Security key
09062X103
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 131,405,263
- Total 13F value
- $20,085,982,511
- Share change
- +2,419,400
- Put/Call ratio
- 137%
- SEC-reported price per share
- $152.92
- Number of holders
- 861
- Value change
- +$272,768,825
- Number of buys
- 361
- Number of sells
- 475
- Shares outstanding
- 147,536,480
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2024
Institutions
861
Top holders
10
BIIB full security history
Ownership snapshot
Full 13F holder table
BIOGEN INC. SEC filings
BIOGEN INC. company facts
BIOGEN INC. 13D/G history
Broader feeds
Ownership snapshot
Top reported holders of BIIB - BIOGEN INC. - COMMON STOCK (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD GROUP INC
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
0/15
Latest evidence
30 Sep 2024
13F
Highest disclosed value: $3,232,961,797
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
VANGUARD GROUP INC has the largest disclosed position value at $3.23B.
0 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD GROUP INC's linked filing trail.
Disclosed position value
Top 5
VANGUARD GROUP INC
$3.23B
PRIMECAP MANAGEMENT CO/CA/
$3.16B
BlackRock, Inc.
$2.97B
STATE STREET CORP
$1.42B
JPMORGAN CHASE & CO
$1.02B
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13F
Company
|
—
denominator unverified
|
$3,232,961,797
16,678,507 shares
|
— | 30 Sep 2024 |
| PRIMECAP MANAGEMENT CO/CA/ |
13F
Company
|
—
denominator unverified
|
$3,162,514,912
16,315,079 shares
|
— | 30 Sep 2024 |
| BlackRock, Inc. |
13F
Company
|
—
denominator unverified
|
$2,974,870,411
15,347,041 shares
|
— | 30 Sep 2024 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$1,423,747,046
7,344,960 shares
|
— | 30 Sep 2024 |
| JPMORGAN CHASE & CO |
13F
Company
|
—
denominator unverified
|
$1,019,079,489
5,257,323 shares
|
— | 30 Sep 2024 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
—
denominator unverified
|
$994,630,453
5,131,193 shares
|
— | 30 Sep 2024 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2024
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
861
Shares
131,405,263
Rows available
861
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2024 vs Q3 2024 Across Filers
Q3 2024 holders
903
Q4 2024 holders
861
Holder diff
-42
| Investor | Q3 2024 Shares | Q4 2024 Shares | Share Diff | Share Chg % | Q3 2024 value | Q4 2024 value | Value change | Value Chg % |
|---|