NewAmsterdam Pharma Company N.V. Ordinary Shares (NAMS)
Insider transactions
A complete record of Form 4 filings tracking every share acquisition and disposal by executives, directors, and senior officers. Filterable by date range and transaction type, the table exposes the direct market actions of those with the deepest knowledge of a company's operations — providing a factual, data-driven signal of internal conviction that complements traditional fundamental and technical analysis.
Transaction date | Executive | Executive Title | Security Type | Acquisition / Disposal | Shares | Share price |
|---|---|---|---|---|---|---|
| Sep 14, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Acquisition | 10,000 | 22.65 |
| Sep 4, 2026 | SMITHER, JOHN W | Director | Ordinary Shares | Disposal | 1,600 | 25.32 |
| Sep 1, 2026 | GUNNING, ROBERT WILLIAM | Vice President, Controller | Option (right to buy) | Acquisition | 14,000 | 0 |
| Sep 1, 2026 | GUNNING, ROBERT WILLIAM | Vice President, Controller | Ordinary Shares | Acquisition | 3,200 | 0 |
| Aug 24, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Disposal | 125,000 | 26.91 |
| Aug 24, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Acquisition | 125,000 | |
| Aug 24, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Option (right to buy) | Disposal | 125,000 | 0 |
| Jul 20, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 25,000 | 11.9 |
| Jul 20, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 80,000 | 0 |
| Jul 20, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 70,200 | 29.96 |
| Jul 20, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 80,000 | 11.17 |
| Jul 20, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 2,915 | 31.71 |
| Jul 20, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 31,885 | 31.05 |
| Jul 20, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 25,000 | 0 |
| Jun 22, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 15,000 | 11.9 |
| Jun 22, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 25,000 | 10.9 |
| Jun 22, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 39,700 | 30.2 |
| Jun 22, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 15,000 | 0 |
| Jun 22, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 300 | 30.73 |
| Jun 22, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 25,000 | 0 |
| May 26, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 5,000 | 0 |
| May 26, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 60,000 | 0 |
| May 26, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 60,000 | 10 |
| May 26, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 5,000 | 10.9 |
| May 26, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 65,000 | 35.69 |
| Mar 11, 2026 | LANGE, LOUIS G | Director | Ordinary Shares | Disposal | 446 | 31.23 |
| Mar 11, 2026 | LANGE, LOUIS G | Director | Ordinary Shares | Disposal | 44,173 | 30.41 |
| Mar 9, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Disposal | 101,409 | 30.29 |
| Mar 9, 2026 | LANGE, LOUIS G | Director | Ordinary Shares | Acquisition | 44,619 | 11.5 |
| Mar 9, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Acquisition | 101,409 | |
| Mar 9, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Option (right to buy) | Disposal | 101,409 | 0 |
| Mar 9, 2026 | LANGE, LOUIS G | Director | Warrant (right to buy) | Disposal | 44,619 | 0 |
| Mar 6, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Acquisition | 94,124 | |
| Mar 6, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Option (right to buy) | Disposal | 94,124 | 0 |
| Mar 6, 2026 | LANGE, LOUIS G | Director | Ordinary Shares | Disposal | 28,186 | 29.41 |
| Mar 6, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Disposal | 94,124 | 30.32 |
| Mar 5, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Option (right to buy) | Disposal | 104,467 | 0 |
| Mar 5, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Disposal | 104,467 | 30.3 |
| Mar 5, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Acquisition | 104,467 | |
| Mar 2, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Option (right to buy) | Disposal | 443,707 | 0 |
| Mar 2, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Acquisition | 443,707 | |
| Mar 2, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Disposal | 443,707 | 33.25 |
| Feb 26, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Option (right to buy) | Disposal | 183,332 | 0 |
| Feb 26, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Disposal | 17,924 | 34.44 |
| Feb 26, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Disposal | 165,408 | 33.63 |
| Feb 26, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Acquisition | 183,332 | |
| Feb 25, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Acquisition | 58,253 | |
| Feb 25, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Disposal | 46,517 | 35.11 |
| Feb 25, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Disposal | 10,436 | 35.96 |
| Feb 25, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Option (right to buy) | Disposal | 58,253 | 0 |
| Feb 25, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Disposal | 1,300 | 36.68 |
| Feb 24, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Disposal | 3,161 | 36.46 |
| Feb 24, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Option (right to buy) | Disposal | 64,708 | 0 |
| Feb 24, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Acquisition | 64,708 | |
| Feb 24, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Disposal | 61,547 | 36.13 |
| Feb 20, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Disposal | 14,692 | 35 |
| Feb 20, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Disposal | 30,789 | 35.46 |
| Jan 28, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 32,612 | 10.9 |
| Jan 28, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 32,612 | 0 |
| Jan 28, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 32,612 | 31.8 |
| Jan 27, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 39,816 | 32.62 |
| Jan 27, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 39,816 | 10.9 |
| Jan 27, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 39,816 | 0 |
| Jan 26, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 34,091 | 32.77 |
| Jan 26, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 34,400 | 10.9 |
| Jan 26, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 34,400 | 0 |
| Jan 26, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 309 | 33.45 |
| Jan 23, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 38,172 | 0 |
| Jan 23, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 12,767 | 34.37 |
| Jan 23, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 38,172 | 10.9 |
| Jan 23, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 25,405 | 33.44 |
| Jan 21, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Acquisition | 39,784 | 9.26 |
| Jan 21, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Disposal | 15,422 | 33.25 |
| Jan 21, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Option (Right to Buy) | Disposal | 39,784 | 0 |
| Jan 21, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Disposal | 24,362 | 33.8 |
| Jan 20, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Disposal | 19,604 | 32.38 |
| Jan 20, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Option (Right to Buy) | Disposal | 60,216 | 0 |
| Jan 20, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Acquisition | 60,216 | 9.26 |
| Jan 20, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Disposal | 900 | 30.64 |
| Jan 20, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Disposal | 39,712 | 31.78 |
| Jan 7, 2026 | MCKENNA, MARK C. | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | MCKENNA, MARK C. | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | VAN, DER KAMP HILDE JOHANNA | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | VAN, DER KAMP HILDE JOHANNA | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Acquisition | 81,000 | |
| Jan 7, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Acquisition | 81,000 | |
| Jan 7, 2026 | MCKENNA, MARK C. | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | MCKENNA, MARK C. | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | SMITHER, JOHN W | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | SMITHER, JOHN W | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | LANGE, LOUIS G | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | LEWIS, WILLIAM | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | LANGE, LOUIS G | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | LEWIS, WILLIAM | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Acquisition | 53,500 | 0 |
| Jan 7, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Acquisition | 53,500 | 0 |
| Jan 7, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Option (right to buy) | Acquisition | 364,000 | 0 |
| Jan 7, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Option (right to buy) | Acquisition | 364,000 | 0 |
| Jan 7, 2026 | GULFO, ADELE M. | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | GULFO, ADELE M. | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | GULFO, ADELE M. | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | GULFO, ADELE M. | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Acquisition | 25,500 | |
| Jan 7, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Acquisition | 25,500 | |
| Jan 7, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Disposal | 11,582 | |
| Jan 7, 2026 | DAVIDSON, MICHAEL H. | Director, Chief Executive Officer | Ordinary Shares | Disposal | 11,582 | |
| Jan 7, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Option (right to buy) | Acquisition | 115,000 | 0 |
| Jan 7, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Option (right to buy) | Acquisition | 115,000 | 0 |
| Jan 7, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Acquisition | 25,500 | |
| Jan 7, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Acquisition | 25,500 | |
| Jan 7, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 12,000 | |
| Jan 7, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 12,000 | |
| Jan 7, 2026 | VAN, DER KAMP HILDE JOHANNA | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | VAN, DER KAMP HILDE JOHANNA | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Option (right to buy) | Acquisition | 115,000 | 0 |
| Jan 7, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Option (right to buy) | Acquisition | 115,000 | 0 |
| Jan 7, 2026 | LEWIS, WILLIAM | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | LEWIS, WILLIAM | Director | Ordinary Shares | Acquisition | 3,400 | |
| Jan 7, 2026 | LANGE, LOUIS G | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | LANGE, LOUIS G | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | SMITHER, JOHN W | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 7, 2026 | SMITHER, JOHN W | Director | Option (right to buy) | Acquisition | 15,300 | 0 |
| Jan 5, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 2,647 | 33.25 |
| Jan 5, 2026 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 2,647 | 33.25 |
| Jan 5, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Disposal | 6,000 | 33.25 |
| Jan 5, 2026 | KASTELEIN, JOHANNES JACOB PIETER | Director, Chief Scientific Officer | Ordinary Shares | Disposal | 6,000 | 33.25 |
| Jan 5, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Disposal | 5,118 | 33.25 |
| Jan 5, 2026 | SOMAIYA, MAYUR IAN | Chief Financial Officer | Ordinary Shares | Disposal | 5,118 | 33.25 |
| Dec 26, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 38,872 | 10 |
| Dec 26, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 38,872 | 0 |
| Dec 26, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 5,000 | 10.9 |
| Dec 26, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 43,872 | 35.3 |
| Dec 26, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 5,000 | 0 |
| Dec 24, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 26,011 | 35.68 |
| Dec 24, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 26,011 | 0 |
| Dec 24, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 26,011 | 10 |
| Dec 23, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Option (right to buy) | Disposal | 75,117 | 0 |
| Dec 23, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Disposal | 75,117 | 36.21 |
| Dec 23, 2025 | KOOIJ, LOUISE FREDERIKA | Chief Accounting Officer | Ordinary Shares | Acquisition | 75,117 | 10 |