Biogen Idec is committed to sound principles of corporate governance and believes that such principles are critical to our success as a company and to obtaining the trust and confidence of our stockholders, employees, customers, distributors and suppliers. Here we share with you the composition of our Board of Directors and its committees, the guidelines and charters that guide our Board committees, our code of business conduct and other important governance documents. We also offer you the opportunity to report complaints and concerns about the company to our Board of Directors.

On June 8, 2010, our Board of Directors approved a revised Code of Business Conduct which became effective October 1, 2010. The Code has been revised to, among other things, reflect our expanded global footprint, adapt to a changing regulatory environment, dovetail with our corporate core values, highlight our corporate social responsibility initiatives, enhance the perception of accountability and responsibility, and improve the overall accessibility of the principals underlying Biogen Idec's commitment to maintain the highest level of integrity and ethical behavior in the conduct of our business worldwide.

On June 1, 2011, our Code of Business Conduct was amended to provide that any waivers of the Code for directors or executive officers must be approved by our Board of Directors.

Committee Charters Corporate Governance Committee Compensation and Management Development Committee Finance and Audit Committee Science and Technology Committee

Governance Documents   Articles of Incorporation   By-Laws   Corporate Governance Principles   Finance and Audit Committee Practices   Comprehensive Compliance Program