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NewAmsterdam Pharma Co N.V. (NASDAQ:NAMS)
NL · Delayed Price · Currency is USD
Healthcare · Biotechnology
19.53-0.18 (-0.91%)
Market cap
$2.28B
Insider Score
Health Score
Analyst consensus
Listed since
Feb 9, 2021
Website
Insider Score
/ 100
NAMS Insider Score
NewAmsterdam Pharma Co N.V. has a live Insider Score.
Scored on 1 qualifying trade from 1 insider in the last 90 days.
NAMS Stock Insider Trading Activity
NAMS stock’s insider trading shows 1 purchase for an estimated $226.50K and 9 sales on the open market for an estimated $11.38M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days1 qualifying buy1 insider$226.50K bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Kastelein Johannes Jacob Pieter Director | Option exercise | 50,246 | — | — | 72.5% | 119,548 | Sep 30, 2026 | — | Form 4 |
| Kastelein Johannes Jacob Pieter Director | Sell | 50,246 | $25.03 | $1.26M | 42.0% | 69,302 | Sep 30, 2026 | — | Form 4 |
| Davidson Michael H. CEO | Buy | 10,000 | $22.65 | $226.50K | 1.3% | 792,923 | Sep 14, 2026 | BFirst BuyCEO BuyDilution | Form 4 |
| Smither John W Director | Sell | 1,600 | $25.32 | $40.51K | 15.4% | 8,760 | Sep 4, 2026 | — | Form 4 |
| Gunning Robert William Other | Award | 3,200 | — | — | New | 3,200 | Sep 1, 2026 | — | Form 4 |
| Kastelein Johannes Jacob Pieter Director | Sell | 125,000 | $26.91 | $3.36M | 64.3% | 69,302 | Aug 24, 2026 | — | Form 4 |
| Kastelein Johannes Jacob Pieter Director | Option exercise | 125,000 | — | — | 180% | 194,302 | Aug 24, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Sell | 2,915 | $31.71 | $92.43K | 10.7% | 24,353 | Jul 20, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Option exercise | 25,000 | $11.90 | $297.50K | 103% | 49,353 | Jul 20, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Option exercise | 80,000 | $11.17 | $893.60K | 162% | 129,353 | Jul 20, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Sell | 70,200 | $29.96 | $2.10M | 54.3% | 59,153 | Jul 20, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Sell | 31,885 | $31.05 | $990.03K | 53.9% | 27,268 | Jul 20, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Option exercise | 25,000 | $10.90 | $272.50K | 103% | 49,353 | Jun 22, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Option exercise | 15,000 | $11.90 | $178.50K | 30.4% | 64,353 | Jun 22, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Sell | 300 | $30.73 | $9.22K | 1.2% | 24,353 | Jun 22, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Sell | 39,700 | $30.20 | $1.20M | 61.7% | 24,653 | Jun 22, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Sell | 65,000 | $35.69 | $2.32M | 72.7% | 24,353 | May 26, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Option exercise | 5,000 | $10.90 | $54.50K | 5.9% | 89,353 | May 26, 2026 | — | Form 4 |
| Kooij Louise Frederika Other | Option exercise | 60,000 | $10.00 | $600.00K | 246% | 84,353 | May 26, 2026 | — | Form 4 |
| LANGE LOUIS G Director | Sell | 446 | $31.23 | $13.93K | 4.1% | 10,360 | Mar 11, 2026 | — | Form 4 |
| LANGE LOUIS G Director | Sell | 44,173 | $30.41 | $1.34M | 80.3% | 10,806 | Mar 11, 2026 | — | Form 4 |
| Kastelein Johannes Jacob Pieter Director | Sell | 101,409 | $30.29 | $3.07M | 59.4% | 69,302 | Mar 9, 2026 | — | Form 4 |
| Kastelein Johannes Jacob Pieter Director | Option exercise | 101,409 | — | — | 146% | 170,711 | Mar 9, 2026 | — | Form 4 |
| LANGE LOUIS G Director | Option exercise | 44,619 | $11.50 | $513.12K | 431% | 54,979 | Mar 9, 2026 | — | Form 4 |
| LANGE LOUIS G Director | Sell | 28,186 | $29.41 | $828.95K | 100% | 0 | Mar 6, 2026 | — | Form 4 |
| Kastelein Johannes Jacob Pieter Director | Sell | 94,124 | $30.32 | $2.85M | 57.6% | 69,302 | Mar 6, 2026 | — | Form 4 |
| Kastelein Johannes Jacob Pieter Director | Option exercise | 94,124 | — | — | 136% | 163,426 | Mar 6, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Buy (P) — Open-market or private purchase
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
- Option exercise (M) — Exercise or conversion of an exempt derivative
- Option exercise (X) — Exercise of an in- or at-the-money derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.