SOMAIYA MAYUR IAN (Chief Financial Officer) sold 63.1% of their position (100K shares) of NEWAMSTERDAM PHARMA CO N.V. on the open market

Open‑market sale worth $3.26M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 5 sales

SOMAIYA MAYUR IAN

Filed: 1/22/2026ACC: 0001193125-26-019686

InsiderSOMAIYA MAYUR IANCIK 1760303

→

IssuerNEWAMSTERDAM PHARMA CO N.V.CIK 1936258

Officer· Chief Financial Officer

Since Dec 2023

-100K

Net shares

Net seller

$3.26M

Total sold

Open market trades

0B · 5S

Total transactions

100K acquired · 200K disposed

Non-Derivative Transactions7

Ordinary Shares

Direct

M · Option Exercise

+60.22K

Price / share

$9.26

Trade value

$557.60K

% of position

103.1%

1/20/2026

58.38K→118.60K

Ordinary Shares

Direct

S · Sale

−900.00

Price / share

$30.64

Trade value

$27.58K

% of position

0.8%

1/20/2026

118.60K→117.70K

Ordinary Shares

Direct

S · Sale

−39.71K

Price / share

$31.78

Trade value

$1.26M

% of position

33.7%

1/20/2026

117.70K→77.99K

Ordinary Shares

Direct

S · Sale

−19.60K

Price / share

$32.38

Trade value

$634.78K

% of position

25.1%

1/20/2026

77.99K→58.38K

Ordinary Shares

Direct

M · Option Exercise

+39.78K

Price / share

$9.26

Trade value

$368.40K

% of position

68.1%

1/21/2026

58.38K→98.17K

Ordinary Shares

Direct

S · Sale

−15.42K

Price / share

$33.25

Trade value

$512.78K

% of position

15.7%

1/21/2026

98.17K→82.74K

Ordinary Shares

Direct

S · Sale

−24.36K

Price / share

$33.80

Trade value

$823.44K

% of position

29.4%

1/21/2026

82.74K→58.38K

Total

Net shares

+0.00

Net value

-$2.33M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Ordinary Shares Direct	1/20/2026	M · Option Exercise	+60.22K	$9.26	$557.60K	103.1%	58.38K	118.60K
Ordinary Shares Direct	1/20/2026	S · Sale	−900.00	$30.64	$27.58K	0.8%	118.60K	117.70K
Ordinary Shares Direct	1/20/2026	S · Sale	−39.71K	$31.78	$1.26M	33.7%	117.70K	77.99K
Ordinary Shares Direct	1/20/2026	S · Sale	−19.60K	$32.38	$634.78K	25.1%	77.99K	58.38K
Ordinary Shares Direct	1/21/2026	M · Option Exercise	+39.78K	$9.26	$368.40K	68.1%	58.38K	98.17K
Ordinary Shares Direct	1/21/2026	S · Sale	−15.42K	$33.25	$512.78K	15.7%	98.17K	82.74K
Ordinary Shares Direct	1/21/2026	S · Sale	−24.36K	$33.80	$823.44K	29.4%	82.74K	58.38K
Total			+0.00		-$2.33M

Derivative Transactions2

Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Ordinary Shares

60.22K shares

−60.22K

Strike price

9.26

Held after

702.60K

Exercisable

—

1/20/2026

Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Ordinary Shares

39.78K shares

−39.78K

Strike price

9.26

Held after

662.81K

Exercisable

—

1/21/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Option (Right to Buy) Direct	Ordinary Shares60.22K shares	1/20/2026	M · Option Exercise	−60.22K	9.26	—	702.60K
Option (Right to Buy) Direct	Ordinary Shares39.78K shares	1/21/2026	M · Option Exercise	−39.78K	9.26	—	662.81K