BIIB Ownership
Biogen Inc - Institutional & insider holdings
Ownership Breakdown
Institutions
72+
Stock Price
$178.96
Top Institutional Holders
View All Holders →| Holder | Shares | Value | % Owned |
|---|---|---|---|
| Vanguard Group Inc | 17.45M | $3.08B | 1188.83% |
| BlackRock Inc | 14.76M | $2.60B | 1006.00% |
| PRIMECAP Management Company | 14.76M | $2.60B | 1005.60% |
| FMR Inc | 9.43M | $1.66B | 642.27% |
| Geode Capital Management, LLC | 4.20M | $740.63M | 286.14% |
| Wellington Management Company LLP | 3.55M | $626.32M | 241.98% |
| Fidelity Contrafund | 3.06M | $539.36M | 208.38% |
| Point72 Asset Management, L.P. | 2.81M | $496.15M | 191.69% |
| NORGES BANK | 2.64M | $465.40M | 179.81% |
| JPMorgan Chase & Co | 2.54M | $447.39M | 172.85% |
| Amvescap Plc. | 2.42M | $426.47M | 164.77% |
| T. Rowe Price Investment Management,Inc. | 1.95M | $343.80M | 132.83% |
| iShares Core S&P 500 ETF | 1.89M | $332.80M | 128.58% |
| Boston Partners Global Investors, Inc | 1.72M | $303.45M | 117.24% |
| AQR Capital Management LLC | 1.53M | $269.59M | 104.16% |
Recent Insider Trading
View All Insider Trades →Insider trading data for BIIB is being updated.
Insider trades are reported via SEC Form 4.
Understanding Stock Ownership
Institutional Ownership
Large investors like hedge funds and mutual funds that manage $100M+ must disclose their holdings quarterly via 13F filings. High institutional ownership often indicates strong fundamentals.
Insider Ownership
Company executives and directors must report their trades via SEC Form 4. Insider buying can signal confidence, while selling may occur for various reasons including diversification.
Why It Matters
Ownership structure reveals who believes in the company. Institutional investors conduct deep research, while insider buying shows internal confidence. Track ownership changes for investment signals.
Data Sources
Institutional data from SEC 13F filings (quarterly), insider trades from Form 4 filings (within 2 business days), and company proxy statements (annual ownership disclosures).
Get Full BIIB Analysis
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View Complete AnalysisFrequently Asked Questions
Who owns BIIB?
BIIB (Biogen Inc) is owned by institutional investors (multiple), company insiders (various holdings), and retail investors. The largest institutional holders are disclosed in quarterly SEC 13F filings.
What is BIIB institutional ownership?
BIIB has significant institutional ownership from hedge funds, mutual funds, and investment firms. Check the holdings table above for detailed data.
What is BIIB insider ownership?
Company insiders hold shares of BIIB. Insider trading activity is tracked through SEC Form 4 filings.
Are BIIB insiders buying or selling?
Check the insider trading activity section above for the latest BIIB insider transactions.