direct	Ordinary Shares543.00 shares	8/20/2026	A · Award	+543.00	0	—	543.00
NQ Stock Options Direct	Ordinary Shares11.36K shares	8/20/2026	A · Award	+11.36K	850.24	—	11.36K