Newamsterdam Pharma Company

NAMSNASDAQ · US

Holders

REDUCEDT+30
Kastelein Johannes Jacob Pieter
Newamsterdam Pharma Company · NASDAQ
−50,246 sh · $1.3M
Filed 2 Oct 2026SEC Form 4view source
ACQUIREDT+30
Kastelein Johannes Jacob Pieter
Newamsterdam Pharma Company · NASDAQ
+50,246 sh
Filed 2 Oct 2026SEC Form 4view source
ACQUIREDT+30
Davidson Michael H.
Newamsterdam Pharma Company · NASDAQ
+10,000 sh · $226.5K
Filed 15 Sept 2026SEC Form 4view source
REDUCEDStale
Smither John W
Newamsterdam Pharma Company · NASDAQ
−1,600 sh · $40.5K
Filed 9 Sept 2026SEC Form 4view source
ACQUIREDStale
Gunning Robert William
Newamsterdam Pharma Company · NASDAQ
+3,200 sh
Filed 3 Sept 2026SEC Form 4view source
DISCLOSEDQuarterly
Duquesne Family Office
Newamsterdam Pharma Company · NASDAQ
3,070,146 sh · $104.0M
Filed 30 Jun 2026SEC 13Fview source
DISCLOSEDQuarterly
Viking Global Investors
Newamsterdam Pharma Company · NASDAQ
4,203,567 sh · $142.5M
Filed 30 Jun 2026SEC 13Fview source
DISCLOSEDStale
Viking Global Investors
Newamsterdam Pharma Company · NASDAQ
4,203,567 sh · $134.6M
Filed 31 Mar 2026SEC 13Fview source
DISCLOSEDStale
Duquesne Family Office
Newamsterdam Pharma Company · NASDAQ
3,070,146 sh · $98.3M
Filed 31 Mar 2026SEC 13Fview source
DISCLOSEDStale
Viking Global Investors
Newamsterdam Pharma Company · NASDAQ
4,203,567 sh · $147.5M
Filed 31 Dec 2025SEC 13Fview source