Updated Jul 16, 2026
Kooij Louise Frederika has filed 2 SEC Form 4 filings across 1 company in the last 90 days — selling. Lifetime open-market sales: $18.80M.
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-24 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 300 | $30.73 | $9K |
| 2026-06-24 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 39.7K | $30.20 | $1.20M |
| 2026-06-24 | NAMS | NewAmsterdam Pharma Co N.V. | M — Option exercise | 15.0K | $11.90 | $178K |
| 2026-06-24 | NAMS | NewAmsterdam Pharma Co N.V. | M — Option exercise | 25.0K | $10.90 | $272K |
| 2026-05-27 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 65.0K | $35.69 | $2.32M |
| 2026-05-27 | NAMS | NewAmsterdam Pharma Co N.V. | M — Option exercise | 5.0K | $10.90 | $54K |
| 2026-05-27 | NAMS | NewAmsterdam Pharma Co N.V. | M — Option exercise | 60.0K | $10.00 | $600K |
| 2026-01-29 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 32.6K | $31.80 | $1.04M |
| 2026-01-29 | NAMS | NewAmsterdam Pharma Co N.V. | M — Option exercise | 32.6K | $10.90 | $355K |
| 2026-01-29 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 39.8K | $32.62 | $1.30M |
| 2026-01-29 | NAMS | NewAmsterdam Pharma Co N.V. | M — Option exercise | 39.8K | $10.90 | $434K |
| 2026-01-27 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 309 | $33.45 | $10K |
| 2026-01-27 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 34.1K | $32.77 | $1.12M |
| 2026-01-27 | NAMS | NewAmsterdam Pharma Co N.V. | M — Option exercise | 34.4K | $10.90 | $375K |
| 2026-01-27 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 12.8K | $34.37 | $439K |
| 2026-01-27 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 25.4K | $33.44 | $850K |
| 2026-01-27 | NAMS | NewAmsterdam Pharma Co N.V. | M — Option exercise | 38.2K | $10.90 | $416K |
| 2026-01-07 | NAMS | NewAmsterdam Pharma Co N.V. | A — Grant or award | 12.0K | — | |
| 2026-01-07 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 2.6K | $33.25 | $88K |
| 2025-12-29 | NAMS | NewAmsterdam Pharma Co N.V. | S — Open-market sale | 43.9K | $35.30 | $1.55M |
Kooij Louise Frederika is a corporate insider — currently tracked as Insider of NewAmsterdam Pharma Co N.V. (NAMS). InsiderAlpha tracks every SEC Form 4 filing in real time.
2 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 0 open-market purchases () and 18 open-market sales ($18.80M) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Open the live Kooij Louise Frederika profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.