S&P 500: 679.83 -1.1%
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DOW: 475.01 -0.3%

Biogen Inc.

BIIB Healthcare
$149.61 +$1.75 (1.18%)
Market Cap: $21.94 B
Gurus Holding
10
Popularity Rank
#267
% of Shares Held
4.04%
Net Activity (2025 Q2)
+$459.79 M

Guru Ownership Over Time

Portfolio Manager % of portfolio Activity Shares Value Peroid
Steven Cohen Steven Cohen
0.94% Add 840.9% 3,831,727 $481.23 M 2025 Q2
Renaissance Technologies Renaissance Technologies
0.17% Add 29.9% 1,045,106 $131.25 M 2025 Q2
Sarah Ketterer Sarah Ketterer
0.98% Add 13.8% 493,355 $61.96 M 2025 Q2
Ken Fisher Ken Fisher
0.01% Reduce -3.3% 289,137 $36.31 M 2025 Q2
Joel Greenblatt Joel Greenblatt
0.12% Add 64.8% 163,489 $20.53 M 2025 Q2
Mark Hillman Mark Hillman
2.88% Reduce -4.7% 41,972 $5.27 M 2025 Q2
Jefferies Group Jefferies Group
0.04% Reduce -25.8% 37,117 $4.66 M 2025 Q2
Jeff Auxier Jeff Auxier
0.19% Reduce -24.5% 10,232 $1.29 M 2025 Q2
Paul Tudor Jones Paul Tudor Jones
0.00% Reduce -94.3% 6,000 $753,540 2025 Q2
Murray Stahl Murray Stahl
0.00% Reduce -4.1% 3,038 $381,542 2025 Q2
Showing 1 to 10 of 10 entries

Key Holders

Top 5 by Value

Steven Cohen Steven Cohen
$481.23 M
Renaissance Technologies Renaissance Technologies
$131.25 M
Sarah Ketterer Sarah Ketterer
$61.96 M
Ken Fisher Ken Fisher
$36.31 M
Joel Greenblatt Joel Greenblatt
$20.53 M

Top 5 by Conviction

Mark Hillman Mark Hillman
2.88%
Sarah Ketterer Sarah Ketterer
0.98%
Steven Cohen Steven Cohen
0.94%
Jeff Auxier Jeff Auxier
0.19%
Renaissance Technologies Renaissance Technologies
0.17%

Recent Activity Breakdown(2025 Q2)

+$475.88 M
Total Buy Value
New Buys: 0
Additions: 4
-$16.09 M
Total Sell Value
Reductions: 6
Sold Out: 0

Guru Consensus (2025 Q2)

Based on recent guru activity
Net Sellers
6
Net Buyers
4