Over the past year, NAMS insiders bought $226,500 of stock on the open market (10K shares), and sold at least $63.25 million of stock on the open market (1.97Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Nap B.V. Forgrowth | TenPercentOwner | 0 | 10,656,172 | 10,656,172 | 71.7% | 02 Jan, 2025 |
| 2 | James N Topper | Director | 0 | 3,028,524 | 3,028,524 | 20.4% | 17 Sep, 2025 |
| 3 | Michael H. Davidson | Chief Executive Officer | 792,923 | 0 | 792,923 | 5.3% | 15 Sep, 2026 |
| 4 | Johannes Jacob Pieter Kastelein | Chief Scientific Officer | 0 | 69,302 | 69,302 | 0.5% | 02 Oct, 2026 |
| 5 | Mayur Ian Somaiya | Chief Financial Officer | 58,382 | 0 | 58,382 | 0.4% | 22 Jan, 2026 |
| 6 | Michael F Iii Marino | Officer | 55,000 | 0 | 55,000 | 0.4% | 03 Jun, 2025 |
| 7 | Douglas F Kling | Chief Operating Officer | 44,000 | 0 | 44,000 | 0.3% | 17 Jul, 2025 |
| 8 | William A Jr Jones | Chief Commercial Officer | 43,000 | 0 | 43,000 | 0.3% | 07 Jan, 2025 |
| 9 | Louise Frederika Kooij | Chief Accounting Officer | 24,353 | 0 | 24,353 | 0.2% | 22 Jul, 2026 |
| 10 | Juliette Berangere Audet | Chief Business Officer | 15,104 | 0 | 15,104 | 0.1% | 07 Jan, 2025 |
| 11 | Adele M. Gulfo | Director | 14,260 | 0 | 14,260 | 0.1% | 09 Jan, 2026 |
| 12 | Louis G Lange | Director | 10,360 | 0 | 10,360 | 0.1% | 12 Mar, 2026 |
| 13 | William Lewis | Director | 10,360 | 0 | 10,360 | 0.1% | 09 Jan, 2026 |
| 14 | Mark C. Mckenna | Director | 10,360 | 0 | 10,360 | 0.1% | 09 Jan, 2026 |
| 15 | Der Kamp Hilde Johanna Van | Director | 10,360 | 0 | 10,360 | 0.1% | 09 Jan, 2026 |
| 16 | John W Smither | Director | 8,760 | 0 | 8,760 | 0.1% | 09 Sep, 2026 |
| 17 | Robert William Gunning | Vice President, Controller | 3,200 | 0 | 3,200 | 0.0% | 03 Sep, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 30 Sep, 2026 | Johannes Jacob Pieter Kastelein | Chief Scientific Officer | Acquired M | 50,246 | — | — | 119,548 | Indirect |
| 30 Sep, 2026 | Johannes Jacob Pieter Kastelein | Chief Scientific Officer | Disposed S | 50,246 | $25.03 | $1.26Mn | 69,302 | Indirect |
| 30 Sep, 2026 | Johannes Jacob Pieter Kastelein | Chief Scientific Officer | Disposed M | 50,246 | $0.00 | $0 | 344,983 | Indirect |
| 14 Sep, 2026 | Michael H. Davidson | Chief Executive Officer | Acquired P | 10,000 | $22.65 | $226.50K | 792,923 | Direct |
| 04 Sep, 2026 | John W Smither | Director | Disposed S | 1,600 | $25.32 | $40.51K | 8,760 | Direct |
| 01 Sep, 2026 | Robert William Gunning | Vice President, Controller | Acquired A | 3,200 | $0.00 | $0 | 3,200 | Direct |
| 01 Sep, 2026 | Robert William Gunning | Vice President, Controller | Acquired A | 14,000 | $0.00 | $0 | 14,000 | Direct |
| 24 Aug, 2026 | Johannes Jacob Pieter Kastelein | Chief Scientific Officer | Acquired M | 125,000 | — | — | 194,302 | Indirect |
| 24 Aug, 2026 | Johannes Jacob Pieter Kastelein | Chief Scientific Officer | Disposed S | 125,000 | $26.91 | $3.36Mn | 69,302 | Indirect |
| 24 Aug, 2026 | Johannes Jacob Pieter Kastelein | Chief Scientific Officer | Disposed M | 125,000 | $0.00 | $0 | 395,229 | Indirect |
| 20 Jul, 2026 | Louise Frederika Kooij | Chief Accounting Officer | Acquired M | 25,000 | $11.90 | $297.50K | 49,353 | Direct |
| 20 Jul, 2026 | Louise Frederika Kooij | Chief Accounting Officer | Acquired M | 80,000 | $11.17 | $893.60K | 129,353 | Direct |
| 20 Jul, 2026 | Louise Frederika Kooij | Chief Accounting Officer | Disposed S | 70,200 | $29.96 | $2.10Mn | 59,153 | Direct |
| 20 Jul, 2026 | Louise Frederika Kooij | Chief Accounting Officer | Disposed S | 31,885 | $31.05 | $990.03K | 27,268 | Direct |
| 20 Jul, 2026 | Louise Frederika Kooij | Chief Accounting Officer | Disposed S | 2,915 | $31.71 | $92.43K | 24,353 | Direct |
| 20 Jul, 2026 | Louise Frederika Kooij | Chief Accounting Officer | Disposed M | 25,000 | $0.00 | $0 | 10,000 | Direct |
| 20 Jul, 2026 | Louise Frederika Kooij | Chief Accounting Officer | Disposed M | 80,000 | $0.00 | $0 | 70,494 | Direct |
| 22 Jun, 2026 | Louise Frederika Kooij | Chief Accounting Officer | Acquired M | 25,000 | $10.90 | $272.50K | 49,353 | Direct |
| 22 Jun, 2026 | Louise Frederika Kooij | Chief Accounting Officer | Acquired M | 15,000 | $11.90 | $178.50K | 64,353 | Direct |
| 22 Jun, 2026 | Louise Frederika Kooij | Chief Accounting Officer | Disposed S | 39,700 | $30.20 | $1.20Mn | 24,653 | Direct |