NewAmsterdam Pharma Co N.V.
NAMS
17 insider filings · Latest: Sep 30, 2026
Common Stock Transactions
| Txn Date | Accepted | Insider | Type | Shares | Avg Price | Value | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|---|
| 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 → |
| Jan 27, 2026 | Jan 29 9:40 PM | Louise Frederika KooijChief Accounting Officer | Sale | 39,816 | $32.62 | $1.3M | 24,353(D) | View → |
| Jan 26, 2026 | Jan 27 10:38 PM | Louise Frederika KooijChief Accounting Officer | Sale | 34,400 | $32.78 | $1.1M | 24,353(D) | View → |
| Jan 23, 2026 | Jan 27 10:38 PM | Louise Frederika KooijChief Accounting Officer | Sale | 38,172 | $33.75 | $1.3M | 24,353(D) | View → |
| Jan 21, 2026 | Jan 22 10:24 PM | Mayur Ian SomaiyaChief Financial Officer | Sale | 39,784 | $33.59 | $1.3M | 58,382(D) | View → |
| Jan 20, 2026 | Jan 22 10:24 PM | Mayur Ian SomaiyaChief Financial Officer | Sale | 60,216 | $31.96 | $1.9M | 58,382(D) | View → |
| Jan 20, 2026 | Jan 20 9:17 PM | Mayur Somaiya | Proposed Sale | 200,000 | $31.65 | $6.3M | — | View → |
| Jan 7, 2026 | Jan 7 6:19 PM | Michael Davidson | Proposed Sale | 11,582 | $35.48 | $410.9K | — | View → |
| Jan 6, 2026 | Jan 6 9:29 PM | Douglas F Kling | Proposed Sale | 300,000 | $33.48 | $10.0M | — | View → |
| Jan 5, 2026 | Jan 5 8:18 PM | Louise Kooij | Proposed Sale | 2,647 | $33.25 | $88.0K | — | View → |
| Jan 5, 2026 | Jan 5 8:04 PM | Johannes Kastelein | Proposed Sale | 6,000 | $33.25 | $199.5K | — | View → |
| Jan 5, 2026 | Jan 5 8:03 PM | Mayur Ian Somaiya | Proposed Sale | 5,118 | $33.25 | $170.2K | — | View → |
| Dec 23, 2025 | Dec 23 10:31 PM | Louise Kooij | Proposed Sale | 290,000 | $36.49 | $10.6M | — | View → |
| Dec 2, 2025 | Dec 3 2:25 AM | Bain Capital Life Sciences Fund II, L.P. | Proposed Sale | 267,429 | $38.33 | $10.3M | — | View → |
Stock Options & Derivatives
| Txn Date | Accepted | Insider | Type | Shares | Exercise Price | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|
| Sep 30, 2026 | Oct 2 8:30 PM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Option Exercise | 50,246 | — | 344,983(I) | View → |
| Sep 1, 2026 | Sep 3 8:30 PM | Robert William GunningVice President, Controller | Grant/Award | 14,000 | $24.92 | 14,000(D) | View → |
| Aug 24, 2026 | Aug 25 8:30 PM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Option Exercise | 125,000 | — | 395,229(I) | View → |
| Jul 20, 2026 | Jul 22 8:05 PM | Louise Frederika KooijChief Accounting Officer | Option Exercise | 105,000 | $11.90 | 70,494(D) | View → |
| 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 → |