| SUBSIDIARY | STATE OR OTHER JURISDICTION OF INCORPORATION OR ORGANIZATION | |||||||
| Biogen Foundation Inc. | Massachusetts | |||||||
| Biogen MA Inc. | Massachusetts | |||||||
| Biogen Realty Corporation | Massachusetts | |||||||
| Biogen Realty Limited Partnership | Massachusetts | |||||||
| Biogen U.S. Corporation | Massachusetts | |||||||
| Biogen U.S. Limited Partnership | Massachusetts | |||||||
| Biogen (RTP) Realty LLC | Delaware | |||||||
| Biogen Chesapeake LLC | Delaware | |||||||
| Biogen Digital Health Inc. | Delaware | |||||||
| Biogen Digital Health Global LLC | Delaware | |||||||
| Biogen Holding I LLC | Delaware | |||||||
| Biogen Holding II LLC | Delaware | |||||||
| Biogen OUS Holding Inc. | Delaware | |||||||
| Biogen Manufacturing Holding LLC | Delaware | |||||||
| Biogen New Ventures Inc. | Delaware | |||||||
| Biogen SRO Inc. | Delaware | |||||||
| Biogen Therapeutics Inc. | Delaware | |||||||
| Biogen U.S. Pacific LLC | Delaware | |||||||
| Biogen U.S. West Corporation | Delaware | |||||||
| Conforma Therapeutics Corporation | Delaware | |||||||
| Stromedix, Inc. | Delaware | |||||||
| Nightstar, Inc. | Delaware | |||||||
| Reata Pharmaceuticals Global, Inc. | Delaware | |||||||
| Reata Pharmaceuticals Holdings, LLC. | Delaware | |||||||
| Reata Pharmaceuticals, Inc. | Delaware | |||||||
| Biogen (Argentina) SRL | Argentina | |||||||
| Biogen Australia PTY Ltd | Australia | |||||||
| Reata Australia PTY Ltd | Australia | |||||||
| Biogen Austria GmbH | Austria | |||||||
| Biogen Belgium N.V./S.A. | Belgium | |||||||
| Biogen International Holding Limited | Bermuda | |||||||
| Biogen (Bermuda) Technologies Ltd. | Bermuda | |||||||
| Biogen Brasil Produtos Farmaceuticos LTDA | Brazil | |||||||
| Biogen Canada Inc. | Canada | |||||||
| Biogen Chile SpA | Chile | |||||||
| Biogen Biotechnology (Shanghai) Co., Ltd | China | |||||||
| BIIB Colombia S.A.S. | Colombia | |||||||
| Biogen Pharma d.o.o. | Croatia | |||||||
| Biogen (Czech Republic) s.r.o. | Czech Republic | |||||||
| Biogen (Denmark) A/S | Denmark | |||||||
| SUBSIDIARY | STATE OR OTHER JURISDICTION OF INCORPORATION OR ORGANIZATION | |||||||
| Biogen Estonia OU | Estonia | |||||||
| Biogen Finland OY | Finland | |||||||
| Biogen France S.A.S. | France | |||||||
| Reata France S.A.S. | France | |||||||
| Biogen GmbH | Germany | |||||||
| Reata Germany GmbH | Germany | |||||||
| Biogen Hong Kong Limited | Hong Kong | |||||||
| Biogen Hungary KFT | Hungary | |||||||
| Biogen Idec Biotech India Pvt. Ltd. | India | |||||||
| Biogen Capability Center India Private Limited | India | |||||||
| Biogen Idec (Ireland) Ltd. | Ireland | |||||||
| Nightstar Europa Limited | Ireland | |||||||
| Reata Ireland Limited | Ireland | |||||||
| Biogen Italia S.R.L. | Italy | |||||||
| Reata Italy S.R.L. | Italy | |||||||
| Biogen Japan Ltd. | Japan | |||||||
| Biogen Korea LLC | Korea | |||||||
| Biogen Latvia SIA | Latvia | |||||||
| Biogen Lithuania UAB | Lithuania | |||||||
| Biogen Luxembourg Holding S.a.r.l. | Luxembourg | |||||||
| Biogen Mexico S. de R.L. de C.V. | Mexico | |||||||
| Biogen NZ Biopharma Ltd. | New Zealand | |||||||
| Biogen Norway AS | Norway | |||||||
| Biogen Poland Sp. z.o.o. | Poland | |||||||
| Biogen Portugal Sociedade Farmaceutica, Unipessoal Lda. | Portugal | |||||||
| Biogen Regional Headquarters LLC | Saudi Arabia | |||||||
| Biogen Slovakia s.r.o. | Slovak Republic | |||||||
| Biogen Pharma, farmacevtska in biotehnoloska druzba, d.o.o. | Slovenia | |||||||
| Biogen Spain, S.L. | Spain | |||||||
| Biogen Sweden AB | Sweden | |||||||
| Biogen Digital Health International GmbH | Switzerland | |||||||
| Biogen International GmbH | Switzerland | |||||||
| Biogen International Neuroscience GmbH | Switzerland | |||||||
| Biogen Management Services GmbH | Switzerland | |||||||
| Biogen Swiss Manufacturing GmbH | Switzerland | |||||||
| Biogen Switzerland AG | Switzerland | |||||||
| Eidetica Biopharma GmbH | Switzerland | |||||||
| Reata Swiss International GmbH | Switzerland | |||||||
| Biogen Taiwan Limited | Taiwan | |||||||
| Biogen Turkey Ilac Ticaret Limited Sirketi | Turkey | |||||||
| Biogen B.V. | The Netherlands | |||||||
| Biogen Netherlands B.V. | The Netherlands | |||||||
| Biogen Idec Limited | United Kingdom | |||||||
| Biogen Idec Research Ltd. | United Kingdom | |||||||
| Convergence Pharmaceuticals Limited | United Kingdom | |||||||
| Convergence Pharmaceuticals Holdings Ltd. | United Kingdom | |||||||
| Old Convergence Pharmaceuticals Limited | United Kingdom | |||||||
| Reata U.K. Limited | United Kingdom | |||||||
| SUBSIDIARY | STATE OR OTHER JURISDICTION OF INCORPORATION OR ORGANIZATION | |||||||
| Silver Acquisition Co. Ltd. | United Kingdom | |||||||
| Nightstar Therapeutics Limited | United Kingdom | |||||||
| NightstaRx Limited | United Kingdom | |||||||
| Tungsten Bidco Limited | United Kingdom | |||||||
| Biogen Idec Uruguay SA | Uruguay | |||||||