13F

Stock

MBX Biosciences, Inc.

MBX · held by 157 managers

Reported value

$1.54B

Holders

157

+33 new · −18 exited

Holders’ est. mark

−$68M

Price effect on 118 books still in the name

Largest holder

$198.6M

Frazier Life Sciences Management, L.P.

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
Frazier Life Sciences Management, L.P.6.65M$198.6M−$11.2MCut−$11.2M
ORBIMED ADVISORS LLC3.64M$108.6M−$6.15MCut−$15.5M
NEA Management Company, LLC3.61M$107.9M−$6.11MCut−$6.11M
WELLINGTON MANAGEMENT GROUP LLP3.19M$95.3M−$5.39MCut−$10.4M
BlackRock, Inc.2.94M$87.8M−$4.93MCut−$4.29M
Fidelity2.94M$87.7M−$26.6KAdded$87.2M
Deep Track Capital, LP2.76M$82.3M−$4.66MCut−$20.2M
NVP ASSOCIATES, LLC2.14M$63.8M−$3.61MCut−$3.61M
Polar Capital Holdings Plc1.62M$48.4MNew
BRAIDWELL LP1.49M$44.6M−$1.72MAdded$12.4M
VANGUARD CAPITAL MANAGEMENT LLC1.48M$44.1MHeld
Aaron Wealth Advisors LLC1.17M$34.9M−$118.3KAdded$32.7M
Cormorant Asset Management, LP1.12M$33.4M−$1.89MCut−$1.89M
Driehaus Capital Management LLC1.02M$30.4M−$1.72MCut−$14M
Kynam Capital Management, LP934.8K$27.9M−$1.58MCut−$1.58M
Citadel932.8K$27.8M−$1.37MAdded$2.3M
Woodline Partners LP900.1K$26.9M−$1.52MCut−$4.68M
EVENTIDE ASSET MANAGEMENT, LLC890K$26.6M−$1.5MCut−$1.5M
Caligan Partners LP848.6K$25.3MNew
Parkman Healthcare Partners LLC800K$23.9M−$1.35MCut−$4.05M
State Street787.2K$23.5M−$1.14MAdded$2.28M
EcoR1 Capital, LLC777K$23.2M−$1.31MCut−$43.8M
GEODE CAPITAL MANAGEMENT, LLC670.4K$20M−$1.1MCut−$470.8K
TCG Crossover Management, LLC650K$19.4M−$1.1MCut−$1.1M
MILLENNIUM MANAGEMENT LLC564.4K$16.8M−$780.9KAdded$2.27M
STEMPOINT CAPITAL LP499.5K$14.9M−$132.8KAdded$12.4M
GOLDMAN SACHS GROUP INC457.9K$13.7M−$561KAdded$3.2M
UBS Group AG346.9K$10.4M−$475.2KAdded$1.49M
Candriam S.C.A.294.4K$8.79MNew
VANGUARD PORTFOLIO MANAGEMENT LLC293.3K$8.75MHeld
D. E. Shaw & Co., Inc.288.9K$8.62M−$488.2KCut−$12.6M
Rock Springs Capital Management LP288K$8.6M−$477.6KCut−$318.1K
Opaleye Management Inc.260K$7.76M−$439.4KCut−$439.4K
CHARLES SCHWAB INVESTMENT MANAGEMENT INC214.9K$6.42M−$363.2KCut−$592.6K
Elmind Capital, LP211K$6.3M−$356.6KCut−$356.6K
NORTHERN TRUST CORP210.6K$6.29M−$322.6KAdded$265.3K
BOOTHBAY FUND MANAGEMENT, LLC208K$6.21MNew
Soleus Capital Management, L.P.178.9K$5.34M−$302.3KCut−$7.56M
DAFNA Capital Management LLC175.5K$5.24M−$279.3KAdded$25.2K
VANGUARD FIDUCIARY TRUST CO170.2K$5.08MHeld
Goelzer Investment Management, Inc.164.2K$4.9M−$277.4KCut−$2.09M
Affinity Asset Advisors, LLC150K$4.48M−$253.5KCut−$3.41M
Tetragon Partners GP Ltd145.5K$4.34M−$242.2KCut−$178K
JPMORGAN CHASE & CO147.1K$3.96M−$67.7KAdded$3.5M
Schonfeld Strategic Advisors LLC123.8K$3.7M−$209.2KCut−$1.58M
KVP Capital Advisors, LP121.5K$3.63M−$205.4KCut−$205.4K
TD Asset Management Inc116K$3.46M−$171.5KAdded$262.8K
TWO SIGMA INVESTMENTS, LP115.1K$3.43M−$194.5KCut−$935.5K
BURKEHILL GLOBAL MANAGEMENT, LP100K$2.98M−$169KCut−$169K
Squarepoint Ops LLC97.2K$2.9M−$78.9KAdded$1.43M
MANUFACTURERS LIFE INSURANCE COMPANY, THE90.6K$2.71M−$78.7KAdded$550.7K
Nuveen, LLC81.8K$2.44M−$127.7KAdded$58.2K
Bank of New York Mellon Corp80.2K$2.39M−$127.2KAdded$20.9K
PFM Health Sciences, LP71.9K$2.15M−$121.5KCut−$355.4K
VICTORY CAPITAL MANAGEMENT INC71K$2.12MNew
MARSHALL WACE, LLP62.7K$1.87MNew
XTX Topco Ltd53.2K$1.59M−$34KAdded$953.1K
SCHRODER INVESTMENT MANAGEMENT GROUP57.3K$1.54M−$228.1KCut−$735.3K
DIMENSIONAL FUND ADVISORS LP46.8K$1.4MNew
Swiss National Bank44.4K$1.33MNew
PLATINUM INVESTMENT MANAGEMENT LTD43.6K$1.3M−$73.7KCut−$73.7K
ALPS ADVISORS INC36.5K$1.09M−$61.8KCut−$71.9K
Creative Planning36K$1.07M−$56.9KAdded$12.4K
EXCHANGE TRADED CONCEPTS, LLC34.3K$1.02MNew
RHUMBLINE ADVISERS33.9K$1.01M−$56.5KCut−$43K
ALLIANCEBERNSTEIN L.P.30.5K$962K$0Added$82K
MORGAN STANLEY31.6K$942.1K−$53.3KCut−$919.6K
BANK OF AMERICA CORP /DE/28.8K$858.2K−$48.6KCut−$337K
ExodusPoint Capital Management, LP28.1K$838.4K−$47.5KCut−$959.5K
Invesco Ltd.27.5K$821.6K−$35.8KAdded$152.9K
Icahn Capital27.4K$817.5K−$46.3KCut−$173.1K
DEUTSCHE BANK AG\22.9K$685.1K−$33.8KAdded$53.4K
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM22.8K$679.5K−$2.96KAdded$624.2K
Swiss Life Asset Management Ltd12.1K$657.2KNew
Cerity Partners LLC21.2K$631.7K−$35.8KCut−$40.8K
Legal & General Group Plc19.4K$577.8K−$4.29KAdded$497.8K
STATE OF WISCONSIN INVESTMENT BOARD19.3K$575KNew
Koa Wealth Management, LLC17.9K$534.7K−$30.3KCut−$46K
Engineers Gate Manager LP17.4K$518.8KNew
Qube Research & Technologies Ltd17.2K$513K−$29KCut−$219.1K
Vanguard Global Advisers, LLC16K$478.4KHeld
MetLife Investment Management, LLC16K$478.1K−$27.1KCut−$27.1K
VANGUARD ASSET MANAGEMENT, Ltd14.8K$440.3KHeld
Optimize Financial Inc14.5K$433.1KNew
CITIGROUP INC13.5K$402.9K−$22.8KCut−$114K
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.13.3K$397.8K−$22.4KCut−$20.4K
Jump Financial, LLC12.7K$379.1KNew
BARCLAYS PLC11.8K$353.4K−$20KCut−$1.31M
HighVista Strategies LLC11.5K$342.4KNew
CANADA PENSION PLAN INVESTMENT BOARD10.9K$325.4K−$18.4KCut−$40.5K
WELLS FARGO & COMPANY/MN10.8K$321.2K−$18.2KCut−$685.9K
BNP PARIBAS FINANCIAL MARKETS10.4K$310K−$11.5KAdded$96K
JANUS HENDERSON GROUP PLC10.3K$308.2KNew
Verition Fund Management LLC10.2K$305.1K−$17.3KCut−$1.51M
Aquatic Capital Management LLC10.2K$303.1KNew
SUSQUEHANNA INTERNATIONAL GROUP, LLP9.49K$283.2K−$16KCut−$2.13M
Virtus Investment Advisers, LLC9.13K$272.6K−$15.1KCut−$8.46K
NEW YORK STATE COMMON RETIREMENT FUND9K$268.6K−$7.27KAdded$133K
ACT CAPITAL MANAGEMENT, LLC9K$268.6KNew
SEI INVESTMENTS CO8.99K$268.3K−$12.9KAdded$26.8K
Tidal Investments LLC8.88K$265KNew
TEMA ETFS LLC8.88K$265KNew
AMERICAN CENTURY COMPANIES INC8.73K$260.5K−$14.7KCut−$125.5K
PROFUND ADVISORS LLC8.39K$250.4K−$14.2KCut−$40.2K
China Universal Asset Management Co., Ltd.7.97K$237.8K−$13.5KCut−$245.3K
Orion Porfolio Solutions, LLC7.95K$237.3KNew
State of New Jersey Common Pension Fund D7.67K$229KNew
Police & Firemen's Retirement System of New Jersey7.52K$224.5K−$12.7KCut−$12.7K
BRIDGEWAY CAPITAL MANAGEMENT, LLC7.5K$223.9K−$12.7KCut−$91.5K
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC7.24K$216.1K−$169Added$212.9K
INTECH INVESTMENT MANAGEMENT LLC6.84K$204.3K−$11.6KCut−$12K
GROUP ONE TRADING LLC6.25K$186.6K−$10.6KCut−$110.8K
Vanguard Investments Australia, Ltd.6.1K$182.2KHeld
LOS ANGELES CAPITAL MANAGEMENT LLC5.6K$167.2K$45.1KCut−$58.6K
KLP KAPITALFORVALTNING AS4.9K$146.3KNew
Russell Investments Group, Ltd.3.86K$115.1K−$4.83KAdded$25K
Rockefeller Capital Management L.P.3.22K$96.2K−$5.07KAdded$1.62K
Mirae Asset Global Investments Co., Ltd.2.34K$69.9K−$3.69KAdded$1.09K
Ameritas Investment Partners, Inc.2.31K$69K−$3.91KCut−$3.91K
CWM, LLC1.77K$52.9K$52.8KAdded$52.8K
STRS OHIO1.6K$47.8K−$1.18KAdded$25.7K
NISA INVESTMENT ADVISORS, LLC1.59K$47.5K−$2.69KCut−$2.69K
Tower Research Capital LLC (TRC)1.41K$42.1K−$2.38KCut−$65.6K
SIMPLEX TRADING, LLC1.31K$39K−$2.21KCut−$242.5K
PRICE T ROWE ASSOCIATES INC /MD/1.03M$30.7K−$1.42KAdded$4.21K
GF FUND MANAGEMENT CO. LTD.1.01K$30.1K−$1.49KAdded$2.3K
Sterling Capital Management LLC949$28.3K−$1.6KCut−$23.4K
ROYAL BANK OF CANADA751$22K−$2.02KCut−$27K
Zurcher Kantonalbank (Zurich Cantonalbank)470$14KNew
GAMMA Investing LLC299$8.93K−$505Cut−$505
US BANCORP \DE\284$8.48K−$480Cut−$1.36K
OSAIC HOLDINGS, INC.269$8.03K−$455Cut−$2.44M
PNC Financial Services Group, Inc.207$6.18K−$333Cut−$5
SIGNATUREFD, LLC179$5.34K−$303Cut−$303
FIL Ltd178$5.31KNew
Physician Wealth Advisors, Inc.109$3.25K−$184Cut−$184
JONES FINANCIAL COMPANIES LLLP80$2.28K−$243Cut−$243
Allworth Financial LP70$2.09K−$88Added$449
Parallel Advisors, LLC61$1.82K−$103Cut−$103
Larson Financial Group LLC49$1.46KNew
ALGERT GLOBAL LLC36K$1.07KNew
Cornerstone Financial Management LLC34$1.01K−$57Cut−$57
EverSource Wealth Advisors, LLC25$746−$43Cut−$43
ROTHSCHILD INVESTMENT LLC24$716−$41Cut−$41
Versant Capital Management, Inc24$716New
Fortitude Family Office, LLC19$567New
Keating Financial Advisory Services, Inc.16$478New
Essential Partners LLC15$448−$25Cut−$25
Farther Finance Advisors, LLC9$291$8Cut−$24
ACADIAN ASSET MANAGEMENT LLC8.82K$262−$16Cut−$1.27K
MAI Capital Management7$209New
SG Americas Securities, LLC3.39K$101−$6Cut−$49
True Wealth Design, LLC2$60−$4Cut−$4
Cygnus Capital Advisors, LLC1.8K$54−$3Cut−$3
IFP Advisors, Inc1$30−$2Cut−$2
KBC Group NV810$24New
Covestor Ltd3$0New

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.