Investor FAQs

What exchange is Biogen listed on and what is your stock symbol?

Biogen is listed on the Nasdaq Stock Market under the ticker symbol BIIB.

Where is Biogen incorporated?

Biogen is incorporated in the State of Delaware.

Where are Biogen’s headquarters?

Biogen is headquartered in Cambridge, Massachusetts.

Who are Biogen’s independent auditors?

Our independent auditors are PricewaterhouseCoopers LLP in Boston, Massachusetts.

Is Biogen involved in corporate citizenship?

Yes, please click here for more information.

How do I request a copy of the Annual Report?

Please click here to request a copy of the annual report.

Can I purchase shares directly through the company?

No, Biogen does not a have a direct stock purchase plan.

Does Biogen have a dividend reinvestment plan (DRIP)?

Biogen does not pay a dividend therefore does not offer a DRIP.

How do I replace a lost stock certificate or notify for a change of address?

Please contact Biogen’s transfer agent:

Computershare

By Regular Mail:

PO Box 43006, Providence, RI 02940-3078

By Courier Delivery:

150 Royall St., Suite 101, Canton, MA 02021

Toll Free: 1-877-282-1168

Direct: 1-781-575-2879

Computershare's website

How do I keep my account active to avoid potential escheatment of my Biogen stock?

Normal activities such as updating your address or voting your proxy will keep your account active. Accessing your account online, using Computershare's automated phone system, or speaking to a Computershare customer service representative may also keep your account active for purposes of state abandoned property laws.

Computershare

By Regular Mail:

PO Box 43006, Providence, RI 02940-3078

By Courier Delivery:

150 Royall St., Suite 101, Canton, MA 02021

Toll Free: 1-877-282-1168

Direct: 1-781-575-2879

Computershare's website

Who can I call if I have further questions?

Biogen’s Investor Relations department can be reached at 1-781-464-2442. If your question is merger-transaction specific (e.g. you lost your Biogen shares), please call Computershare at:

Toll Free: 1-877-282-1168

Direct: 1-781-575-2879

Who do I contact if I never received shares in Bioverativ upon the spin-off?

Please contact your stock broker directly (Fidelity, Charles Schwab, etc.) if you feel you were entitled to shares in Bioverativ but did not receive them.

How do I value the Bioverativ distribution for tax purposes?

We cannot provide individual tax advice. Please click here for a copy of the Form 8937 that we filed with the IRS related to the cost basis following the spin-off.

Who do I contact if I have questions about my Nightstar Therapeutics shares?

Please contact:

Katy Fry

Computershare

Project Manager > Corporate Actions

T +44 (0)117 332 9101

M +44 (0)746 773 4609

F +44 (0)370 703 6113

The Pavilions, Bridgwater Road, Bristol BS13 8AE, United Kingdom

www.computershare.com