1,083 hedge funds and large institutions have $40.6B invested in Biogen in 2019 Q1 according to their latest regulatory filings, with 118 funds opening new positions, 389 increasing their positions, 437 reducing their positions, and 164 closing their positions.

New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership:

less funds holding

Funds holding:

less call options, than puts

Call options by funds: $ | Put options by funds: $

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

22% less capital invested

Capital invested by funds: $52.2B → $40.6B (-$11.7B)

24% less funds holding in top 10

Funds holding in top 10: 2922 (-7)

28% less first-time investments, than exits

New positions opened: 118 | Existing positions closed: 164

Holders
1,083
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
22
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.15B
Puts
$1.28B
Net Calls
Net Calls Change

Top Buyers

1 +$250M
2 +$210M
3 +$206M
4
Boston Partners
Boston Partners
Massachusetts
+$177M
5
D.E. Shaw & Co
D.E. Shaw & Co
New York
+$154M

Top Sellers

1 -$382M
2 -$265M
3 -$208M
4
VOYA Investment Management
VOYA Investment Management
Georgia
-$192M
5
O
OrbiMed
New York
-$177M
Name Holding Trade Value Shares
Change
Change in
Stake
376
$3.51M
377
$3.51M
378
$3.46M
379
$3.42M
380
$3.37M
381
$3.37M
382
$3.35M
383
$3.35M
384
$3.35M
385
$3.33M
386
$3.32M
387
$3.31M
388
$3.22M
389
$3.19M
390
$3.18M
391
$3.17M
392
$3.16M
393
$3.08M
394
$3.04M
395
$3.03M
396
$3.03M
397
$3.02M
398
$2.96M
399
$2.93M
400
$2.85M