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Home/Companies/NewAmsterdam Pharma Company N.V.

NewAmsterdam Pharma Company N.V.

121 insider trades tracked

NAMS
Insider trades
121
Bought (open market)
$561K
Sold (open market)
$75.2M
Acquired (grants)
$513K
Unique insiders
13

12-month activity

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

BuysSells
Show data table
MonthBuysSellsFilings
October 2025$0$00
November 2025$0$00
December 2025$0$5.2M7
January 2026$0$8.5M41
February 2026$0$12.2M12
March 2026$0$26M12
April 2026$0$00
May 2026$0$2.3M3
June 2026$0$1.2M4
July 2026$0$3.2M5
August 2026$0$3.4M2
September 2026$227K$41K4

Recent insider trades

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

  • Davidson Michael H.bought10,000 shares ofNAMSat $22.65$227KSep 14 · filed Sep 15Details
  • Smither John Wsold1,600 shares ofNAMSat $25.32$41KSep 4 · filed Sep 9Details
  • Gunning Robert Williamgranted14,000 shares ofNAMSat $0Sep 1 · filed

Insiders at this company

Executives and directors who have filed Form 4s.

  • Kooij Louise Frederika39 trades
  • Kastelein Johannes Jacob Pieter20 trades
  • Davidson Michael H.17 trades
  • Somaiya Mayur Ian11 trades
  • LANGE LOUIS G8 trades
  • Kling Douglas F6 trades
  • Smither John W4 trades
  • Topper James N4 trades

Explore insider screeners

Latest CEO & CFO PurchasesLatest CEO & CFO SalesDirector PurchasesOfficer PurchasesTop Purchases This WeekTop Sales This WeekTop Officer Buys (Month)10% Owner Filings10b5-1 Planned TradesDiscretionary TradesBuy/Sell RatiosPolitician-Insider Overlap
Sep 3
Details
  • Gunning Robert Williamgranted3,200 shares ofNAMSat $0Sep 1 · filed Sep 3Details
  • Kastelein Johannes Jacob Pietersold125,000 shares ofNAMSat $26.91$3.4MAug 24 · filed Aug 25Details
  • Kastelein Johannes Jacob Pieterexercised125,000 shares ofNAMSAug 24 · filed Aug 25Details
  • Kooij Louise Frederikasold2,915 shares ofNAMSat $31.71$92KJul 20 · filed Jul 22Details
  • Kooij Louise Frederikasold31,885 shares ofNAMSat $31.05$990KJul 20 · filed Jul 22Details
  • Kooij Louise Frederikasold70,200 shares ofNAMSat $29.96$2.1MJul 20 · filed Jul 22Details
  • Kooij Louise Frederikaexercised80,000 shares ofNAMSat $11.17$894KJul 20 · filed Jul 22Details
  • Kooij Louise Frederikaexercised25,000 shares ofNAMSat $11.9$298KJul 20 · filed Jul 22Details
  • Kooij Louise Frederikasold300 shares ofNAMSat $30.73$9KJun 22 · filed Jun 24Details
  • Kooij Louise Frederikasold39,700 shares ofNAMSat $30.2$1.2MJun 22 · filed Jun 24Details
  • Kooij Louise Frederikaexercised15,000 shares ofNAMSat $11.9$179KJun 22 · filed Jun 24Details
  • Kooij Louise Frederikaexercised25,000 shares ofNAMSat $10.9$273KJun 22 · filed Jun 24Details
  • Kooij Louise Frederikasold65,000 shares ofNAMSat $35.69$2.3MMay 26 · filed May 27Details
  • Kooij Louise Frederikaexercised5,000 shares ofNAMSat $10.9$55KMay 26 · filed May 27Details
  • Kooij Louise Frederikaexercised60,000 shares ofNAMSat $10$600KMay 26 · filed May 27Details
  • LANGE LOUIS Gsold446 shares ofNAMSat $31.23$14KMar 11 · filed Mar 12Details
  • LANGE LOUIS Gsold44,173 shares ofNAMSat $30.41$1.3MMar 11 · filed Mar 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 9 · filed Mar 10Details
  • Kastelein Johannes Jacob Pietersold94,124 shares ofNAMSat $30.32$2.9MMar 6 · filed Mar 9Details
  • Kastelein Johannes Jacob Pieterexercised94,124 shares ofNAMSMar 6 · filed Mar 9Details
  • LANGE LOUIS Gsold28,186 shares ofNAMSat $29.41$829KMar 6 · filed Mar 10Details
  • Kastelein Johannes Jacob Pietersold104,467 shares ofNAMSat $30.3$3.2MMar 5 · filed Mar 9Details
  • Kastelein Johannes Jacob Pieterexercised104,467 shares ofNAMSMar 5 · filed Mar 9Details
  • Davidson Michael H.sold443,707 shares ofNAMSat $33.25$14.8MMar 2Details
  • Davidson Michael H.exercised443,707 shares ofNAMSMar 2Details
  • 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
  • Gunning Robert William2 trades