Contact Information

Shareholders may communicate directly to the Board of Directors or its non-employee directors by writing to:

Lead Independent Director
Orbital Sciences Corporation
21839 Atlantic Blvd.
Dulles, VA 20166
Attn: General Counsel

The Lead Independent Director will review all communications and report on them to the full Board or the non-employee directors as appropriate. Complaints or concerns regarding Orbital's accounting, internal accounting controls or auditing matters will be referred to the Audit and Finance Committee and will be investigated in the ordinary course by the committee or its designee.