1,100 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, 323 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: 83.72%83.55% (-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: 323 | Existing positions reduced: 467

Holders
1,100
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
276
$7.11M
277
$7.1M
278
$7.09M
279
$7.01M
280
$6.93M
281
$6.92M
282
$6.92M
283
$6.79M
284
$6.76M
285
$6.76M
286
$6.74M
287
$6.73M
288
$6.57M
289
$6.53M
290
$6.48M
291
$6.44M
292
$6.38M
293
$6.31M
294
$6.28M
295
$6.23M
296
$6.18M
297
$6.08M
298
$6.05M
299
$6.01M
300
$5.96M