Security key
09062X103
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 13,801
- Total 13F value
- $3,118,616
- Share change
- -120
- SEC-reported price per share
- $225.88
- Number of holders
- 19
- Value change
- -$22,509
- Number of buys
- 5
- Number of sells
- 5
- Shares outstanding
- 147,536,480
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2026
Institutions
19
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
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
FMR LLC
Disclosed value leader
FMR LLC
Comparable rows
15/15
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 12%
13D/G row: FMR LLC
Showing 1-6 of 15 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 12%.
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 FMR LLC's linked filing trail.
Comparable ownership
Top 5
FMR LLC
12%
PRIMECAP MANAGEMENT CO/CA/
10%
BlackRock, Inc.
8.5%
VANGUARD CAPITAL MANAGEMENT LLC
7.5%
STATE STREET CORP
5%
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 |
|---|---|---|---|---|---|
| FMR LLC |
13D/G
13F
Company
|
12%
|
$3,952,714,750
18,294,524 shares
|
+$354,673,077 | 30 Jun 2026 |
| PRIMECAP MANAGEMENT CO/CA/ |
13F
13D/G
Company
|
10%
from 13D/G
|
$3,274,304,389
15,154,606 shares
|
— | 30 Jun 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
8.5%
from 13D/G
|
$3,453,877,982
15,985,736 shares
|
— | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Capital Management
|
7.5%
from 13D/G
|
$2,085,220,339
9,651,117 shares
|
— | 30 Jun 2026 |
| STATE STREET CORP |
13F
13D/G
Company · STATE STREET CORPORATION
|
5%
from 13D/G
|
$1,586,815,292
7,344,327 shares
|
— | 30 Jun 2026 |
| Caroline Dorsa |
3/4/5
Director
|
0.02%
|
$3,931,673
31,002 shares
|
— | 17 Jun 2025 |
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 Q3 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
19
Shares
13,801
Rows available
19
| 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 Q3 2026 vs Q2 2026 Across Filers
Q2 2026 holders
1,044
Q3 2026 holders
19
Holder diff
-1,025
| Investor | Q2 2026 Shares | Q3 2026 Shares | Share Diff | Share Chg % | Q2 2026 value | Q3 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend