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NASDAQ: NAMS
Newamsterdam Pharma Co Nv Stock Ownership - Who owns Newamsterdam Pharma Co Nv?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Newamsterdam Pharma Co Nv insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Johannes Jacob Pieter KasteleinCSci2026-09-3050,246$25.03
$1.26MSell
Michael H. DavidsonCEO2026-09-1410,000$22.65
$226.50kBuy
John W. SmitherDirector2026-09-041,600$25.32
$40.51kSell
Johannes Jacob Pieter KasteleinCSci2026-08-24125,000$26.91
$3.36MSell
Louise Frederika KooijCAO2026-07-2080,000$11.17
$893.60kBuy
Louise Frederika KooijCAO2026-07-2031,885$31.05
$990.03kSell
Louise Frederika KooijCAO2026-07-202,915$31.71
$92.43kSell
Louise Frederika KooijCAO2026-07-2070,200$29.96
$2.10MSell
Louise Frederika KooijCAO2026-07-2025,000$11.90
$297.50kBuy
Louise Frederika KooijChief Accounting Officer2026-06-2225,000$10.90
$272.50kBuy

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Net Insider Buy/Sell (L12M) Ownership

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NAMS Shareholders

What type of owners hold Newamsterdam Pharma Co Nv stock?

Institutional
Insider
Retail
NameHoldSharesValueType
James N. Topper12.24%14,630,524$333.58MInsider
Nap Bv Forgrowth8.91%10,656,172$242.96MInsider
Bain Capital Life Sciences Investors LLC8.76%10,473,913$238.81MInsider
James E. Flynn2.07%2,480,199$56.55MInsider
Michael H. Davidson1.65%1,973,132$44.99MInsider
Viking Global Investors LP0.78%932,052$21.25MInsider
Johannes Jacob Pieter Kastelein0.16%192,104$4.38MInsider
Mayur Ian Somaiya0.05%58,382$1.33MInsider
Michael F. Marino Iii0.05%55,000$1.25MInsider
Douglas F. Kling0.04%44,000$1.00MInsider

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NAMS vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
NAMS0.10%34.84%Net SellingNet Selling
PGEN0.04%81.77%Net SellingNet Selling
BEAM0.11%16.19%Net SellingNet Selling
MBX0.09%99.91%Net BuyingNet Selling
RXRX0.07%13.67%Net SellingNet Selling
View Top Biotech Stocks

Newamsterdam Pharma Co Nv Stock Ownership FAQ

Who owns Newamsterdam Pharma Co Nv?

Newamsterdam Pharma Co Nv (NASDAQ: NAMS) is owned by 0.10% institutional shareholders, 34.84% Newamsterdam Pharma Co Nv insiders, and 65.06% retail investors. James N. Topper is the largest individual Newamsterdam Pharma Co Nv shareholder, owning 14.63M shares representing 12.24% of the company. James N. Topper's Newamsterdam Pharma Co Nv shares are currently valued at $325.82M.

If you're new to stock investing, here's how to buy Newamsterdam Pharma Co Nv stock.
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