PEAK6 LLC
- SEC CIK
- 0001389958
- Latest filing
- Aug 12, 2026
BIIB holding history
Biogen Inc. in every 13F filed by PEAK6 LLC, 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)
- 14,752
- Value
- $3.19M
- % of portfolio
- 0.1%
- Quarters held
- 5
- Since Q4 2024
| Quarter | Shares | Value | % of portfolio | Share change | Action | All holders |
|---|---|---|---|---|---|---|
| Q2 2026 | 14,752 | $3.19M | 0.1% | −13,414−47.6% | Reduced | Holders |
| Q1 2026 | 28,166 | $5.16M | 0.1% | +28,166 | New | Holders |
| Q3 2025 | 0 | $0 | 0.0% | −17,286−100.0% | Sold out | Holders |
| Q2 2025 | 17,286 | $2.17M | 0.1% | −13,336−43.6% | Reduced | Holders |
| Q1 2025 | 30,622 | $4.19M | 0.2% | +21,871+249.9% | Added | Holders |
| Q4 2024 | 8,751 | $1.34M | 0.1% | – | No prior filing | Holders |