Louise Frederika Kooij, Chief Accounting Officer at NewAmsterdam Pharma Co N.V. ($NAMS), sold about $14.6 million in company shares across 14 open market transactions over the past year. Her most recent sale occurred on January 28, 2026. These sales rank her 860th among nearly 12,000 individual insiders by total value sold, above the average of $8.6 million per insider and 6.4 transactions. She made no open market purchases in this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 27, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 39816 | $0.00 | 105,746.0000 | 119,000,266 | 27.35% | 0.03% |
| Jan. 28, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 32612 | $31.80 | 24,353.0000 | 119,000,266 | 57.25% | 0.03% |
| Jan. 28, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 32612 | $10.90 | 56,965.0000 | 119,000,266 | 133.91% | 0.03% |
| Jan. 27, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 39816 | $32.62 | 24,353.0000 | 119,000,266 | 62.05% | 0.03% |
| Jan. 27, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 39816 | $10.90 | 64,169.0000 | 119,000,266 | 163.50% | 0.03% |
| Jan. 28, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 32612 | $0.00 | 73,134.0000 | 119,000,266 | 30.84% | 0.03% |
| Jan. 23, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 12767 | $34.37 | 24,353.0000 | 119,000,266 | 34.39% | 0.01% |
| Jan. 23, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 38172 | $10.90 | 62,525.0000 | 119,000,266 | 156.74% | 0.03% |
| Jan. 23, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 25405 | $33.44 | 37,120.0000 | 119,000,266 | 40.63% | 0.02% |
| Jan. 26, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 34400 | $0.00 | 145,562.0000 | 119,000,266 | 19.12% | 0.03% |
| Jan. 23, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 38172 | $0.00 | 179,962.0000 | 119,000,266 | 17.50% | 0.03% |
| Jan. 26, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 309 | $33.45 | 24,353.0000 | 119,000,266 | 1.25% | 0.00% |
| Jan. 26, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 34091 | $32.77 | 24,662.0000 | 119,000,266 | 58.02% | 0.03% |
| Jan. 26, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 34400 | $10.90 | 58,753.0000 | 119,000,266 | 141.26% | 0.03% |
| Jan. 7, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | A | Ordinary Shares | 12000 | $0.00 | 24,353.0000 | 119,000,266 | 97.14% | 0.01% |
| Jan. 7, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | A | Option (right to buy) | 53500 | $0.00 | 53,500.0000 | 119,000,266 | 9999.99% | 0.04% |
| Jan. 5, 2026 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 2647 | $33.25 | 12,353.0000 | 119,000,266 | 17.65% | 0.00% |
| Dec. 26, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 5000 | $0.00 | 218,134.0000 | 119,000,266 | 2.24% | 0.00% |
| Dec. 23, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 75117 | $10.00 | 90,117.0000 | 119,000,266 | 500.78% | 0.06% |
| Dec. 23, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 75117 | $36.21 | 15,000.0000 | 119,000,266 | 83.35% | 0.06% |
| Dec. 24, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 26011 | $10.00 | 41,011.0000 | 119,000,266 | 173.41% | 0.02% |
| Dec. 24, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 26011 | $35.68 | 15,000.0000 | 119,000,266 | 63.42% | 0.02% |
| Dec. 26, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 38872 | $10.00 | 53,872.0000 | 119,000,266 | 259.15% | 0.03% |
| Dec. 26, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 5000 | $10.90 | 58,872.0000 | 119,000,266 | 9.28% | 0.00% |
| Dec. 26, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 43872 | $35.30 | 15,000.0000 | 119,000,266 | 74.52% | 0.04% |
| Dec. 23, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 75117 | $0.00 | 204,898.0000 | 119,000,266 | 26.83% | 0.06% |
| Dec. 24, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 26011 | $0.00 | 178,887.0000 | 119,000,266 | 12.69% | 0.02% |
| Dec. 26, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 38872 | $0.00 | 140,015.0000 | 119,000,266 | 21.73% | 0.03% |
| Sept. 9, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 150000 | $10.00 | 165,000.0000 | 94,358,067 | 1000.00% | 0.16% |
| Sept. 9, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 150000 | $0.00 | 280,015.0000 | 94,358,067 | 34.88% | 0.16% |
| Sept. 9, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 96896 | $26.11 | 15,000.0000 | 94,358,067 | 86.59% | 0.10% |
| Sept. 9, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 53104 | $25.31 | 111,896.0000 | 94,358,067 | 32.18% | 0.06% |
| Sept. 3, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 18073 | $25.09 | 15,000.0000 | 94,358,067 | 54.65% | 0.02% |
| Sept. 2, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 18073 | $0.00 | 0.0000 | 94,358,067 | 100.00% | 0.02% |
| Sept. 2, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 18073 | $0.00 | 33,073.0000 | 94,358,067 | 120.49% | 0.02% |
| Aug. 25, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 8269 | $24.86 | 15,000.0000 | 94,358,067 | 35.54% | 0.01% |
| March 26, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Restricted Stock Unit | 8269 | $0.00 | 0.0000 | 94,358,067 | 100.00% | 0.01% |
| March 26, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | A | Restricted Stock Unit | 8269 | $0.00 | 8,269.0000 | 94,358,067 | 9999.99% | 0.01% |
| March 26, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 8269 | $0.00 | 23,269.0000 | 94,358,067 | 55.13% | 0.01% |
| March 4, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 150000 | $0.00 | 165,000.0000 | 94,358,067 | 1000.00% | 0.16% |
| March 4, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 150000 | $20.37 | 15,000.0000 | 94,358,067 | 90.91% | 0.16% |
| March 4, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 150000 | $0.00 | 18,073.0000 | 94,358,067 | 89.25% | 0.16% |
| Jan. 7, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | A | Ordinary Shares | 15000 | $0.00 | 15,000.0000 | 94,358,067 | 9999.99% | 0.02% |
| Jan. 2, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | A | Option (right to buy) | 80000 | $0.00 | 80,000.0000 | 94,358,067 | 9999.99% | 0.08% |
| Sept. 27, 2024 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Ordinary Shares | 45000 | $0.00 | 45,000.0000 | 82,161,956 | 9999.99% | 0.05% |
| Oct. 1, 2024 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | S | Ordinary Shares | 45000 | $15.72 | 0.0000 | 94,754,140 | 100.00% | 0.05% |
| Sept. 27, 2024 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | M | Option (right to buy) | 45000 | $0.00 | 168,073.0000 | 82,161,956 | 21.12% | 0.05% |
| Jan. 1, 2024 | NewAmsterdam Pharma Co N.V. | $NAMS | Kooij Louise Frederika | Chief Accounting Officer | A | Option (right to buy) | 150494 | $0.00 | 150,494.0000 | 82,161,956 | 9999.99% | 0.18% |