NEWAMSTERDAM PHARMA CO NV (NAMS) Stock Ownership

USA • Nasdaq • NASDAQ:NAMS • NL00150012L7

32.99 USD
+1.42 (+4.5%)
At close: Feb 3, 2026
33.34 USD
+0.35 (+1.06%)
After Hours: 2/3/2026, 8:00:02 PM
NAMS Ownership Chart.NAMS Ownership Chart: showing Insider, Institutional ownership and shares available to the public.NAMS Ownership.InsiderInstitutionalPublic



Shares Outstanding113.39M
Float96.20M
Float Short Interest PercentageN/A
Owners (insider)0.39%
Owners (institutional)89.56%
Owners (insider) change15.12%
Owners (institutional) change-0.72%
NAMS Institutional Ownership HistoryNAMS Institutional Ownership HistoryNAMS Institutional Ownership History Dec 2022 Mar 2023 Jun 2023 Sep 2023 Dec 2023 Mar 2024 Jun 2024 Sep 2024 Dec 2024 Mar 2025 Jun 2025 Sep 2025 Dec 2025 20M 40M 60M 80M 100M
NAMS Historical Insider Transactions ChartNAMS Historical Insider Buy and Sell Transactions ChartNAMS Historical Insider Transactions Mar 2025 Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025 Jan 2026 Feb 2026 0 200K -200K 400K
Date Name Type Shares Price Amount
Jan 27, 2026 Kooij Louise Frederika Open Market Sale 72428 32.25 $ 2,335,859.52
Jan 27, 2026 Kooij Louise Frederika Option Excercise 72428 10.90 $ 789,465.20
Jan 23, 2026 Kooij Louise Frederika Option Excercise 72572 10.90 $ 791,034.80
Jan 23, 2026 Kooij Louise Frederika Open Market Sale 72572 33.29 $ 2,415,843.11
Jan 20, 2026 Somaiya Mayur Ian Option Excercise 100000 9.26 $ 926,000.00
Jan 20, 2026 Somaiya Mayur Ian Open Market Sale 100000 32.61 $ 3,260,617.98
Jan 7, 2026 Kastelein Johannes Jacob Pieter Grant 25500 $ 0.00
Jan 7, 2026 Kooij Louise Frederika Grant 12000 $ 0.00
Jan 7, 2026 Somaiya Mayur Ian Grant 25500 $ 0.00
Jan 7, 2026 Davidson Michael H. Open Market Sale 11582 $ 0.00
Jan 7, 2026 Davidson Michael H. Grant 81000 $ 0.00
Jan 7, 2026 Lewis William Grant 3400 $ 0.00
Jan 7, 2026 Smither John W Grant 3400 $ 0.00
Jan 7, 2026 McKenna Mark C. Grant 3400 $ 0.00
Jan 7, 2026 van der Kamp Hilde Johanna Grant 3400 $ 0.00
Jan 7, 2026 Gulfo Adele M. Grant 3400 $ 0.00
Jan 7, 2026 LANGE LOUIS G Grant 3400 $ 0.00
Jan 5, 2026 Kastelein Johannes Jacob Pieter Open Market Sale 6000 33.25 $ 199,500.00
Jan 5, 2026 Kooij Louise Frederika Open Market Sale 2647 33.25 $ 88,012.75
Jan 5, 2026 Somaiya Mayur Ian Open Market Sale 5118 33.25 $ 170,173.50
Dec 23, 2025 Kooij Louise Frederika Option Excercise 145000 10.03 $ 1,454,500.00
Dec 23, 2025 Kooij Louise Frederika Open Market Sale 145000 35.84 $ 5,196,740.65
Sep 9, 2025 Kooij Louise Frederika Option Excercise 150000 10.00 $ 1,500,000.00
Sep 9, 2025 Kooij Louise Frederika Open Market Sale 150000 25.83 $ 3,874,016.80
Sep 8, 2025 Topper James N Open Market Purchase 1260 24.99 $ 31,487.40
Sep 3, 2025 Kooij Louise Frederika Open Market Sale 18073 25.09 $ 453,451.57
Sep 2, 2025 Kooij Louise Frederika Option Excercise 18073 $ 0.00
Aug 25, 2025 Kooij Louise Frederika Open Market Sale 8269 24.86 $ 205,567.34
Aug 21, 2025 Kastelein Johannes Jacob Pieter Open Market Sale 100000 24.72 $ 2,471,639.78
Aug 11, 2025 Topper James N Open Market Purchase 471 23.98 $ 11,293.97
Jul 15, 2025 Kling Douglas F Option Excercise 98612 10.90 $ 1,074,870.80
Jul 15, 2025 Kling Douglas F Open Market Sale 98612 21.26 $ 2,096,655.08
Jun 24, 2025 Topper James N Open Market Purchase 3780 18.38 $ 69,466.07
Jun 16, 2025 Topper James N Open Market Purchase 8584 19.50 $ 167,381.13
Jun 16, 2025 Kling Douglas F Option Excercise 100000 10.20 $ 1,019,709.10
Jun 16, 2025 Kling Douglas F Open Market Sale 100000 19.29 $ 1,929,141.04
Jun 1, 2025 Marino Michael F III Grant 55000 $ 0.00
Jun 1, 2025 LANGE LOUIS G Option Excercise 68 0.00 $ 0.00
May 15, 2025 Kling Douglas F Option Excercise 100000 10.00 $ 1,000,000.00
May 15, 2025 Kling Douglas F Open Market Sale 100000 $ 0.00
May 1, 2025 LANGE LOUIS G Option Excercise 69 0.00 $ 0.00
Apr 15, 2025 Kling Douglas F Option Excercise 100000 10.00 $ 1,000,000.00
Apr 15, 2025 Kling Douglas F Open Market Sale 100000 $ 0.00
Apr 15, 2025 Gulfo Adele M. Grant 10860 $ 0.00
Mar 26, 2025 LANGE LOUIS G Option Excercise 3102 0.00 $ 0.00
Mar 26, 2025 Kastelein Johannes Jacob Pieter Grant 19302 0.00 $ 0.00
Mar 26, 2025 Kastelein Johannes Jacob Pieter Option Excercise 45481 0.00 $ 0.00
Mar 26, 2025 Kling Douglas F Option Excercise 16539 0.00 $ 0.00
Mar 26, 2025 Kling Douglas F Open Market Sale 16539 $ 0.00
Mar 26, 2025 Davidson Michael H. Grant 30992 0.00 $ 0.00
Mar 26, 2025 Davidson Michael H. Option Excercise 38394 0.00 $ 0.00
Mar 26, 2025 Davidson Michael H. Open Market Sale 12258 $ 0.00
Mar 26, 2025 Topper James N Open Market Purchase 1135 22.49 $ 25,520.59
Mar 26, 2025 Kooij Louise Frederika Option Excercise 8269 0.00 $ 0.00
Mar 24, 2025 Kastelein Johannes Jacob Pieter Option Excercise 150000 $ 0.00
Mar 17, 2025 Kling Douglas F Option Excercise 100000 1.19 $ 118,880.00
Mar 17, 2025 Kling Douglas F Open Market Sale 100000 $ 0.00
Mar 4, 2025 Kooij Louise Frederika Option Excercise 150000 $ 0.00
Mar 4, 2025 Kooij Louise Frederika Open Market Sale 150000 20.37 $ 3,055,500.00
Mar 4, 2025 Topper James N Open Market Purchase 4005 21.02 $ 84,203.12
Feb 18, 2025 Kling Douglas F Option Excercise 100000 $ 0.00
Feb 18, 2025 Kling Douglas F Open Market Sale 100000 $ 0.00