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Biogen
BIIB

Overview Fund Activity

868 hedge funds and large institutions have $17.4B invested in Biogen in 2025 Q1 according to their latest regulatory filings, with 127 funds opening new positions, 328 increasing their positions, 264 reducing their positions, and 105 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
868
Holders Change
+8
Holders Change %
+0.93%
% of All Funds
11.79%
Holding in Top 10
2
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-50%
% of All Funds
0.03%
New
127
Increased
328
Reduced
264
Closed
105
Calls
$345M
Puts
$621M
Net Calls
-$276M
Net Calls Change
-$229M

Top Buyers

1
AQR Capital Management
AQR Capital Management
Connecticut
$187M
2
Balyasny Asset Management
Balyasny Asset Management
Illinois
$108M
3
SG Americas Securities
SG Americas Securities
New York
$98.5M
4
Fidelity Investments
Fidelity Investments
Massachusetts
$179M
5
Point72 Asset Management
Point72 Asset Management
Connecticut
$55.7M

Top Sellers

1
Pacer Advisors
Pacer Advisors
Pennsylvania
$185M
2
BGC
Beutel, Goodman & Co
Ontario, Canada
$1K
3
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
$158M
4
JPMorgan Chase & Co
JPMorgan Chase & Co
New York
$200M
5
O
OrbiMed
New York
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
EFM
301
E Fund Management
China
$1.83M +$432K +3,160 +31%
PCA
302
Pallas Capital Advisors
Massachusetts
$1.83M +$1.05M +7,694 +136%
William Blair & Company
303
William Blair & Company
Illinois
$1.82M +$32K +234 +2%
Cetera Investment Advisers
304
Cetera Investment Advisers
Illinois
$1.73M -$90.5K -661 -5%
OPERF
305
Oregon Public Employees Retirement Fund
Oregon
$1.72M +$15.1K +110 +0.9%
CAPTRUST Financial Advisors
306
CAPTRUST Financial Advisors
North Carolina
$1.72M +$393K +2,870 +30%
PCOTEOTHU
307
Provident Company of the Employees of the Hebrew University
Israel
$1.71M +$475K +3,470 +38%
BMSSC
308
B. Metzler seel. Sohn & Co
Germany
$1.71M +$322K +2,354 +23%
Group One Trading
309
Group One Trading
Illinois
$1.69M -$6.23M -45,544 -79%
M&T Bank
310
M&T Bank
New York
$1.68M -$302K -2,207 -15%
FAM
311
Fred Alger Management
New York
$1.66M +$1.66M +12,159 New
EW
312
Evoke Wealth
California
$1.62M +$35.9K +262 +2%
CEI
313
Clark Estates Inc
New York
$1.61M -$616K -4,504 -28%
MSU
314
Mizuho Securities USA
New York
$1.6M -$286K -2,091 -15%
HighTower Advisors
315
HighTower Advisors
Illinois
$1.6M +$453K +3,312 +39%
SC
316
SummitTX Capital
Texas
$1.6M +$1.6M +11,682 New
Public Employees Retirement Association of Colorado
317
Public Employees Retirement Association of Colorado
Colorado
$1.6M -$1.01M -7,374 -39%
Pathstone Holdings
318
Pathstone Holdings
New Jersey
$1.6M +$138K +1,010 +9%
NB
319
Norinchukin Bank
Japan
$1.58M +$485K +3,542 +44%
CCIA
320
Campbell & Co Investment Adviser
Maryland
$1.58M -$2.59M -18,936 -62%
TCM
321
Twin Capital Management
Pennsylvania
$1.58M +$414K +3,029 +36%
TRSOTSOK
322
Teachers Retirement System of the State of Kentucky
Kentucky
$1.53M +$41.2K +301 +3%
Walleye Trading
323
Walleye Trading
New York
$1.53M +$1.53M +11,191 New
OTPPB
324
Ontario Teachers' Pension Plan Board
Ontario, Canada
$1.48M +$1.48M +10,849 New
FDCDDQ
325
Federation des caisses Desjardins du Quebec
Quebec, Canada
$1.47M -$89.4K -653 -6%
11 12
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