NewAmsterdam Pharma Co N.V. (NAMS)

Latest Insider Confidence Score

2026Q1

44.4
Bearish

Company insider confidence (by quarter)

2023Q4 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Forbion Growth Opportunities Fund I Cooperatief U.A. — 11,831,461 Jan 2, 2024
Forbion Growth Management B.V. — 11,831,461 Jan 2, 2024
ForGrowth NAP B.V. — 11,831,461 Jan 2, 2024
Forbion Capital Fund IV Cooperatief U.A. — 11,831,461 Jan 2, 2024
Forbion IV Management B.V. — 11,831,461 Jan 2, 2024

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 2, 2026 Mar 2, 2026 Davidson Michael H. CEO Sell 15.0 -443,707 -71.81% ✗ $14.8M
Feb 24, 2026 Feb 26, 2026 Davidson Michael H. CEO Sell 15.0 -306,293 -8.61% ✗ $10.6M
Feb 20, 2026 Feb 24, 2026 Kastelein Johannes Jacob Pieter Chief Scientific Officer Sell 17.5 -45,481 -45.95% ✗ $1.6M
Jan 27, 2026 Jan 29, 2026 Kooij Louise Frederika Chief Accounting Officer Sell 17.5 -72,428 -59.79% ✗ $2.3M
Jan 23, 2026 Jan 27, 2026 Kooij Louise Frederika Chief Accounting Officer Sell 17.5 -72,572 -39.64% ✗ $2.4M
Jan 20, 2026 Jan 22, 2026 Somaiya Mayur Ian CFO Sell 13.8 -100,000 -20.19% ✓ $3.3M
Jan 7, 2026 Jan 9, 2026 van der Kamp Hilde Johanna Director Neutral 90.0 +3,400 48.85% ✗ -
Jan 7, 2026 Jan 9, 2026 Gulfo Adele M. Director Neutral 90.0 +3,400 31.31% ✗ -
Jan 7, 2026 Jan 9, 2026 Davidson Michael H. CEO Neutral 90.0 +69,418 17.78% ✗ -
Jan 7, 2026 Jan 9, 2026 Lewis William Director Neutral 90.0 +3,400 48.85% ✗ -
Jan 7, 2026 Jan 9, 2026 Smither John W Director Neutral 90.0 +3,400 48.85% ✗ -
Jan 7, 2026 Jan 9, 2026 McKenna Mark C. Director Neutral 90.0 +3,400 48.85% ✗ -
Jan 7, 2026 Jan 9, 2026 LANGE LOUIS G Director Neutral 90.0 +3,400 48.85% ✗ -
Jan 5, 2026 Jan 7, 2026 Kastelein Johannes Jacob Pieter Chief Scientific Officer Sell 95.0 +19,500 24.53% ✗ $199.5K
Jan 5, 2026 Jan 7, 2026 Kooij Louise Frederika Chief Accounting Officer Sell 95.0 +9,353 62.35% ✗ $88K
Jan 5, 2026 Jan 7, 2026 Somaiya Mayur Ian CFO Sell 95.0 +20,382 53.64% ✗ $170.2K
Dec 23, 2025 Dec 29, 2025 Kooij Louise Frederika Chief Accounting Officer Sell 16.3 -145,000 -76.32% ✗ $5.2M
Aug 20, 2024 Aug 22, 2024 Davidson Michael H. CEO Buy 72.5 +5,000 0.61% ✗ $81.4K
Jul 17, 2024 Jul 19, 2024 McKenna Mark C. Director Neutral 52.5 - 0.00% ✗ -
Jul 19, 2024 Joustra Wouter Director Neutral 52.5 - 0.00% ✗ -
Jul 19, 2024 McKenna Mark C. Director Neutral 52.5 - 0.00% ✗ -
Jun 20, 2024 Jun 24, 2024 Davidson Michael H. CEO Buy 72.5 +5,000 0.62% ✗ $86.3K
May 3, 2024 JONES WILLIAM A JR Chief Commercial Officer Neutral 52.5 - 0.00% ✗ -
Apr 1, 2024 Apr 2, 2024 Audet Juliette Berangere Chief Business Officer Neutral 52.5 - 0.00% ✗ -
Mar 26, 2024 Mar 28, 2024 Topper James N Director Buy 60.0 +8,429 0.12% ✗ $181.2K
Mar 26, 2024 Mar 27, 2024 Kastelein Johannes Jacob Pieter Chief Scientific Officer Sell 17.5 -201,673 -100.00% ✗ $4.3M
Feb 13, 2024 Feb 21, 2024 LANGE LOUIS G Director Buy 95.0 +5,000 25.15% ✗ $95K
Jan 25, 2024 Davidson Michael H. CEO Neutral 52.5 - 0.00% ✗ -
Jan 25, 2024 LANGE LOUIS G Director Neutral 52.5 - 0.00% ✗ -
Jan 4, 2024 Jan 8, 2024 Lewis William Director Neutral 52.5 - 0.00% ✗ -
Jan 8, 2024 Lewis William Director Neutral 52.5 - 0.00% ✗ -
Jan 1, 2024 Jan 3, 2024 Kooij Louise Frederika Chief Accounting Officer Neutral 52.5 - 0.00% ✗ -
Jan 1, 2024 Jan 3, 2024 Kling Douglas F COO Neutral 52.5 - 0.00% ✗ -
Jan 1, 2024 Jan 3, 2024 van der Kamp Hilde Johanna Director Neutral 52.5 - 0.00% ✗ -
Jan 1, 2024 Jan 3, 2024 LANGE LOUIS G Director Neutral 52.5 - 0.00% ✗ -
Jan 1, 2024 Jan 3, 2024 Kastelein Johannes Jacob Pieter Chief Scientific Officer Neutral 52.5 - 0.00% ✗ -
Jan 1, 2024 Jan 3, 2024 Davidson Michael H. CEO Neutral 52.5 - 0.00% ✗ -
Jan 1, 2024 Jan 3, 2024 Smither John W Director Neutral 52.5 - 0.00% ✗ -
Jan 1, 2024 Jan 3, 2024 Somaiya Mayur Ian CFO Neutral 52.5 - 0.00% ✗ -
Jan 2, 2024 ForGrowth NAP B.V. 10% Owner Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Bain Capital Life Sciences Investors, LLC 10% Owner Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Downing Nicholas Director Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Audet Juliette Berangere Director Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Smither John W Director Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Topper James N Director Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Kastelein Johannes Jacob Pieter Chief Scientific Officer Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Kling Douglas F COO Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Davidson Michael H. CEO Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Slootweg Hugo Alexander Director Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Kooij Louise Frederika Chief Accounting Officer Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 LANGE LOUIS G Director Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Somaiya Mayur Ian CFO Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 van der Kamp Hilde Johanna Director Neutral 52.5 - 0.00% ✗ -