NewAmsterdam Pharma Company N.V.
Ownership
Ownership Structure
Who owns NewAmsterdam Pharma Company N.V. (NAMS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 69.7% of the shares are freely tradable; institutional investors hold 104.2%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Frazier Life Sciences Management, L.P. | 14.17 | 16,943,774 | +0.0 | 03/31/2026 |
| Capital World Investors | 10.23 | 12,230,557 | +10.1 | 06/30/2026 |
| RA Capital Management, LLC | 7.99 | 9,550,191 | +0.0 | 03/31/2026 |
| FCPM III SERVICES BV | 7.70 | 9,198,900 | +0.0 | 03/31/2026 |
| FMR Inc | 7.33 | 8,765,811 | +36.7 | 03/31/2026 |
| Bain Capital Life Sciences Investors, LLC | 6.11 | 7,306,566 | +0.0 | 03/31/2026 |
| Deerfield Management Co | 3.57 | 4,264,789 | +2.4 | 03/31/2026 |
| Viking Global Investors LP | 3.52 | 4,203,567 | +0.0 | 03/31/2026 |
| Duquesne Family Office LLC | 2.57 | 3,070,146 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| American Funds SMALLCAP World A | 7.75 | 9,266,080 | +10.4 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Davidson Michael H. | Chief Executive Officer | 792,923 | 19,268,029 $ | Sep 14, 2026 | direct |
| Kastelein Johannes Jacob Pieter | Chief Scientific Officer | 69,302 | 1,684,039 $ | Aug 24, 2026 | indirect |
| Smither John W | Director | 8,760 | 212,868 $ | Sep 4, 2026 | direct |
| Gunning Robert William | Vice President, Controller | 3,200 | 77,760 $ | Sep 1, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 14, 2026 | Davidson Michael H. | Chief Executive Officer | Buy | 10,000 | 22.65 | 226,500 |
| Sep 4, 2026 | Smither John W | Director | Sell | 1,600 | 25.32 | 40,512 |
| Sep 1, 2026 | Gunning Robert William | Vice President, Controller | Other | 3,200 | 0.00 | – |
| Aug 24, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer | Sell | 125,000 | 26.91 | 3,363,750 |
| Aug 24, 2026 | Kastelein Johannes Jacob Pieter | Chief Scientific Officer | Other | 125,000 | – | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.