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, Q2 2026
Institutional positions in MBX Biosciences, Inc. as of Jun 30, 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
- 172
- +17 vs. Q1 2026
- Shares held
- 55.5M
- +2.95M (+5.6%) vs. Q1 2026
- Total value
- $3.06B
- +$1.49B (+95.3%) vs. Q1 2026
- New holders
- 38
- 64 more added
- Sold out
- 21
- 49 more reduced
2 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding MBX Biosciences, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Susquehanna International Group, LLP | 26,684 | $1.47M | 0.00% | +17,197+181.3% | Added |
| Exchange Traded Concepts, LLC | 27,421 | $1.51M | 0.01% | −6,843−20.0% | Reduced |
| Wells Fargo & Company | 28,313 | $1.56M | 0.00% | +17,551+163.1% | Added |
| Deutsche Bank AG | 31,693 | $1.75M | 0.00% | +8,743+38.1% | Added |
| Rhumbline Advisers | 37,196 | $2.05M | 0.00% | +3,325+9.8% | Added |
| Creative Planning | 39,524 | $2.18M | 0.00% | +3,554+9.9% | Added |
| Algert Global LLC | 42,070 | $2.32M | 0.03% | +6,050+16.8% | Added |
| Ensign Peak Advisors, Inc | 42,156 | $2.33M | 0.00% | +42,156 | New |
| Swiss National Bank | 42,900 | $2.37M | 0.00% | −1,500−3.4% | Reduced |
| Platinum Investment Management Ltd | 43,597 | $2.41M | 0.59% | 00.0% | Unchanged |
| Alps Advisors Inc | 48,012 | $2.65M | 0.01% | +11,462+31.4% | Added |
| Invesco Ltd. | 50,678 | $2.80M | 0.00% | +23,153+84.1% | Added |
| Rhenman & Partners Asset Management AB | 62,000 | $3.42M | 0.32% | +62,000 | New |
| Moore Capital Management, LP | 64,893 | $3.58M | 0.08% | +64,893 | New |
| Manufacturers Life Insurance Company, The | 66,112 | $3.65M | 0.00% | −24,522−27.1% | Reduced |
| Boothbay Fund Management, LLC | 70,353 | $3.88M | 0.07% | −137,696−66.2% | Reduced |
| PFM Health Sciences, LP | 70,971 | $3.92M | 0.34% | −923−1.3% | Reduced |
| Affinity Asset Advisors, LLC | 75,000 | $4.14M | 0.20% | −75,000−50.0% | Reduced |
| Barclays PLC | 87,854 | $4.85M | 0.00% | +76,016+642.1% | Added |
| Prudential Financial Inc | 88,045 | $4.86M | 0.01% | +88,045 | New |
| Bank of New York Mellon Corp | 88,927 | $4.91M | 0.00% | +8,705+10.9% | Added |
| Elmind Capital, LP | 91,000 | $5.02M | 1.26% | −120,000−56.9% | Reduced |
| TD Asset Management Inc | 95,598 | $5.28M | 0.00% | −20,400−17.6% | Reduced |
| Nuveen, LLC | 98,733 | $5.45M | 0.00% | +16,941+20.7% | Added |
| Burkehill Global Management, LP | 100,000 | $5.52M | 0.20% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 113,475 | $6.26M | 0.00% | −1,600−1.4% | Reduced |
| KVP Capital Advisors, LP | 121,524 | $6.71M | 4.92% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 139,611 | $7.52M | 0.00% | −7,446−5.1% | Reduced |
| D. E. Shaw & Co., Inc. | 182,767 | $10.1M | 0.01% | −106,122−36.7% | Reduced |
| Caligan Partners LP | 200,000 | $11.0M | 0.53% | −648,590−76.4% | Reduced |
| Vanguard Fiduciary Trust Co | 201,429 | $11.1M | 0.00% | +31,275+18.4% | Added |
| Polygon Management Ltd. | 203,543 | $11.2M | 1.83% | +58,063+39.9% | Added |
| Millennium Management LLC | 226,151 | $12.5M | 0.01% | −338,264−59.9% | Reduced |
| Charles Schwab Investment Management Inc | 233,095 | $12.9M | 0.00% | +18,187+8.5% | Added |
| Dimensional Fund Advisors LP | 233,700 | $12.9M | 0.00% | +186,947+399.9% | Added |
| Northern Trust Corp | 246,678 | $13.6M | 0.00% | +36,103+17.1% | Added |
| Morgan Stanley | 248,558 | $13.7M | 0.00% | +216,996+687.5% | Added |
| Schonfeld Strategic Advisors LLC | 248,670 | $13.7M | 0.07% | +124,856+100.8% | Added |
| Franklin Resources Inc | 252,665 | $13.9M | 0.00% | +252,665 | New |
| Opaleye Management Inc. | 260,000 | $14.4M | 1.30% | 00.0% | Unchanged |
| UBS Group AG | 272,747 | $15.1M | 0.00% | −74,167−21.4% | Reduced |
| Candriam Luxembourg S.C.A. | 289,893 | $16.0M | 0.07% | −4,481−1.5% | Reduced |
| Rock Springs Capital Management LP | 298,218 | $16.5M | 0.80% | +10,251+3.6% | Added |
| Bank of America Corp | 298,927 | $16.5M | 0.00% | +270,177+939.7% | Added |
| Vanguard Portfolio Management LLC | 346,717 | $19.1M | 0.00% | +53,422+18.2% | Added |
| EcoR1 Capital, LLC | 388,500 | $21.4M | 1.06% | −388,500−50.0% | Reduced |
| Marshall Wace, LLP | 401,885 | $22.2M | 0.02% | +339,182+540.9% | Added |
| Goldman Sachs Group Inc | 459,005 | $25.3M | 0.00% | +1,060+0.2% | Added |
| Soleus Capital Management, L.P. | 515,279 | $28.4M | 0.98% | +336,382+188.0% | Added |
| Cormorant Asset Management, LP | 550,000 | $30.4M | 1.56% | −570,000−50.9% | Reduced |
| TCG Crossover Management, LLC | 650,000 | $35.9M | 0.86% | 00.0% | Unchanged |
| Braidwell LP | 710,880 | $39.2M | 1.45% | −781,587−52.4% | Reduced |
| Geode Capital Management, LLC | 773,072 | $42.7M | 0.00% | +102,687+15.3% | Added |
| Parkman Healthcare Partners LLC | 800,173 | $44.2M | 4.54% | +1360.0% | Added |
| Price T Rowe Associates Inc | 814,807 | $45.0M | 0.00% | −214,200−20.8% | Reduced |
| State Street Corp | 864,466 | $47.7M | 0.00% | +77,258+9.8% | Added |
| Eventide Asset Management, LLC | 873,492 | $48.2M | 0.64% | −16,508−1.9% | Reduced |
| Woodline Partners LP | 900,092 | $49.7M | 0.15% | +290.0% | Added |
| Kynam Capital Management, LP | 934,799 | $51.6M | 2.85% | 00.0% | Unchanged |
| Driehaus Capital Management LLC | 1,056,579 | $58.3M | 0.34% | +38,367+3.8% | Added |
| Aaron Wealth Advisors | 1,167,799 | $64.5M | 3.27% | −3770.0% | Reduced |
| Vanguard Capital Management LLC | 1,477,388 | $81.6M | 0.00% | −2040.0% | Reduced |
| Polar Capital Holdings Plc | 1,608,514 | $88.8M | 0.25% | −13,672−0.8% | Reduced |
| Deep Track Capital, LP | 1,732,569 | $95.6M | 1.41% | −1,025,000−37.2% | Reduced |
| NVP Associates, LLC | 2,136,335 | $117.9M | 35.93% | 00.0% | Unchanged |
| Paradigm Biocapital Advisors LP | 2,508,015 | $138.4M | 2.59% | +2,508,015 | New |
| BlackRock, Inc. | 3,323,672 | $183.5M | 0.00% | +382,266+13.0% | Added |
| OrbiMed Advisors LLC | 3,428,736 | $189.3M | 3.58% | −209,151−5.7% | Reduced |
| NEA Management Company, LLC | 3,614,486 | $199.5M | 12.56% | 00.0% | Unchanged |
| Wellington Management Group LLP | 4,977,523 | $274.8M | 0.05% | +1,785,699+55.9% | Added |
| FMR LLC | 5,322,885 | $293.8M | 0.01% | +2,386,201+81.3% | Added |
| Frazier Life Sciences Management, L.P. | 6,652,013 | $367.2M | 8.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −932,833−100.0% | Sold out |
| StemPoint Capital LP | 0 | $0 | 0.00% | −499,469−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −97,215−100.0% | Sold out |
| Victory Capital Management Inc | 0 | $0 | 0.00% | −71,028−100.0% | Sold out |
| Schroder Investment Management Group | 0 | $0 | 0.00% | −57,322−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −28,087−100.0% | Sold out |
| Swiss Life Asset Management Ltd | 0 | $0 | 0.00% | −12,130−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −17,380−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −17,187−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −12,700−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −10,222−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −10,155−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −8,823−100.0% | Sold out |
| Brinker Capital Investments, LLC | 0 | $0 | 0.00% | −7,951−100.0% | Sold out |
| Bridgeway Capital Management, LLC | 0 | $0 | 0.00% | −7,500−100.0% | Sold out |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −5,600−100.0% | Sold out |
| Cygnus Capital Advisors, LLC | 0 | $0 | 0.00% | −1,800−100.0% | Sold out |
| Versant Capital Management, Inc | 0 | $0 | 0.00% | −24−100.0% | Sold out |
| MAI Capital Management | 0 | $0 | 0.00% | −7−100.0% | Sold out |
| True Wealth Design, LLC | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Janus Henderson Group PLC | – | – | – | – | Not filed |
| CWM, LLC | – | – | – | – | Not filed |