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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.

Q2 2025 vs. Q1 2025

How the institutions holding MBX Biosciences, Inc. changed between Q1 2025 and Q2 2025.

All holders in Q2 2025All holders in Q1 2025

13F holders of MBX: Q1 2025 compared with Q2 2025
MeasureQ1 2025Q2 2025Change
Holders7988+9
Shares35.7M36.8M+1.17M (+3.3%)
Value$263.2M$420.3M+$157.1M (+59.7%)

New holders (21)

Institutions that held MBX Biosciences, Inc. at the end of Q2 2025 but not at the end of Q1 2025.

Institutions new to MBX in Q2 2025
InstitutionSharesValue% of portfolio
Sio Capital Management, LLC241,000$2.75M1.10%
Sectoral Asset Management Inc191,825$2.19M1.45%
Resolute Capital Asset Partners LLC49,670$566.7K0.30%
Rockefeller Capital Management L.P.34,135$389.5K0.00%
Bridgeway Capital Management, LLC29,200$333.2K0.01%
AQR Capital Management LLC18,001$205.4K0.00%
XTX Topco Ltd11,861$135.3K0.01%
MetLife Investment Management11,018$125.7K0.00%
Alliancebernstein L.P.10,500$119.8K0.00%
Quarry LP8,000$91.3K0.02%
Nisa Investment Advisors, LLC1,592$18.2K0.00%
Raymond James Financial Inc761$8.68K0.00%
Simplex Trading, LLC411$4.00K0.00%
UMA Financial Services, Inc.109$1.24K0.00%
Parallel Advisors, LLC108$1.23K0.00%
Signaturefd, LLC101$1.15K0.00%
Rise Advisors, LLC68$7760.00%
Russell Investments Group, Ltd.35$3990.00%
Allworth Financial LP25$2860.00%
Rothschild Investment LLC20$2280.00%
Essential Partners LLC2$230.00%

Sold out (12)

Institutions that held MBX Biosciences, Inc. at the end of Q1 2025 and filed for Q2 2025 without it.

Institutions that sold out of MBX in Q2 2025
InstitutionShares, Q1 2025Value, Q1 2025
Affinity Asset Advisors, LLC175,000$1.29M
Marshall Wace, LLP111,211$820.7K
Shay Capital LLC49,133$362.6K
Two Sigma Investments, LP33,833$249.7K
Jump Financial, LLC28,996$214.0K
Squarepoint Ops LLC20,098$148.3K
Verition Fund Management LLC19,815$146.2K
Goldman Sachs Group Inc15,168$111.9K
Gsa Capital Partners LLP12,369$91.0K
Wealthedge Investment Advisors, LLC11,864$87.6K
Corebridge Financial, Inc.5,511$40.7K
True Wealth Design, LLC3$23