NewAmsterdam Pharma Company N.V.

NAMS · Healthcare · NewAmsterdam Pharma Company N.V., a late-stage biopharmaceutical company, develops therapies to enhance patient care in populations with ca…

NewAmsterdam Pharma Company N.V. (NAMS), in the Healthcare sector, has 18 disclosed filings on Paydirt over the trailing twelve months from 5 corporate insiders: 1 purchase and 17 sales, 1 filed past the deadline. Filers took a median of 2 days from execution to disclosure, and the most recent trade was executed Sep 14 and filed Sep 15. The most active filer was Louise Frederika Kooij with 11 filings.

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Filings, ttm

1 buy · 17 sells · 1 late

Traders, ttm

5 insiders

Volume, ttmiDollar value disclosed in the window

$62.3M

estimated for Congress, as filed for insiders

Median delay

execution to disclosure

Last traded

Sep 14

Filed Sep 15

ADViAverage daily dollar volume

$32.2M

market data

Share price · 12M

$22.58 (-16.5%)

Adjusted for splits and dividends.

Volume by month

Buys $394K Sells $120.9M

Estimated for Congress, as filed for insiders · by filing month · past 24 months

Who filed

Louise Frederika Kooij Chief Accounting Officer 11 filings DK

Douglas F Kling Chief Operating Officer 9 filings MD

Michael H. Davidson Chief Executive Officer 5 filings JK

Johannes Jacob Pieter Kastelein Chief Scientific Officer 5 filings NF

NAP B.V. ForGrowth 10% owner 3 filings FV Forbion IV Management B.V. 10% owner 3 filings MS

Mayur Ian Somaiya Chief Financial Officer 3 filings FA Forbion Capital Fund IV Cooperatief U.A. 10% owner 2 filings

Recent filings

Michael H. DavidsonPURCHASE Chief Executive Officer $226K
10,000 sh × $22.65
Exec Sep 14
Filed Sep 15 · 4:30 PM ET Johannes Jacob Pieter KasteleinSALE Chief Scientific Officer $3.4M
125,000 sh × $26.91
Exec Aug 24
Filed Aug 25 · 4:30 PM ET Louise Frederika KooijSALE Chief Accounting Officer $3.1M
102,085 sh across 2 lots
Exec Jul 20
Filed Jul 22 · 4:05 PM ET Louise Frederika KooijSALE Chief Accounting Officer $1.2M
39,700 sh × $30.20
Exec Jun 22
Filed Jun 24 · 5:30 PM ET Louise Frederika KooijSALE Chief Accounting Officer $2.3M
65,000 sh × $35.69
Exec May 26
Filed May 27 · 5:30 PM ET Louis G LangeSALE Director $1.3M
44,173 sh × $30.41
Exec Mar 11
Filed Mar 12 · 5:30 PM ET Louis G LangeSALE Director $829K
28,186 sh × $29.41
Exec Mar 6
Filed Mar 10 · 5:30 PM ET Johannes Jacob Pieter KasteleinSALE Chief Scientific Officer $9.1M
300,000 sh across 3 lots
Exec Mar 5
Filed Mar 9 · 5:30 PM ET Michael H. DavidsonSALE Chief Executive Officer $14.8M
443,707 sh × $33.25
Exec Mar 2
Filed Mar 2 · 5:30 PM ET Michael H. DavidsonSALE Chief Executive Officer $10.5M
304,993 sh across 6 lots
Exec Feb 24
Filed Feb 26 · 5:30 PM ET Johannes Jacob Pieter KasteleinSALE Chief Scientific Officer $1.6M
45,481 sh across 2 lots
Exec Feb 20
Filed Feb 24 · 5:30 PM ET Louise Frederika KooijSALE Chief Accounting Officer $2.3M
72,428 sh across 2 lots
Exec Jan 27
Filed Jan 29 · 5:30 PM ET Louise Frederika KooijSALE Chief Accounting Officer $2.4M
72,263 sh across 3 lots
Exec Jan 23
Filed Jan 27 · 5:30 PM ET Mayur Ian SomaiyaSALE Chief Financial Officer $3.2M
99,100 sh across 4 lots
Exec Jan 20
Filed Jan 22 · 5:30 PM ET Michael H. DavidsonSALE Chief Executive Officer $411K
as filed
Exec Jan 7
Filed Jan 9 · 5:30 PM ET Mayur Ian SomaiyaSALE Chief Financial Officer $170K
5,118 sh × $33.25
Exec Jan 5
Filed Jan 7 · 5:30 PM ET Johannes Jacob Pieter KasteleinSALE Chief Scientific Officer $200K
6,000 sh × $33.25
Exec Jan 5
Filed Jan 7 · 5:30 PM ET Louise Frederika KooijSALE Chief Accounting Officer $5.2M
145,000 sh across 3 lots
Exec Dec 23 2025
Filed Dec 29 2025 · 5:30 PM ET † Louise Frederika KooijSALE Chief Accounting Officer $3.9M
150,000 sh across 2 lots
Exec Sep 9 2025
Filed Sep 10 2025 · 5:30 PM ET Louise Frederika KooijSALE Chief Accounting Officer $453K
18,073 sh × $25.09
Exec Sep 3 2025
Filed Sep 5 2025 · 5:30 PM ET Louise Frederika KooijSALE Chief Accounting Officer $206K
8,269 sh × $24.86
Exec Aug 25 2025
Filed Aug 27 2025 · 5:30 PM ET Johannes Jacob Pieter KasteleinSALE Chief Scientific Officer $2.5M
100,000 sh across 3 lots
Exec Aug 21 2025
Filed Aug 25 2025 · 5:30 PM ET Douglas F KlingSALE Chief Operating Officer $2.0M
95,068 sh across 2 lots
Exec Jul 15 2025
Filed Jul 17 2025 · 5:30 PM ET Douglas F KlingSALE Chief Operating Officer $1.9M
100,000 sh across 2 lots
Exec Jun 16 2025
Filed Jun 18 2025 · 5:30 PM ET James N TopperPURCHASE Director $167K
8,584 sh × $19.50
Exec Jun 16 2025
Filed Jun 18 2025 · 5:30 PM ET