8-KRegulation FDExhibits & Filings

BIOGEN INC. 8-K Report, Regulation FD Disclosure (Jun 18, 2007)

Filed June 18, 2007For Securities:BIIB

Summary

Biogen Idec Inc. (BIIB) filed a Form 8-K on June 18, 2007, to disclose an update on TYSABRI® (natalizumab) utilization and safety. This information was presented via a PowerPoint slide at a symposium during the European Neurological Society meeting in Rhodes, Greece. The filing serves as a Regulation FD disclosure, meaning the information is being made public to ensure all investors have access to it simultaneously.

Key Highlights

  • 1Biogen Idec presented an update on TYSABRI® (natalizumab) at the European Neurological Society meeting.
  • 2The update focused on the utilization and safety profile of TYSABRI®.
  • 3The information was disseminated through a PowerPoint slide presented at a symposium.
  • 4This filing is classified as a Regulation FD disclosure, ensuring broad public access to the information.
  • 5The exhibit furnished is the actual PowerPoint slide detailing the TYSABRI® update.

Frequently Asked Questions

The primary purpose of this 8-K filing is to publicly disclose an update regarding the utilization and safety of TYSABRI® (natalizumab), presented at a medical symposium.

The update on TYSABRI® was presented at a symposium during the European Neurological Society meeting in Rhodes, Greece.

The filing indicates an update on the utilization and safety of TYSABRI® (natalizumab). The detailed information is contained within the furnished PowerPoint slide (Exhibit 99.1).

This filing is a Regulation FD disclosure because Biogen Idec is publicly disseminating material information (the TYSABRI® update) to ensure that all investors have access to it simultaneously, rather than selectively disclosing it.