BIOGEN INC (BIIB): Institutional Ownership
Hedge funds and institutional managers reporting a position in BIIB · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
25
13F filers
Aggregate Value
$3.2B
Across holders
Last Price
$216.03
2026-06-26
Sector
Health Care
GICS
Holder activity5 new9 added11 reduced
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| PRIMECAP MANAGEMENT CO/CA/ CIK 0000763212 | Institutional Manager | 14.76M | $2.7B | 84.0% | 2.1% | Reduced | $-71K | Q1 2026 |
| BALYASNY ASSET MANAGEMENT LLC CIK 0001218710 | Hedge Fund | 650K | $119.2M | 3.7% | 0.2% | Added | +$7.7M | Q1 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 0001165408 | Hedge Fund | 333K | $61.1M | 1.9% | 0.1% | Added | +$7.2M | Q1 2026 |
| Fisher Asset Management, LLC CIK 0000850529 | Institutional Manager | 313K | $57.3M | 1.8% | 0.0% | Added | +$3.5M | Q1 2026 |
| Man Group plc CIK 0001637460 | Hedge Fund | 304K | $55.7M | 1.7% | 0.1% | Reduced | $-2.0M | Q1 2026 |
| Gotham Asset Management, LLC CIK 0001510387 | Hedge Fund | 298K | $54.7M | 1.7% | 0.2% | Added | +$4.0M | Q1 2026 |
| RENAISSANCE TECHNOLOGIES LLC CIK 0001037389 | Hedge Fund | 203K | $37.3M | 1.2% | 0.1% | Reduced | $-35.9M | Q1 2026 |
| Hudson Bay Capital Management LP CIK 0001393825 | Hedge Fund | 201K | $36.9M | 1.1% | 0.1% | Added | +$34.3M | Q1 2026 |
| ExodusPoint Capital Management, LP CIK 0001736225 | Hedge Fund | 152K | $27.9M | 0.9% | 0.2% | New | — | Q1 2026 |
| Brevan Howard Capital Management LP CIK 0001512857 | Hedge Fund | 71K | $12.5M | 0.4% | 0.1% | New | — | Q4 2025 |
| GLENVIEW CAPITAL MANAGEMENT LLC CIK 0001138995 | Hedge Fund | 57K | $10.5M | 0.3% | 0.3% | Reduced | $-42.8M | Q1 2026 |
| Schonfeld Strategic Advisors LLC CIK 0001665241 | Hedge Fund | 49K | $9.0M | 0.3% | 0.1% | Reduced | $-10.7M | Q1 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 41K | $7.5M | 0.2% | 0.0% | Reduced | $-22.2M | Q1 2026 |
| Walleye Capital LLC CIK 0001758720 | Hedge Fund | 35K | $6.5M | 0.2% | 0.0% | Reduced | $-2.7M | Q1 2026 |
| Bridgewater Associates, LP CIK 0001350694 | Hedge Fund | 40K | $5.6M | 0.2% | 0.0% | New | — | Q3 2025 |
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 20K | $3.6M | 0.1% | 0.0% | Added | +$3.0M | Q1 2026 |
| Verition Fund Management LLC CIK 0001454027 | Hedge Fund | 19K | $3.3M | 0.1% | 0.0% | New | — | Q4 2025 |
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 16K | $2.9M | 0.1% | 0.0% | Reduced | $-17.0M | Q1 2026 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 10K | $1.9M | 0.1% | 0.0% | Added | +$1.8M | Q1 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 9K | $1.7M | 0.1% | 0.0% | Reduced | $-44.4M | Q1 2026 |
Reduced
Institutional Manager
$2.7B· 84.0% of total· 2.1% port· 14.76M sh· $-71K QoQ· Q1 2026
Added
Hedge Fund
$119.2M· 3.7% of total· 0.2% port· 650K sh· +$7.7M QoQ· Q1 2026
Added
Hedge Fund
$61.1M· 1.9% of total· 0.1% port· 333K sh· +$7.2M QoQ· Q1 2026
Added
Institutional Manager
$57.3M· 1.8% of total· 0.0% port· 313K sh· +$3.5M QoQ· Q1 2026
Reduced
Hedge Fund
$55.7M· 1.7% of total· 0.1% port· 304K sh· $-2.0M QoQ· Q1 2026
Added
Hedge Fund
$54.7M· 1.7% of total· 0.2% port· 298K sh· +$4.0M QoQ· Q1 2026
Reduced
Hedge Fund
$37.3M· 1.2% of total· 0.1% port· 203K sh· $-35.9M QoQ· Q1 2026
Added
Hedge Fund
$36.9M· 1.1% of total· 0.1% port· 201K sh· +$34.3M QoQ· Q1 2026
New
Hedge Fund
$27.9M· 0.9% of total· 0.2% port· 152K sh· — QoQ· Q1 2026
New
Hedge Fund
$12.5M· 0.4% of total· 0.1% port· 71K sh· — QoQ· Q4 2025
Reduced
Hedge Fund
$10.5M· 0.3% of total· 0.3% port· 57K sh· $-42.8M QoQ· Q1 2026
Reduced
Hedge Fund
$9.0M· 0.3% of total· 0.1% port· 49K sh· $-10.7M QoQ· Q1 2026
Reduced
Hedge Fund
$7.5M· 0.2% of total· 0.0% port· 41K sh· $-22.2M QoQ· Q1 2026
Reduced
Hedge Fund
$6.5M· 0.2% of total· 0.0% port· 35K sh· $-2.7M QoQ· Q1 2026
New
Hedge Fund
$5.6M· 0.2% of total· 0.0% port· 40K sh· — QoQ· Q3 2025
Added
Hedge Fund
$3.6M· 0.1% of total· 0.0% port· 20K sh· +$3.0M QoQ· Q1 2026
New
Hedge Fund
$3.3M· 0.1% of total· 0.0% port· 19K sh· — QoQ· Q4 2025
Reduced
Hedge Fund
$2.9M· 0.1% of total· 0.0% port· 16K sh· $-17.0M QoQ· Q1 2026
Added
Hedge Fund
$1.9M· 0.1% of total· 0.0% port· 10K sh· +$1.8M QoQ· Q1 2026
Reduced
Hedge Fund
$1.7M· 0.1% of total· 0.0% port· 9K sh· $-44.4M QoQ· Q1 2026
New
Hedge Fund
$879K· 0.0% of total· 0.0% port· 5K sh· — QoQ· Q1 2026
Reduced
Hedge Fund
$730K· 0.0% of total· 0.0% port· 4K sh· $-1.3M QoQ· Q3 2024
Added
Hedge Fund
$243K· 0.0% of total· 0.0% port· 1K sh· +$2K QoQ· Q1 2026
Reduced
Hedge Fund
$202K· 0.0% of total· 0.0% port· 1K sh· $-1.7M QoQ· Q1 2026
Added
Hedge Fund
$41K· 0.0% of total· 0.0% port· 224 sh· +$18K QoQ· Q1 2026
1–20 of 25
1 / 2