BARTELS LAURA KATHLEEN (Chief Accounting Officer) exercised options at ARM HOLDINGS PLC /UK

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 3 exercises

BARTELS LAURA KATHLEEN

Filed: 5/19/2026ACC: 0001973239-26-000080

InsiderBARTELS LAURA KATHLEENCIK 2114104

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IssuerARM HOLDINGS PLC /UKCIK 1973239

Officer· Chief Accounting Officer

Since Mar 2026

+82.83K

Net shares

Net buyer

$707.6K

Total sold

Open market trades

0B · 0S

Total transactions

92.97K acquired · 10.14K disposed

Non-Derivative Transactions4

Ordinary Shares

Direct

M · Option Exercise

+3.59K

Price / share

—

Trade value

—

% of position

17.9%

5/15/2026

20.07K→23.65K

Ordinary Shares

Direct

M · Option Exercise

+862.00

Price / share

—

Trade value

—

% of position

3.6%

5/15/2026

23.65K→24.52K

Ordinary Shares

Direct

M · Option Exercise

+2.31K

Price / share

—

Trade value

—

% of position

9.4%

5/15/2026

24.52K→26.82K

Ordinary Shares

Direct

F · Tax Withholding

−3.38K

Price / share

$209.16

Trade value

$707.59K

% of position

12.6%

5/15/2026

26.82K→23.44K

Total

Net shares

+3.38K

Net value

-$707.59K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Ordinary Shares Direct	5/15/2026	M · Option Exercise	+3.59K	—	—	17.9%	20.07K	23.65K
Ordinary Shares Direct	5/15/2026	M · Option Exercise	+862.00	—	—	3.6%	23.65K	24.52K
Ordinary Shares Direct	5/15/2026	M · Option Exercise	+2.31K	—	—	9.4%	24.52K	26.82K
Ordinary Shares Direct	5/15/2026	F · Tax Withholding	−3.38K	$209.16	$707.59K	12.6%	26.82K	23.44K
Total			+3.38K		-$707.59K

Derivative Transactions5

Restricted Stock Units

Direct

A · Award

Converts to

Ordinary Shares

16.64K shares

+16.64K

Strike price

Held after

38.44K

Exercisable

—

5/15/2026

Restricted Stock Units

Direct

A · Award

Converts to

Ordinary Shares

69.57K shares

+69.57K

Strike price

Held after

108.01K

Exercisable

—

5/15/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Ordinary Shares

3.59K shares

−3.59K

Strike price

Held after

104.42K

Exercisable

—

5/15/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Ordinary Shares

862.00 shares

−862.00

Strike price

Held after

103.56K

Exercisable

—

5/15/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Ordinary Shares

2.31K shares

−2.31K

Strike price

Held after

101.25K

Exercisable

—

5/15/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Ordinary Shares16.64K shares	5/15/2026	A · Award	+16.64K	—	38.44K
Restricted Stock Units Direct	Ordinary Shares69.57K shares	5/15/2026	A · Award	+69.57K	—	108.01K
Restricted Stock Units Direct	Ordinary Shares3.59K shares	5/15/2026	M · Option Exercise	−3.59K	—	104.42K
Restricted Stock Units Direct	Ordinary Shares862.00 shares	5/15/2026	M · Option Exercise	−862.00	—	103.56K
Restricted Stock Units Direct	Ordinary Shares2.31K shares	5/15/2026	M · Option Exercise	−2.31K	—	101.25K