NAMS

Healthcare

NewAmsterdam Pharma Company N.V.

$28.88-0.94 (-3.15%)

Prev Close

$29.82

Open

$30.05

High

$30.74

Low

$28.76

Volume

795.4K

Market Cap

$3.48B

P/E

—

Div Yield

—

Over the past 12 months, insider activity at NewAmsterdam Pharma Company N.V. (NAMS) has been dominated by selling, with 5 insider purchases totaling $289.3K and 4 insider sales totaling $4.28M. The most recent insider transaction was by Kastelein Johannes Jacob Pieter (CTO), who sold $1.61M worth of shares on Feb 24, 2026. NewAmsterdam Pharma Company N.V. operates in the Healthcare sector, within the Biotechnology industry, with a market cap of $3.48B.

Buys (12M)

$289.3K

Sells (12M)

$4.28M

Net Activity

Net Seller

$3.99M

Active Insiders

last 12 mo

NAMS Price Chart

NAMS Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Feb 24, 2026↗	Kastelein Johannes Jacob Pieter	CTO	Sell	45,481	$35.31	$1.61M	84,289
Jan 23, 2026↗	Kooij Louise Frederika	Chief Accounting Officer	Sell	72,572	$33.29	$2.42M	0
Jan 5, 2026↗	Kooij Louise Frederika	Chief Accounting Officer	Sell	2,647	$33.25	$88.0K	0
Jan 5, 2026↗	Somaiya Mayur Ian	Chief Financial Officer	Sell	5,118	$33.25	$170.2K	0
Sep 15, 2025↗	Topper James N	Director	Buy	660	$23.70	$15.6K	0
Aug 11, 2025↗	Topper James N	Director	Buy	471	$23.98	$11.3K	0
Jun 24, 2025↗	Topper James N	Director	Buy	3,780	$18.38	$69.5K	0
Jun 16, 2025↗	Topper James N	Director	Buy	8,584	$19.50	$167.4K	0
Mar 26, 2025↗	Topper James N	Director	Buy	1,135	$22.49	$25.5K	0

NAMS Insider Buying Activity

The following table shows recent insider purchases of NewAmsterdam Pharma Company N.V. (NAMS) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value
Sep 15, 2025↗	Topper James N	Director	Buy	660	$23.70	$15.6K
Aug 11, 2025↗	Topper James N	Director	Buy	471	$23.98	$11.3K
Jun 24, 2025↗	Topper James N	Director	Buy	3,780	$18.38	$69.5K
Jun 16, 2025↗	Topper James N	Director	Buy	8,584	$19.50	$167.4K
Mar 26, 2025↗	Topper James N	Director	Buy	1,135	$22.49	$25.5K

NAMS Insider Selling Activity

The following table shows recent insider sales of NewAmsterdam Pharma Company N.V. (NAMS) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Feb 24, 2026↗	Kastelein Johannes Jacob Pieter	CTO	Sell	45,481	$35.31	$1.61M	84,289
Jan 23, 2026↗	Kooij Louise Frederika	Chief Accounting Officer	Sell	72,572	$33.29	$2.42M	0
Jan 5, 2026↗	Kooij Louise Frederika	Chief Accounting Officer	Sell	2,647	$33.25	$88.0K	0
Jan 5, 2026↗	Somaiya Mayur Ian	Chief Financial Officer	Sell	5,118	$33.25	$170.2K	0