NewAmsterdam Pharma Co N.V.
NAMS
11 insider filings · Latest: Jun 22, 2026
Common Stock Transactions
| Txn Date | Accepted | Insider | Type | Shares | Avg Price | Value | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|---|
| Jun 22, 2026 | Jun 24 8:10 PM | Louise Frederika KooijChief Accounting Officer | Sale | 40,000 | $30.20 | $1.2M | 24,353(D) | View → |
| May 26, 2026 | May 27 8:30 PM | Louise Frederika KooijChief Accounting Officer | Sale | 65,000 | $35.69 | $2.3M | 24,353(D) | View → |
| May 26, 2026 | May 26 9:04 PM | Louise Kooij | Proposed Sale | 210,000 | $35.44 | $7.4M | — | View → |
| Mar 11, 2026 | Mar 12 8:25 PM | Louis G LangeDirector | Sale | 44,619 | $30.42 | $1.4M | 10,360(D) | View → |
| Mar 11, 2026 | Mar 11 8:08 PM | Louis G. Lange | Proposed Sale | 44,619 | $31.27 | $1.4M | — | View → |
| Mar 6, 2026 | Mar 11 12:58 AM | Louis G LangeDirector | Sale | 28,186 | $29.41 | $829.0K | 0(I) | View → |
| Mar 9, 2026 | Mar 10 12:18 AM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Sale | 101,409 | $30.29 | $3.1M | 69,302(I) | View → |
| Mar 6, 2026 | Mar 10 12:18 AM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Sale | 94,124 | $30.32 | $2.9M | 69,302(I) | View → |
| Mar 5, 2026 | Mar 10 12:18 AM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Sale | 104,467 | $30.30 | $3.2M | 69,302(I) | View → |
| Mar 6, 2026 | Mar 6 10:52 PM | Louis G. Lange | Proposed Sale | 28,186 | $31.18 | $878.8K | — | View → |
| Mar 2, 2026 | Mar 5 9:14 PM | Kastelein Johannes Jacob Pieter | Proposed Sale | 300,000 | $31.18 | $9.4M | — | View → |
| Mar 2, 2026 | Mar 2 11:08 PM | Michael H. DavidsonDirector, Chief Executive Officer | Sale | 443,707 | $33.25 | $14.8M | 174,144(D) | View → |
| Mar 2, 2026 | Mar 2 9:10 PM | Michael H. Davidson | Proposed Sale | 443,707 | $35.46 | $15.7M | — | View → |
| Feb 26, 2026 | Feb 27 2:40 AM | Michael H. DavidsonDirector, Chief Executive Officer | Sale | 183,332 | $33.71 | $6.2M | 174,144(D) | View → |
| Feb 25, 2026 | Feb 27 2:40 AM | Michael H. DavidsonDirector, Chief Executive Officer | Sale | 58,253 | $35.30 | $2.1M | 459,859(D) | View → |
| Feb 24, 2026 | Feb 27 2:40 AM | Michael H. DavidsonDirector, Chief Executive Officer | Sale | 64,708 | $36.15 | $2.3M | 459,859(D) | View → |
| Feb 20, 2026 | Feb 24 9:40 PM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Sale | 45,481 | $35.31 | $1.6M | 53,500(D) | View → |
| Feb 24, 2026 | Feb 24 9:22 PM | Michael H. Davidson | Proposed Sale | 750,000 | $36.17 | $27.1M | — | View → |
| Feb 20, 2026 | Feb 20 12:51 PM | Kastelein Johannes Jacob Pieter | Proposed Sale | 45,481 | $34.63 | $1.6M | — | View → |
| Jan 28, 2026 | Jan 29 9:40 PM | Louise Frederika KooijChief Accounting Officer | Sale | 32,612 | $31.80 | $1.0M | 24,353(D) | View → |
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Stock Options & Derivatives
| Txn Date | Accepted | Insider | Type | Shares | Exercise Price | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|
| Jun 22, 2026 | Jun 24 8:10 PM | Louise Frederika KooijChief Accounting Officer | Option Exercise | 40,000 | $11.90 | 35,000(D) | View → |
| May 26, 2026 | May 27 8:30 PM | Louise Frederika KooijChief Accounting Officer | Option Exercise | 65,000 | $10.90 | 68,134(D) | View → |
| Mar 9, 2026 | Mar 11 12:58 AM | Louis G LangeDirector | X | 44,619 | $11.50 | 0(D) | View → |
| Mar 9, 2026 | Mar 10 12:18 AM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Option Exercise | 101,409 | — | 520,229(I) | View → |
| Mar 6, 2026 | Mar 10 12:18 AM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Option Exercise | 94,124 | — | 621,638(I) | View → |
| Mar 5, 2026 | Mar 10 12:18 AM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Option Exercise | 104,467 | — | 715,762(I) | View → |
| Mar 2, 2026 | Mar 2 11:08 PM | Michael H. DavidsonDirector, Chief Executive Officer | Option Exercise | 443,707 | — | 239,267(D) | View → |
| Feb 26, 2026 | Feb 27 2:40 AM | Michael H. DavidsonDirector, Chief Executive Officer | Option Exercise | 183,332 | — | 682,974(D) | View → |
| Feb 25, 2026 | Feb 27 2:40 AM | Michael H. DavidsonDirector, Chief Executive Officer | Option Exercise | 58,253 | — | 866,306(D) | View → |
| Feb 24, 2026 | Feb 27 2:40 AM | Michael H. DavidsonDirector, Chief Executive Officer | Option Exercise | 64,708 | — | 924,559(D) | View → |
| Jan 28, 2026 | Jan 29 9:40 PM | Louise Frederika KooijChief Accounting Officer | Option Exercise | 32,612 | $10.90 | 73,134(D) | View → |
| Jan 27, 2026 | Jan 29 9:40 PM | Louise Frederika KooijChief Accounting Officer | Option Exercise | 39,816 | $10.90 | 105,746(D) | View → |
| Jan 26, 2026 | Jan 27 10:38 PM | Louise Frederika KooijChief Accounting Officer | Option Exercise | 34,400 | $10.90 | 145,562(D) | View → |
| Jan 23, 2026 | Jan 27 10:38 PM | Louise Frederika KooijChief Accounting Officer | Option Exercise | 38,172 | $10.90 | 179,962(D) | View → |
| Jan 21, 2026 | Jan 22 10:24 PM | Mayur Ian SomaiyaChief Financial Officer | Option Exercise | 39,784 | $9.26 | 662,814(D) | View → |
| Jan 20, 2026 | Jan 22 10:24 PM | Mayur Ian SomaiyaChief Financial Officer | Option Exercise | 60,216 | $9.26 | 702,598(D) | View → |