Exhibit 21
BIOGEN IDEC INC
The following is a list of subsidiaries of Biogen Idec Inc. as of December 31, 2008, omitting some
subsidiaries which, considered in the aggregate, would not constitute a significant subsidiary.
| STATE OR OTHER JURISDICTION OF | ||
| SUBSIDIARY | INCORPORATION OR ORGANIZATION | |
Biogen Idec MA Inc.
|
Massachusetts | |
Biogen Idec Holding I Inc.
|
Delaware | |
Biogen Idec Holding II Inc.
|
Delaware | |
Biogen Idec Realty Corporation
|
Massachusetts | |
Biogen Idec Realty Limited Partnership
|
Massachusetts | |
Biogen Idec U.S. Corporation
|
Massachusetts | |
Biogen Idec U.S. Limited Partnership
|
Massachusetts | |
Biogen Idec Realty LLC
|
Delaware | |
The Biogen Idec Foundation Inc.
|
Massachusetts | |
Biogen Idec U.S. Pacific LLC
|
Delaware | |
Biogen Idec U.S. West Corporation
|
Delaware | |
Biogen Idec Nobel Research Center, LLC
|
Delaware | |
Conforma Therapeutics Corporation
|
Delaware | |
Syntonix Pharmaceuticals, Inc.
|
Delaware | |
Biogen Idec Canada Inc.
|
Delaware | |
Biogen Idec SRO, Inc.
|
Delaware | |
Biogen Idec (Argentina) SRL
|
Argentina | |
Biogen Idec Australia PTY Ltd
|
Australia | |
Biogen Idec Austria GmbH
|
Austria | |
Biogen Idec Belgium N.V.
|
Belgium | |
Biogen Idec Brazil Produtos Farmaceuticos LTDA
|
Brazil | |
Biogen Idec (Czech Republic) s.r.o.
|
Czech Republic | |
Biogen Idec (Denmark) A/S
|
Denmark | |
Biogen Idec (Denmark) Manufacturing ApS
|
Denmark | |
Biogen Idec Holding APS
|
Denmark | |
Biogen Idec Finland OY
|
Finland | |
Biogen Idec France S.A.S.
|
France | |
Biogen Idec GmbH
|
Germany | |
Biogen Idec Biotech India Pvt. Ltd.
|
India | |
Biogen Idec (Ireland) Ltd.
|
Ireland | |
Biogen Idec Japan Ltd.
|
Japan | |
Biogen Idec Mexico S. DE R.L. DE C.V.
|
Mexico | |
Biogen Idec B.V.
|
The Netherlands | |
Biogen Idec International B.V.
|
The Netherlands | |
Biogen Idec Norway AS
|
Norway | |
Biogen Idec NZ Ltd.
|
New Zealand | |
Biogen Idec Portugal Sociedade Farmaceutica, Unipessoal, Lda.
|
Portugal | |
Biogen Idec Iberia, S.L.
|
Spain | |
Biogen Idec (Slovak Republic) s.r.o.
|
Slovak Republic | |
Biogen Idec promet s farmacevtskimi in biotehnoloskimi proizvodi d.o.o
|
Slovenia | |
Biogen Idec Sweden AB
|
Sweden | |
Biogen Idec International GmbH
|
Switzerland | |
Eidetica Biopharma GmbH
|
Switzerland | |
Biogen Idec Ltd.
|
UK | |
Biogen-Dompe AG
|
Switzerland | |
Biogen-Dompe SRL
|
Italy | |
Biotech Manufacturing CV
|
The Netherlands |