NAMS insiders were on both sides of the trade this year. Buys came to roughly $226,000 (one buyer), sales to $63.3 million (six sellers).
The largest purchase came from Davidson Michael H. (CEO), about $226,000. That includes C-suite money, which tends to get the most attention.
7 quarters in a row of net selling by insiders. Insiders bought in 4 of the last 7 full quarters. Big money check: 195 institutions held NAMS as of Q2 2026, and more funds bought than sold.
| Filed | Insider | Role | Type | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | Kastelein Johannes Jacob Pieter | Executive Officer | Sell | 50,246 | $25.03 | $1.3M | SEC |
| Sep 15, 2026 | Davidson Michael H. | CEO | Buy | 10,000 | $22.65 | $226K | SEC |
| Sep 9, 2026 | Smither John W | Director | Sell | 1,600 | $25.32 | $41K | SEC |
| Aug 25, 2026 | Kastelein Johannes Jacob Pieter | Executive Officer | Sell | 125,000 | $26.91 | $3.4M | SEC |
| Jul 22, 2026 | Kooij Louise Frederika | Executive Officer | Sell | 2,915 | $31.71 | $92K | SEC |
| Jul 22, 2026 | Kooij Louise Frederika | Executive Officer | Sell | 31,885 | $31.05 | $990K | SEC |
| Jul 22, 2026 | Kooij Louise Frederika | Executive Officer | Sell | 70,200 | $29.96 | $2.1M | SEC |
| Jun 24, 2026 | Kooij Louise Frederika | Executive Officer | Sell | 300 | $30.73 | $9K | SEC |
| Jun 24, 2026 | Kooij Louise Frederika | Executive Officer | Sell | 39,700 | $30.20 | $1.2M | SEC |
| May 27, 2026 | Kooij Louise Frederika | Executive Officer | Sell | 65,000 | $35.69 | $2.3M | SEC |
| Mar 12, 2026 | LANGE LOUIS G | Director | Sell | 446 | $31.23 | $14K | SEC |
| Mar 12, 2026 | LANGE LOUIS G | Director | Sell | 44,173 | $30.41 | $1.3M | SEC |
| Mar 10, 2026 | LANGE LOUIS G | Director | Sell | 28,186 | $29.41 | $829K | SEC |
| Mar 9, 2026 | Kastelein Johannes Jacob Pieter | Executive Officer | Sell | 104,467 | $30.30 | $3.2M | SEC |
| Mar 9, 2026 | Kastelein Johannes Jacob Pieter | Executive Officer | Sell | 101,409 | $30.29 | $3.1M | SEC |
In the last 12 months NewAmsterdam Pharma Co N.V. insiders made open-market purchases worth about $226,000 and sales worth about $63.3 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
The most recent open-market insider trade in NAMS was filed on 2026-10-02.
195 investment managers reported holding NAMS in SEC Form 13F filings for Q2 2026.
No congressional trades in NAMS were reported in the past two years. The full list is free on CapitalSnitch.
Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1). Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).