1,059 hedge funds and large institutions have $31.7B invested in Biogen in 2020 Q4 according to their latest regulatory filings, with 170 funds opening new positions, 289 increasing their positions, 431 reducing their positions, and 148 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

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

more first-time investments, than exits

New positions opened: | Existing positions closed:

more ownership

Funds ownership:

more funds holding

Funds holding:

15% less capital invested

Capital invested by funds: $37.2B → $31.7B (-$5.44B)

33% less repeat investments, than reductions

Existing positions increased: 289 | Existing positions reduced: 431

61% less funds holding in top 10

Funds holding in top 10: 187 (-11)

Holders
1,059
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
7
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.98B
Puts
$1.64B
Net Calls
Net Calls Change

Top Sellers

1 -$309M
2 -$269M
3 -$201M
4
State Street
State Street
Massachusetts
-$137M
5
Vanguard Group
Vanguard Group
Pennsylvania
-$116M
Name Holding Trade Value Shares
Change
Change in
Stake
326
$3.37M
327
$3.34M
328
$3.31M
329
$3.31M
330
$3.27M
331
$3.27M
332
$3.23M
333
$3.18M
334
$3.18M
335
$3.17M
336
$3.17M
337
$3.16M
338
$3.16M
339
$3.15M
340
$3.14M
341
$3.13M
342
$3.1M
343
$3.08M
344
$3.08M
345
$3.07M
346
$3.05M
347
$3.02M
348
$3.01M
349
$3.01M
350
$2.98M