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 |
|---|---|---|---|---|---|---|---|---|
| Sep 30, 2026 | Oct 2 8:30 PM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Sale | 50,246 | $25.03 | $1.3M | 69,302(I) | View → |
| Sep 14, 2026 | Sep 15 8:30 PM | Michael H. DavidsonDirector, Chief Executive Officer | Purchase | 10,000 | $22.65 | $226.5K | 792,923(D) | View → |
| Sep 4, 2026 | Sep 9 8:30 PM | John W SmitherDirector | Sale | 1,600 | $25.32 | $40.5K | 8,760(D) | View → |
| Aug 25, 2026 | Aug 25 8:47 PM | Kastelein Johannes Jacob Pieter | Proposed Sale | 250,000 | $27.87 | $7.0M | — | View → |
| Aug 24, 2026 | Aug 25 8:30 PM | Johannes Jacob Pieter KasteleinDirector, Chief Scientific Officer | Sale | 125,000 | $26.91 | $3.4M | 69,302(I) | View → |
| Aug 24, 2026 | Aug 24 8:55 PM | Kastelein Johannes Jacob Pieter | Proposed Sale | 125,000 | $27.87 | $3.5M | — | View → |
| Jul 20, 2026 | Jul 22 8:05 PM | Louise Frederika KooijChief Accounting Officer | Sale | 105,000 | $30.34 | $3.2M | 24,353(D) | View → |
| 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 → |
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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 → |