13 institutions reported holding $29.6M of NEWAMSTERDAM PHARMA COMPANY (NAMSW) in SEC 13F filings for 2026-03-31. Largest institutional holders: Frazier Life Sciences Management, L.P. ($10.0M), RA CAPITAL MANAGEMENT, L.P. ($6.7M), Affinity Asset Advisors, LLC ($4.9M), Bain Capital Life Sciences Investors, LLC ($2.0M), DEERFIELD MANAGEMENT COMPANY, L.P. ($1.9M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Frazier Life Sciences Management, L.P. | $10.0M | 500,333 | Hold |
| 2 | RA CAPITAL MANAGEMENT, L.P. | $6.7M | 333,333 | Hold |
| 3 | Affinity Asset Advisors, LLC | $4.9M | 245,000 | Hold |
| 4 | Bain Capital Life Sciences Investors, LLC | $2.0M | 99,999 | Hold |
| 5 | DEERFIELD MANAGEMENT COMPANY, L.P. | $1.9M | 92,787 | Hold |
| 6 | MILLENNIUM MANAGEMENT LLC | $1.5M | 75,000 | Hold |
| 7 | SIMPLEX TRADING, LLC | $1.5M | 46,100 | Trimmed |
| 8 | IMC-Chicago, LLC | $566,577 | 17,700 | New |
| 9 | ARISTEIA CAPITAL, L.L.C. | $342,670 | 15,708 | Hold |
| 10 | Vestcor Inc | $131,000 | 6,666 | Trimmed |
| 11 | WOLVERINE ASSET MANAGEMENT LLC | $42,625 | 2,127 | New |
| 12 | GROUP ONE TRADING LLC | $16,005 | 500 | Trimmed |
| 13 | UBS Group AG | $7,936 | 396 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31