NewAmsterdam Pharma Co N.V.
NAMS- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001936258
In the last 90 days, NewAmsterdam Pharma Co N.V. insiders filed 1 open-market purchase and 3 sales; 194 institutions reported holding it in 13F filings for Q2 2026, worth $4.13B in total; 3 superinvestors hold it, including Viking Global Investors and Maverick Capital.
Other share classesNAMSW
13F holders, Q4 2025
Institutional positions in NewAmsterdam Pharma Co N.V. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 187
- +52 vs. Q3 2025
- Shares held
- 119.3M
- −1.05M (−0.9%) vs. Q3 2025
- Total value
- $4.19B
- +$762.8M (+22.3%) vs. Q3 2025
- New holders
- 61
- 53 more added
- Sold out
- 9
- 51 more reduced
2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting NAMS on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 194 | $4.13B |
| Q1 2026 | 171 | $3.96B |
| Q4 2025 | 187 | $4.19B |
| Q3 2025 | 137 | $3.43B |
| Q2 2025 | 131 | $2.11B |
| Q1 2025 | 126 | $2.28B |
| Q4 2024 | 131 | $2.53B |
| Q3 2024 | 100 | $1.28B |
| Q2 2024 | 90 | $1.38B |
| Q1 2024 | 76 | $1.71B |
| Q4 2023 | 32 | $691.4M |
| Q3 2023 | 35 | $464.1M |
| Q2 2023 | 29 | $580.6M |
| Q1 2023 | 19 | $444.9M |
| Q4 2022 | 14 | $362.2M |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding NewAmsterdam Pharma Co N.V.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| California State Teachers Retirement System | 40,276 | $1.41M | 0.00% | −7,586−15.8% | Reduced |
| Legal & General Group Plc | 40,951 | $1.44M | 0.00% | −4,787−10.5% | Reduced |
| SEI Investments Co | 41,040 | $1.44M | 0.00% | +41,040 | New |
| Ikarian Capital, LLC | 45,830 | $1.61M | 0.21% | −60,970−57.1% | Reduced |
| Aquatic Capital Management LLC | 45,989 | $1.61M | 0.05% | +45,989 | New |
| Fred Alger Management, LLC | 47,535 | $1.67M | 0.01% | +6,271+15.2% | Added |
| Jain Global LLC | 47,584 | $1.67M | 0.02% | +47,584 | New |
| Mizuho Markets Cayman LP | 47,879 | $1.68M | 0.08% | +47,879 | New |
| Lifetime Wealth Management P.C. | 59,250 | $2.08M | 1.31% | +59,250 | New |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 63,302 | $2.22M | 0.00% | +63,302 | New |
| State Street Corp | 68,523 | $2.40M | 0.00% | +4,713+7.4% | Added |
| Russell Investments Group, Ltd. | 71,282 | $2.50M | 0.00% | +71,282 | New |
| StemPoint Capital LP | 73,106 | $2.56M | 0.44% | −77,467−51.4% | Reduced |
| Centiva Capital, LP | 80,000 | $2.81M | 0.17% | +80,000 | New |
| Legato Capital Management LLC | 83,833 | $2.94M | 0.25% | +60,463+258.7% | Added |
| JTC Employer Solutions Trusteee Ltd | 75,500 | $3.02M | 0.20% | +75,500 | New |
| Swiss National Bank | 88,900 | $3.12M | 0.00% | +1,800+2.1% | Added |
| Swedbank AB | 90,900 | $3.19M | 0.00% | +90,900 | New |
| Alps Advisors Inc | 92,902 | $3.26M | 0.02% | +92,902 | New |
| Walleye Capital LLC | 96,261 | $3.38M | 0.02% | +96,261 | New |
| Geode Capital Management, LLC | 102,395 | $3.59M | 0.00% | +437+0.4% | Added |
| Price T Rowe Associates Inc | 116,258 | $4.08M | 0.00% | −22,071−16.0% | Reduced |
| ADAR1 Capital Management, LLC | 118,623 | $4.16M | 0.31% | +4,264+3.7% | Added |
| Deutsche Bank AG | 123,963 | $4.35M | 0.00% | +55,538+81.2% | Added |
| XTX Topco Ltd | 137,492 | $4.82M | 0.13% | +129,913+1,714.1% | Added |
| Moody Aldrich Partners LLC | 143,549 | $5.04M | 0.94% | +143,549 | New |
| Ameriprise Financial Inc | 152,269 | $5.34M | 0.00% | +6,942+4.8% | Added |
| DCF Advisers, LLC | 160,600 | $5.63M | 1.86% | −14,650−8.4% | Reduced |
| Kennedy Capital Management, Inc. | 172,931 | $6.07M | 0.13% | +26,216+17.9% | Added |
| Vanguard Group Inc | 172,956 | $6.07M | 0.00% | +490+0.3% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 177,016 | $6.21M | 0.01% | +177,016 | New |
| Lisanti Capital Growth, LLC | 179,410 | $6.29M | 1.49% | +131,965+278.1% | Added |
| Susquehanna International Group, LLP | 195,635 | $6.86M | 0.01% | +43,798+28.8% | Added |
| HealthInvest Partners AB | 197,036 | $6.91M | 2.21% | +3,411+1.8% | Added |
| Lord, Abbett & Co. LLC | 200,638 | $7.04M | 0.02% | +200,638 | New |
| Nicholas Investment Partners, LP | 213,419 | $7.49M | 0.55% | +35,881+20.2% | Added |
| Gilder Gagnon Howe & Co LLC | 248,528 | $8.72M | 0.09% | +212,144+583.1% | Added |
| Millennium Management LLC | 254,596 | $8.93M | 0.01% | +254,596 | New |
| UBS Asset Management Americas Inc | 265,199 | $9.30M | 0.00% | +265,199 | New |
| Affinity Asset Advisors, LLC | 275,000 | $9.65M | 0.69% | 00.0% | Unchanged |
| First Trust Advisors LP | 279,701 | $9.81M | 0.01% | +279,701 | New |
| ArrowMark Colorado Holdings LLC | 298,077 | $10.5M | 0.23% | −12,922−4.2% | Reduced |
| Slate Path Capital LP | 319,000 | $11.2M | 0.15% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 391,827 | $13.7M | 0.00% | +58,829+17.7% | Added |
| Handelsbanken Fonder AB | 415,800 | $14.6M | 0.04% | +10,000+2.5% | Added |
| Eversept Partners, LP | 420,827 | $14.8M | 0.83% | −67,765−13.9% | Reduced |
| Jane Street Group, LLC | 421,491 | $14.8M | 0.02% | +421,491 | New |
| Logos Global Management LP | 450,000 | $15.8M | 1.05% | +450,000 | New |
| Bank of America Corp | 459,391 | $16.1M | 0.00% | −12,709−2.7% | Reduced |
| Artia Global Partners LP | 503,936 | $17.7M | 2.84% | +309,098+158.6% | Added |
| Morgan Stanley | 532,803 | $18.7M | 0.00% | −964,676−64.4% | Reduced |
| Ensign Peak Advisors, Inc | 549,511 | $19.3M | 0.03% | +549,511 | New |
| Rock Springs Capital Management LP | 557,194 | $19.5M | 1.00% | −38,735−6.5% | Reduced |
| Decheng Capital LLC | 592,057 | $20.8M | 2.79% | −64,994−9.9% | Reduced |
| American Century Companies Inc | 603,401 | $21.2M | 0.01% | −20,884−3.3% | Reduced |
| Citadel Advisors LLC | 635,247 | $22.3M | 0.02% | +428,786+207.7% | Added |
| Nwi Management LP | 702,000 | $24.6M | 1.51% | +702,000 | New |
| Standard Life Aberdeen plc | 729,484 | $25.6M | 0.04% | +67,538+10.2% | Added |
| Pictet Asset Management Holding SA | 746,122 | $26.2M | 0.03% | −546,028−42.3% | Reduced |
| Woodline Partners LP | 751,270 | $26.4M | 0.10% | −406,597−35.1% | Reduced |
| Franklin Resources Inc | 769,120 | $27.0M | 0.01% | +363,295+89.5% | Added |
| TimesSquare Capital Management, LLC | 822,300 | $28.8M | 0.43% | −15,068−1.8% | Reduced |
| BlackRock, Inc. | 849,779 | $29.8M | 0.00% | +227,264+36.5% | Added |
| First Turn Management, LLC | 893,473 | $31.3M | 3.58% | +176,502+24.6% | Added |
| UBS Group AG | 899,442 | $31.6M | 0.01% | +130,922+17.0% | Added |
| JPMorgan Chase & Co | 999,976 | $35.1M | 0.00% | −302,522−23.2% | Reduced |
| Cormorant Asset Management, LP | 1,000,000 | $35.1M | 1.99% | −1,175,000−54.0% | Reduced |
| Castle Hook Partners LP | 1,085,008 | $38.1M | 0.55% | +1,085,008 | New |
| Alliancebernstein L.P. | 1,300,875 | $45.6M | 0.01% | −840,903−39.3% | Reduced |
| Adage Capital Partners GP, L.L.C. | 1,406,631 | $49.3M | 0.07% | −1,170,000−45.4% | Reduced |
| Goldman Sachs Group Inc | 1,725,662 | $60.5M | 0.01% | +845,110+96.0% | Added |
| Maverick Capital LtdSuperinvestorMaverick Capital | 1,894,226 | $66.4M | 0.71% | +389,479+25.9% | Added |
| Capital International Investors | 2,062,535 | $72.4M | 0.01% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 2,341,723 | $82.3M | 0.04% | +224,648+10.6% | Added |
| Polar Capital Holdings Plc | 2,776,222 | $97.4M | 0.45% | −135,412−4.7% | Reduced |
| Medicxi Ventures Management (Jersey) Ltd | 2,869,565 | $100.7M | 12.06% | 00.0% | Unchanged |
| Duquesne Family Office LLCSuperinvestorDuquesne Family Office | 3,070,146 | $107.7M | 2.55% | +1,146,446+59.6% | Added |
| Jennison Associates LLC | 3,489,221 | $122.4M | 0.07% | −709,333−16.9% | Reduced |
| Deerfield Management Company, L.P. (Series C) | 4,164,789 | $146.1M | 1.87% | −101,904−2.4% | Reduced |
| Viking Global Investors LPSuperinvestorViking Global Investors | 4,203,567 | $147.5M | 0.39% | −2,271,967−35.1% | Reduced |
| Wellington Management Group LLP | 5,033,175 | $176.6M | 0.03% | +1,013,049+25.2% | Added |
| FMR LLC | 6,412,984 | $225.0M | 0.01% | +877,691+15.9% | Added |
| Bain Capital Life Sciences Investors, LLC | 7,306,566 | $256.3M | 19.63% | −3,412,544−31.8% | Reduced |
| FCPM III Services B.V. | 9,198,900 | $322.7M | 42.30% | −13,484−0.1% | Reduced |
| Ra Capital Management, L.P. | 9,550,191 | $335.0M | 3.43% | −588,747−5.8% | Reduced |
| Capital World Investors | 9,984,000 | $350.2M | 0.05% | +161,289+1.6% | Added |
| Frazier Life Sciences Management, L.P. | 16,943,774 | $594.4M | 15.96% | +241,818+1.4% | Added |
| Siren, L.L.C. | 0 | $0 | 0.00% | −765,705−100.0% | Sold out |
| Saturn V Capital Management LLC | 0 | $0 | 0.00% | −153,147−100.0% | Sold out |
| Readystate Asset Management LP | 0 | $0 | 0.00% | −34,353−100.0% | Sold out |
| Omers Administration Corp | 0 | $0 | 0.00% | −13,900−100.0% | Sold out |
| Bank of Montreal | 0 | $0 | 0.00% | −12,388−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −3,372−100.0% | Sold out |
| Mather Group, LLC. | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| SRS Capital Advisors, Inc. | 0 | $0 | 0.00% | −174−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −88−100.0% | Sold out |
| AXA Investment Managers S.A. | – | – | – | – | Not filed |
| Marshall Financial Group Inc | – | – | – | – | Not filed |