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.
13F holders, Q3 2025
Institutional positions in MBX Biosciences, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 118
- +30 vs. Q2 2025
- Shares held
- 47.8M
- +11.0M (+29.7%) vs. Q2 2025
- Total value
- $836.4M
- +$416.0M (+99.0%) vs. Q2 2025
- New holders
- 39
- 29 more added
- Sold out
- 9
- 30 more reduced
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MBX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 172 | $3.06B |
| Q1 2026 | 157 | $1.57B |
| Q4 2025 | 138 | $1.53B |
| Q3 2025 | 118 | $836.4M |
| Q2 2025 | 88 | $420.3M |
| Q1 2025 | 79 | $263.2M |
| Q4 2024 | 63 | $606.5M |
| Q3 2024 | 45 | $784.1M |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding MBX Biosciences, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Essential Partners LLC | 2 | $35 | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 20 | $350 | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 23 | $403 | 0.00% | −6−20.7% | Reduced |
| Allworth Financial LP | 25 | $438 | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 61 | $1.07K | 0.00% | −47−43.5% | Reduced |
| Rise Advisors, LLC | 68 | $1.19K | 0.00% | 00.0% | Unchanged |
| Comerica Bank | 76 | $1.33K | 0.00% | +76 | New |
| Washington Trust Advisors, Inc. | 83 | $1.45K | 0.00% | +83 | New |
| UMA Financial Services, Inc. | 109 | $1.91K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 178 | $3.12K | 0.00% | −5,545−96.9% | Reduced |
| Signaturefd, LLC | 179 | $3.13K | 0.00% | +78+77.2% | Added |
| The PNC Financial Services Group, Inc. | 252 | $4.41K | 0.00% | +252 | New |
| GAMMA Investing LLC | 299 | $5.23K | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 328 | $5.74K | 0.00% | +328 | New |
| US Bancorp | 337 | $5.90K | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 398 | $6.96K | 0.00% | +398 | New |
| Amalgamated Bank | 384 | $7.00K | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 700 | $12.3K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 960 | $17.0K | 0.00% | −338−26.0% | Reduced |
| Sterling Capital Management LLC | 1,058 | $18.5K | 0.00% | +598+130.0% | Added |
| California State Teachers Retirement System | 1,065 | $18.6K | 0.00% | +1+0.1% | Added |
| Ameritas Investment Partners, Inc. | 1,177 | $20.6K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 1,267 | $22.2K | 0.00% | −843−40.0% | Reduced |
| Legal & General Group Plc | 1,328 | $23.2K | 0.00% | −223−14.4% | Reduced |
| CWM, LLC | 1,384 | $24.0K | 0.00% | −418−23.2% | Reduced |
| Russell Investments Group, Ltd. | 1,481 | $25.9K | 0.00% | +1,446+4,131.4% | Added |
| FNY Investment Advisers, LLC | 1,575 | $27.0K | 0.01% | +1,575 | New |
| Nisa Investment Advisors, LLC | 1,592 | $27.9K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 2,896 | $50.7K | 0.00% | +1,567+117.9% | Added |
| Rockefeller Capital Management L.P. | 3,000 | $52.5K | 0.00% | −31,135−91.2% | Reduced |
| New York State Common Retirement Fund | 4,300 | $75.3K | 0.00% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 4,509 | $78.9K | 0.00% | +2,366+110.4% | Added |
| Acadian Asset Management LLC | 5,009 | $86.0K | 0.00% | +5,009 | New |
| China Universal Asset Management Co., Ltd. | 5,000 | $87.5K | 0.01% | +5,000 | New |
| JPMorgan Chase & Co | 6,175 | $108.1K | 0.00% | −2,009−24.5% | Reduced |
| Quarry LP | 6,499 | $113.7K | 0.03% | −1,501−18.8% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 7,120 | $124.6K | 0.00% | −2,209−23.7% | Reduced |
| Symmetry Investments LP | 10,000 | $175.0K | 0.01% | +10,000 | New |
| Man Group plc | 10,225 | $178.9K | 0.00% | +10,225 | New |
| Alliancebernstein L.P. | 10,500 | $183.8K | 0.00% | 00.0% | Unchanged |
| Virtus Investment Advisers, Inc. | 10,614 | $185.7K | 0.05% | +1,842+21.0% | Added |
| Deutsche Bank AG | 10,923 | $191.2K | 0.00% | +2,161+24.7% | Added |
| MetLife Investment Management | 11,018 | $192.8K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 11,755 | $205.7K | 0.00% | +812+7.4% | Added |
| Invesco Ltd. | 11,788 | $206.3K | 0.00% | +11,788 | New |
| Two Sigma Investments, LP | 13,587 | $237.8K | 0.00% | +13,587 | New |
| Bridgeway Capital Management, LLC | 14,200 | $248.5K | 0.01% | −15,000−51.4% | Reduced |
| Silverarc Capital Management, LLC | 15,000 | $262.5K | 0.04% | +15,000 | New |
| Walleye Capital LLC | 15,176 | $265.6K | 0.00% | −55,157−78.4% | Reduced |
| AQR Capital Management LLC | 15,764 | $275.9K | 0.00% | −2,237−12.4% | Reduced |
| Alps Advisors Inc | 16,840 | $294.7K | 0.00% | −1,208−6.7% | Reduced |
| Caption Management, LLC | 20,000 | $350.0K | 0.02% | +20,000 | New |
| Barclays PLC | 21,626 | $378.5K | 0.00% | −36,915−63.1% | Reduced |
| Rhumbline Advisers | 21,821 | $381.9K | 0.00% | −1,841−7.8% | Reduced |
| Nuveen, LLC | 22,143 | $387.5K | 0.00% | 00.0% | Unchanged |
| Balyasny Asset Management LLC | 25,641 | $448.7K | 0.00% | +25,641 | New |
| Bank of America Corp | 26,616 | $465.8K | 0.00% | −15,771−37.2% | Reduced |
| Koa Wealth Management, LLC | 26,713 | $467.5K | 0.35% | −5,039−15.9% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 28,461 | $498.1K | 0.00% | +28,461 | New |
| Creative Planning | 28,732 | $502.8K | 0.00% | +28,732 | New |
| SummitTX Capital, L.P. | 29,310 | $512.9K | 0.02% | +29,310 | New |
| Weiss Asset Management LP | 30,823 | $539.4K | 0.01% | +30,823 | New |
| Ghisallo Capital Management LLC | 38,250 | $669.4K | 0.02% | +38,250 | New |
| XTX Topco Ltd | 38,378 | $671.6K | 0.03% | +26,517+223.6% | Added |
| Readystate Asset Management LP | 38,500 | $673.8K | 0.03% | +38,500 | New |
| Boothbay Fund Management, LLC | 39,498 | $691.2K | 0.02% | +39,498 | New |
| Morgan Stanley | 44,868 | $785.2K | 0.00% | +20,860+86.9% | Added |
| Bank of New York Mellon Corp | 47,735 | $835.4K | 0.00% | +9,703+25.5% | Added |
| Ikarian Capital, LLC | 48,071 | $841.2K | 0.19% | +48,071 | New |
| Aaron Wealth Advisors | 50,000 | $875.0K | 0.05% | 00.0% | Unchanged |
| Exome Asset Management LLC | 52,402 | $917.0K | 0.61% | −10,674−16.9% | Reduced |
| UBS Group AG | 60,725 | $1.06M | 0.00% | +29,758+96.1% | Added |
| Manufacturers Life Insurance Company, The | 68,376 | $1.20M | 0.00% | −18,721−21.5% | Reduced |
| FMR LLC | 68,976 | $1.21M | 0.00% | +7,643+12.5% | Added |
| Platinum Investment Management Ltd | 69,428 | $1.21M | 0.08% | −43,315−38.4% | Reduced |
| StemPoint Capital LP | 75,000 | $1.31M | 0.26% | −66,021−46.8% | Reduced |
| Murchinson Ltd. | 80,000 | $1.40M | 0.27% | +80,000 | New |
| DAFNA Capital Management LLC | 85,000 | $1.49M | 0.37% | +85,000 | New |
| Hudson Bay Capital Management LP | 85,000 | $1.49M | 0.01% | +85,000 | New |
| Schroder Investment Management Group | 83,766 | $1.50M | 0.00% | +83,766 | New |
| ExodusPoint Capital Management, LP | 100,000 | $1.75M | 0.02% | +100,000 | New |
| Burkehill Global Management, LP | 100,000 | $1.75M | 0.10% | +100,000 | New |
| TD Asset Management Inc | 118,792 | $2.08M | 0.00% | −52,512−30.7% | Reduced |
| Northern Trust Corp | 133,265 | $2.33M | 0.00% | +17,671+15.3% | Added |
| Affinity Asset Advisors, LLC | 165,000 | $2.89M | 0.27% | +165,000 | New |
| Charles Schwab Investment Management Inc | 170,006 | $2.98M | 0.00% | +62,523+58.2% | Added |
| Polygon Management Ltd. | 177,840 | $3.11M | 0.45% | +177,840 | New |
| Sectoral Asset Management Inc | 194,898 | $3.41M | 2.11% | +3,073+1.6% | Added |
| PFM Health Sciences, LP | 221,505 | $3.88M | 0.33% | +221,505 | New |
| Longaeva Partners L.P. | 224,433 | $3.93M | 0.84% | +224,433 | New |
| Opaleye Management Inc. | 253,000 | $4.43M | 0.63% | +13,681+5.7% | Added |
| Soleus Capital Management, L.P. | 275,000 | $4.81M | 0.26% | +275,000 | New |
| Baker Bros. Advisors LP | 277,777 | $4.86M | 0.04% | +277,777 | New |
| Rock Springs Capital Management LP | 282,624 | $4.95M | 0.29% | +282,624 | New |
| Schonfeld Strategic Advisors LLC | 282,677 | $4.95M | 0.03% | −348,736−55.2% | Reduced |
| State Street Corp | 319,274 | $5.59M | 0.00% | +54,155+20.4% | Added |
| Goldman Sachs Group Inc | 358,121 | $6.27M | 0.00% | +358,121 | New |
| Geode Capital Management, LLC | 473,932 | $8.30M | 0.00% | +125,485+36.0% | Added |
| Point72 Asset Management, L.P. | 627,667 | $11.0M | 0.02% | −346,120−35.5% | Reduced |
| TCG Crossover Management, LLC | 650,000 | $11.4M | 0.56% | 00.0% | Unchanged |