EcoR1 Capital, LLC
- SEC CIK
- 0001587114
- Latest filing
- Aug 14, 2026
MBX holding history
MBX Biosciences, Inc. in every 13F filed by EcoR1 Capital, LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.
MBX overviewAll 13F holders of MBXFull Q2 2026 holdings
- Shares (Q2 2026)
- 388,500
- Value
- $21.4M
- % of portfolio
- 1.1%
- Quarters held
- 8
- Since Q3 2024
| Quarter | Shares | Value | % of portfolio | Share change | Action | All holders |
|---|---|---|---|---|---|---|
| Q2 2026 | 388,500 | $21.4M | 1.1% | −388,500−50.0% | Reduced | Holders |
| Q1 2026 | 777,000 | $23.2M | 1.0% | −1,346,604−63.4% | Reduced | Holders |
| Q4 2025 | 2,123,604 | $67.0M | 3.1% | 00.0% | Unchanged | Holders |
| Q3 2025 | 2,123,604 | $37.2M | 1.8% | +973,810+84.7% | Added | Holders |
| Q2 2025 | 1,149,794 | $13.1M | 0.8% | −109,479−8.7% | Reduced | Holders |
| Q1 2025 | 1,259,273 | $9.29M | 0.6% | 00.0% | Unchanged | Holders |
| Q4 2024 | 1,259,273 | $23.2M | 0.9% | +83,464+7.1% | Added | Holders |
| Q3 2024 | 1,175,809 | $30.5M | 1.0% | +1,175,809 | New | Holders |