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About the data

© 2026 InsiderTradingScreener.com. Data from SEC EDGAR Form 4 filings.For informational purposes only. Not financial advice.

Home/Companies/NewAmsterdam Pharma Co N.V.

NewAmsterdam Pharma Co N.V.

115 insider trades tracked

NAMS

Insider trades

115

Bought (open market)

$335K

Sold (open market)

$71.8M

Acquired (grants)

$513K

Unique insiders

12

12-month activity

Monthly insider buy vs sell totals for NewAmsterdam Pharma Co N.V..

BuysSells

Recent insider trades

Most recent Form 4 filings for NewAmsterdam Pharma Co N.V..

Kooij Louise Frederikasold2,915 shares ofNAMSat $31.71$92KJul 22Details
Kooij Louise Frederikasold31,885 shares ofNAMSat $31.05$990KJul 22Details
Kooij Louise Frederikasold70,200 shares ofNAMSat $29.96$2.1MJul 22Details
Kooij Louise Frederikaexercised80,000 shares of

Insiders at this company

Executives and directors who have filed Form 4s.

Kooij Louise Frederika39 trades
Kastelein Johannes Jacob Pieter18 trades
Davidson Michael H.16 trades
Somaiya Mayur Ian11 trades
LANGE LOUIS G8 trades
Kling Douglas F6 trades
Topper James N4 trades
Smither John W3 trades

Explore insider screeners

Latest CEO & CFO Purchases Latest CEO & CFO Sales Director Purchases Officer Purchases Top Purchases This Week Top Sales This Week Top Officer Buys (Month)10% Owner Filings 10b5-1 Planned Trades Discretionary Trades Buy/Sell Ratios Politician–Insider Overlap

at $11.17

$894KJul 22Details

Kooij Louise Frederikaexercised25,000 shares ofNAMSat $11.9$298KJul 22Details

Kooij Louise Frederikasold300 shares ofNAMSat $30.73$9KJun 24Details

Kooij Louise Frederikasold39,700 shares ofNAMSat $30.2$1.2MJun 24Details

Kooij Louise Frederikaexercised15,000 shares ofNAMSat $11.9$179KJun 24Details

Kooij Louise Frederikaexercised25,000 shares ofNAMSat $10.9$273KJun 24Details

Kooij Louise Frederikasold65,000 shares ofNAMSat $35.69$2.3MMay 27Details

Kooij Louise Frederikaexercised5,000 shares ofNAMSat $10.9$55KMay 27Details

Kooij Louise Frederikaexercised60,000 shares ofNAMSat $10$600KMay 27Details

LANGE LOUIS Gsold446 shares ofNAMSat $31.23$14KMar 12Details

LANGE LOUIS Gsold44,173 shares ofNAMSat $30.41$1.3MMar 12Details

Kastelein Johannes Jacob Pietersold101,409 shares ofNAMSat $30.29$3.1MMar 9Details

Kastelein Johannes Jacob Pieterexercised101,409 shares ofNAMSMar 9Details

LANGE LOUIS Gtraded44,619 shares ofNAMSat $11.5$513KMar 10Details

Kastelein Johannes Jacob Pietersold94,124 shares ofNAMSat $30.32$2.9MMar 9Details

Kastelein Johannes Jacob Pieterexercised94,124 shares ofNAMSMar 9Details

LANGE LOUIS Gsold28,186 shares ofNAMSat $29.41$829KMar 10Details

Kastelein Johannes Jacob Pietersold104,467 shares ofNAMSat $30.3$3.2MMar 9Details

Kastelein Johannes Jacob Pieterexercised104,467 shares ofNAMSMar 9Details

Davidson Michael H.sold443,707 shares ofNAMSat $33.25$14.8MMar 2Details

Davidson Michael H.exercised443,707 shares ofNAMSMar 2Details

Davidson Michael H.sold17,924 shares ofNAMSat $34.44$617KFeb 26Details

Davidson Michael H.sold165,408 shares ofNAMSat $33.63$5.6MFeb 26Details

Davidson Michael H.exercised183,332 shares ofNAMSFeb 26Details

Davidson Michael H.sold1,300 shares ofNAMSat $36.68$48KFeb 26Details

Davidson Michael H.sold10,436 shares ofNAMSat $35.96$375KFeb 26Details

Davidson Michael H.sold46,517 shares ofNAMSat $35.11$1.6MFeb 26Details

View all trades for NAMS →

van der Kamp Hilde Johanna

3 trades

Lewis William3 trades

Gulfo Adele M.2 trades

McKenna Mark C.2 trades

NewAmsterdam Pharma Co N.V. (NAMS) — Insider Trading Activity | Insider Trading Screener