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, Q1 2026
Institutional positions in MBX Biosciences, Inc. as of Mar 31, 2026. 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
- 157
- +21 vs. Q4 2025
- Shares held
- 52.5M
- +5.92M (+12.7%) vs. Q4 2025
- Total value
- $1.57B
- +$98.0M (+6.7%) vs. Q4 2025
- New holders
- 39
- 43 more added
- Sold out
- 18
- 47 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding MBX Biosciences, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Covestor Ltd | 3 | $0 | 0.00% | +3 | New |
| IFP Advisors, Inc | 1 | $30 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 2 | $60 | 0.00% | 00.0% | Unchanged |
| MAI Capital Management | 7 | $209 | 0.00% | +7 | New |
| Farther Finance Advisors, LLC | 9 | $291 | 0.00% | −1−10.0% | Reduced |
| Essential Partners LLC | 15 | $448 | 0.00% | 00.0% | Unchanged |
| Keating Financial Advisory Services, Inc. | 16 | $478 | 0.00% | +16 | New |
| Fortitude Family Office, LLC | 19 | $567 | 0.00% | +19 | New |
| Rothschild Investment LLC | 24 | $716 | 0.00% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 24 | $716 | 0.00% | +24 | New |
| EverSource Wealth Advisors, LLC | 25 | $746 | 0.00% | 00.0% | Unchanged |
| Cornerstone Financial Management LLC | 34 | $1.01K | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 49 | $1.46K | 0.00% | +49 | New |
| Parallel Advisors, LLC | 61 | $1.82K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 70 | $2.09K | 0.00% | +18+34.6% | Added |
| Jones Financial Companies LLLP | 80 | $2.28K | 0.00% | 00.0% | Unchanged |
| UMA Financial Services, Inc. | 109 | $3.25K | 0.00% | 00.0% | Unchanged |
| FIL Ltd | 178 | $5.31K | 0.00% | +178 | New |
| Signaturefd, LLC | 179 | $5.34K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 207 | $6.18K | 0.00% | +11+5.6% | Added |
| Advisor Group Holdings, Inc. | 269 | $8.03K | 0.00% | −77,332−99.7% | Reduced |
| US Bancorp | 284 | $8.48K | 0.00% | −28−9.0% | Reduced |
| GAMMA Investing LLC | 299 | $8.93K | 0.00% | 00.0% | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 470 | $14.0K | 0.00% | +470 | New |
| Royal Bank of Canada | 751 | $22.0K | 0.00% | −781−51.0% | Reduced |
| KBC Group NV | 810 | $24.0K | 0.00% | +810 | New |
| Sterling Capital Management LLC | 949 | $28.3K | 0.00% | −692−42.2% | Reduced |
| GF Fund Management Co. Ltd. | 1,009 | $30.1K | 0.00% | +127+14.4% | Added |
| Simplex Trading, LLC | 1,307 | $39.0K | 0.00% | −7,618−85.4% | Reduced |
| Tower Research Capital LLC (TRC) | 1,411 | $42.1K | 0.00% | −2,005−58.7% | Reduced |
| Nisa Investment Advisors, LLC | 1,592 | $47.5K | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 1,600 | $47.8K | 0.00% | +900+128.6% | Added |
| CWM, LLC | 1,772 | $52.9K | 0.00% | −12−0.7% | Reduced |
| Cygnus Capital Advisors, LLC | 1,800 | $54.0K | 0.04% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 2,312 | $69.0K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 2,342 | $69.9K | 0.00% | +160+7.3% | Added |
| Rockefeller Capital Management L.P. | 3,224 | $96.2K | 0.00% | +224+7.5% | Added |
| SG Americas Securities, LLC | 3,386 | $101.0K | 0.00% | −1,379−28.9% | Reduced |
| Russell Investments Group, Ltd. | 3,856 | $115.1K | 0.00% | +1,000+35.0% | Added |
| KLP Kapitalforvaltning AS | 4,900 | $146.3K | 0.00% | +4,900 | New |
| Los Angeles Capital Management LLC | 5,600 | $167.2K | 0.00% | −4,760−45.9% | Reduced |
| Vanguard Investments Australia, Ltd. | 6,103 | $182.2K | 0.00% | +6,103 | New |
| Group One Trading, L.P. | 6,251 | $186.6K | 0.01% | −3,177−33.7% | Reduced |
| Intech Investment Management LLC | 6,844 | $204.3K | 0.00% | −14−0.2% | Reduced |
| UBS Asset Management Americas Inc | 7,238 | $216.1K | 0.00% | +7,138+7,138.0% | Added |
| Bridgeway Capital Management, LLC | 7,500 | $223.9K | 0.00% | −2,500−25.0% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 7,520 | $224.5K | 0.00% | 00.0% | Unchanged |
| State of New Jersey Common Pension Fund D | 7,673 | $229.0K | 0.00% | +7,673 | New |
| Brinker Capital Investments, LLC | 7,951 | $237.3K | 0.00% | +7,951 | New |
| China Universal Asset Management Co., Ltd. | 7,968 | $237.8K | 0.02% | −7,349−48.0% | Reduced |
| Profund Advisors LLC | 8,388 | $250.4K | 0.01% | −826−9.0% | Reduced |
| American Century Companies Inc | 8,726 | $260.5K | 0.00% | −3,510−28.7% | Reduced |
| Acadian Asset Management LLC | 8,823 | $262.0K | 0.00% | −39,791−81.9% | Reduced |
| Toroso Investments, LLC | 8,877 | $265.0K | 0.00% | +8,877 | New |
| Tema ETFs LLC | 8,877 | $265.0K | 0.02% | +8,877 | New |
| SEI Investments Co | 8,989 | $268.3K | 0.00% | +1,332+17.4% | Added |
| New York State Common Retirement Fund | 9,000 | $268.6K | 0.00% | +4,700+109.3% | Added |
| ACT Capital Management, LLC | 9,000 | $268.6K | 0.21% | +9,000 | New |
| Virtus Investment Advisers, Inc. | 9,131 | $272.6K | 0.08% | +221+2.5% | Added |
| Susquehanna International Group, LLP | 9,487 | $283.2K | 0.00% | −67,041−87.6% | Reduced |
| Aquatic Capital Management LLC | 10,155 | $303.1K | 0.01% | +10,155 | New |
| Verition Fund Management LLC | 10,222 | $305.1K | 0.00% | −47,353−82.2% | Reduced |
| Janus Henderson Group PLC | 10,300 | $308.2K | 0.00% | +10,300 | New |
| BNP Paribas Arbitrage, SA | 10,384 | $310.0K | 0.00% | +3,600+53.1% | Added |
| Wells Fargo & Company | 10,762 | $321.2K | 0.00% | −21,169−66.3% | Reduced |
| Canada Pension Plan Investment Board | 10,900 | $325.4K | 0.00% | −700−6.0% | Reduced |
| HighVista Strategies LLC | 11,472 | $342.4K | 0.09% | +11,472 | New |
| Barclays PLC | 11,838 | $353.4K | 0.00% | −40,853−77.5% | Reduced |
| Jump Financial, LLC | 12,700 | $379.1K | 0.01% | +12,700 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 13,325 | $397.8K | 0.00% | +67+0.5% | Added |
| Citigroup Inc | 13,499 | $402.9K | 0.00% | −2,892−17.6% | Reduced |
| Optimize Financial Inc | 14,508 | $433.1K | 0.21% | +14,508 | New |
| Vanguard Asset Management, Ltd | 14,752 | $440.3K | 0.00% | +14,752 | New |
| MetLife Investment Management | 16,018 | $478.1K | 0.00% | 00.0% | Unchanged |
| Vanguard Global Advisers, LLC | 16,028 | $478.4K | 0.00% | +16,028 | New |
| Qube Research & Technologies Ltd | 17,187 | $513.0K | 0.00% | −6,026−26.0% | Reduced |
| Engineers Gate Manager LP | 17,380 | $518.8K | 0.01% | +17,380 | New |
| Koa Wealth Management, LLC | 17,913 | $534.7K | 0.39% | −500−2.7% | Reduced |
| State of Wisconsin Investment Board | 19,262 | $575.0K | 0.00% | +19,262 | New |
| Legal & General Group Plc | 19,358 | $577.8K | 0.00% | +16,819+662.4% | Added |
| Cerity Partners LLC | 21,163 | $631.7K | 0.00% | −160−0.8% | Reduced |
| Swiss Life Asset Management Ltd | 12,130 | $657.2K | 0.00% | +12,130 | New |
| California State Teachers Retirement System | 22,765 | $679.5K | 0.00% | +21,011+1,197.9% | Added |
| Deutsche Bank AG | 22,950 | $685.1K | 0.00% | +2,923+14.6% | Added |
| AQR Capital Management LLC | 27,387 | $817.5K | 0.00% | −4,022−12.8% | Reduced |
| Invesco Ltd. | 27,525 | $821.6K | 0.00% | +6,322+29.8% | Added |
| ExodusPoint Capital Management, LP | 28,087 | $838.4K | 0.01% | −28,918−50.7% | Reduced |
| Bank of America Corp | 28,750 | $858.2K | 0.00% | −9,144−24.1% | Reduced |
| Morgan Stanley | 31,562 | $942.1K | 0.00% | −27,464−46.5% | Reduced |
| Alliancebernstein L.P. | 30,500 | $962.0K | 0.00% | +2,600+9.3% | Added |
| Rhumbline Advisers | 33,871 | $1.01M | 0.00% | +451+1.3% | Added |
| Exchange Traded Concepts, LLC | 34,264 | $1.02M | 0.01% | +34,264 | New |
| Creative Planning | 35,970 | $1.07M | 0.00% | +2,319+6.9% | Added |
| Algert Global LLC | 36,020 | $1.08M | 0.02% | +36,020 | New |
| Alps Advisors Inc | 36,550 | $1.09M | 0.01% | −322−0.9% | Reduced |
| Platinum Investment Management Ltd | 43,597 | $1.30M | 0.33% | 00.0% | Unchanged |
| Swiss National Bank | 44,400 | $1.33M | 0.00% | +44,400 | New |
| Dimensional Fund Advisors LP | 46,753 | $1.40M | 0.00% | +46,753 | New |
| Schroder Investment Management Group | 57,322 | $1.54M | 0.00% | −16,414−22.3% | Reduced |
| XTX Topco Ltd | 53,210 | $1.59M | 0.03% | +33,071+164.2% | Added |