Who owns MBX
157 institutions reported holding MBX for 2026Q1, together 113% of the company, more than the 137 a quarter earlier.
157
Institutions reporting a position · as of 2026Q1 · up from 137 the quarter before
- Shares held by institutions
- 52.5M
Shares held by institutions · 113% of the company · long US equity positions only, as reported on Form 13F
- Reported value
- $1.57B
Reported value · at 2026-03-31 prices, not today's
- Opened vs closed
- 33 / 19
Opened vs closed · new positions against positions exited in the latest quarter
Details›
- Reporting quarter2026-03-31
- 2026Q1
- Quarters on record
- 7
- New positions
- 33
- Positions exited
- 19
- Added to
- 43
- Reduced
- 46
| Quarter | Filers | Shares | Reported value |
|---|---|---|---|
| 2026Q1 | 157 | 52.5M | $1.57B |
| 2025Q4 | 137 | 48.4M | $1.53B |
| 2025Q3 | 117 | 47.8M | $836M |
| 2025Q2 | 88 | 36.8M | $420M |
| 2025Q1 | 79 | 35.7M | $263M |
| 2024Q4 | 63 | 32.9M | $606M |
| 2024Q3 | 44 | 30.3M | $784M |
| Holder | Shares | % of company | Value |
|---|---|---|---|
| Frazier Life Sciences Management, L.P. | 6.7M | n/a | $199M |
| ORBIMED ADVISORS LLC | 3.6M | n/a | $109M |
| NEA Management Company, LLC | 3.6M | n/a | $108M |
| WELLINGTON MANAGEMENT GROUP LLP | 3.2M | n/a | $95M |
| BlackRock Inc. | 2.9M | n/a | $88M |
| FMR LLC | 2.9M | n/a | $88M |
| Deep Track Capital, LP | 2.8M | n/a | $82M |
| NVP ASSOCIATES, LLC | 2.1M | n/a | $64M |
| VANGUARD GROUP INC | 2.0M | n/a | $59M |
| Polar Capital Holdings Plc | 1.6M | n/a | $48M |
SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold.
reading the register…