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Disclosery

NAMS NEWAMSTERDAM PHARMA COMPANY

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COMMON STOCK (common), issuer CIK 1936258

137 managers (138 13F filers) reported a position in NAMS shares at 2025-09-30, 120,584,215 shares in all. 20 filers opened a position and 15 filers sold out during the quarter.

Managers
137
13F filers
138
New
20
Added
48
Reduced
40
Sold out
15
Shares held by filers
120,584,215

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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.16,701,956$475M14.23%+94,88213F-HRTimeline
Bain Capital Life Sciences Investors, L…in group Bain Capital Life Sciences In…10,719,110$305M20.23%013F-HRTimelineGroup
RA CAPITAL MANAGEMENT, L.P.in group RA CAPITAL MANAGEMENT, L.P.10,138,938$288M3.55%013F-HRTimelineGroup
Capital World Investors9,822,711$279M0.04%+1,434,98613F-HRTimeline
FCPM III SERVICES B.V.in group FCPM III SERVICES B.V.9,212,384$262M52.36%-1,419,72913F-HRTimelineGroup
VIKING GLOBAL INVESTORS LPin group VIKING GLOBAL INVESTORS LP6,475,534$184M0.48%-503,00013F-HRTimelineGroup
FMR LLCin group FMR LLC5,535,293$157M0.01%+3,630,74313F-HRTimelineGroup
DEERFIELD MANAGEMENT COMPANY, L.P.in group DEERFIELD MANAGEMENT COMPANY,…4,266,693$121M1.86%-849,26013F-HRTimelineGroup
JENNISON ASSOCIATES LLC4,198,554$119M0.07%+1,252,45113F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…4,020,126$114M0.02%+697,12913F-HRTimelineGroup
Polar Capital Holdings Plcin group Polar Capital Holdings Plc2,911,634$82.8M0.4%+393,85513F-HRTimelineGroup
Medicxi Ventures Management (Jersey) Ltd2,869,565$81.6M10.96%013F-HRTimeline
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…2,576,631$73.3M0.12%-436,37813F-HRTimelineGroup
Cormorant Asset Management, LP2,175,000$61.9M4.27%013F-HRTimeline
ALLIANCEBERNSTEIN L.P.2,141,778$60.9M0.02%-189,80513F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson2,117,075$60.1M0.03%+155,01513F-HRTimelineGroup
Capital International Investorsin group Capital International Investo…2,062,535$58.7M0.01%013F-HRTimelineGroup
Duquesne Family Office LLC1,923,700$54.7M1.39%+1,091,52513F-HRTimeline
MAVERICK CAPITAL LTD1,504,747$42.8M0.57%-27,12713F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY1,497,479$42.6M<0.01%+859,77213F-HR/ATimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO1,302,498$37M<0.01%-156,39913F-HR/ATimelineGroup
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…1,292,150$36.7M0.04%-524,57513F-HRTimelineGroup
Woodline Partners LP1,157,867$32.9M0.16%-739,33013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC880,552$25M<0.01%-69,42813F-HRTimelineGroup
TimesSquare Capital Management, LLC837,368$23.8M0.34%-35,16913F-HRTimeline
UBS Group AGgroup of 2 filers holding768,520$21.9M-180,003Timeline
Siren, L.L.C.in group Siren, L.L.C.765,705$21.8M0.85%-428,53513F-HRTimelineGroup
First Turn Management, LLC716,971$20.4M3.06%+195,87413F-HRTimeline
Aberdeen Group plcin group Aberdeen Group plc661,946$18.8M0.03%-73,08613F-HRTimelineGroup
Decheng Capital LLC657,051$18.7M3.26%-112,94913F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC624,285$17.8M0.01%+91,36913F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.622,515$17.7M<0.01%+50,84213F-HRTimelineGroup
Rock Springs Capital Management LP595,929$16.9M0.99%+59,81813F-HRTimeline
Eversept Partners, LP488,592$13.9M1.06%+74,16213F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/472,100$13.4M<0.01%-11,90413F-HR/ATimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources405,825$11.5M<0.01%+71,61313F-HRTimelineGroup
Handelsbanken Fonder AB405,800$11.5M0.04%+64,20013F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp332,998$9.47M<0.01%-19,95413F-HRTimelineGroup
Slate Path Capital LP319,000$9.07M0.14%013F-HRTimeline
ArrowMark Colorado Holdings LLC310,999$8.84M0.16%-47,61513F-HRTimeline
Affinity Asset Advisors, LLC275,000$7.82M0.73%013F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC206,461$5.87M<0.01%-113,68213F-HRTimelineGroup
AXA Investment Managers S.A.196,782$5.6M0.02%13F-HRTimeline
Artia Global Partners LP194,838$5.54M0.97%+167,51913F-HR/ATimeline
Nicholas Investment Partners, LP177,538$5.05M0.39%+61,79913F-HRTimeline
DCF Advisers, LLC175,250$4.98M1.89%+2,75013F-HRTimeline
VANGUARD GROUP INCin group VANGUARD GROUP INC172,466$4.9M<0.01%-6,38013F-HRTimelineGroup
Saturn V Capital Management LP153,147$4.36M0.96%-67,54813F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…151,837$4.32M0.01%+62,01013F-HRTimelineGroup
STEMPOINT CAPITAL LP150,573$4.28M0.86%-2,07913F-HRTimeline
KENNEDY CAPITAL MANAGEMENT LLC146,715$4.17M0.09%+133,04013F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC145,327$4.13M<0.01%-62,75413F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/138,329$3.94M<0.01%new13F-HRTimeline
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC114,359$3.25M0.32%+2,00013F-HRTimelineGroup
Ikarian Capital, LLCin group Ikarian Capital, LLC106,800$3.04M0.61%-100,00013F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.104,676$2.98M<0.01%-29,35913F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC101,958$2.9M<0.01%+2,50113F-HRTimelineGroup
Swiss National Bank87,100$2.48M<0.01%+3,20013F-HRTimeline
CenterBook Partners LP70,613$2.01M0.1%+2,42313F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\68,425$1.95M<0.01%+33313F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP63,810$1.81M<0.01%-17,49413F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…47,862$1.36M<0.01%013F-HRTimeline
Lisanti Capital Growth, LLC47,445$1.35M0.33%-1,66513F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc45,738$1.3M<0.01%+1,50313F-HRTimelineGroup
FRED ALGER MANAGEMENT, LLCin group FRED ALGER MANAGEMENT, LLC41,264$1.17M<0.01%+19,22713F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC40,714$1.16M0.03%-19,34013F-HRTimeline
GILDER GAGNON HOWE & CO LLC36,384$1.03M0.01%new13F-HRTimeline
READYSTATE ASSET MANAGEMENT LP34,353$977K0.05%-196,84113F-HRTimeline
Knights of Columbus Asset Advisors LLC33,610$956K0.05%+77713F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP33,299$947K<0.01%+2,98813F-HRTimelineGroup
HighVista Strategies LLC31,831$905K0.22%+12,55713F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding30,290$861K-5,430Timeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS27,328$777K<0.01%-1,94913F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND26,680$759K<0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA26,502$754K<0.01%+8,17013F-HRTimelineGroup
Yarbrough Capital, LLC23,960$681K0.02%013F-HRTimeline
Legato Capital Management LLC23,370$665K0.07%+4,58113F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …22,505$640K<0.01%+11,63713F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC20,959$596K<0.01%+6,68013F-HRTimelineGroup
Atle Fund Management AB193,625$585K2.17%+36,40213F-HRTimeline
China Universal Asset Management Co., L…19,742$561K0.05%-2,80713F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC19,300$549K<0.01%new13F-HRTimelineGroup
TD Asset Management Inc18,000$512K<0.01%new13F-HRTimeline
KEYBANK NATIONAL ASSOCIATION/OHin group KEYBANK NATIONAL ASSOCIATION/…16,014$455K<0.01%new13F-HRTimelineGroup
PTM WEALTH MANAGEMENT, LLC12,900$419K0.25%013F-HRTimeline
Bellevue Group AGin group Bellevue Group AG14,611$416K0.01%-5,94413F-HRTimelineGroup
OMERS ADMINISTRATION Corp13,900$395K<0.01%new13F-HRTimeline
Verition Fund Management LLC13,828$393K<0.01%013F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM13,251$377K<0.01%+48313F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/12,388$352K<0.01%new13F-HRTimelineGroup
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.12,000$341K<0.01%new13F-HRTimelineGroup
LETKO, BROSSEAU & ASSOCIATES INC11,775$335K0.01%013F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS10,783$307K<0.01%-91713F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC10,196$290K<0.01%new13F-HRTimelineGroup
KLP KAPITALFORVALTNING AS9,100$259K<0.01%013F-HRTimeline
Mesirow Financial Investment Management…8,215$234K<0.01%new13F-HRTimeline
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.7,640$217K<0.01%013F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd7,579$216K0.01%new13F-HRTimelineGroup
Avanza Fonder AB7,505$213K0.01%013F-HRTimeline
MARSHALL FINANCIAL GROUP INC /ADV7,500$213K0.06%new13F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…7,404$211K<0.01%-13613F-HRTimeline
Quarry LP6,875$196K0.05%-12513F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC5,718$163K<0.01%-12,15313F-HR/ATimelineGroup
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…5,411$154K0.04%+94013F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC5,102$145K<0.01%+35513F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…3,616$103K<0.01%-97813F-HRTimelineGroup
SIMPLEX TRADING, LLC3,372$95K<0.01%-2,23213F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,972$84.5K<0.01%+2,42413F-HRTimelineGroup
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC2,429$69.1K<0.01%new13F-HRTimelineGroup
GF FUND MANAGEMENT CO. LTD.2,423$68.9K<0.01%+5813F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/1,949$55.3K<0.01%-3213F-HRTimelineGroup
Parallel Advisors, LLC1,400$39.8K<0.01%013F-HRTimeline
GROUP ONE TRADING LLC1,097$31.2K<0.01%+87213F-HRTimeline
THURSTON, SPRINGER, MILLER, HERD & TITA…1,067$30.3K0.06%new13F-HRTimeline
Cheviot Value Management, LLC796$28.8K<0.01%013F-HRTimeline
MATHER GROUP, LLC.1,000$28.4K<0.01%new13F-HRTimeline
CWM, LLCin group CWM, LLC979$28K<0.01%+4213F-HRTimelineGroup
Strategic Wealth Partners, Ltd.975$27.7K<0.01%new13F-HRTimeline
SIGNATUREFD, LLC647$18.4K<0.01%013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN600$17.1K<0.01%+40013F-HRTimelineGroup
State of Wyoming580$16.5K<0.01%+3013F-HRTimeline
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.375$11K<0.01%013F-HRTimelineGroup
Stone House Investment Management, LLC325$9.24K<0.01%013F-HRTimeline
Roxbury Financial LLC324$9.21K0.01%+6013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP249$7.1K<0.01%013F-HRTimelineGroup
Arax Advisory Partners174$4.95K<0.01%new13F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\135$3.84K<0.01%-13713F-HRTimelineGroup
Clearstead Advisors, LLC88$2.5K<0.01%013F-HRTimeline
True Wealth Design, LLC21$598<0.01%013F-HRTimeline
Farther Finance Advisors, LLC16$455<0.01%new13F-HRTimeline
Kilter Group LLC10$285<0.01%013F-HRTimeline
Sunbelt Securities, Inc.8$228<0.01%new13F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…8$228<0.01%013F-HRTimelineGroup
IFP Advisors, Inc3$85<0.01%013F-HR/ATimeline
Essential Partners LLC2$57<0.01%013F-HRTimeline
DUPONT CAPITAL MANAGEMENT CORP1$28<0.01%013F-HRTimeline
NOMURA ASSET MANAGEMENT CO LTDin group NOMURA ASSET MANAGEMENT CO LTD0$00%013F-HRTimelineGroupValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.