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
- +2.46M (+4.6%) vs. Q1 2026
- Total value
- $3.06B
- +$1.48B (+93.5%) 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 | $1.58B |
| Q4 2025 | 138 | $1.53B |
| Q3 2025 | 118 | $836.5M |
| Q2 2025 | 88 | $420.7M |
| 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 |
|---|---|---|---|---|---|
| Frazier Life Sciences Management, L.P. | 6,652,013 | $367.2M | 8.00% | 00.0% | Unchanged |
| FMR LLC | 5,322,885 | $293.8M | 0.01% | +2,386,201+81.3% | Added |
| Wellington Management Group LLP | 4,977,523 | $274.8M | 0.05% | +1,785,699+55.9% | Added |
| NEA Management Company, LLC | 3,614,486 | $199.5M | 12.56% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 3,428,736 | $189.3M | 3.58% | −209,151−5.7% | Reduced |
| BlackRock, Inc. | 3,323,672 | $183.5M | 0.00% | +382,266+13.0% | Added |
| Paradigm Biocapital Advisors LP | 2,508,015 | $138.4M | 2.59% | +2,508,015 | New |
| NVP Associates, LLC | 2,136,335 | $117.9M | 35.93% | 00.0% | Unchanged |
| Deep Track Capital, LP | 1,732,569 | $95.6M | 1.41% | −1,025,000−37.2% | Reduced |
| Polar Capital Holdings Plc | 1,608,514 | $88.8M | 0.25% | −13,672−0.8% | Reduced |
| Vanguard Capital Management LLC | 1,477,388 | $81.6M | 0.00% | −2040.0% | Reduced |
| Aaron Wealth Advisors | 1,167,799 | $64.5M | 3.27% | −3770.0% | Reduced |
| Driehaus Capital Management LLC | 1,056,579 | $58.3M | 0.34% | +38,367+3.8% | Added |
| Kynam Capital Management, LP | 934,799 | $51.6M | 2.85% | 00.0% | Unchanged |
| Woodline Partners LP | 900,092 | $49.7M | 0.15% | +290.0% | Added |
| Eventide Asset Management, LLC | 873,492 | $48.2M | 0.64% | −16,508−1.9% | Reduced |
| State Street Corp | 864,466 | $47.7M | 0.00% | +77,258+9.8% | Added |
| Price T Rowe Associates Inc | 814,807 | $45.0M | 0.00% | −214,200−20.8% | Reduced |
| Parkman Healthcare Partners LLC | 800,173 | $44.2M | 4.54% | +1360.0% | Added |
| Geode Capital Management, LLC | 773,072 | $42.7M | 0.00% | +102,687+15.3% | Added |
| Braidwell LP | 710,880 | $39.2M | 1.45% | −781,587−52.4% | Reduced |
| TCG Crossover Management, LLC | 650,000 | $35.9M | 0.86% | 00.0% | Unchanged |
| Cormorant Asset Management, LP | 550,000 | $30.4M | 1.56% | −570,000−50.9% | Reduced |
| Soleus Capital Management, L.P. | 515,279 | $28.4M | 0.98% | +336,382+188.0% | Added |
| Goldman Sachs Group Inc | 459,005 | $25.3M | 0.00% | +1,060+0.2% | Added |
| Marshall Wace, LLP | 401,885 | $22.2M | 0.02% | +339,182+540.9% | Added |
| EcoR1 Capital, LLC | 388,500 | $21.4M | 1.06% | −388,500−50.0% | Reduced |
| Vanguard Portfolio Management LLC | 346,717 | $19.1M | 0.00% | +53,422+18.2% | Added |
| Bank of America Corp | 298,927 | $16.5M | 0.00% | +270,177+939.7% | Added |
| Rock Springs Capital Management LP | 298,218 | $16.5M | 0.80% | +10,251+3.6% | Added |
| Candriam Luxembourg S.C.A. | 289,893 | $16.0M | 0.07% | −4,481−1.5% | Reduced |
| UBS Group AG | 272,747 | $15.1M | 0.00% | −74,167−21.4% | Reduced |
| Opaleye Management Inc. | 260,000 | $14.4M | 1.30% | 00.0% | Unchanged |
| Franklin Resources Inc | 252,665 | $13.9M | 0.00% | +252,665 | New |
| Schonfeld Strategic Advisors LLC | 248,670 | $13.7M | 0.07% | +124,856+100.8% | Added |
| Morgan Stanley | 248,558 | $13.7M | 0.00% | +216,996+687.5% | Added |
| Northern Trust Corp | 246,678 | $13.6M | 0.00% | +36,103+17.1% | Added |
| Dimensional Fund Advisors LP | 233,700 | $12.9M | 0.00% | +186,947+399.9% | Added |
| Charles Schwab Investment Management Inc | 233,095 | $12.9M | 0.00% | +18,187+8.5% | Added |
| Millennium Management LLC | 226,151 | $12.5M | 0.01% | −338,264−59.9% | Reduced |
| Polygon Management Ltd. | 203,543 | $11.2M | 1.83% | +58,063+39.9% | Added |
| Vanguard Fiduciary Trust Co | 201,429 | $11.1M | 0.00% | +31,275+18.4% | Added |
| Caligan Partners LP | 200,000 | $11.0M | 0.53% | −648,590−76.4% | Reduced |
| D. E. Shaw & Co., Inc. | 182,767 | $10.1M | 0.01% | −106,122−36.7% | Reduced |
| JPMorgan Chase & Co | 139,611 | $7.52M | 0.00% | −7,446−5.1% | Reduced |
| KVP Capital Advisors, LP | 121,524 | $6.71M | 4.92% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 113,475 | $6.26M | 0.00% | −1,600−1.4% | Reduced |
| Burkehill Global Management, LP | 100,000 | $5.52M | 0.20% | 00.0% | Unchanged |
| Nuveen, LLC | 98,733 | $5.45M | 0.00% | +16,941+20.7% | Added |
| TD Asset Management Inc | 95,598 | $5.28M | 0.00% | −20,400−17.6% | Reduced |
| Elmind Capital, LP | 91,000 | $5.02M | 1.26% | −120,000−56.9% | Reduced |
| Bank of New York Mellon Corp | 88,927 | $4.91M | 0.00% | +8,705+10.9% | Added |
| Prudential Financial Inc | 88,045 | $4.86M | 0.01% | +88,045 | New |
| Barclays PLC | 87,854 | $4.85M | 0.00% | +76,016+642.1% | Added |
| Affinity Asset Advisors, LLC | 75,000 | $4.14M | 0.20% | −75,000−50.0% | Reduced |
| PFM Health Sciences, LP | 70,971 | $3.92M | 0.34% | −923−1.3% | Reduced |
| Boothbay Fund Management, LLC | 70,353 | $3.88M | 0.07% | −137,696−66.2% | Reduced |
| Manufacturers Life Insurance Company, The | 66,112 | $3.65M | 0.00% | −24,522−27.1% | Reduced |
| Moore Capital Management, LP | 64,893 | $3.58M | 0.08% | +64,893 | New |
| Rhenman & Partners Asset Management AB | 62,000 | $3.42M | 0.32% | +62,000 | New |
| Invesco Ltd. | 50,678 | $2.80M | 0.00% | +23,153+84.1% | Added |
| Alps Advisors Inc | 48,012 | $2.65M | 0.01% | +11,462+31.4% | Added |
| Platinum Investment Management Ltd | 43,597 | $2.41M | 0.59% | 00.0% | Unchanged |
| Swiss National Bank | 42,900 | $2.37M | 0.00% | −1,500−3.4% | Reduced |
| Ensign Peak Advisors, Inc | 42,156 | $2.33M | 0.00% | +42,156 | New |
| Algert Global LLC | 42,070 | $2.32M | 0.03% | +6,050+16.8% | Added |
| Creative Planning | 39,524 | $2.18M | 0.00% | +3,554+9.9% | Added |
| Rhumbline Advisers | 37,196 | $2.05M | 0.00% | +3,325+9.8% | Added |
| Deutsche Bank AG | 31,693 | $1.75M | 0.00% | +8,743+38.1% | Added |
| Wells Fargo & Company | 28,313 | $1.56M | 0.00% | +17,551+163.1% | Added |
| Exchange Traded Concepts, LLC | 27,421 | $1.51M | 0.01% | −6,843−20.0% | Reduced |
| Susquehanna International Group, LLP | 26,684 | $1.47M | 0.00% | +17,197+181.3% | Added |
| Voya Investment Management LLC | 26,132 | $1.44M | 0.00% | +26,132 | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 25,800 | $1.42M | 0.00% | +25,800 | New |
| Teachers Retirement System of the State of Kentucky | 25,377 | $1.40M | 0.01% | +25,377 | New |
| Citigroup Inc | 25,122 | $1.39M | 0.00% | +11,623+86.1% | Added |
| California State Teachers Retirement System | 23,376 | $1.29M | 0.00% | +611+2.7% | Added |
| American Century Companies Inc | 22,680 | $1.25M | 0.00% | +13,954+159.9% | Added |
| AQR Capital Management LLC | 22,591 | $1.25M | 0.00% | −4,796−17.5% | Reduced |
| Legal & General Group Plc | 21,583 | $1.19M | 0.00% | +2,225+11.5% | Added |
| UBS Asset Management Americas Inc | 21,344 | $1.18M | 0.00% | +14,106+194.9% | Added |
| Cerity Partners LLC | 20,997 | $1.16M | 0.00% | −166−0.8% | Reduced |
| Vanguard Global Advisers, LLC | 18,969 | $1.05M | 0.00% | +2,941+18.3% | Added |
| MetLife Investment Management | 18,250 | $1.01M | 0.00% | +2,232+13.9% | Added |
| Russell Investments Group, Ltd. | 18,162 | $1.00M | 0.00% | +14,306+371.0% | Added |
| Koa Wealth Management, LLC | 17,113 | $944.6K | 0.64% | −800−4.5% | Reduced |
| Alliancebernstein L.P. | 31,000 | $925.4K | 0.00% | +500+1.6% | Added |
| State of Wisconsin Investment Board | 15,971 | $881.6K | 0.00% | −3,291−17.1% | Reduced |
| Vanguard Asset Management, Ltd | 14,752 | $814.3K | 0.00% | 00.0% | Unchanged |
| Optimize Financial Inc | 14,458 | $798.1K | 0.29% | −50−0.3% | Reduced |
| Sound Capital Solutions LLC | 14,458 | $798.1K | 0.19% | +14,458 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 14,292 | $788.9K | 0.00% | +967+7.3% | Added |
| DAFNA Capital Management LLC | 11,809 | $651.9K | 0.12% | −163,656−93.3% | Reduced |
| HighVista Strategies LLC | 11,634 | $642.2K | 0.15% | +162+1.4% | Added |
| New York State Common Retirement Fund | 11,000 | $607.2K | 0.00% | +2,000+22.2% | Added |
| Jupiter Topco LLC | 10,300 | $568.3K | 0.00% | +10,300 | New |
| Fred Alger Management, LLC | 9,877 | $545.2K | 0.00% | +9,877 | New |
| BNP Paribas Arbitrage, SA | 9,860 | $544.3K | 0.00% | −524−5.0% | Reduced |
| State Board of Administration of Florida Retirement System | 9,777 | $539.7K | 0.00% | +9,777 | New |
| Virtus Investment Advisers, Inc. | 9,215 | $508.7K | 0.12% | +84+0.9% | Added |