Security key
09062X103
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 127,388,312
- Total 13F value
- $35,598,424,357
- Share change
- -1,524,193
- Put/Call ratio
- 99%
- SEC-reported price per share
- $279.75
- Number of holders
- 1,079
- Value change
- -$380,775,241
- Number of buys
- 464
- Number of sells
- 501
- Shares outstanding
- 147,371,459
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
Q1 2021
Institutions
1,079
Top holders
10
BIIB full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2021
Previous quarter: Q4 2020
BIOGEN INC. SEC filings
BIOGEN INC. company facts
BIOGEN INC. 13D/G history
Broader feeds
Reporting periods
Holder history for CUSIP 09062X103
Recent filing periods:
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
PRIMECAP MANAGEMENT CO/CA/
Disclosed value leader
PRIMECAP MANAGEMENT CO/CA/
Comparable rows
15/15
Latest evidence
31 Dec 2020
13F
Lead comparable stake: 11%
Showing 1-6 of 15 holder rows.
Quick read
PRIMECAP MANAGEMENT CO/CA/ leads the comparable SEC ownership view at 11%.
15 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 PRIMECAP MANAGEMENT CO/CA/'s linked filing trail.
Comparable ownership
Top 5
PRIMECAP MANAGEMENT CO/CA/
11%
BlackRock Finance, Inc.
9.1%
VANGUARD GROUP INC
8.1%
STATE STREET CORP
4.7%
WELLINGTON MANAGEMENT GROUP LLP
3.9%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| PRIMECAP MANAGEMENT CO/CA/ |
13F
Company
|
11%
|
$3,874,191,000
15,822,066 shares
|
— | 31 Dec 2020 |
| BlackRock Finance, Inc. |
13F
Company
|
9.1%
|
$3,285,921,000
13,419,599 shares
|
— | 31 Dec 2020 |
| VANGUARD GROUP INC |
13F
Company
|
8.1%
|
$2,912,979,000
11,896,510 shares
|
— | 31 Dec 2020 |
| STATE STREET CORP |
13F
Company
|
4.7%
|
$1,712,065,000
6,992,015 shares
|
— | 31 Dec 2020 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
3.9%
|
$1,415,774,000
5,781,973 shares
|
— | 31 Dec 2020 |
| Clearbridge Investments, LLC |
13F
Company
|
2.4%
|
$881,171,000
3,598,673 shares
|
— | 31 Dec 2020 |
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 Q1 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
1,079
Shares
127,388,312
Rows available
1,079
| 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 Q1 2021 vs Q4 2020 Across Filers
Q4 2020 holders
1,047
Q1 2021 holders
1,079
Holder diff
32
| Investor | Q4 2020 Shares | Q1 2021 Shares | Share Diff | Share Chg % | Q4 2020 value | Q1 2021 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend