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
Holders of 5% or more of NAMS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of NewAmsterdam Pharma Co N.V., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 13G/A | 9.90%11.1M shares | 0.00 ppfrom 9.90% | Feb 14, 20252 filings | May 15, 2025 | SEC |
| Capital World Investors | 13G/A | 8.70%9.82M shares | +1.20 ppfrom 7.50% | May 13, 20253 filings | Nov 13, 2025 | SEC |
| Forbion Capital Fund IV Cooperatief U.A. | 13D/A | 8.30%9.32M shares | −1.10 ppfrom 9.40% | Aug 12, 20252 filings | Sep 30, 2025 | SEC |
| Frazier Life Sciences X, L.P. | 13D/A | 7.70%8.62M shares | +1.20 ppfrom 6.50% | Aug 20, 20252 filings | Nov 4, 2025 | SEC |
| Viking Global Investors LPSuperinvestorViking Global Investors | 13G/A | 6.50%6.98M shares | – | Feb 14, 20251 filing | Feb 14, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
12 Schedule 13D and 13G filings on NewAmsterdam Pharma Co N.V., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Dec 4, 20254:30 PM ET | BCLS II Investco, LPand 5 others | 13D/A | 4.70%5.38M shares | −5.29 ppfrom 9.99%Below 5% | Dec 2, 2025 | SEC |
| Nov 13, 20257:06 PM ET | Capital World Investors | 13G/A | 8.70%9.82M shares | +1.20 ppfrom 7.50% | Sep 30, 2025 | SEC |
| Nov 7, 20257:19 PM ET | BCLS II Investco, LPand 5 others | 13D/A | 9.99%11.4M shares | – | Nov 5, 2025 | SEC |
| Nov 4, 20255:23 PM ET | Frazier Life Sciences X, L.P.and 14 others | 13D/A | 7.70%8.62M shares | +1.20 ppfrom 6.50% | Nov 1, 2025 | SEC |
| Sep 30, 20254:47 PM ET | Forbion Capital Fund IV Cooperatief U.A.and 4 others | 13D/A | 8.30%9.32M shares | −1.10 ppfrom 9.40% | Sep 26, 2025 | SEC |
| Aug 20, 20255:28 PM ET | Frazier Life Sciences X, L.P.and 20 others | 13D/A | 6.50%7.33M shares | – | Aug 18, 2025 | SEC |
| Aug 13, 202512:56 PM ET | Capital World Investors | 13G/A | 7.50%8.39M shares | +1.30 ppfrom 6.20% | Jun 30, 2025 | SEC |
| Aug 12, 20254:30 PM ET | Forbion Capital Fund IV Cooperatief U.A.and 4 others | 13D/A | 9.40%10.6M shares | – | Aug 8, 2025 | SEC |
| May 15, 20254:58 PM ET | Ra Capital Management, L.P.and 3 others | 13G/A | 9.90%11.1M shares | 0.00 ppfrom 9.90% | Mar 31, 2025 | SEC |
| May 13, 202511:44 AM ET | Capital World Investors | 13G | 6.20%6.80M shares | New | Mar 31, 2025 | SEC |
| Feb 14, 20256:42 PM ET | Ra Capital Management, L.P.and 3 others | 13G/A | 9.90%10.9M shares | – | Dec 31, 2024 | SEC |
| Feb 14, 20254:50 PM ET | Viking Global Investors LPand 10 othersSuperinvestorViking Global Investors | 13G/A | 6.50%6.98M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell NewAmsterdam Pharma Co N.V. shares.
No Form 144 notices for NewAmsterdam Pharma Co N.V. are on file.