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
251
$9.03M
252
$8.86M
253
$8.75M
254
$8.66M
255
$8.66M
256
$8.66M
257
$8.59M
258
$8.57M
259
$8.52M
260
$8.45M
261
$8.36M
262
$8.32M
263
$8.31M
264
$8.17M
265
$8.03M
266
$8.02M
267
$7.93M
268
$7.9M
269
$7.86M
270
$7.83M
271
$7.68M
272
$7.66M
273
$7.51M
274
$7.18M
275
$7.11M