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Disclosery

NAMS NEWAMSTERDAM PHARMA COMPANY

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COMMON STOCK (common), issuer CIK 1936258

167 managers (171 13F filers) reported a position in NAMS shares at 2026-03-31, 123,651,391 shares in all. 19 filers opened a position and 37 filers sold out during the quarter.

Managers
167
13F filers
171
New
19
Added
68
Reduced
49
Sold out
37
Shares held by filers
123,651,391

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Frazier Life Sciences Management, L.P.16,943,774$542M13.96%013F-HRTimeline
Capital World Investors11,109,034$356M0.05%+1,125,03413F-HRTimeline
RA CAPITAL MANAGEMENT, L.P.in group RA CAPITAL MANAGEMENT, L.P.9,550,191$306M3.24%013F-HRTimelineGroup
FCPM III SERVICES B.V.in group FCPM III SERVICES B.V.9,198,900$294M40.77%013F-HRTimelineGroup
FMR LLCin group FMR LLC8,765,811$281M0.01%+2,352,82713F-HRTimelineGroup
Bain Capital Life Sciences Investors, L…in group Bain Capital Life Sciences In…7,306,566$234M21.09%013F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…5,115,818$164M0.03%+82,64313F-HRTimelineGroup
DEERFIELD MANAGEMENT COMPANY, L.P.in group DEERFIELD MANAGEMENT COMPANY,…4,264,789$137M1.61%+100,00013F-HRTimelineGroup
VIKING GLOBAL INVESTORS LPin group VIKING GLOBAL INVESTORS LP4,203,567$135M0.38%013F-HRTimelineGroup
Duquesne Family Office LLC3,070,146$98.3M3.35%013F-HRTimeline
Polar Capital Holdings Plcin group Polar Capital Holdings Plc2,831,607$90.6M0.4%+55,38513F-HRTimelineGroup
JENNISON ASSOCIATES LLC2,750,403$88M0.06%-738,81813F-HRTimeline
Medicxi Ventures Management (Jersey) Ltd2,674,182$85.6M8.72%-195,38313F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson2,258,984$72.3M0.03%-82,73913F-HR/ATimelineGroup
WESTFIELD CAPITAL MANAGEMENT CO LP2,202,913$70.5M0.3%new13F-HRTimeline
MAVERICK CAPITAL LTD2,186,402$70M0.81%+292,17613F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,946,374$62.3M0.01%+220,71213F-HRTimelineGroup
Capital International Investorsin group Capital International Investo…1,441,131$46.1M0.01%-621,40413F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.1,199,325$42.1M0.01%-101,55013F-HRTimeline
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…1,106,631$35.4M0.05%-300,00013F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding1,080,261$34.6M-84,380Timeline
Castle Hook Partners LP1,042,637$33.4M0.67%-42,37113F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …957,442$30.6M0.04%+780,42613F-HRTimelineGroup
Cormorant Asset Management, LP950,000$30.4M1.53%-50,00013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.886,616$28.4M<0.01%+36,83713F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/847,089$27.1M<0.01%+387,69813F-HRTimelineGroup
Aberdeen Group plcin group Aberdeen Group plc837,005$26.8M0.04%+107,52113F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO884,228$25.9M<0.01%-115,74813F-HR/ATimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources770,160$24.7M0.01%+1,04013F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC753,054$24.1M0.01%+600,78513F-HR/ATimelineGroup
Woodline Partners LP752,308$24.1M0.09%+1,03813F-HR/ATimeline
TimesSquare Capital Management, LLC751,988$24.1M0.41%-70,31213F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC712,064$22.8M0.02%+76,81713F-HRTimelineGroup
NWI MANAGEMENT LP702,000$22.5M1.37%013F-HR/ATimeline
Logos Global Management LP600,000$19.2M0.99%+150,00013F-HRTimeline
Rock Springs Capital Management LP588,794$18.8M1.11%+31,60013F-HRTimeline
First Turn Management, LLC558,336$17.9M2%-335,13713F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY555,761$17.8M<0.01%+22,95813F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC519,455$16.6M0.01%-83,94613F-HRTimelineGroup
Artia Global Partners LP503,936$16.1M3.64%013F-HRTimeline
Handelsbanken Fonder AB418,900$13.4M0.04%+3,10013F-HRTimeline
KENNEDY CAPITAL MANAGEMENT LLC408,492$13.1M0.28%+235,56113F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp378,800$12.1M<0.01%-13,02713F-HRTimelineGroup
Decheng Capital LLC325,057$10.4M1.57%-267,00013F-HRTimeline
Slate Path Capital LP319,000$10.2M0.15%013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC303,848$9.73M0.01%+49,25213F-HRTimelineGroup
Eversept Partners, LP285,764$9.15M0.6%-135,06313F-HRTimeline
Affinity Asset Advisors, LLC275,000$8.8M0.52%013F-HRTimeline
SEB Asset Management AB272,654$8.73M0.04%13F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP267,105$8.55M0.01%-12,59613F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP264,802$8.48M0.01%new13F-HRTimelineGroup
ArrowMark Colorado Holdings LLC259,524$8.31M0.22%-38,55313F-HRTimeline
Ensign Peak Advisors, Inc249,190$7.98M0.01%-300,32113F-HR/ATimeline
GILDER GAGNON HOWE & CO LLC241,475$7.73M0.09%-7,05313F-HRTimeline
LORD, ABBETT & CO. LLC195,355$6.25M0.02%-5,28313F-HRTimeline
STEMPOINT CAPITAL LP180,658$5.78M1.11%+107,55213F-HR/ATimeline
PEREGRINE CAPITAL MANAGEMENT LLC178,493$5.71M0.21%new13F-HRTimeline
VANGUARD GROUP INCgroup of 3 filers holding173,204$5.54MnewTimeline
VICTORY CAPITAL MANAGEMENT INC172,663$5.53M<0.01%new13F-HRTimeline
Atle Fund Management AB94,796$5.51M1.78%-102,24013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC165,201$5.29M0.01%-256,29013F-HRTimelineGroup
DCF Advisers, LLC160,600$5.14M1.94%013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd144,759$4.63M0.08%+7,26713F-HRTimelineGroup
Nicholas Investment Partners, LP125,136$4.01M0.29%-88,28313F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\124,775$3.99M<0.01%+81213F-HRTimelineGroup
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC118,623$3.8M0.23%013F-HRTimelineGroup
Moody Aldrich Partners LLC114,975$3.68M0.66%-28,57413F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC104,396$3.34M<0.01%+2,00113F-HRTimelineGroup
Swedbank ABin group Swedbank AB100,900$3.23M<0.01%+10,00013F-HRTimelineGroup
ALPS ADVISORS INCin group ALPS ADVISORS INC93,596$3M0.01%+69413F-HRTimelineGroup
Swiss National Bank88,900$2.85M<0.01%013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…84,385$2.7M<0.01%+13,10313F-HRTimelineGroup
Catalio Capital Management, LP83,554$2.67M0.56%new13F-HRTimeline
STATE STREET CORPin group STATE STREET CORP63,090$2.02M<0.01%-5,43313F-HRTimelineGroup
Walleye Capital LLCin group Walleye Capital LLC58,434$1.87M0.01%-37,82713F-HR/ATimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO55,637$1.78M<0.01%+14,59713F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…54,329$1.74M<0.01%+14,05313F-HRTimeline
FRED ALGER MANAGEMENT, LLCin group FRED ALGER MANAGEMENT, LLC54,195$1.73M0.01%+6,66013F-HRTimelineGroup
Mizuho Markets Cayman LPin group MIZUHO FINANCIAL GROUP INC52,227$1.67M0.09%+4,34813F-HRTimelineGroup
DZ BANK AG Deutsche Zentral Genossensch…in group DZ BANK AG Deutsche Zentral G…46,936$1.5M<0.01%-16,36613F-HRTimelineGroup
China Universal Asset Management Co., L…43,703$1.4M0.11%+17,22613F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC43,021$1.38M<0.01%+12,20213F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS37,450$1.2M<0.01%+12,31613F-HRTimelineGroup
Ishara Investments LP36,900$1.18M1.19%+6,90013F-HRTimeline
Pavaki Capital Management LLC36,600$1.17M0.82%new13F-HRTimeline
Knights of Columbus Asset Advisors LLC36,190$1.16M0.07%+3,70713F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc33,476$1.07M<0.01%-7,47513F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP32,218$1.03M<0.01%+8113F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP29,221$935K<0.01%new13F-HRTimelineGroup
Headlands Technologies LLC27,676$886K0.1%new13F-HRTimeline
Bellevue Group AGin group Bellevue Group AG27,661$885K0.02%-8,67513F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC27,336$875K0.02%-6,58313F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC27,050$866K<0.01%-1,82513F-HRTimelineGroup
Eleva Capital SAS25,721$823K0.24%13F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding23,862$764K-218Timeline
Lifetime Wealth Management P.C.23,500$752K0.43%-35,75013F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC22,458$719K<0.01%new13F-HRTimelineGroup
CenterBook Partners LP22,254$712K0.04%+10,19413F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC21,780$697K<0.01%+16,12813F-HRTimelineGroup
Legato Capital Management LLC21,570$690K0.06%-62,26313F-HRTimeline
DNB Asset Management ASin group DNB Asset Management AS21,558$690K<0.01%+1,43913F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…20,921$670K<0.01%+1,11713F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD20,547$658K<0.01%+55013F-HRTimeline
HighVista Strategies LLC20,067$642K0.18%-15,51913F-HRTimeline
DAFNA Capital Management LLC20,000$640K0.15%new13F-HRTimeline
Aquatic Capital Management LLC19,630$628K0.02%-26,35913F-HRTimeline
Caption Management, LLC19,507$624K0.03%+9,97913F-HRTimeline
GLENMEDE TRUST CO NAin group GLENMEDE TRUST CO NA18,575$595K<0.01%-3,64013F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…17,825$571K<0.01%-177,81013F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND17,800$570K<0.01%-8,88013F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…16,800$528K0.01%new13F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC15,550$498K<0.01%-2,02213F-HRTimelineGroup
Mesirow Financial Investment Management…15,430$494K0.01%+7,21513F-HRTimeline
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…15,397$493K<0.01%+2013F-HRTimelineGroup
PSP Research LLC15,000$480K0.34%+8013F-HRTimeline
AlphaCentric Advisors LLC14,656$469K0.47%+92513F-HRTimeline
ALTFEST L J & CO INC13,934$446K0.05%new13F-HRTimeline
PTM WEALTH MANAGEMENT, LLC12,900$440K0.23%013F-HRTimeline
SBI Okasan Asset Management Co.Ltd.14,900$437K0.02%013F-HRTimeline
KEYBANK NATIONAL ASSOCIATION/OHin group KEYBANK NATIONAL ASSOCIATION/…12,480$399K<0.01%-61913F-HRTimelineGroup
ARIZONA STATE RETIREMENT SYSTEM12,375$396K<0.01%-35813F-HRTimeline
LETKO, BROSSEAU & ASSOCIATES INC11,775$377K0.01%013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA11,314$362K<0.01%-12,77013F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …11,302$362K<0.01%-11,39613F-HRTimelineGroup
TWINBEECH CAPITAL LP10,600$339K0.04%-16,80013F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC10,384$332K<0.01%+10213F-HRTimelineGroup
KLP KAPITALFORVALTNING AS9,900$317K<0.01%+80013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…9,119$292K<0.01%+5,43713F-HRTimelineGroup
Creative Planningin group Creative Planning8,357$268K<0.01%-7,28013F-HRTimelineGroup
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…7,319$234K0.06%+17713F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.7,291$233K<0.01%+1,33013F-HRTimelineGroup
Allianz Asset Management GmbHin group Allianz SE6,600$211K<0.01%013F-HRTimelineGroup
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…6,533$209K<0.01%-739,58913F-HRTimelineGroup
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC6,458$207K<0.01%+7013F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\5,474$175K<0.01%+2,05513F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC4,766$153K<0.01%+1,06813F-HRTimelineGroup
Quarry LP4,500$144K0.03%+1,50013F-HRTimeline
Caitong International Asset Management …3,776$121K0.02%+3,75313F-HRTimeline
Freestone Grove Partners LP3,000$96K<0.01%new13F-HRTimeline
AdvisorNet Financial, Inc2,565$82.1K<0.01%new13F-HRTimeline
GF FUND MANAGEMENT CO. LTD.2,546$81.5K<0.01%+31813F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/2,017$64.5K<0.01%013F-HRTimelineGroup
Parallel Advisors, LLC1,410$45.1K<0.01%+1013F-HR/ATimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,198$38.3K<0.01%+25513F-HRTimelineGroup
KBC Group NVin group KBC Group NV1,171$37K<0.01%new13F-HRTimelineGroup
THURSTON, SPRINGER, MILLER, HERD & TITA…1,067$34.2K0.01%013F-HRTimeline
Farther Finance Advisors, LLC1,018$33.4K<0.01%+29413F-HRTimeline
CWM, LLCin group CWM, LLC1,018$32.6K<0.01%+3713F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN900$28.8K<0.01%013F-HR/ATimelineGroup
Cheviot Value Management, LLC796$25.5K<0.01%013F-HRTimeline
Roxbury Financial LLC563$18K0.02%+12013F-HRTimeline
State of Wyoming532$17K<0.01%-6913F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP530$15.9K<0.01%+33113F-HRTimelineGroup
Stone House Investment Management, LLC325$10.4K<0.01%013F-HRTimeline
FIL Ltdin group FIL Ltd217$6.95K<0.01%new13F-HRTimelineGroup
EASTERN BANK187$5.99K<0.01%013F-HRTimeline
Basecamp Wealth Advisors LLC99$3.17K<0.01%013F-HRTimeline
Ascentis Independent Advisorsin group Ascentis Wealth Management, L…60$1.92K<0.01%new13F-HRTimelineGroup
Rachor Investment Advisory Services, LLC28$897<0.01%013F-HRTimeline
True Wealth Design, LLC21$673<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…12$384<0.01%+413F-HR/ATimelineGroup
MAI Capital Management11$353<0.01%new13F-HRTimeline
Allworth Financial LP9$289<0.01%new13F-HRTimeline
Sunbelt Securities, Inc.8$256<0.01%013F-HRTimeline
IFP Advisors, Inc3$96<0.01%013F-HRTimeline
Essential Partners LLC2$64<0.01%013F-HRTimeline
DUPONT CAPITAL MANAGEMENT CORP1$32<0.01%013F-HRTimeline