Ostrum Asset Management
- SEC CIK
- 0001767945
- Latest filing
- Aug 13, 2026
BIIB holding history
Biogen Inc. in every 13F filed by Ostrum Asset Management, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.
BIIB overviewAll 13F holders of BIIBFull Q2 2026 holdings
- Shares (Q2 2026)
- 1,767
- Value
- $381.8K
- % of portfolio
- <0.1%
- Quarters held
- 14
- Since Q1 2023
| Quarter | Shares | Value | % of portfolio | Share change | Action | All holders |
|---|---|---|---|---|---|---|
| Q2 2026 | 1,767 | $381.8K | <0.1% | 00.0% | Unchanged | Holders |
| Q1 2026 | 1,767 | $323.9K | <0.1% | −709−28.6% | Reduced | Holders |
| Q4 2025 | 2,476 | $435.8K | <0.1% | −8,982−78.4% | Reduced | Holders |
| Q3 2025 | 11,458 | $1.61M | 0.1% | −3,067−21.1% | Reduced | Holders |
| Q2 2025 | 14,525 | $1.82M | 0.1% | −183−1.2% | Reduced | Holders |
| Q1 2025 | 14,708 | $2.01M | 0.1% | −173−1.2% | Reduced | Holders |
| Q4 2024 | 14,881 | $2.28M | 0.2% | −7,023−32.1% | Reduced | Holders |
| Q3 2024 | 21,904 | $4.25M | 0.4% | +167+0.8% | Added | Holders |
| Q2 2024 | 21,737 | $5.04M | 0.4% | −1,056−4.6% | Reduced | Holders |
| Q1 2024 | 22,793 | $4.91M | 0.4% | +2,483+12.2% | Added | Holders |
| Q4 2023 | 20,310 | $5.26M | 0.5% | +9,112+81.4% | Added | Holders |
| Q3 2023 | 11,198 | $2.88M | 0.3% | +56+0.5% | Added | Holders |
| Q2 2023 | 11,142 | $3.17M | 0.3% | +720+6.9% | Added | Holders |
| Q1 2023 | 10,422 | $2.90M | 0.3% | – | No prior filing | Holders |