1,099 hedge funds and large institutions have $43.4B invested in Biogen in 2021 Q2 according to their latest regulatory filings, with 134 funds opening new positions, 322 increasing their positions, 467 reducing their positions, and 110 closing their positions.

New
Increased
Maintained
Reduced
Closed

more funds holding in top 10

Funds holding in top 10:

more capital invested

Capital invested by funds: $ → $

more first-time investments, than exits

New positions opened: | Existing positions closed:

more funds holding

Funds holding:

0.18% less ownership

Funds ownership: 83.71%83.53% (-0.18%)

6% less call options, than puts

Call options by funds: $1.8B | Put options by funds: $1.91B

31% less repeat investments, than reductions

Existing positions increased: 322 | Existing positions reduced: 467

Holders
1,099
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
27
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.8B
Puts
$1.91B
Net Calls
Net Calls Change

Top Buyers

1 +$508M
2 +$169M
3 +$130M
4
Citadel Advisors
Citadel Advisors
Florida
+$115M
5
HM
HealthCor Management
New York
+$89.6M
Name Holding Trade Value Shares
Change
Change in
Stake
301
$5.88M
302
$5.77M
303
$5.69M
304
$5.68M
305
$5.55M
306
$5.55M
307
$5.54M
308
$5.43M
309
$5.41M
310
$5.39M
311
$5.35M
312
$5.34M
313
$5.32M
314
$5.19M
315
$5.19M
316
$5.17M
317
$5.15M
318
$5.02M
319
$4.96M
320
$4.96M
321
$4.91M
322
$4.91M
323
$4.81M
324
$4.79M
325
$4.51M