MBX Biosciences, Inc. (MBX)
Healthcare
Biotechnology
64.40 $
-2.3%
vs. previous close
Closing price · As of: 3. Aug 2026
Who owns MBX Biosciences, Inc. (MBX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 56.8% of the shares are freely tradable; institutional investors hold 111.5%.
Ownership Structure
Institutional ownership
Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
111.5%
Insiders
Share of the stock held by the executives, founders and major shareholders of the company itself.
2.7%
Float
Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
56.8%
Short % of float
Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
17.0%
Shares Outstanding
Total number of shares issued. Price times share count gives market cap.
48Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Frazier Life Sciences Management, L.P. | 13.98 | 6,652,013 | +0.0 | 03/31/2026 |
| Orbimed Advisors, LLC | 7.64 | 3,637,887 | -7.6 | 03/31/2026 |
| NEA Management Company, LLC | 7.59 | 3,614,486 | +0.0 | 03/31/2026 |
| Wellington Management Company LLP | 6.71 | 3,191,824 | -4.7 | 03/31/2026 |
| BlackRock Inc | 6.18 | 2,941,406 | +0.7 | 03/31/2026 |
| FMR Inc | 6.17 | 2,936,684 | +18,550.3 | 03/31/2026 |
| Deep Track Capital, LP | 5.79 | 2,757,569 | -15.1 | 03/31/2026 |
| NVP Associates LLC | 4.49 | 2,136,335 | +0.0 | 03/31/2026 |
| Polar Capital Holdings PLC | 3.41 | 1,622,186 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Polar Capital Biotech S Inc | 3.20 | 1,523,452 | +0.0 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: August 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.