Cross-fund · 5 holders
BIIB
BIOGEN INC
CUSIP 09062X103
5
Tracked holders
$6.30B
Aggregate value
35,048,467
Shares
5
Active funds
Funds holding BIIB
| Fund | Strategy | Period | Value | % of book | Δ shares | Status |
|---|---|---|---|---|---|---|
| Vanguard | Institutional | Q4 2025 | $3.07B | 0.04% | +157,857 | +0.9% |
| BlackRock | Institutional | Q1 2026 | $2.93B | 0.05% | +1,163,231 | +7.9% |
| Point72FEAT | Multi-Strategy | Q1 2026 | $149.3M | 0.19% | -3,000,375 | -78.7% |
| Citadel | Multi-Strategy | Q1 2026 | $97.3M | 0.02% | -78,731 | -12.9% |
| Millennium | Multi-Strategy | Q1 2026 | $51.7M | 0.02% | -991,622 | -77.9% |
Aggregated from the latest 13F-HR per tracked fund (longs only). QoQ deltas compare against each fund's prior quarterly filing.