Kooij Louise Frederika Insider Trading Activity
Kooij Louise Frederika has been net-selling over the last 12 months with 0 purchases and 19 sales across 1 company.
NAMS is the most-traded position with 19 trades. The largest single transaction was a sale of NAMS for $2.7M on Dec 23, 2025.
Performance Scorecard
Forward stock performance after each transaction by Kooij Louise Frederika. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.
| PERIOD | AVG BUY RETURN | AVG SELL AVOIDED | SUCCESS RATE | TRADES |
|---|---|---|---|---|
| 30 days | — | -7.3% | 25% | 16 |
| 90 days | — | -7.2% | 64% | 14 |
| 120 days | — | -12.0% | 29% | 14 |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersNAMS · NewAmsterdam Pharma Co N.V.
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| DATE | TICKER | TYPE | SHARES | PRICE | VALUE | Δ OWNED | ROLE | FILING |
|---|---|---|---|---|---|---|---|---|
Jul 20, 2026 | NAMS | Sell | 2,915 | $31.71 | $92K | −10.7% | Chief Accounting Officer | |
Jul 20, 2026 | NAMS | Sell | 31,885 | $31.05 | $990K | −53.9% | Chief Accounting Officer | |
Jul 20, 2026 | NAMS | Sell | 70,200 | $29.96 | $2.1M | −54.3% | Chief Accounting Officer | |
Jun 22, 2026 | NAMS | Sell | 39,700 | $30.20 | $1.2M | −61.7% | Chief Accounting Officer | |
Jun 22, 2026 | NAMS | Sell | 300 | $30.73 | $9K | −1.2% | Chief Accounting Officer | |
Jan 28, 2026 | NAMS | Sell | 32,612 | $31.80 | $1.0M | −57.2% | Chief Accounting Officer | |
Jan 27, 2026 | NAMS | Sell | 39,816 | $32.62 | $1.3M | −62.0% | Chief Accounting Officer | |
Jan 26, 2026 | NAMS | Sell | 34,091 | $32.77 | $1.1M | −58.0% | Chief Accounting Officer | |
Jan 26, 2026 | NAMS | Sell | 309 | $33.45 | $10K | −1.3% | Chief Accounting Officer | |
Jan 23, 2026 | NAMS | Sell | 25,405 | $33.44 | $850K | −40.6% | Chief Accounting Officer | |
Jan 23, 2026 | NAMS | Sell | 12,767 | $34.37 | $439K | −34.4% | Chief Accounting Officer | |
Jan 5, 2026 | NAMS | Sell | 2,647 | $33.25 | $88K | −17.6% | Chief Accounting Officer | |
Dec 26, 2025 | NAMS | Sell | 43,872 | $35.30 | $1.5M | −74.5% | Chief Accounting Officer | |
Dec 24, 2025 Filed 3d late | NAMS | Sell | 26,011 | $35.68 | $928K | −63.4% | Chief Accounting Officer | |
Dec 23, 2025 Filed 4d late | NAMS | Sell | 75,117 | $36.21 | $2.7M | −83.4% | Chief Accounting Officer | |
Sep 9, 2025 | NAMS | Sell | 96,896 | $26.11 | $2.5M | −86.6% | Chief Accounting Officer | |
Sep 9, 2025 | NAMS | Sell | 53,104 | $25.31 | $1.3M | −32.2% | Chief Accounting Officer | |
Sep 3, 2025 | NAMS | Sell | 18,073 | $25.09 | $453K | −54.6% | Chief Accounting Officer | |
Aug 25, 2025 | NAMS | Sell | 8,269 | $24.86 | $206K | −35.5% | Chief Accounting Officer |
Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| NAMS | NewAmsterdam Pharma Co N.V. | 19 | $19.0M |
Other insiders at NewAmsterdam Pharma Co N.V.
6 other tracked filers at NAMS.