Who owns BIIB? 13F holders and whale ownership
BIIB is tracked across public portfolios in Whale Analyzer. This page answers who owns BIIB, which top funds are buying BIIB, aggregate disclosed value, and recent position changes based on public data.
Open interactive stock dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| PRIMECAP Management 13F portfolio PRIMECAP Management Company holdings | $2.71B | 14.8M | Reduced |
| Samuel Isaly 13F portfolio OrbiMed Advisors holdings | $11.3M | 61.6K | New |
How to read this page
Values are reported public positions from tracked investors and institutions. They are not real-time ownership totals for the company.
Related stock holder pages
- LLY whale holders — ELI LILLY & CO
- MU whale holders — MICRON TECHNOLOGY INC
- GOOGL whale holders — ALPHABET INC
- AZN whale holders — ASTRAZENECA PLC
- KLAC whale holders — KLA CORP
- INTC whale holders — INTEL CORP
- AMGN whale holders — AMGEN INC
- NVDA whale holders — NVIDIA CORPORATION
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Frequently asked questions
Who owns BIIB stock?
Whale Analyzer tracks 2 public institutional holders of BIIB with a combined reported value of $2.72B. See the holder table above for the largest tracked positions.
Which top funds are buying BIIB?
Check the "Change" column in the holders table above. "New" means a fresh position was initiated, "Added" means an existing position was increased, and "Reduced" or "Sold" indicates trimming.
What does 13F ownership mean for BIIB?
Use the interactive BIIB dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.