MBX Biosciences, Inc. Common Stock (MBX) ownership: Top institutional holder: Frazier Life Sciences Management, L.P. ($198.56M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| Frazier Life Sciences Management, L.P. | 6652013.00 | $198.56M | 2026-03-31 |
| ORBIMED ADVISORS LLC | 3637887.00 | $108.59M | 2026-03-31 |
| NEA Management Company, LLC | 3614486.00 | $107.89M | 2026-03-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 3191824.00 | $95.28M | 2026-03-31 |
| BlackRock, Inc. | 2941406.00 | $87.80M | 2026-03-31 |
| FMR LLC | 2936684.00 | $87.66M | 2026-03-31 |
| Deep Track Capital, LP | 2757569.00 | $82.31M | 2026-03-31 |
| NVP ASSOCIATES, LLC | 2136335.00 | $63.77M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-06 | |
| Sell | null | 2026-05-06 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.