Topper James N made open market purchases of NewAmsterdam Pharma ($NAMS) shares seven times in the last year, totaling about $321 thousand, with his most recent buy on September 15, 2025. These rank 1,098th among nearly 5,000 insiders averaging 1.5 million per buyer and 3.3 transactions. He also bought Phathom Pharmaceuticals ($PHAT) shares six times for $192 thousand, latest on May 21, 2025, ranking 1,631st. No open market sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sept. 15, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Topper James N | Not found | P | Ordinary Shares | 660 | $23.70 | 6,829,524.0000 | 94,358,067 | 0.01% | 0.00% |
| Sept. 8, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Topper James N | Not found | P | Ordinary Shares | 1260 | $24.99 | 6,828,864.0000 | 94,358,067 | 0.02% | 0.00% |
| Aug. 11, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Topper James N | Not found | P | Ordinary Shares | 471 | $23.98 | 6,827,604.0000 | 94,358,067 | 0.01% | 0.00% |
| June 24, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Topper James N | Not found | P | Ordinary Shares | 2520 | $18.43 | 6,825,873.0000 | 94,358,067 | 0.04% | 0.00% |
| June 25, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Topper James N | Not found | P | Ordinary Shares | 1260 | $18.26 | 6,827,133.0000 | 94,358,067 | 0.02% | 0.00% |
| June 16, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Topper James N | Not found | P | Ordinary Shares | 8584 | $19.50 | 6,823,153.0000 | 94,358,067 | 0.13% | 0.01% |
| June 3, 2025 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Not found | A | Common Stock | 10500 | $0.00 | 5,933,327.0000 | 63,176,210 | 0.18% | 0.02% |
| June 3, 2025 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Not found | A | Stock Option (Right to Buy) | 17500 | $0.00 | 17,500.0000 | 63,176,210 | 9999.99% | 0.03% |
| May 21, 2025 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Not found | P | Common Stock | 3780 | $3.86 | 5,922,827.0000 | 63,176,210 | 0.06% | 0.01% |
| May 14, 2025 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Not found | P | Common Stock | 6300 | $3.32 | 5,919,047.0000 | 63,176,210 | 0.11% | 0.01% |
| May 13, 2025 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Not found | P | Common Stock | 1120 | $3.16 | 5,912,747.0000 | 63,176,210 | 0.02% | 0.00% |
| May 9, 2025 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Not found | P | Common Stock | 2226 | $3.62 | 5,899,026.0000 | 63,176,210 | 0.04% | 0.00% |
| May 9, 2025 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Not found | P | Common Stock | 33376 | $3.19 | 5,896,800.0000 | 63,176,210 | 0.57% | 0.05% |
| May 12, 2025 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Not found | P | Common Stock | 12601 | $3.04 | 5,911,627.0000 | 63,176,210 | 0.21% | 0.02% |
| March 26, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Topper James N | Not found | P | Ordinary Shares | 1135 | $22.49 | 6,814,569.0000 | 94,358,067 | 0.02% | 0.00% |
| March 4, 2025 | NewAmsterdam Pharma Co N.V. | $NAMS | Topper James N | Not found | P | Ordinary Shares | 4005 | $21.02 | 6,813,434.0000 | 94,358,067 | 0.06% | 0.00% |
| May 23, 2024 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Not found | A | Stock Option (Right to Buy) | 17500 | $0.00 | 17,500.0000 | 51,289,092 | 50.00% | 0.03% |
| May 23, 2024 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Not found | A | Common Stock | 10500 | $0.00 | 5,863,424.0000 | 51,289,092 | 0.18% | 0.02% |
| March 26, 2024 | NewAmsterdam Pharma Co N.V. | $NAMS | Topper James N | Not found | P | Ordinary Shares | 8429 | $21.50 | 6,809,429.0000 | 82,161,956 | 0.12% | 0.01% |
| May 25, 2023 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Director | A | Stock Option (Right to Buy) | 15000 | $0.00 | 15,000.0000 | 0 | 9999.99% | 0.00% |
| May 25, 2023 | Phathom Pharmaceuticals, Inc. | $PHAT | Topper James N | Director | A | Common Stock | 9000 | $0.00 | 5,852,924.0000 | 0 | 0.15% | 0.00% |
| Jan. 6, 2023 | ANAPTYSBIO, INC | $ANAB | Topper James N | Director | A | Restricted Stock Unit | 3900 | $0.00 | 3,900.0000 | 0 | 9999.99% | 0.00% |
| Jan. 6, 2023 | ANAPTYSBIO, INC | $ANAB | Topper James N | Director | A | Stock Option (right to buy) | 10600 | $0.00 | 10,600.0000 | 0 | 9999.99% | 0.00% |