The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jul 20, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 25K | $11.90 | $298K |
| Jul 20, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 80K | $11.17 | $894K |
| Jul 20, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 70K | $29.96 | $2.1M |
| Jul 20, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 32K | $31.05 | $990K |
| Jul 20, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 3K | $31.71 | $92K |
| Jul 20, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 25K | — | $0 |
| Jul 20, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 80K | — | $0 |
| Jun 22, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 25K | $10.90 | $273K |
| Jun 22, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 15K | $11.90 | $179K |
| Jun 22, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 40K | $30.20 | $1.2M |
| Jun 22, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 300 | $30.73 | $9K |
| Jun 22, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 25K | — | $0 |
| Jun 22, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 15K | — | $0 |
| May 26, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 60K | $10.00 | $600K |
| May 26, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 5K | $10.90 | $55K |
| May 26, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 65K | $35.69 | $2.3M |
| May 26, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 60K | — | $0 |
| May 26, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 5K | — | $0 |
| Mar 11, 2026 | Lange Louis G | Director | Sell(S) | 446 | $31.23 | $14K |
| Mar 11, 2026 | Lange Louis G | Director | Sell(S) | 44K | $30.41 | $1.3M |
| Mar 9, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Sell(S) | 101K | $30.29 | $3.1M |
| Mar 9, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Option exercise(M) | 101K | — | — |
| Mar 9, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Option exercise(M) | 101K | — | $0 |
| Mar 9, 2026 | Lange Louis G | Director | Option exercise(X) | 45K | $11.50 | $513K |
| Mar 9, 2026 | Lange Louis G | Director | Option exercise(X) | 45K | — | $0 |
| Mar 6, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Option exercise(M) | 94K | — | — |
| Mar 6, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Sell(S) | 94K | $30.32 | $2.9M |
| Mar 6, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Option exercise(M) | 94K | — | $0 |
| Mar 6, 2026 | Lange Louis G | Director | Sell(S) | 28K | $29.41 | $829K |
| Mar 5, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Option exercise(M) | 104K | — | — |
| Mar 5, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Sell(S) | 104K | $30.30 | $3.2M |
| Mar 5, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Option exercise(M) | 104K | — | $0 |
| Mar 2, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Sell(S) | 444K | $33.25 | $14.8M |
| Mar 2, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Option exercise(M) | 444K | — | — |
| Mar 2, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Option exercise(M) | 444K | — | $0 |
| Feb 26, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Option exercise(M) | 183K | — | — |
| Feb 26, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Sell(S) | 165K | $33.63 | $5.6M |
| Feb 26, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Sell(S) | 18K | $34.44 | $617K |
| Feb 26, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Option exercise(M) | 183K | — | $0 |
| Feb 25, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Option exercise(M) | 58K | — | — |
| Feb 25, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Sell(S) | 47K | $35.11 | $1.6M |
| Feb 25, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Sell(S) | 10K | $35.96 | $375K |
| Feb 25, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Sell(S) | 1K | $36.68 | $48K |
| Feb 25, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Option exercise(M) | 58K | — | $0 |
| Feb 24, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Option exercise(M) | 65K | — | — |
| Feb 24, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Sell(S) | 62K | $36.13 | $2.2M |
| Feb 24, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Sell(S) | 3K | $36.46 | $115K |
| Feb 24, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Option exercise(M) | 65K | — | $0 |
| Feb 20, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Sell(S) | 31K | $35.46 | $1.1M |
| Feb 20, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Sell(S) | 15K | $35.00 | $514K |
| Jan 28, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 33K | $10.90 | $355K |
| Jan 28, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 33K | $31.80 | $1.0M |
| Jan 28, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 33K | — | $0 |
| Jan 27, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 40K | $32.62 | $1.3M |
| Jan 27, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 40K | $10.90 | $434K |
| Jan 27, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 40K | — | $0 |
| Jan 26, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 34K | $10.90 | $375K |
| Jan 26, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 34K | $32.77 | $1.1M |
| Jan 26, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 309 | $33.45 | $10K |
| Jan 26, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 34K | — | $0 |
| Jan 23, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 38K | $10.90 | $416K |
| Jan 23, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 25K | $33.44 | $850K |
| Jan 23, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 13K | $34.37 | $439K |
| Jan 23, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 38K | — | $0 |
| Jan 21, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Sell(S) | 24K | $33.80 | $823K |
| Jan 21, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Sell(S) | 15K | $33.25 | $513K |
| Jan 21, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Option exercise(M) | 40K | $9.26 | $368K |
| Jan 21, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Option exercise(M) | 40K | — | $0 |
| Jan 20, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Option exercise(M) | 60K | $9.26 | $558K |
| Jan 20, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Sell(S) | 20K | $32.38 | $635K |
| Jan 20, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Sell(S) | 40K | $31.78 | $1.3M |
| Jan 20, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Sell(S) | 900 | $30.64 | $28K |
| Jan 20, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Option exercise(M) | 60K | — | $0 |
| Jan 7, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Grant(A) | 26K | — | — |
| Jan 7, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Grant(A) | 115K | — | $0 |
| Jan 7, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Grant(A) | 12K | — | — |
| Jan 7, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Grant(A) | 54K | — | $0 |
| Jan 7, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Grant(A) | 26K | — | — |
| Jan 7, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Grant(A) | 115K | — | $0 |
| Jan 7, 2026 | Lange Louis G | Director | Grant(A) | 3K | — | — |
| Jan 7, 2026 | Lange Louis G | Director | Grant(A) | 15K | — | $0 |
| Jan 7, 2026 | McKenna Mark C. | Director | Grant(A) | 3K | — | — |
| Jan 7, 2026 | McKenna Mark C. | Director | Grant(A) | 15K | — | $0 |
| Jan 7, 2026 | Smither John W | Director | Grant(A) | 3K | — | — |
| Jan 7, 2026 | Smither John W | Director | Grant(A) | 15K | — | $0 |
| Jan 7, 2026 | Lewis William | Director | Grant(A) | 3K | — | — |
| Jan 7, 2026 | Lewis William | Director | Grant(A) | 15K | — | $0 |
| Jan 7, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Grant(A) | 81K | — | — |
| Jan 7, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Sell(S) | 12K | — | — |
| Jan 7, 2026 | Davidson Michael H. | Chief Executive Officer, Director | Grant(A) | 364K | — | $0 |
| Jan 7, 2026 | Gulfo Adele M. | Director | Grant(A) | 3K | — | — |
| Jan 7, 2026 | Gulfo Adele M. | Director | Grant(A) | 15K | — | $0 |
| Jan 7, 2026 | van der Kamp Hilde Johanna | Director | Grant(A) | 3K | — | — |
| Jan 7, 2026 | van der Kamp Hilde Johanna | Director | Grant(A) | 15K | — | $0 |
| Jan 5, 2026 | Somaiya Mayur Ian | Chief Financial Officer | Sell(S) | 5K | $33.25 | $170K |
| Jan 5, 2026 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 3K | $33.25 | $88K |
| Jan 5, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer, Director | Sell(S) | 6K | $33.25 | $200K |
| Dec 26, 2025 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 39K | $10.00 | $389K |
| Dec 26, 2025 | Kooij Louise Frederika | Chief Accounting Officer | Option exercise(M) | 5K | $10.90 | $55K |
| Dec 26, 2025 | Kooij Louise Frederika | Chief Accounting Officer | Sell(S) | 44K | $35.30 | $1.5M |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Coverage: Form 4 filings indexed 2019-12-30 → 2026-08-06. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for NAMS