Profile
| Role | Insider |
|---|---|
| Notability | 20/100 |
Board memberships
- NewAmsterdam Pharma Co N.V.
Updated Jul 16, 2026
Topper James N has filed 1 SEC Form 4 filing across 1 company in the last 90 days — buying. Lifetime open-market purchases: $58K. Historical track record: 5/5 stars across 3 tracked purchases.
| Role | Insider |
|---|---|
| Notability | 20/100 |
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.
| InsiderAlpha rating | ★★★★★ (5/5) |
|---|---|
| Total purchases tracked | 3 |
| Purchases with forward-return data | 3 |
| 30-day win rate | 10000% |
| 90-day win rate | 10000% |
| Avg 5-day return | +416.93% |
| Avg 30-day return | +3635.11% |
| Avg 90-day return | +4965.19% |
| Best 30-day return | +6770.32% |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-21 | PHAT | Phathom Pharmaceuticals, Inc. | A — Grant or award | 24.1K | $0.00 | |
| 2025-09-15 | NAMS | NewAmsterdam Pharma Co N.V. | P — Open-market purchase | 660 | $23.70 | $16K |
| 2025-09-08 | NAMS | NewAmsterdam Pharma Co N.V. | P — Open-market purchase | 1.3K | $24.99 | $31K |
| 2025-08-11 | NAMS | NewAmsterdam Pharma Co N.V. | P — Open-market purchase | 471 | $23.98 | $11K |
Topper James N is a corporate insider — currently tracked as Insider of Phathom Pharmaceuticals, Inc. (PHAT). InsiderAlpha tracks every SEC Form 4 filing in real time.
1 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 3 open-market purchases ($58K) and 0 open-market sales () across all tracked filings.
Across 3 tracked purchases, Topper James N averaged +3635.1% avg 30-day return with a 10000% 30-day win rate. InsiderAlpha rates the track record at 5/5 stars.
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 Topper James N profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.