As of the latest Form 4 filed Jun 24, 2026.
What NewAmsterdam Pharma Company N.V. Ordinary Shares insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 24 most recent filings for NAMS.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-24 | 2026-06-22 | Kooij Louise Frederika Chief Accounting Officer | SSale | −300.00 | $30.73 | $9.22K | Yes (planned) | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Kooij Louise Frederika, Chief Accounting Officer | SSale | −39.7K | $30.20 | $1.20M | Yes (planned) | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Kooij Louise Frederika, Chief Accounting Officer | MExercise | +15.0K | $11.90 | $179K | Yes (planned) | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Kooij Louise Frederika, Chief Accounting Officer | MExercise | +25.0K | $10.90 | $273K | Yes (planned) | Form 4 ↗ |
| 2026-05-27 | 2026-05-26 | Kooij Louise Frederika Chief Accounting Officer | SSale | −65.0K | $35.69 | $2.32M | Yes (planned) | Form 4 ↗ |
| 2026-05-27 | 2026-05-26 | Kooij Louise Frederika, Chief Accounting Officer | MExercise | +5.00K | $10.90 | $54.5K | Yes (planned) | Form 4 ↗ |
| 2026-05-27 | 2026-05-26 | Kooij Louise Frederika, Chief Accounting Officer | MExercise | +60.0K | $10.00 | $600K | Yes (planned) | Form 4 ↗ |
| 2026-01-29 | 2026-01-28 | Kooij Louise Frederika Chief Accounting Officer | SSale | −32.6K | $31.80 | $1.04M | Yes (planned) | Form 4 ↗ |
| 2026-01-29 | 2026-01-28 | Kooij Louise Frederika, Chief Accounting Officer | MExercise | +32.6K | $10.90 | $355K | Yes (planned) | Form 4 ↗ |
| 2026-01-29 | 2026-01-27 | Kooij Louise Frederika, Chief Accounting Officer | SSale | −39.8K | $32.62 | $1.30M | Yes (planned) | Form 4 ↗ |
| 2026-01-29 | 2026-01-27 | Kooij Louise Frederika, Chief Accounting Officer | MExercise | +39.8K | $10.90 | $434K | Yes (planned) | Form 4 ↗ |
| 2026-01-27 | 2026-01-26 | Kooij Louise Frederika Chief Accounting Officer | SSale | −309.00 | $33.45 | $10.3K | Yes (planned) | Form 4 ↗ |
| 2026-01-27 | 2026-01-26 | Kooij Louise Frederika, Chief Accounting Officer | SSale | −34.1K | $32.77 | $1.12M | Yes (planned) | Form 4 ↗ |
| 2026-01-27 | 2026-01-26 | Kooij Louise Frederika, Chief Accounting Officer | MExercise | +34.4K | $10.90 | $375K | Yes (planned) | Form 4 ↗ |
| 2026-01-27 | 2026-01-23 | Kooij Louise Frederika, Chief Accounting Officer | SSale | −12.8K | $34.37 | $439K | Yes (planned) | Form 4 ↗ |
| 2026-01-27 | 2026-01-23 | Kooij Louise Frederika, Chief Accounting Officer | SSale | −25.4K | $33.44 | $850K | Yes (planned) | Form 4 ↗ |
| 2026-01-27 | 2026-01-23 | Kooij Louise Frederika, Chief Accounting Officer | MExercise | +38.2K | $10.90 | $416K | Yes (planned) | Form 4 ↗ |
| 2026-01-22 | 2026-01-21 | Somaiya Mayur Ian Chief Financial Officer | SSale | −24.4K | $33.80 | $823K | Yes (planned) | Form 4 ↗ |
| 2026-01-22 | 2026-01-21 | Somaiya Mayur Ian, Chief Financial Officer | SSale | −15.4K | $33.25 | $513K | Yes (planned) | Form 4 ↗ |
| 2026-01-22 | 2026-01-21 | Somaiya Mayur Ian, Chief Financial Officer | MExercise | +39.8K | $9.26 | $368K | Yes (planned) | Form 4 ↗ |
| 2026-01-22 | 2026-01-20 | Somaiya Mayur Ian, Chief Financial Officer | SSale | −19.6K | $32.38 | $635K | Yes (planned) | Form 4 ↗ |
| 2026-01-22 | 2026-01-20 | Somaiya Mayur Ian, Chief Financial Officer | SSale | −39.7K | $31.78 | $1.26M | Yes (planned) | Form 4 ↗ |
| 2026-01-22 | 2026-01-20 | Somaiya Mayur Ian, Chief Financial Officer | SSale | −900.00 | $30.64 | $27.6K | Yes (planned) | Form 4 ↗ |
| 2026-01-22 | 2026-01-20 | Somaiya Mayur Ian, Chief Financial Officer | MExercise | +60.2K | $9.26 | $558K | Yes (planned) | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also NAMS’s full analysis or the market-wide insider trading feed. The tabs above jump to NAMS’s other SEC data.
Source: SEC Form 4 filings for NAMS, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.