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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 KasteleinCSci2026-08-24125,000$26.91
$3.36MSell
Louise Frederika KooijCAO2026-07-2031,885$31.05
$990.03kSell
Louise Frederika KooijCAO2026-07-202,915$31.71
$92.43kSell
Louise Frederika KooijCAO2026-07-2025,000$11.90
$297.50kBuy
Louise Frederika KooijCAO2026-07-2080,000$11.17
$893.60kBuy
Louise Frederika KooijCAO2026-07-2070,200$29.96
$2.10MSell
Louise Frederika KooijChief Accounting Officer2026-06-22300$30.73
$9.22kSell
Louise Frederika KooijChief Accounting Officer2026-06-2239,700$30.20
$1.20MSell
Louise Frederika KooijChief Accounting Officer2026-06-2215,000$11.90
$178.50kBuy
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$371.62MInsider
Nap Bv Forgrowth8.91%10,656,172$270.67MInsider
Bain Capital Life Sciences Investors LLC8.76%10,473,913$266.04MInsider
James E. Flynn2.07%2,480,199$63.00MInsider
Michael H. Davidson0.89%1,068,638$27.14MInsider
Viking Global Investors LP0.78%932,052$23.67MInsider
Johannes Jacob Pieter Kastelein0.16%192,104$4.88MInsider
Mayur Ian Somaiya0.05%58,382$1.48MInsider
Michael F. Marino Iii0.05%55,000$1.40MInsider
Douglas F. Kling0.04%44,000$1.12MInsider

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NAMS vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
NAMS0.10%34.08%Net SellingNet Selling
IMNM0.10%4.06%Net SellingNet Selling
IRON0.11%65.19%Net SellingNet Selling
BEAM0.11%16.19%Net SellingNet Selling
ARQT0.10%30.69%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, 34.08% Newamsterdam Pharma Co Nv insiders, and 65.81% 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 $371.62M.

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