Topper James N (CIK 1341382) reported 19 SEC Form 4 insider transactions across 4 companies over the past 18 months (most recent 2026-05-21). Recent activity: Buy PHAT (24,122 shares), Buy MBX (666,666 shares), Buy NAMS (660 shares), Sell HLVX (8.5M shares), Sell HLVX (17,199 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-21 | Phathom Pharmaceuticals, Inc. (PHAT) | Director | Buy | 24,122 | $0 |
| 2025-09-30 | MBX Biosciences, Inc. (MBX) | Insider | Buy | 666,666 | $12.0M |
| 2025-09-17 | NewAmsterdam Pharma Co N.V. (NAMS) | Director | Buy | 660 | $15,642 |
| 2025-09-17 | HilleVax, Inc. (HLVX) | Insider | Sell | 8.5M | $16.6M |
| 2025-09-17 | HilleVax, Inc. (HLVX) | Insider | Sell | 17,199 | $33,538 |
| 2025-09-10 | NewAmsterdam Pharma Co N.V. (NAMS) | Director | Buy | 1,260 | $31,487 |
| 2025-08-13 | NewAmsterdam Pharma Co N.V. (NAMS) | Director | Buy | 471 | $11,295 |
| 2025-06-26 | NewAmsterdam Pharma Co N.V. (NAMS) | Director | Buy | 2,520 | $46,444 |
| 2025-06-26 | NewAmsterdam Pharma Co N.V. (NAMS) | Director | Buy | 1,260 | $23,008 |
| 2025-06-18 | NewAmsterdam Pharma Co N.V. (NAMS) | Director | Buy | 8,584 | $167,388 |
| 2025-06-05 | Phathom Pharmaceuticals, Inc. (PHAT) | Director | Buy | 10,500 | $0 |
| 2025-05-23 | Phathom Pharmaceuticals, Inc. (PHAT) | Director | Buy | 3,780 | $14,591 |
| 2025-05-15 | Phathom Pharmaceuticals, Inc. (PHAT) | Director | Buy | 1,120 | $3,539 |
| 2025-05-15 | Phathom Pharmaceuticals, Inc. (PHAT) | Director | Buy | 6,300 | $20,916 |
| 2025-05-13 | Phathom Pharmaceuticals, Inc. (PHAT) | Director | Buy | 33,376 | $106,469 |
| 2025-05-13 | Phathom Pharmaceuticals, Inc. (PHAT) | Director | Buy | 2,226 | $8,058 |
| 2025-05-13 | Phathom Pharmaceuticals, Inc. (PHAT) | Director | Buy | 12,601 | $38,307 |
| 2025-03-28 | NewAmsterdam Pharma Co N.V. (NAMS) | Director | Buy | 1,135 | $25,526 |
| 2025-03-06 | NewAmsterdam Pharma Co N.V. (NAMS) | Director | Buy | 4,005 | $84,185 |
Source: SEC Form 4 filings · as of 2026-05-21