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Disclosery

MBX MBX BIOSCIENCES INC

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Stock (common), issuer CIK 1776111

89 managers (89 13F filers) reported a position in MBX shares at 2025-06-30, 36,839,367 shares in all. 20 filers opened a position and 12 filers sold out during the quarter.

Managers
89
13F filers
89
New
20
Added
40
Reduced
14
Sold out
12
Shares held by filers
36,839,367

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, Q2 2025

Filers in the available 13F reports with a share position at 2025-06-30, 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.5,985,347$68.3M2.73%013F-HRTimeline
ORBIMED ADVISORS LLCin group ORBIMED ADVISORS LLC4,002,887$45.7M1.15%013F-HRTimelineGroup
NEA Management Company, LLC3,614,486$41.2M3.1%013F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…2,266,628$25.9M<0.01%-371,89313F-HRTimelineGroup
Deep Track Capital, LP2,188,592$25M0.8%-830,34313F-HRTimeline
NVP ASSOCIATES, LLC2,136,335$24.4M13.24%013F-HRTimeline
Driehaus Capital Management LLC1,571,906$17.9M0.14%-7,30113F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/1,346,910$15.4M<0.01%+245,99413F-HRTimeline
MPM BIOIMPACT LLC1,294,416$14.8M2.56%+161,46613F-HRTimeline
EcoR1 Capital, LLC1,149,794$13.1M0.78%-109,47913F-HRTimeline
VANGUARD GROUP INCin group VANGUARD GROUP INC1,043,684$11.9M<0.01%+378,12113F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.1,011,546$11.5M<0.01%+228,50413F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.973,787$11.1M0.03%+863,30513F-HRTimelineGroup
Woodline Partners LP901,103$10.3M0.05%+23,64213F-HRTimeline
Parkman Healthcare Partners LLC871,933$9.95M1.15%+543,61013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC766,840$8.75M0.01%+596,40013F-HRTimelineGroup
Cormorant Asset Management, LP700,000$7.99M0.59%013F-HRTimeline
TCG Crossover Management, LLC650,000$7.42M0.85%013F-HRTimeline
Schonfeld Strategic Advisors LLC631,413$7.2M0.05%+430,77113F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources494,852$5.65M<0.01%+125,53713F-HRTimelineGroup
RA CAPITAL MANAGEMENT, L.P.in group RA CAPITAL MANAGEMENT, L.P.377,841$4.31M0.07%-1,133,49313F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC348,447$3.98M<0.01%+73,98913F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP265,119$3.03M<0.01%+87,89913F-HRTimelineGroup
Sio Capital Management, LLC241,000$2.75M1.1%new13F-HRTimeline
Opaleye Management Inc.239,319$2.73M0.55%-10,68113F-HR/ATimeline
SECTORAL ASSET MANAGEMENT INC191,825$2.19M1.45%new13F-HRTimeline
TD Asset Management Inc171,304$1.95M<0.01%+19,80013F-HRTimeline
STEMPOINT CAPITAL LP141,021$1.61M0.52%+44,40613F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP115,594$1.32M<0.01%+19,08713F-HRTimelineGroup
PLATINUM INVESTMENT MANAGEMENT LTD112,743$1.29M0.09%-73,18913F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co107,483$1.23M<0.01%+12,93713F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …87,097$994K<0.01%+36,98713F-HRTimelineGroup
Walleye Capital LLCin group Walleye Capital LLC70,333$802K0.01%+37,84313F-HRTimelineGroup
Exome Asset Management LLC63,076$720K0.59%-70,03713F-HR/ATimeline
FMR LLCin group FMR LLC61,333$700K<0.01%+17,09313F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC58,541$668K<0.01%+46,72313F-HR/ATimelineGroup
Aaron Wealth Advisors LLC50,000$570K0.06%013F-HRTimeline
Resolute Capital Asset Partners LLC49,670$567K0.3%new13F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/42,387$484K<0.01%+14,29713F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp38,032$434K<0.01%+14,12213F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…34,135$389K<0.01%new13F-HR/ATimelineGroup
Koa Wealth Management, LLC31,752$362K0.29%+12,35613F-HRTimeline
UBS Group AGin group UBS Group AG30,967$353K<0.01%+3,46813F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC29,200$333K0.01%new13F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…27,632$315K<0.01%+13,97213F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY24,008$274K<0.01%-90,60213F-HRTimelineGroup
RHUMBLINE ADVISERS23,662$270K<0.01%+14,95013F-HRTimeline
Nuveen, LLCin group TIAA22,143$253K<0.01%+7,67213F-HRTimelineGroup
ALPS ADVISORS INCin group ALPS ADVISORS INC18,048$206K<0.01%-7,98613F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC18,001$205K<0.01%new13F-HRTimelineGroup
PRELUDE CAPITAL MANAGEMENT, LLC15,617$178K0.02%-24,60813F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC14,271$163K<0.01%+3,54313F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd11,861$135K0.01%new13F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…11,018$126K<0.01%new13F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN10,943$125K<0.01%+4,96613F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.10,500$120K<0.01%new13F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…9,329$106K<0.01%+2,68213F-HRTimelineGroup
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…8,772$100K0.03%+76613F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\8,762$100K<0.01%013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO8,184$93.4K<0.01%-193,05113F-HRTimelineGroup
Quarry LP8,000$91.3K0.02%new13F-HRTimeline
CITIGROUP INCin group CITIGROUP INC5,723$65.3K<0.01%-91,60513F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND4,300$49.1K<0.01%013F-HR/ATimeline
Police & Firemen's Retirement System of…2,143$24.5K<0.01%013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,110$24.1K<0.01%+74513F-HRTimelineGroup
CWM, LLCin group CWM, LLC1,802$21K<0.01%+1,66513F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC1,592$18.2K<0.01%new13F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc1,551$17.7K<0.01%+44413F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS1,329$15.2K<0.01%-29,58713F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,298$15K<0.01%+66313F-HR/ATimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…1,177$13.4K<0.01%013F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…1,064$12.1K<0.01%+23213F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC761$8.68K<0.01%new13F-HRTimelineGroup
STRS OHIO700$7.99K<0.01%013F-HRTimeline
Sterling Capital Management LLC460$5.25K<0.01%+36913F-HR/ATimeline
SIMPLEX TRADING, LLC411$4K<0.01%new13F-HRTimeline
AMALGAMATED BANK384$4K<0.01%013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\337$3.85K<0.01%+713F-HRTimelineGroup
GAMMA Investing LLC299$3.41K<0.01%+27913F-HRTimeline
Physician Wealth Advisors, Inc.109$1.24K<0.01%new13F-HRTimeline
Parallel Advisors, LLC108$1.23K<0.01%new13F-HRTimeline
SIGNATUREFD, LLC101$1.15K<0.01%new13F-HRTimeline
Rise Advisors, LLC68$776<0.01%new13F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…35$399<0.01%new13F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…29$331<0.01%+2013F-HRTimelineGroup
Allworth Financial LP25$286<0.01%new13F-HRTimeline
ROTHSCHILD INVESTMENT LLC20$228<0.01%new13F-HRTimeline
Essential Partners LLC2$23<0.01%13F-HRTimeline
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.