Companies / Biogen Inc. / Activity

Activity — Biogen Inc.

293 moves.

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InsidersInstitutions
DateActorActionSecurityValueShares ΔPosition afterImpact
Q1 2026
as of
Norges Bank
13F manager
ExitCommon stock$-464.41M-2.6M
-100.00%
0
high
Q2 2026
as of
BlackRock, Inc.
13F manager
AddCommon stock$253.73M+1.2M
+7.93%
15,985,736
10.82% of shares
high
Q1 2026
as of
Millennium Management LLC
13F manager
TrimCommon stock$-189.13M-1.0M
-91.65%
93,964
0.06% of shares
high
Q3 2024
as of
Barclays PLC
13F manager
AddCommon stock$91.80M+474K
+105.80%
921,256
0.62% of shares
high
Q4 2025
as of
Norges Bank
13F manager
AddCommon stock$85.43M+485K
+22.54%
2,638,834
1.79% of shares
high
Q3 2025
as of
Barclays PLC
13F manager
AddCommon stock$78.69M+562K
+70.43%
1,359,424
0.92% of shares
high
Q1 2026
as of
AQR Capital Management, LLC
13F manager
AddCommon stock$71.09M+395K
+25.84%
1,923,557
1.30% of shares
high
Q3 2023
as of
Barclays PLC
13F manager
TrimCommon stock$-49.37M-192K
-32.68%
395,676
0.27% of shares
medium
Q1 2023
as of
Barclays PLC
13F manager
TrimCommon stock$-45.84M-165K
-26.48%
457,843
0.31% of shares
medium
Q1 2026
as of
Two Sigma Investments, LP
13F manager
TrimCommon stock$-44.42M-242K
-96.25%
9,444
<0.01% of shares
medium
Q1 2026
as of
Causeway Capital Management LLC
13F manager
TrimCommon stock$-44.06M-240K
-46.12%
280,783
0.19% of shares
medium
Q1 2026
as of
Glenview Capital Management, LLC
13F manager
TrimCommon stock$-42.82M-234K
-80.38%
57,019
0.04% of shares
medium
Q1 2026
as of
Amundi
13F manager
AddCommon stock$40.04M+218K
+38.15%
790,827
0.54% of shares
medium
Q2 2026
as of
State Street Corporation
13F manager
AddCommon stock$40.04M+185K
+2.59%
7,344,327
4.97% of shares
medium
Q3 2023
as of
Employees Provident Fund Board
13F manager
AddCommon stock$39.81M+155K
+53.88%
442,416
0.30% of shares
medium
Q2 2023
as of
Barclays PLC
13F manager
AddCommon stock$37.01M+130K
+28.38%
587,761
0.40% of shares
medium
Q1 2026
as of
Renaissance Technologies LLC
13F manager
TrimCommon stock$-35.90M-196K
-49.05%
203,396
0.14% of shares
medium
Q4 2023
as of
Barclays PLC
13F manager
AddCommon stock$35.34M+137K
+34.52%
532,260
0.36% of shares
medium
Q2 2020
as of
Employees Provident Fund Board
13F manager
AddCommon stock$35.18M+131K
+412.33%
163,360
0.11% of shares
medium
Q1 2026
as of
Prudential Financial Inc
13F manager
TrimCommon stock$-34.76M-190K
-53.64%
163,887
0.11% of shares
medium
Q4 2023
as of
Employees Provident Fund Board
13F manager
AddCommon stock$31.53M+122K
+27.54%
564,273
0.38% of shares
medium
Q1 2026
as of
Los Angeles Capital Management LLC
13F manager
TrimCommon stock$-31.13M-170K
-82.76%
35,358
0.02% of shares
medium
Q1 2022
as of
Employees Provident Fund Board
13F manager
AddCommon stock$30.06M+143K
+67.15%
355,318
0.24% of shares
medium
Q1 2026
as of
Marshall Wace, LLP
13F manager
TrimCommon stock$-28.61M-156K
-40.43%
229,879
0.16% of shares
medium
Q1 2026
as of
Geode Capital Management, LLC
13F manager
AddCommon stock$26.16M+143K
+3.41%
4,342,602
2.94% of shares
medium
Q3 2022
as of
Leonteq Securities AG
13F manager
TrimCommon stock$-25.45M-95K
-85.26%
16,481
0.01% of shares
medium
Q1 2024
as of
Employees Provident Fund Board
13F manager
AddCommon stock$24.54M+114K
+20.17%
678,080
0.46% of shares
medium
Q1 2026
as of
Nomura Holdings Inc
13F manager
TrimCommon stock$-23.93M-131K
-88.64%
16,730
0.01% of shares
medium
Q1 2026
as of
Perceptive Advisors LLC
13F manager
ExitCommon stock$-21.82M-124K
-100.00%
0
medium
Q2 2024
as of
Barclays PLC
13F manager
TrimCommon stock$-21.54M-93K
-17.19%
447,653
0.30% of shares
medium
Q1 2026
as of
First Trust Advisors LP
13F manager
AddCommon stock$19.82M+108K
+19.11%
673,958
0.46% of shares
medium
Q2 2023
as of
Employees Provident Fund Board
13F manager
TrimCommon stock$-16.38M-58K
-16.67%
287,500
0.19% of shares
medium
Q4 2025
as of
Bank of America Corp /De
13F manager
TrimCommon stock$-16.05M-91K
-7.47%
1,128,845
0.76% of shares
medium
Q4 2024
as of
Leonteq Securities AG
13F manager
AddCommon stock$15.58M+102K
+817.03%
114,363
0.08% of shares
medium
Q2 2025
as of
Barclays PLC
13F manager
TrimCommon stock$-15.16M-121K
-13.14%
797,655
0.54% of shares
medium
Q4 2019
as of
Employees Provident Fund Board
13F manager
NewCommon stock$14.84M+50K
50,000
0.03% of shares
medium
Q1 2026
as of
Victory Capital Management, Inc.
13F manager
AddCommon stock$13.59M+74K
+30.06%
320,785
0.22% of shares
medium
Q4 2022
as of
Employees Provident Fund Board
13F manager
TrimCommon stock$-13.20M-48K
-12.14%
345,000
0.23% of shares
medium
Q2 2026
as of
Deutsche Bank AG
13F manager
TrimCommon stock$-12.90M-60K
-6.26%
894,035
0.61% of shares
medium
Q1 2026
as of
Zurcher Kantonalbank (Zurich Cantonalbank)
13F manager
AddCommon stock$12.78M+70K
+15.41%
522,155
0.35% of shares
medium
Q4 2024
as of
Barclays PLC
13F manager
TrimCommon stock$-12.68M-83K
-9.00%
838,354
0.57% of shares
medium
Q4 2021
as of
Leonteq Securities AG
13F manager
AddCommon stock$12.16M+51K
+143.17%
86,120
0.06% of shares
medium
Q3 2025
as of
Leonteq Securities AG
13F manager
TrimCommon stock$-12.01M-86K
-78.77%
23,117
0.02% of shares
medium
Q1 2026
as of
Orbimed Advisors LLC
13F manager
NewCommon stock$11.29M+62K
61,600
0.04% of shares
medium
Q1 2025
as of
Barclays PLC
13F manager
AddCommon stock$10.95M+80K
+9.54%
918,353
0.62% of shares
medium
Q1 2026
as of
Credit Agricole S a
13F manager
TrimCommon stock$-9.86M-54K
-70.06%
22,985
0.02% of shares
medium
Q3 2021
as of
Leonteq Securities AG
13F manager
AddCommon stock$9.67M+34K
+2740.10%
35,416
0.02% of shares
medium
Q4 2025
as of
Barclays PLC
13F manager
TrimCommon stock$-9.58M-54K
-4.00%
1,305,007
0.88% of shares
medium
Q4 2020
as of
Employees Provident Fund Board
13F manager
AddCommon stock$9.48M+39K
+23.70%
202,069
0.14% of shares
medium
Q1 2026
as of
D. E. Shaw & Co., Inc.
13F manager
ExitCommon stock$-9.46M-54K
-100.00%
0
medium
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