WestEnd Advisors, LLC
- SEC CIK
- 0001351731
- Latest filing
- Jul 22, 2026
BIIB holding history
Biogen Inc. in every 13F filed by WestEnd Advisors, 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)
- 13
- Value
- $2.81K
- % of portfolio
- <0.1%
- Quarters held
- 20
- Since Q2 2021
| Quarter | Shares | Value | % of portfolio | Share change | Action | All holders |
|---|---|---|---|---|---|---|
| Q2 2026 | 13 | $2.81K | <0.1% | +1+8.3% | Added | Holders |
| Q1 2026 | 12 | $2.20K | <0.1% | 00.0% | Unchanged | Holders |
| Q4 2025 | 12 | $2.11K | <0.1% | +8+200.0% | Added | Holders |
| Q3 2025 | 4 | $560 | <0.1% | −2−33.3% | Reduced | Holders |
| Q2 2025 | 6 | $754 | <0.1% | 00.0% | Unchanged | Holders |
| Q1 2025 | 6 | $821 | <0.1% | +4+200.0% | Added | Holders |
| Q4 2024 | 2 | $306 | <0.1% | 00.0% | Unchanged | Holders |
| Q3 2024 | 2 | $388 | <0.1% | 00.0% | Unchanged | Holders |
| Q2 2024 | 2 | $464 | <0.1% | 00.0% | Unchanged | Holders |
| Q1 2024 | 2 | $431 | <0.1% | 00.0% | Unchanged | Holders |
| Q4 2023 | 2 | $518 | <0.1% | 00.0% | Unchanged | Holders |
| Q3 2023 | 2 | $514 | <0.1% | +2 | New | Holders |
| Q2 2023 | 0 | $0 | 0.0% | – | Sold out | Holders |
| Q1 2023 | – | $556 | <0.1% | – | – | Holders |
| Q4 2022 | 2 | $554 | <0.1% | 00.0% | Unchanged | Holders |
| Q3 2022 | 2 | $1.00K | <0.1% | 00.0% | Unchanged | Holders |
| Q2 2022 | 2 | $407 | <0.1% | – | – | Holders |
| Q1 2022 | – | $210 | <0.1% | – | – | Holders |
| Q4 2021 | 1 | $239 | <0.1% | – | – | Holders |
| Q3 2021 | – | $282 | <0.1% | – | – | Holders |
| Q2 2021 | – | $346 | <0.1% | – | New | Holders |