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BIIB US
Biogen Inc.
(BIIB US)
$250.69
-3.15
1.24%
Ext:
$245.05
-5.64
2.25%
(Market Closed · 23:55:35 UTC)
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Financials & Metrics
Financials
Charting
Short Interest
Employees
SEC Filings by Owner
Select Filings
Insider Ownership
ALEXANDER SUSAN H
(84)
Expand
4
PRIMARY DOCUMENT
17 Feb
4
PRIMARY DOCUMENT
10 Feb
4
PRIMARY DOCUMENT
12 Feb 2025
4
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10 Feb 2025
4
PRIMARY DOCUMENT
7 Nov 2024
4
PRIMARY DOCUMENT
21 Feb 2024
4
PRIMARY DOCUMENT
13 Feb 2024
4
PRIMARY DOCUMENT
9 Feb 2024
4
PRIMARY DOCUMENT
31 Jan 2024
4
PRIMARY DOCUMENT
22 Feb 2023
MULLEN JAMES C
(77)
Expand
4
PRIMARY DOCUMENT
10 Jun 2010
4
PRIMARY DOCUMENT
23 Mar 2010
4
PRIMARY DOCUMENT
1 Mar 2010
4
PRIMARY DOCUMENT
17 Feb 2010
4
PRIMARY DOCUMENT
18 Dec 2009
4
PRIMARY DOCUMENT
26 Feb 2009
4
PRIMARY DOCUMENT
17 Feb 2009
4
PRIMARY DOCUMENT
10 Feb 2009
4
Statement of changes in beneficial ownership
17 Apr 2008
4
Statement of changes in beneficial ownership
15 Apr 2008
SCANGOS GEORGE A
(68)
Expand
4
PRIMARY DOCUMENT
22 Jul 2016
4
Statement of changes in beneficial ownership
6 Jun 2016
4
PRIMARY DOCUMENT
2 Jun 2016
4
PRIMARY DOCUMENT
27 May 2016
4
PRIMARY DOCUMENT
4 May 2016
4
PRIMARY DOCUMENT
7 Apr 2016
4
PRIMARY DOCUMENT
5 Apr 2016
4
PRIMARY DOCUMENT
3 Mar 2016
4
PRIMARY DOCUMENT
25 Feb 2016
4
PRIMARY DOCUMENT
24 Feb 2016
SCHNEIER CRAIG ERIC
(65)
Expand
4
PRIMARY DOCUMENT
3 Mar 2011
4
PRIMARY DOCUMENT
28 Feb 2011
4
PRIMARY DOCUMENT
25 Feb 2011
4
PRIMARY DOCUMENT
18 Feb 2011
4
PRIMARY DOCUMENT
15 Feb 2011
4
PRIMARY DOCUMENT
11 Feb 2011
4
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24 Jan 2011
4
PRIMARY DOCUMENT
21 Dec 2010
4
PRIMARY DOCUMENT
7 Dec 2010
4
PRIMARY DOCUMENT
4 Mar 2010
Clancy Paul J
(56)
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4
PRIMARY DOCUMENT
27 Apr 2017
4
PRIMARY DOCUMENT
14 Mar 2017
4
PRIMARY DOCUMENT
2 Mar 2017
4
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17 Feb 2017
4
PRIMARY DOCUMENT
25 Feb 2016
4
PRIMARY DOCUMENT
24 Feb 2016
4
PRIMARY DOCUMENT
17 Feb 2016
4
PRIMARY DOCUMENT
9 Feb 2016
4
PRIMARY DOCUMENT
25 Feb 2015
4
PRIMARY DOCUMENT
17 Feb 2015
Sandrock Alfred
(48)
Expand
4
PRIMARY DOCUMENT
9 Jun 2021
4
PRIMARY DOCUMENT
22 Feb 2021
4
PRIMARY DOCUMENT
17 Feb 2021
4
PRIMARY DOCUMENT
29 Jan 2021
4
PRIMARY DOCUMENT
6 Nov 2020
4
PRIMARY DOCUMENT
19 Feb 2020
4
PRIMARY DOCUMENT
14 Feb 2020
4
PRIMARY DOCUMENT
26 Feb 2019
4
PRIMARY DOCUMENT
20 Feb 2019
4
PRIMARY DOCUMENT
14 Feb 2019
WIGGINS MARK C
(47)
Expand
4
PRIMARY DOCUMENT
29 Sep 2008
4
Statement of changes in beneficial ownership
28 Jul 2008
4
Statement of changes in beneficial ownership
16 Jul 2008
4/A
Statement of changes in beneficial ownership (amendment)
15 Feb 2008
4
Statement of changes in beneficial ownership
14 Feb 2008
4
Statement of changes in beneficial ownership
7 Feb 2008
4
Statement of changes in beneficial ownership
3 Jan 2008
4
Statement of changes in beneficial ownership
17 Oct 2007
4
Statement of changes in beneficial ownership
7 Sep 2007
4
Statement of changes in beneficial ownership
29 Aug 2007
PANGIA ROBERT W
(43)
Expand
5
PRIMARY DOCUMENT
9 Feb 2021
4
PRIMARY DOCUMENT
5 Jun 2020
4
PRIMARY DOCUMENT
20 Jun 2019
4
PRIMARY DOCUMENT
19 Mar 2019
4
PRIMARY DOCUMENT
14 Jun 2018
4
PRIMARY DOCUMENT
10 Jan 2018
4
PRIMARY DOCUMENT
9 Jun 2017
4
PRIMARY DOCUMENT
10 Jan 2017
4
PRIMARY DOCUMENT
9 Jun 2016
4
PRIMARY DOCUMENT
11 Jun 2015
DUNN JOHN MICHAEL
(38)
Expand
4
PRIMARY DOCUMENT
26 Feb 2009
4
PRIMARY DOCUMENT
20 Feb 2009
4
PRIMARY DOCUMENT
17 Feb 2009
4
PRIMARY DOCUMENT
13 Feb 2009
4
PRIMARY DOCUMENT
10 Feb 2009
4
Statement of changes in beneficial ownership
5 Aug 2008
4
Statement of changes in beneficial ownership
24 Jul 2008
4
Statement of changes in beneficial ownership
22 Jul 2008
4/A
Statement of changes in beneficial ownership (amendment)
22 Jul 2008
4
Statement of changes in beneficial ownership
3 Jun 2008
Cox John
(37)
Expand
4
PRIMARY DOCUMENT
5 Apr 2016
4
PRIMARY DOCUMENT
25 Feb 2016
4
PRIMARY DOCUMENT
24 Feb 2016
4
PRIMARY DOCUMENT
17 Feb 2016
4
PRIMARY DOCUMENT
9 Feb 2016
4
PRIMARY DOCUMENT
26 Mar 2015
4
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25 Feb 2015
4
PRIMARY DOCUMENT
17 Feb 2015
4
PRIMARY DOCUMENT
10 Feb 2015
4
PRIMARY DOCUMENT
25 Feb 2014
BIOGEN INC.
(36)
Expand
3
Initial statement of beneficial ownership
6 Apr
4
Statement of changes in beneficial ownership
28 Sep 2023
3
Initial statement of beneficial ownership
7 Aug 2023
4
Statement of changes in beneficial ownership
31 Aug 2022
4
Statement of changes in beneficial ownership
30 Dec 2021
4
Statement of changes in beneficial ownership
28 Dec 2021
4
Statement of changes in beneficial ownership
10 Dec 2021
4
Statement of changes in beneficial ownership
9 Dec 2021
4
Statement of changes in beneficial ownership
3 Dec 2021
4
Statement of changes in beneficial ownership
30 Nov 2021
ADELMAN BURT A
(36)
Expand
5
Annual statement of beneficial ownership
14 Feb 2008
4
Statement of changes in beneficial ownership
17 Oct 2007
4
Statement of changes in beneficial ownership
31 Aug 2007
4
Statement of changes in beneficial ownership
29 Aug 2007
4
Statement of changes in beneficial ownership
21 Aug 2007
4
Statement of changes in beneficial ownership
27 Jul 2007
4
Statement of changes in beneficial ownership
3 Jul 2007
4
Statement of changes in beneficial ownership
22 Mar 2007
4
Statement of changes in beneficial ownership
16 Mar 2007
4
Statement of changes in beneficial ownership
15 Feb 2007
SHERWIN STEPHEN A
(34)
Expand
4
PRIMARY DOCUMENT
11 Jun
4
PRIMARY DOCUMENT
18 Jun 2025
4
PRIMARY DOCUMENT
10 Mar 2025
4
PRIMARY DOCUMENT
25 Jun 2024
4
PRIMARY DOCUMENT
28 Jun 2023
5
PRIMARY DOCUMENT
27 Jan 2023
4
PRIMARY DOCUMENT
17 Jun 2022
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PRIMARY DOCUMENT
2 Jul 2021
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PRIMARY DOCUMENT
5 Jun 2020
4
PRIMARY DOCUMENT
12 Mar 2020
Hamm Robert A
(34)
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PRIMARY DOCUMENT
26 Apr 2010
4/A
PRIMARY DOCUMENT
16 Apr 2010
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5 Apr 2010
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PRIMARY DOCUMENT
25 Feb 2010
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PRIMARY DOCUMENT
19 Feb 2010
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17 Feb 2010
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5 Nov 2009
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PRIMARY DOCUMENT
3 Nov 2009
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24 Jun 2009
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2 Apr 2009
SCHENK LYNN
(33)
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PRIMARY DOCUMENT
20 Jun 2019
4
PRIMARY DOCUMENT
3 Dec 2018
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14 Jun 2018
4
PRIMARY DOCUMENT
9 Jun 2017
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PRIMARY DOCUMENT
9 Jun 2016
4
PRIMARY DOCUMENT
11 Jun 2015
4
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16 Jun 2014
4
PRIMARY DOCUMENT
16 Jan 2014
4
PRIMARY DOCUMENT
2 Dec 2013
4
PRIMARY DOCUMENT
5 Nov 2013
Kramer Robin
(33)
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4
PRIMARY DOCUMENT
17 Feb
4
PRIMARY DOCUMENT
10 Feb
4
PRIMARY DOCUMENT
12 Feb 2025
4
PRIMARY DOCUMENT
10 Feb 2025
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PRIMARY DOCUMENT
9 Dec 2024
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21 Feb 2024
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13 Feb 2024
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PRIMARY DOCUMENT
9 Feb 2024
4
PRIMARY DOCUMENT
31 Jan 2024
4
PRIMARY DOCUMENT
12 Dec 2023
Posner Brian S
(32)
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5
PRIMARY DOCUMENT
27 Jan 2023
4
PRIMARY DOCUMENT
2 Jul 2021
4
PRIMARY DOCUMENT
7 Jun 2021
5
PRIMARY DOCUMENT
9 Feb 2021
4
PRIMARY DOCUMENT
5 Jun 2020
4
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3 Dec 2019
4
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20 Jun 2019
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15 Feb 2019
4
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14 Jun 2018
4
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12 Jun 2017
DORSA CAROLINE
(29)
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PRIMARY DOCUMENT
18 Jun 2025
4
PRIMARY DOCUMENT
5 May 2025
4
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25 Jun 2024
4
PRIMARY DOCUMENT
28 Jun 2023
4
PRIMARY DOCUMENT
17 Jun 2022
4
PRIMARY DOCUMENT
2 Jul 2021
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PRIMARY DOCUMENT
5 Jun 2020
4
PRIMARY DOCUMENT
20 Jun 2019
4
PRIMARY DOCUMENT
14 Jun 2018
4
PRIMARY DOCUMENT
9 Jun 2017
Gregory Ginger
(29)
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PRIMARY DOCUMENT
17 Feb
4
PRIMARY DOCUMENT
10 Feb
4
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12 Feb 2025
4
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10 Feb 2025
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21 Feb 2024
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13 Feb 2024
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9 Feb 2024
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31 Jan 2024
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2 May 2023
4
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22 Feb 2023
Singhal Priya
(28)
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PRIMARY DOCUMENT
17 Feb
4
PRIMARY DOCUMENT
10 Feb
4
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3 Feb
4
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2 Sep 2025
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20 May 2025
4
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12 Feb 2025
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10 Feb 2025
4
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3 Feb 2025
4
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9 Dec 2024
4
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5 Sep 2024
Holtzman Steven H
(27)
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4
PRIMARY DOCUMENT
25 Feb 2016
4
PRIMARY DOCUMENT
17 Feb 2016
4
PRIMARY DOCUMENT
9 Feb 2016
4
PRIMARY DOCUMENT
25 Feb 2015
4
PRIMARY DOCUMENT
18 Feb 2015
4
PRIMARY DOCUMENT
17 Feb 2015
4
PRIMARY DOCUMENT
10 Feb 2015
4
PRIMARY DOCUMENT
2 Feb 2015
4
PRIMARY DOCUMENT
3 Dec 2014
4
PRIMARY DOCUMENT
12 Nov 2014
LEAMING NANCY
(26)
Expand
4
PRIMARY DOCUMENT
2 Jul 2021
4
PRIMARY DOCUMENT
5 Jun 2020
4
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20 Jun 2019
4
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14 Jun 2018
4
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9 Jun 2017
4
PRIMARY DOCUMENT
9 Jun 2016
4
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11 Jun 2015
4
PRIMARY DOCUMENT
16 Jun 2014
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PRIMARY DOCUMENT
12 Mar 2014
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PRIMARY DOCUMENT
13 Jun 2013
Rowinsky Eric K
(26)
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4
PRIMARY DOCUMENT
11 Jun
4
PRIMARY DOCUMENT
18 Jun 2025
4
PRIMARY DOCUMENT
25 Jun 2024
4
PRIMARY DOCUMENT
20 Feb 2024
4
PRIMARY DOCUMENT
28 Jun 2023
4
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17 Jun 2022
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2 Jul 2021
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5 Jun 2020
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20 Jun 2019
4
PRIMARY DOCUMENT
14 Jun 2018
DENNER ALEXANDER J
(26)
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4
PRIMARY DOCUMENT
17 Jun 2022
4
PRIMARY DOCUMENT
2 Jul 2021
4
PRIMARY DOCUMENT
5 Jun 2020
4
PRIMARY DOCUMENT
20 Jun 2019
4
PRIMARY DOCUMENT
2 May 2019
4
PRIMARY DOCUMENT
1 Feb 2019
4
PRIMARY DOCUMENT
14 Jun 2018
4
PRIMARY DOCUMENT
27 Apr 2018
4
Statement of changes in beneficial ownership
30 Nov 2017
4
Statement of changes in beneficial ownership
31 Aug 2017
Gagnon Robert E.
(25)
Expand
4
PRIMARY DOCUMENT
1 Mar 2012
4
PRIMARY DOCUMENT
27 Feb 2012
4
PRIMARY DOCUMENT
16 Feb 2012
4
PRIMARY DOCUMENT
13 Feb 2012
4
PRIMARY DOCUMENT
10 Feb 2012
4
PRIMARY DOCUMENT
8 Dec 2011
4
PRIMARY DOCUMENT
2 Dec 2011
4
PRIMARY DOCUMENT
14 Nov 2011
4
PRIMARY DOCUMENT
4 Nov 2011
4
PRIMARY DOCUMENT
7 Oct 2011
COVINO GREGORY F
(24)
Expand
4
PRIMARY DOCUMENT
5 Mar 2018
4
PRIMARY DOCUMENT
27 Feb 2018
4
PRIMARY DOCUMENT
26 Feb 2018
4
PRIMARY DOCUMENT
20 Feb 2018
4
PRIMARY DOCUMENT
14 Feb 2018
4
PRIMARY DOCUMENT
5 Dec 2017
4
PRIMARY DOCUMENT
2 Mar 2017
4
PRIMARY DOCUMENT
17 Feb 2017
4
PRIMARY DOCUMENT
5 Dec 2016
4
PRIMARY DOCUMENT
2 May 2016
HASLER HANS PETER
(24)
Expand
4
PRIMARY DOCUMENT
26 Feb 2009
4
PRIMARY DOCUMENT
20 Feb 2009
4
PRIMARY DOCUMENT
17 Feb 2009
4
PRIMARY DOCUMENT
13 Feb 2009
4
PRIMARY DOCUMENT
10 Feb 2009
4
PRIMARY DOCUMENT
7 Nov 2008
4
PRIMARY DOCUMENT
4 Nov 2008
4
Statement of changes in beneficial ownership
24 Jul 2008
4
Statement of changes in beneficial ownership
3 Jun 2008
4
Statement of changes in beneficial ownership
10 Apr 2008
Vounatsos Michel
(24)
Expand
4
PRIMARY DOCUMENT
23 Feb 2022
4
PRIMARY DOCUMENT
15 Feb 2022
4
PRIMARY DOCUMENT
14 Feb 2022
4
PRIMARY DOCUMENT
21 Jan 2022
4
PRIMARY DOCUMENT
22 Feb 2021
4
PRIMARY DOCUMENT
17 Feb 2021
4
PRIMARY DOCUMENT
29 Jan 2021
4
PRIMARY DOCUMENT
1 Dec 2020
4
PRIMARY DOCUMENT
19 Feb 2020
4
PRIMARY DOCUMENT
14 Feb 2020
MATSUI CONNIE
(23)
Expand
4
Statement of changes in beneficial ownership
14 Feb 2007
4
Statement of changes in beneficial ownership
8 Feb 2007
4
Statement of changes in beneficial ownership
18 Jan 2007
4
Statement of changes in beneficial ownership
18 Oct 2006
4
Statement of changes in beneficial ownership
15 Sep 2006
4
Statement of changes in beneficial ownership
18 Jul 2006
4
Statement of changes in beneficial ownership
2 May 2006
4
Statement of changes in beneficial ownership
8 Feb 2006
4
Statement of changes in beneficial ownership
5 Jan 2006
4/A
Statement of changes in beneficial ownership (amendment)
5 Jan 2006
ROHN WILLIAM R
(22)
Expand
4
Statement of changes in beneficial ownership
19 Nov 2004
4
Statement of changes in beneficial ownership
19 Nov 2004
4
Statement of changes in beneficial ownership
2 Sep 2004
4/A
Statement of changes in beneficial ownership (amendment)
2 Sep 2004
4
Statement of changes in beneficial ownership
1 Sep 2004
4
Statement of changes in beneficial ownership
4 Jun 2004
4
Statement of changes in beneficial ownership
4 Jun 2004
4
PRIMARY DOCUMENT
4 Mar 2004
4
PRIMARY DOCUMENT
4 Mar 2004
4
PRIMARY DOCUMENT
4 Mar 2004
SHARP PHILIP A
(22)
Expand
4
PRIMARY DOCUMENT
5 Jun 2009
4
Statement of changes in beneficial ownership
22 Jul 2008
4
Statement of changes in beneficial ownership
9 Jul 2008
4
Statement of changes in beneficial ownership
10 Apr 2008
4
Statement of changes in beneficial ownership
10 Apr 2008
4
Statement of changes in beneficial ownership
10 Apr 2008
4
Statement of changes in beneficial ownership
1 Jun 2007
4
Statement of changes in beneficial ownership
30 May 2007
4
Statement of changes in beneficial ownership
30 May 2006
4
Statement of changes in beneficial ownership
10 Jan 2006
MacLean Michael F
(22)
Expand
4
PRIMARY DOCUMENT
4 Oct 2010
4
PRIMARY DOCUMENT
3 Aug 2010
4
PRIMARY DOCUMENT
23 Mar 2010
4/A
PRIMARY DOCUMENT
20 Apr 2010
4
PRIMARY DOCUMENT
25 Feb 2010
4
PRIMARY DOCUMENT
17 Feb 2010
4
PRIMARY DOCUMENT
19 Jan 2010
4
PRIMARY DOCUMENT
3 Nov 2009
4
PRIMARY DOCUMENT
5 Oct 2009
4
PRIMARY DOCUMENT
26 Feb 2009
Izzar Rachid
(22)
Expand
4
PRIMARY DOCUMENT
17 Feb
4
PRIMARY DOCUMENT
10 Feb
4
PRIMARY DOCUMENT
16 Jul 2025
4
PRIMARY DOCUMENT
12 Feb 2025
4
PRIMARY DOCUMENT
11 Feb 2025
4
PRIMARY DOCUMENT
10 Feb 2025
4
PRIMARY DOCUMENT
21 Feb 2024
4
PRIMARY DOCUMENT
13 Feb 2024
4
PRIMARY DOCUMENT
9 Feb 2024
4
PRIMARY DOCUMENT
31 Jan 2024
BIOGEN IDEC MA INC
(21)
Expand
4
Statement of changes in beneficial ownership
9 Nov 2006
3
MAIN DOCUMENT DESCRIPTION
14 Feb 2006
4
MAIN DOCUMENT DESCRIPTION
14 Feb 2006
4
Statement of changes in beneficial ownership
16 Aug 2005
4
Statement of changes in beneficial ownership
12 Aug 2005
4
Statement of changes in beneficial ownership
10 Aug 2005
4
Statement of changes in beneficial ownership
8 Aug 2005
4
Statement of changes in beneficial ownership
4 Aug 2005
4
Statement of changes in beneficial ownership
2 Aug 2005
4
Statement of changes in beneficial ownership
29 Jul 2005
ROSS BRUCE
(21)
Expand
4
PRIMARY DOCUMENT
10 Jun 2010
4
PRIMARY DOCUMENT
25 Jun 2009
4
PRIMARY DOCUMENT
5 Jun 2009
4
Statement of changes in beneficial ownership
23 Jun 2008
4
Statement of changes in beneficial ownership
4 Jun 2008
4
Statement of changes in beneficial ownership
27 Aug 2007
4
Statement of changes in beneficial ownership
16 Aug 2007
4
Statement of changes in beneficial ownership
27 Jul 2007
4
Statement of changes in beneficial ownership
25 Jul 2007
4
Statement of changes in beneficial ownership
1 Jun 2007
DiPietro Kenneth
(21)
Expand
4
PRIMARY DOCUMENT
2 Mar 2017
4
PRIMARY DOCUMENT
17 Feb 2017
4
PRIMARY DOCUMENT
25 Feb 2016
4
PRIMARY DOCUMENT
24 Feb 2016
4
PRIMARY DOCUMENT
17 Feb 2016
4/A
PRIMARY DOCUMENT
9 Feb 2016
4
PRIMARY DOCUMENT
2 Feb 2016
4
PRIMARY DOCUMENT
17 Mar 2015
4
PRIMARY DOCUMENT
25 Feb 2015
4
PRIMARY DOCUMENT
18 Feb 2015
Murphy Nicole
(21)
Expand
4
PRIMARY DOCUMENT
17 Feb
4
PRIMARY DOCUMENT
10 Feb
4
PRIMARY DOCUMENT
12 Feb 2025
4
PRIMARY DOCUMENT
10 Feb 2025
4
PRIMARY DOCUMENT
3 Apr 2024
4
PRIMARY DOCUMENT
21 Feb 2024
4
PRIMARY DOCUMENT
13 Feb 2024
4
PRIMARY DOCUMENT
9 Feb 2024
4
PRIMARY DOCUMENT
31 Jan 2024
4
PRIMARY DOCUMENT
4 Apr 2023
KELLER THOMAS F
(20)
Expand
4/A
Statement of changes in beneficial ownership (amendment)
7 Mar 2008
4
Statement of changes in beneficial ownership
17 Oct 2007
4
Statement of changes in beneficial ownership
27 Aug 2007
4
Statement of changes in beneficial ownership
1 Jun 2007
4
Statement of changes in beneficial ownership
30 May 2007
4
Statement of changes in beneficial ownership
2 Nov 2006
4
Statement of changes in beneficial ownership
5 Sep 2006
4
Statement of changes in beneficial ownership
30 May 2006
4
Statement of changes in beneficial ownership
4 Apr 2006
4
Statement of changes in beneficial ownership
10 Jan 2006
Mulligan Richard
(19)
Expand
4
PRIMARY DOCUMENT
17 Jun 2022
4
PRIMARY DOCUMENT
2 Jul 2021
4
PRIMARY DOCUMENT
5 Jun 2020
4
PRIMARY DOCUMENT
20 Jun 2019
4
PRIMARY DOCUMENT
14 Jun 2018
4
PRIMARY DOCUMENT
9 Jun 2017
4
PRIMARY DOCUMENT
9 Jun 2016
4
PRIMARY DOCUMENT
11 Jun 2015
4
PRIMARY DOCUMENT
16 Jun 2014
4
PRIMARY DOCUMENT
13 Jun 2013
WILLIAMS DOUGLAS E
(18)
Expand
4
PRIMARY DOCUMENT
22 Jun 2015
4
PRIMARY DOCUMENT
25 Feb 2015
4
PRIMARY DOCUMENT
17 Feb 2015
4
PRIMARY DOCUMENT
10 Feb 2015
4
PRIMARY DOCUMENT
2 Feb 2015
4
PRIMARY DOCUMENT
21 Mar 2014
4
PRIMARY DOCUMENT
14 Feb 2014
4
PRIMARY DOCUMENT
11 Feb 2014
4
PRIMARY DOCUMENT
3 Feb 2014
4
PRIMARY DOCUMENT
28 Aug 2013
PAPADOPOULOS STELIOS
(18)
Expand
4
PRIMARY DOCUMENT
17 Jun 2022
4
PRIMARY DOCUMENT
2 Jul 2021
4
PRIMARY DOCUMENT
5 Jun 2020
4
PRIMARY DOCUMENT
20 Jun 2019
4
PRIMARY DOCUMENT
14 Jun 2018
4
PRIMARY DOCUMENT
9 Jun 2017
4
PRIMARY DOCUMENT
9 Jun 2016
4
PRIMARY DOCUMENT
27 Jul 2015
4
PRIMARY DOCUMENT
11 Jun 2015
4
PRIMARY DOCUMENT
16 Jun 2014
YOUNG WILLIAM
(18)
Expand
4
PRIMARY DOCUMENT
9 Jan 2014
4
PRIMARY DOCUMENT
13 Jun 2013
4
PRIMARY DOCUMENT
11 Jun 2012
4
PRIMARY DOCUMENT
29 Sep 2011
4
PRIMARY DOCUMENT
2 Sep 2011
4
PRIMARY DOCUMENT
31 Aug 2011
4
PRIMARY DOCUMENT
2 Jun 2011
4
PRIMARY DOCUMENT
4 Jan 2011
4
PRIMARY DOCUMENT
10 Jun 2010
4
PRIMARY DOCUMENT
11 Jun 2009
MCDONNELL MICHAEL R
(17)
Expand
4
PRIMARY DOCUMENT
12 Feb 2025
4
PRIMARY DOCUMENT
10 Feb 2025
4
PRIMARY DOCUMENT
21 Feb 2024
4
PRIMARY DOCUMENT
13 Feb 2024
4
PRIMARY DOCUMENT
9 Feb 2024
4
PRIMARY DOCUMENT
31 Jan 2024
4
PRIMARY DOCUMENT
6 Sep 2023
4
PRIMARY DOCUMENT
22 Feb 2023
4
PRIMARY DOCUMENT
14 Feb 2023
4
PRIMARY DOCUMENT
10 Feb 2023
GLASSBERG ALAN
(17)
Expand
4
Statement of changes in beneficial ownership
23 Jun 2008
4
Statement of changes in beneficial ownership
1 May 2008
4
Statement of changes in beneficial ownership
1 Jun 2007
4
Statement of changes in beneficial ownership
30 May 2007
4
Statement of changes in beneficial ownership
3 Oct 2006
4
Statement of changes in beneficial ownership
30 May 2006
4
Statement of changes in beneficial ownership
10 Jan 2006
4
Statement of changes in beneficial ownership
5 Jan 2005
4
Statement of changes in beneficial ownership
1 Dec 2004
4/A
Statement of changes in beneficial ownership (amendment)
11 Aug 2004
Hasnain Faheem
(16)
Expand
4
Statement of changes in beneficial ownership
10 Jul 2008
4
Statement of changes in beneficial ownership
10 Apr 2008
4
Statement of changes in beneficial ownership
14 Feb 2008
4
Statement of changes in beneficial ownership
7 Feb 2008
4
Statement of changes in beneficial ownership
2 Nov 2007
4
Statement of changes in beneficial ownership
9 Oct 2007
4/A
Statement of changes in beneficial ownership (amendment)
24 May 2007
4
Statement of changes in beneficial ownership
24 May 2007
4
Statement of changes in beneficial ownership
16 Mar 2007
4
Statement of changes in beneficial ownership
16 Mar 2007
Kingsley Stuart A
(16)
Expand
4
PRIMARY DOCUMENT
25 Feb 2015
4
PRIMARY DOCUMENT
17 Feb 2015
4
PRIMARY DOCUMENT
10 Feb 2015
4
PRIMARY DOCUMENT
12 Mar 2014
4
PRIMARY DOCUMENT
14 Feb 2014
4
PRIMARY DOCUMENT
11 Feb 2014
4
PRIMARY DOCUMENT
3 Feb 2014
4
PRIMARY DOCUMENT
14 Feb 2013
4
PRIMARY DOCUMENT
12 Feb 2013
4
PRIMARY DOCUMENT
5 Feb 2013
Karaboutis Adriana
(15)
Expand
4
PRIMARY DOCUMENT
2 Mar 2017
4
PRIMARY DOCUMENT
17 Feb 2017
4
PRIMARY DOCUMENT
5 Dec 2016
4
PRIMARY DOCUMENT
5 Oct 2016
4
PRIMARY DOCUMENT
4 Oct 2016
4
PRIMARY DOCUMENT
26 Feb 2016
4
PRIMARY DOCUMENT
25 Feb 2016
4
PRIMARY DOCUMENT
24 Feb 2016
4
PRIMARY DOCUMENT
3 Dec 2015
4
PRIMARY DOCUMENT
6 Oct 2015
Guindo Chirfi
(15)
Expand
4
PRIMARY DOCUMENT
23 Feb 2022
4
PRIMARY DOCUMENT
15 Feb 2022
4
PRIMARY DOCUMENT
14 Feb 2022
4
PRIMARY DOCUMENT
21 Jan 2022
4
PRIMARY DOCUMENT
9 Jun 2021
4
PRIMARY DOCUMENT
22 Feb 2021
4
PRIMARY DOCUMENT
17 Feb 2021
4
PRIMARY DOCUMENT
3 Dec 2020
4
PRIMARY DOCUMENT
14 Feb 2020
4
PRIMARY DOCUMENT
3 Dec 2019
KELLOGG PETER N
(12)
Expand
4
Statement of changes in beneficial ownership
22 Mar 2007
4
Statement of changes in beneficial ownership
16 Mar 2007
4
Statement of changes in beneficial ownership
15 Feb 2007
4
Statement of changes in beneficial ownership
14 Feb 2007
4
Statement of changes in beneficial ownership
8 Feb 2007
4
Statement of changes in beneficial ownership
20 Sep 2006
4
Statement of changes in beneficial ownership
15 Sep 2006
4
Statement of changes in beneficial ownership
8 Feb 2006
4
Statement of changes in beneficial ownership
22 Feb 2005
4
MAIN DOCUMENT DESCRIPTION
10 Feb 2004
GOOD MARY L
(12)
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4
Statement of changes in beneficial ownership
30 May 2007
4
Statement of changes in beneficial ownership
30 May 2006
4
Statement of changes in beneficial ownership
2 May 2006
4
Statement of changes in beneficial ownership
10 Jan 2006
4
Statement of changes in beneficial ownership
5 Jan 2005
4
Statement of changes in beneficial ownership
4 Jan 2005
4
Statement of changes in beneficial ownership
5 Oct 2004
4
Statement of changes in beneficial ownership
26 May 2004
4/A
Statement of changes in beneficial ownership (amendment)
8 Nov 2006
4
PRIMARY DOCUMENT
5 Jan 2004
Pawlicki Raymond
(12)
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4
PRIMARY DOCUMENT
25 Nov 2013
4
PRIMARY DOCUMENT
18 Sep 2013
4
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7 May 2013
4
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4 Mar 2013
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26 Feb 2013
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14 Feb 2013
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12 Feb 2013
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7 Feb 2013
4
PRIMARY DOCUMENT
21 Jun 2012
4
PRIMARY DOCUMENT
5 Jun 2012
PICKETT CECIL B
(11)
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PRIMARY DOCUMENT
5 Oct 2009
4/A
PRIMARY DOCUMENT
17 Aug 2009
4
PRIMARY DOCUMENT
9 Apr 2009
4
PRIMARY DOCUMENT
26 Feb 2009
4
PRIMARY DOCUMENT
6 Feb 2009
4
PRIMARY DOCUMENT
6 Oct 2008
4
Statement of changes in beneficial ownership
24 Jul 2008
4
Statement of changes in beneficial ownership
14 Feb 2008
4
Statement of changes in beneficial ownership
3 Oct 2007
4
Statement of changes in beneficial ownership
5 Jan 2007
Artavanis-Tsakonas Spyridon
(11)
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PRIMARY DOCUMENT
5 Apr 2016
4
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25 Feb 2016
4
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24 Feb 2016
4
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17 Feb 2016
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3 Apr 2015
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25 Feb 2015
4
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17 Feb 2015
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16 Dec 2014
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PRIMARY DOCUMENT
3 Apr 2014
4
PRIMARY DOCUMENT
14 Feb 2014
Ehlers Michael D
(11)
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PRIMARY DOCUMENT
4 Jun 2019
4
PRIMARY DOCUMENT
20 Feb 2019
4
PRIMARY DOCUMENT
14 Feb 2019
4
PRIMARY DOCUMENT
27 Sep 2018
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5 Jun 2018
4
PRIMARY DOCUMENT
20 Feb 2018
4
PRIMARY DOCUMENT
14 Feb 2018
4
PRIMARY DOCUMENT
5 Jun 2017
4
PRIMARY DOCUMENT
17 Feb 2017
4
PRIMARY DOCUMENT
2 Jun 2016
Biogen MA Inc.
(11)
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4
Statement of changes in beneficial ownership
28 Sep 2023
4
Statement of changes in beneficial ownership
31 Aug 2022
4
Statement of changes in beneficial ownership
30 Dec 2021
4
Statement of changes in beneficial ownership
28 Dec 2021
4
Statement of changes in beneficial ownership
10 Dec 2021
4
Statement of changes in beneficial ownership
9 Dec 2021
4
Statement of changes in beneficial ownership
3 Dec 2021
4
Statement of changes in beneficial ownership
30 Nov 2021
3
Initial statement of beneficial ownership
11 Jan 2021
3
Initial statement of beneficial ownership
28 Sep 2020
RASTETTER WILLIAM H
(10)
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4
Statement of changes in beneficial ownership
1 Jul 2005
4
Statement of changes in beneficial ownership
22 Feb 2005
4
Statement of changes in beneficial ownership
17 Feb 2005
4
Statement of changes in beneficial ownership
26 May 2004
4
Statement of changes in beneficial ownership
20 May 2004
4
Statement of changes in beneficial ownership
18 May 2004
4
Statement of changes in beneficial ownership
6 May 2004
4
MAIN DOCUMENT DESCRIPTION
19 Mar 2004
4/A
MAIN DOCUMENT DESCRIPTION
9 Mar 2004
4
MAIN DOCUMENT DESCRIPTION
10 Feb 2004
Kowolenko Michael
(10)
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4
Statement of changes in beneficial ownership
27 Jul 2007
4
Statement of changes in beneficial ownership
22 Mar 2007
4
Statement of changes in beneficial ownership
16 Mar 2007
4
Statement of changes in beneficial ownership
15 Feb 2007
4
Statement of changes in beneficial ownership
14 Feb 2007
4
Statement of changes in beneficial ownership
8 Feb 2007
4
Statement of changes in beneficial ownership
20 Sep 2006
4
Statement of changes in beneficial ownership
15 Sep 2006
4
Statement of changes in beneficial ownership
8 Feb 2006
3
Initial statement of beneficial ownership
20 Oct 2005
Mantas Jesus B
(10)
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4
PRIMARY DOCUMENT
11 Jun
4
PRIMARY DOCUMENT
18 Jun 2025
4
PRIMARY DOCUMENT
25 Jun 2024
4
PRIMARY DOCUMENT
28 Jun 2023
4
PRIMARY DOCUMENT
17 Jun 2022
4
PRIMARY DOCUMENT
2 Jul 2021
4
PRIMARY DOCUMENT
10 Feb 2021
4
PRIMARY DOCUMENT
5 Jun 2020
4
PRIMARY DOCUMENT
20 Jun 2019
3
PRIMARY DOCUMENT
20 Jun 2019
HAWKINS WILLIAM A
(9)
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11 Jun
4
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18 Jun 2025
4
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25 Jun 2024
4
PRIMARY DOCUMENT
28 Jun 2023
4
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17 Jun 2022
4
PRIMARY DOCUMENT
2 Jul 2021
4
PRIMARY DOCUMENT
5 Jun 2020
4
PRIMARY DOCUMENT
20 Jun 2019
3
PRIMARY DOCUMENT
20 Jun 2019
BEST LAWRENCE C
(9)
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4
Statement of changes in beneficial ownership
23 Jun 2008
4
Statement of changes in beneficial ownership
1 Jun 2007
4
Statement of changes in beneficial ownership
30 May 2007
4
Statement of changes in beneficial ownership
30 May 2006
4
Statement of changes in beneficial ownership
10 Jan 2006
4
Statement of changes in beneficial ownership
5 Jan 2005
4
PRIMARY DOCUMENT
6 Jan 2004
3
MAIN DOCUMENT DESCRIPTION
14 Nov 2003
4
MAIN DOCUMENT DESCRIPTION
14 Nov 2003
BELZER ALAN
(9)
Expand
4
Statement of changes in beneficial ownership
30 May 2007
4
Statement of changes in beneficial ownership
27 Jul 2006
4
Statement of changes in beneficial ownership
26 Jul 2006
4
Statement of changes in beneficial ownership
30 May 2006
4
Statement of changes in beneficial ownership
10 Jan 2006
4
Statement of changes in beneficial ownership
5 Jan 2005
4
PRIMARY DOCUMENT
5 Jan 2004
4
MAIN DOCUMENT DESCRIPTION
14 Nov 2003
3
MAIN DOCUMENT DESCRIPTION
14 Nov 2003
Koppel Adam
(9)
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4
PRIMARY DOCUMENT
7 Jun 2016
4
Statement of changes in beneficial ownership
6 Jun 2016
4
PRIMARY DOCUMENT
7 Apr 2016
4
PRIMARY DOCUMENT
25 Feb 2016
4
PRIMARY DOCUMENT
24 Feb 2016
4
PRIMARY DOCUMENT
4 Jun 2015
4
PRIMARY DOCUMENT
25 Feb 2015
4
PRIMARY DOCUMENT
3 Jun 2014
3
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15 May 2014
McKenzie Paul
(9)
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5 Mar 2019
4
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20 Feb 2019
4
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14 Feb 2019
4
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5 Mar 2018
4
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20 Feb 2018
4
PRIMARY DOCUMENT
14 Feb 2018
4
PRIMARY DOCUMENT
3 Mar 2017
4
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17 Feb 2017
3
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7 Jul 2016
Keeney Adam
(9)
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5 May
4
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17 Feb
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10 Feb
4
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5 May 2025
4
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10 Feb 2025
4
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3 May 2024
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9 Feb 2024
4
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2 May 2023
3
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25 Apr 2023
Grogan Jane
(8)
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17 Feb
4
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10 Feb
4
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4 Nov 2025
4
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10 Feb 2025
4
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4 Nov 2024
4
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9 Feb 2024
4
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3 Nov 2023
3
PRIMARY DOCUMENT
12 Oct 2023
BUCKNUM THOMAS J
(7)
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4
Statement of changes in beneficial ownership
22 Feb 2005
4
Statement of changes in beneficial ownership
1 Dec 2004
4
Statement of changes in beneficial ownership
26 May 2004
4
Statement of changes in beneficial ownership
5 May 2004
4
MAIN DOCUMENT DESCRIPTION
10 Feb 2004
4
MAIN DOCUMENT DESCRIPTION
14 Nov 2003
3
MAIN DOCUMENT DESCRIPTION
14 Nov 2003
HANNA NABIL
(7)
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5 Apr 2004
4
PRIMARY DOCUMENT
17 Mar 2004
4
MAIN DOCUMENT DESCRIPTION
10 Feb 2004
4/A
PRIMARY DOCUMENT
5 Feb 2004
4
PRIMARY DOCUMENT
9 Jan 2004
4
PRIMARY DOCUMENT
5 Jan 2004
4
PRIMARY DOCUMENT
19 Sep 2003
Freire Maria C
(7)
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11 Jun
4
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18 Jun 2025
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25 Jun 2024
4
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28 Jun 2023
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17 Jun 2022
4
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2 Jul 2021
3
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29 Jun 2021
Viehbacher Christopher
(7)
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4
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17 Feb
4
PRIMARY DOCUMENT
10 Feb
4
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3 Dec 2025
4
PRIMARY DOCUMENT
10 Feb 2025
4
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9 Feb 2024
4
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5 Dec 2022
3
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21 Nov 2022
Galdes Alphonse
(7)
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21 Jan 2022
4
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22 Feb 2021
4
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17 Feb 2021
4
PRIMARY DOCUMENT
29 Jan 2021
4
PRIMARY DOCUMENT
19 Feb 2020
4
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14 Feb 2020
3
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26 Sep 2019
Godbout Sean
(7)
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5 Oct
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3 Apr
4
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17 Feb
4
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10 Feb
4
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6 Oct 2025
4
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3 Apr 2025
3
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10 Mar 2025
CAPELLO JEFFREY D
(6)
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14 Feb 2020
4
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6 Jan 2020
4
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14 Feb 2019
4
PRIMARY DOCUMENT
4 Jan 2019
4
PRIMARY DOCUMENT
4 Jan 2018
3
PRIMARY DOCUMENT
18 Dec 2017
Gilman Michael
(6)
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4
Statement of changes in beneficial ownership
22 Feb 2005
4
Statement of changes in beneficial ownership
3 Jan 2005
4
Statement of changes in beneficial ownership
13 Dec 2004
4
Statement of changes in beneficial ownership
15 Sep 2004
4
Statement of changes in beneficial ownership
2 Aug 2004
3
Initial statement of beneficial ownership
20 May 2004
Granata Francesco
(5)
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PRIMARY DOCUMENT
3 Feb 2012
4
PRIMARY DOCUMENT
1 Jul 2011
4
PRIMARY DOCUMENT
11 Feb 2011
4
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3 Feb 2011
3
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10 Aug 2010
Karp Daniel
(5)
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4
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14 Feb 2020
4
PRIMARY DOCUMENT
5 Jul 2019
4
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14 Feb 2019
4
PRIMARY DOCUMENT
3 Jul 2018
3
PRIMARY DOCUMENT
19 Jun 2018
LANGER SUSAN
(5)
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11 Jun
4
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18 Jun 2025
4
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25 Jun 2024
3
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28 Jun 2023
4
PRIMARY DOCUMENT
28 Jun 2023
DEKKERS MARIJN E
(4)
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4
PRIMARY DOCUMENT
5 Jun 2009
4
Statement of changes in beneficial ownership
23 Jun 2008
4
Statement of changes in beneficial ownership
1 Jun 2007
3
Initial statement of beneficial ownership
1 Jun 2007
Patolawala Monish D
(4)
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4
PRIMARY DOCUMENT
11 Jun
4
PRIMARY DOCUMENT
18 Jun 2025
4
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25 Jun 2024
3
PRIMARY DOCUMENT
9 Jan 2024
Minor Lloyd
(4)
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5 Aug
4
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11 Jun
4
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18 Jun 2025
3
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7 Oct 2024
JONES WILLIAM D /CA/
(3)
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17 Jun 2022
4
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2 Jul 2021
3
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29 Jun 2021
LYTTON MICHAEL
(3)
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4 Mar 2010
4
PRIMARY DOCUMENT
25 Feb 2010
3
PRIMARY DOCUMENT
22 Apr 2009
Pangalos Menelas N
(3)
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4
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11 Jun
4
PRIMARY DOCUMENT
18 Jun 2025
3
PRIMARY DOCUMENT
7 Jan 2025
GREGOIRE SYLVIE L
(2)
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3
MAIN DOCUMENT DESCRIPTION
14 Nov 2003
4
MAIN DOCUMENT DESCRIPTION
14 Nov 2003
RODRIGUEZ EDWARD
(2)
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PRIMARY DOCUMENT
3 Sep 2003
3/A
PRIMARY DOCUMENT
4 Sep 2003
Kress Jean-Paul
(2)
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5 Jul 2017
3
PRIMARY DOCUMENT
20 Jun 2017
Parini Michael
(2)
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4
PRIMARY DOCUMENT
3 Sep
3
PRIMARY DOCUMENT
12 Aug
Cook Anne Marie
(1)
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3
Initial statement of beneficial ownership
18 Mar 2005
Arner Raymond G
(1)
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3
Initial statement of beneficial ownership
27 Jun 2005
≥5% Ownership
FMR LLC
(30)
Expand
SC 13G/A
Biogen Inc.
6 Aug
SC 13G/A
Biogen Inc.
5 Jun
SC 13G/A
Biogen Inc.
6 May
SC 13G
Biogen Inc.
5 Feb
SC 13G/A
Biogen Inc.
14 Feb 2017
SC 13G/A
Biogen Inc.
12 Feb 2016
SC 13G/A
Biogen Idec Inc.
13 Feb 2015
SC 13G/A
Biogen Idec Inc.
14 Feb 2014
SC 13G/A
Biogen Idec Inc.
14 Feb 2013
SC 13G/A
Biogen Idec Inc.
10 Aug 2012
BIOGEN INC.
(28)
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SC 13D/A
Apellis Pharmaceuticals, Inc.
14 May
SC 13D
Apellis Pharmaceuticals, Inc.
6 Apr
SC 13D/A
Sage Therapeutics, Inc.
30 Jul 2025
SC 13D/A
Sage Therapeutics, Inc.
21 Jul 2025
SC 13D
Sage Therapeutics, Inc.
10 Jan 2025
SC 13G/A
Denali Therapeutics Inc.
7 Nov 2024
SC 13G/A
Sangamo Therapeutics, Inc
16 Aug 2024
SC 13G/A
Denali Therapeutics Inc.
12 Feb 2024
SC 13G/A
Sangamo Therapeutics, Inc
12 Feb 2024
SC 13D/A
Reata Pharmaceuticals Inc
28 Sep 2023
PRIMECAP MANAGEMENT CO/CA/
(27)
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SC 13G/A
Biogen Inc.
13 Nov 2025
SC 13G/A
Biogen Inc.
12 Feb 2024
SC 13G/A
Biogen Inc.
9 Feb 2023
SC 13G/A
Biogen Inc.
10 Feb 2022
SC 13G/A
Biogen Inc.
12 Feb 2021
SC 13G/A
Biogen Inc.
9 Dec 2020
SC 13G/A
Biogen Inc.
12 Feb 2020
SC 13G/A
Biogen Inc.
8 Feb 2019
SC 13G/A
Biogen Inc.
12 Feb 2016
SC 13G/A
Biogen Idec Inc.
13 Feb 2015
BlackRock Inc.
(17)
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SC 13G/A
Biogen Inc.
7 Aug 2024
SC 13G/A
Biogen Inc.
24 Jan 2024
SC 13G/A
Biogen Inc.
24 Jan 2023
SC 13G/A
Biogen Inc.
7 Mar 2022
SC 13G
Biogen Inc.
8 Feb 2022
SC 13G/A
Biogen Inc.
29 Jan 2021
SC 13G/A
Biogen Inc.
5 Feb 2020
SC 13G/A
Biogen Inc.
4 Feb 2019
SC 13G/A
Biogen Inc.
29 Jan 2018
SC 13G/A
Biogen Inc.
19 Jan 2017
VANGUARD GROUP INC
(14)
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SC 13G/A
Biogen Inc.
26 Mar
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Biogen Inc.
12 Nov 2024
SC 13G/A
Biogen Inc.
4 Nov 2024
SC 13G/A
Biogen Inc.
12 Feb 2024
SC 13G/A
Biogen Inc.
12 Feb 2024
SC 13G/A
Biogen Inc.
9 Feb 2023
SC 13G/A
Biogen Inc.
9 Feb 2022
SC 13G/A
Biogen Inc.
10 Feb 2021
SC 13G/A
Biogen Inc.
12 Feb 2020
SC 13G/A
Biogen Inc.
11 Feb 2019
VANGUARD CHESTER FUNDS
(11)
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SC 13G/A
Biogen Idec Inc.
4 Feb 2014
SC 13G/A
Biogen Idec Inc.
14 Feb 2013
SC 13G
Biogen Idec Inc.
30 Jan 2013
SC 13G/A
Biogen Idec Inc.
27 Jan 2012
SC 13G
Biogen Idec Inc.
10 Feb 2011
SC 13G/A
Biogen Idec Inc.
27 Feb 2008
SC 13G/A
Biogen Idec Inc.
14 Feb 2008
SC 13G/A
Biogen Idec Inc
14 Feb 2007
SC 13G/A
Biogen Idec Inc
13 Feb 2006
SC 13G/A
Biogen Idec Inc
14 Feb 2005
CITIGROUP INC
(9)
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SC 13G/A
Biogen Idec Inc
5 Jan 2006
SC 13G/A
Biogen Idec Inc
9 Feb 2005
SC 13G/A
Biogen Idec Inc
11 Feb 2004
SC 13G/A
Idec Pharmaceuticals Corp / De
4 Feb 2003
SC 13G/A
Idec Pharmaceuticals Corp / De
24 Jan 2002
SC 13G/A
Idec Pharmaceuticals Corp / De
16 Feb 2001
SC 13G/A
Idec Pharmaceuticals Corp / De
8 Feb 2000
SC 13G/A
Idec Pharmaceuticals Corp / De
22 Jan 1999
SC 13G
Idec Pharmaceuticals Corp / De
6 Feb 1998
Clearbridge Advisors, LLC
(7)
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SC 13G/A
Biogen Idec Inc.
14 Feb 2012
SC 13G/A
Biogen Idec Inc.
11 Feb 2011
SC 13G/A
Biogen Idec Inc.
12 Feb 2010
SC 13G/A
Biogen Idec Inc.
13 Feb 2009
SC 13G/A
Biogen Idec Inc.
14 Feb 2008
SC 13G/A
Biogen Idec Inc
6 Feb 2007
SC 13G
Biogen Idec Inc
10 Jan 2006
AMVESCAP PLC \GA\
(6)
Expand
SC 13G/A
Idec Pharmaceuticals Corp / De
10 Jan 2001
SC 13G/A
Idec Pharmaceuticals Corp / De
4 Feb 2000
SC 13G/A
Idec Pharmaceuticals Corp / De
13 Oct 1998
SC 13G/A
Idec Pharmaceuticals Corp / De
10 Sep 1998
SC 13G/A
Idec Pharmaceuticals Corp / De
12 Feb 1998
SC 13G
Idec Pharmaceuticals Corp / Ca
14 Feb 1997
WELLINGTON MANAGEMENT CO LLP
(6)
Expand
SC 13G/A
Biogen Idec Inc
12 Feb 2004
SC 13G
Idec Pharmaceuticals Corp / De
10 Mar 2003
SC 13G
Idec Pharmaceuticals Corp / De
12 Feb 2003
SC 13G/A
Idec Pharmaceuticals Corp / De
1 Dec 2000
SC 13G/A
Idec Pharmaceuticals Corp / De
11 Feb 2000
SC 13G
Idec Pharmaceuticals Corp / De
8 Feb 1999
ICAHN CARL C
(6)
Expand
SC 13D/A
Biogen Idec Inc.
22 Jun 2011
SC 13D/A
Biogen Idec Inc.
23 May 2011
SC 13D/A
Biogen Idec Inc.
22 Mar 2010
SC 13D/A
Biogen Idec Inc.
28 Jan 2010
SC 13D/A
Biogen Idec Inc.
6 Feb 2009
SC 13D
Biogen Idec Inc.
11 Aug 2008
GENENTECH INC
(5)
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SC 13D/A
Idec Pharmaceuticals Corp / De
14 Feb 2001
SC 13D/A
Idec Pharmaceuticals Corp / De
19 Jul 2000
SC 13D/A
Idec Pharmaceuticals Corp / De
21 Mar 2000
SC 13D/A
Idec Pharmaceuticals Corp / De
13 Feb 1998
SC 13D
Idec Pharmaceuticals Corp / Ca
21 May 1996
MORGAN STANLEY
(5)
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SC 13G/A
Idec Pharmaceuticals Corp / De
13 Feb 2003
SC 13G/A
Idec Pharmaceuticals Corp / De
12 Feb 2002
SC 13G
Idec Pharmaceuticals Corp / De
7 Feb 2001
SC 13G/A
Idec Pharmaceuticals Corp / De
5 Feb 1999
SC 13G
Idec Pharmaceuticals Corp / De
17 Feb 1998
SMITHKLINE BEECHAM CORP
(4)
Expand
SC 13D/A
Idec Pharmaceuticals Corp / Ca
17 Mar 1997
SC 13D/A
Idec Pharmaceuticals Corp / Ca
3 Mar 1997
SC 13D/A
Idec Pharmaceuticals Corp / Ca
13 Dec 1996
SC 13D/A
Idec Pharmaceuticals Corp / Ca
26 Sep 1996
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(4)
Expand
SC 13G/A
Biogen Idec Inc.
3 Feb 2009
SC 13G
Biogen Idec Inc.
5 Feb 2008
SC 13G
Biogen Idec Inc.
5 Feb 2008
SC 13G
Biogen Idec Inc.
5 Feb 2008
FEINBERG LARRY N
(4)
Expand
SC 13G/A
Idec Pharmaceuticals Corp / De
12 Feb 1999
SC 13G
Idec Pharmaceuticals Corp / De
4 Mar 1998
SC 13D/A
Idec Pharmaceuticals Corp / De
24 Jul 1997
SC 13D
Idec Pharmaceuticals Corp / Ca
10 Mar 1997
CAPITAL RESEARCH & MANAGEMENT CO
(3)
Expand
SC 13G/A
Biogen Idec Inc
12 Feb 2007
SC 13G/A
Biogen Idec Inc
10 Feb 2006
SC 13G
Biogen Idec Inc
11 Feb 2005
Capital Research Global Investors
(3)
Expand
SC 13G/A
Biogen Idec Inc.
12 Feb 2013
SC 13G/A
Biogen Idec Inc.
14 Feb 2012
SC 13G
Biogen Idec Inc.
9 Feb 2011
PRICE T ROWE ASSOCIATES INC /MD/
(2)
Expand
SC 13G/A
Biogen Inc.
11 Feb 2016
SC 13G
Biogen Idec Inc.
12 Feb 2015
STATE STREET CORP
(2)
Expand
SC 13G
Biogen Inc.
10 Nov 2025
SC 13G
Biogen Inc.
16 Oct 2024
CAPITAL GROUP COMPANIES INC ET AL
(2)
Expand
SC 13G
Idec Pharmaceuticals Corp / De
11 Feb 1998
SC 13G
Idec Pharmaceuticals Corp / Ca
12 Feb 1997
GOLDMAN SACHS ASSET MANAGEMENT LP
(2)
Expand
SC 13G/A
Biogen Idec Inc.
11 Feb 2011
SC 13G
Biogen Idec Inc.
12 Feb 2010
AMERICAN CENTURY INVESTMENT MANAGEMENT INC
(1)
Expand
SC 13G/A
Idec Pharmaceuticals Corp / De
16 Feb 1999
VANGUARD/WINDSOR FUNDS INC
(1)
Expand
SC 13G/A
Idec Pharmaceuticals Corp / De
10 Feb 2000
VANGUARD SPECIALIZED PORTFOLIOS INC
(1)
Expand
SC 13G
Idec Pharmaceuticals Corp / De
11 Feb 1999
AMERICAN CENTURY COMPANIES INC
(1)
Expand
SC 13G
Idec Pharmaceuticals Corp / De
4 Feb 1998
ML VENTURE PARTNERS II LP
(1)
Expand
SC 13D/A
Idec Pharmaceuticals Corp / Ca
7 May 1997
AMERINDO INVESTMENT ADVISORS INC
(1)
Expand
SC 13G/A
Idec Pharmaceuticals Corp / Ca
10 Jul 1996
BlackRock, Inc.
(1)
Expand
SC 13G/A
Biogen Inc.
17 Apr 2025
VANGUARD CAPITAL MANAGEMENT LLC
(1)
Expand
SC 13G
Biogen Inc.
29 Apr
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