KLING DOUGLAS F (Chief Operating Officer) sold 69.1% of their position (98.61K shares) of NEWAMSTERDAM PHARMA CO N.V. on the open market

Open‑market sale worth $2.10M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 3 sales

KLING DOUGLAS F

Filed: 7/17/2025ACC: 0000950170-25-096665

InsiderKLING DOUGLAS FCIK 1699022

→

IssuerNEWAMSTERDAM PHARMA CO N.V.CIK 1936258

Officer· Chief Operating Officer

Since Dec 2023

-98.61K

Net shares

Net seller

$2.10M

Total sold

Open market trades

0B · 3S

Total transactions

98.61K acquired · 197.22K disposed

Non-Derivative Transactions5

Ordinary Shares

Direct

M · Option Exercise

+47.57K

Price / share

$10.90

Trade value

$518.50K

% of position

108.1%

7/15/2025

44K→91.57K

Ordinary Shares

Direct

S · Sale

−44.02K

Price / share

$21.38

Trade value

$941.25K

% of position

48.1%

7/15/2025

91.57K→47.54K

Ordinary Shares

Direct

S · Sale

−3.54K

Price / share

$22.12

Trade value

$78.39K

% of position

7.5%

7/15/2025

47.54K→44K

Ordinary Shares

Direct

M · Option Exercise

+51.04K

Price / share

$10.90

Trade value

$556.37K

% of position

116.0%

7/16/2025

44K→95.04K

Ordinary Shares

Direct

S · Sale

−51.04K

Price / share

$21.10

Trade value

$1.08M

% of position

53.7%

7/16/2025

95.04K→44K

Total

Net shares

+0.00

Net value

-$1.02M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Ordinary Shares Direct	7/15/2025	M · Option Exercise	+47.57K	$10.90	$518.50K	108.1%	44K	91.57K
Ordinary Shares Direct	7/15/2025	S · Sale	−44.02K	$21.38	$941.25K	48.1%	91.57K	47.54K
Ordinary Shares Direct	7/15/2025	S · Sale	−3.54K	$22.12	$78.39K	7.5%	47.54K	44K
Ordinary Shares Direct	7/16/2025	M · Option Exercise	+51.04K	$10.90	$556.37K	116.0%	44K	95.04K
Ordinary Shares Direct	7/16/2025	S · Sale	−51.04K	$21.10	$1.08M	53.7%	95.04K	44K
Total			+0.00		-$1.02M

Derivative Transactions2

Option (right to buy)

Direct

M · Option Exercise

Converts to

Ordinary Shares

47.57K shares

−47.57K

Strike price

10.90

Held after

213.75K

Exercisable

—

7/15/2025

Option (right to buy)

Direct

M · Option Exercise

Converts to

Ordinary Shares

51.04K shares

−51.04K

Strike price

10.90

Held after

162.70K

Exercisable

—

7/16/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Option (right to buy) Direct	Ordinary Shares47.57K shares	7/15/2025	M · Option Exercise	−47.57K	10.90	—	213.75K
Option (right to buy) Direct	Ordinary Shares51.04K shares	7/16/2025	M · Option Exercise	−51.04K	10.90	—	162.70K