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MBX Biosciences, Inc.

MBX
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001776111

In the last 90 days, MBX Biosciences, Inc. insiders filed 0 open-market purchases and 1 sale; 172 institutions reported holding it in 13F filings for Q2 2026, worth $3.06B in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding MBX Biosciences, Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025All holders in Q3 2025

13F holders of MBX: Q3 2025 compared with Q4 2025
MeasureQ3 2025Q4 2025Change
Holders118138+20
Shares47.8M48.4M+638.7K (+1.3%)
Value$836.4M$1.53B+$690.9M (+82.6%)

New holders (45)

Institutions that held MBX Biosciences, Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to MBX in Q4 2025
InstitutionSharesValue% of portfolio
Braidwell LP1,018,600$32.1M1.03%
Eventide Asset Management, LLC890,000$28.1M0.44%
D. E. Shaw & Co., Inc.671,838$21.2M0.02%
Trails Edge Capital Partners, LP315,158$9.94M2.46%
Goelzer Investment Management, Inc.221,672$6.99M0.32%
Elmind Capital, LP211,000$6.65M1.96%
KVP Capital Advisors, LP121,524$3.83M3.96%
Jane Street Group, LLC86,581$2.73M0.00%
Advisor Group Holdings, Inc.77,601$2.45M0.00%
Susquehanna International Group, LLP76,528$2.41M0.00%
Verition Fund Management LLC57,575$1.82M0.01%
Squarepoint Ops LLC46,702$1.47M0.00%
Renaissance Technologies LLC32,644$1.03M0.00%
Brevan Howard Capital Management LP25,663$809.4K0.02%
Trexquant Investment LP24,268$765.4K0.01%
Fox Run Management, L.L.C.23,820$751.3K0.12%
Qube Research & Technologies Ltd23,213$732.1K0.00%
Cerity Partners LLC21,323$672.5K0.00%
Gsa Capital Partners LLP19,295$609.0K0.05%
Seven Fleet Capital Management LP18,200$574.0K0.39%
American Century Companies Inc12,236$385.9K0.00%
Canada Pension Plan Investment Board11,600$365.9K0.00%
Graham Capital Management, L.P.11,254$355.0K0.01%
Group One Trading, L.P.9,428$297.4K0.01%
Profund Advisors LLC9,214$290.6K0.01%
Simplex Trading, LLC8,925$281.5K0.01%
Rafferty Asset Management, LLC8,113$255.9K0.00%
SEI Investments Co7,657$241.5K0.00%
ProShare Advisors LLC7,187$226.7K0.00%
Los Angeles Capital Management LLC10,360$225.7K0.00%
Intech Investment Management LLC6,858$216.3K0.00%
Axq Capital, LP6,463$203.8K0.05%
SG Americas Securities, LLC4,765$150.0K0.00%
Mirae Asset Global Investments Co., Ltd.2,182$68.8K0.00%
Cygnus Capital Advisors, LLC1,800$57.0K0.04%
GF Fund Management Co. Ltd.882$27.8K0.00%
Aster Capital Management (DIFC) Ltd265$8.36K0.00%
Daiwa Securities Group Inc.150$5.00K0.00%
UBS Asset Management Americas Inc100$3.15K0.00%
Jones Financial Companies LLLP80$2.52K0.00%
Cornerstone Financial Management LLC34$1.07K0.00%
Global Retirement Partners, LLC19$5990.00%
SBI Securities Co., Ltd.9$2840.00%
True Wealth Design, LLC2$640.00%
IFP Advisors, Inc1$320.00%

Sold out (25)

Institutions that held MBX Biosciences, Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of MBX in Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
Franklin Resources Inc1,307,288$22.9M
Baker Bros. Advisors LP277,777$4.86M
Longaeva Partners L.P.224,433$3.93M
Sectoral Asset Management Inc194,898$3.41M
Hudson Bay Capital Management LP85,000$1.49M
Murchinson Ltd.80,000$1.40M
Exome Asset Management LLC52,402$917.0K
Ikarian Capital, LLC48,071$841.2K
Boothbay Fund Management, LLC39,498$691.2K
Readystate Asset Management LP38,500$673.8K
Ghisallo Capital Management LLC38,250$669.4K
Weiss Asset Management LP30,823$539.4K
SummitTX Capital, L.P.29,310$512.9K
Universal- Beteiligungs- und Servicegesellschaft mbH28,461$498.1K
Caption Management, LLC20,000$350.0K
Walleye Capital LLC15,176$265.6K
Silverarc Capital Management, LLC15,000$262.5K
Man Group plc10,225$178.9K
Symmetry Investments LP10,000$175.0K
Quarry LP6,499$113.7K
FNY Investment Advisers, LLC1,575$27.0K
SRS Capital Advisors, Inc.398$6.96K
Washington Trust Advisors, Inc.83$1.45K
Comerica Bank76$1.33K
Rise Advisors, LLC68$1.19K