$188.83
-5.51 (-2.83%)
Market Cap
$28.5B
Shares Outstanding
146,758,528
Institutional Holders
861
Total Inst. Value
$48.0B
% of Float Held
87.5%
QoQ Holder Change
+209
Institutional data as of Q1 2025
New Positions
211
Closed Positions
114
Increased
292
Decreased
242
Institutional Ownership Trend
Top 10 Institutional Holders(Q1 2025)
| # | Fund | Value | Shares |
|---|---|---|---|
| 1 | CANADA PENSION PLAN INVESTMENT BOARD | $31.6B | 230,804 |
| 2 | VANGUARD GROUP INC | $2.3B | 17,032,839 |
| 3 | PRIMECAP MANAGEMENT CO/CA/ | $2.2B | 15,943,259 |
| 4 | BlackRock, Inc. | $2.1B | 15,211,036 |
| 5 | STATE STREET CORP | $1.0B | 7,396,910 |
| 6 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | $757.0M | 5,532 |
| 7 | WELLINGTON MANAGEMENT GROUP LLP | $639.4M | 4,672,437 |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $524.8M | 3,846,864 |
| 9 | T. Rowe Price Investment Management, Inc. | $364.0M | 2,660,290 |
| 10 | Invesco Ltd. | $309.9M | 2,265,007 |
Biggest Buyers & Sellers This Quarter
Top Buyers
| Fund | Shares Added | Value |
|---|---|---|
| VANGUARD GROUP INC | +284K | $2.3B |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | +177 | $757.0M |
| GEODE CAPITAL MANAGEMENT, LLC | +151K | $524.8M |
| Invesco Ltd. | +136K | $309.9M |
| MORGAN STANLEY | +208K | $272.4M |
Top Sellers
| Fund | Shares Removed | Value |
|---|---|---|
| Pacer Advisors, Inc. | -1.3M | $467K |
| PRICE T ROWE ASSOCIATES INC /MD/ | -783K | $157.5M |
| JPMORGAN CHASE & CO | -633K | $200.3M |
| T. Rowe Price Investment Management, Inc. | -439K | $364.0M |
| WORLDQUANT MILLENNIUM ADVISORS LLC | -404K | $7.8M |
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Frequently Asked Questions
How many institutional investors hold BIIB?
As of Q1 2025, 861 institutional investors report holding BIIB (Biogen Inc.) in their 13F filings.
What percentage of Biogen Inc. is owned by institutions?
Institutional investors hold approximately 87.5% of Biogen Inc.'s float as reported in SEC 13F filings.
Which hedge fund owns the most BIIB?
The largest institutional holder of BIIB is CANADA PENSION PLAN INVESTMENT BOARD with $31.6B in shares.
Are institutions buying or selling BIIB?
This quarter, 211 institutions opened new positions in BIIB and 114 closed their positions.
What is 13F institutional ownership?
SEC Form 13F is a quarterly report filed by institutional investment managers with over $100M in qualifying assets. It discloses their US equity holdings, providing transparency into what the largest investors are buying and selling.
How often is institutional ownership data updated?
13F filings are due 45 days after each calendar quarter end (May 15, Aug 14, Nov 14, Feb 14). Data is updated on HedgeTrace as new filings are processed.