THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Orbital Sciences Corporation (ORB)

3/21/2006 Proxy Information

Scott L. Webster is a co-founder of Orbital. Mr. Webster served as Senior Vice President, Special Projects of Orbital from May 2001 until his retirement in July 2002. From 1998 until April 2001, Mr. Webster was Chairman of the Board and Chief Executive Officer of ORBCOMM Global, L.P., a satellite services company formerly affiliated with Orbital. From 1993 to 1997, Mr. Webster served in various consulting capacities with Orbital. He served as President of OrbitalŐs Space Data Division from 1990 until 1993, and Executive Vice President of that Division from 1989 to 1990. Mr. Webster was OrbitalŐs Senior Vice President of Marketing and Vice President of Marketing from OrbitalŐs inception in 1982 until 1989.

3/22/2005 Proxy Information

Scott L. Webster is a co-founder of Orbital. Mr. Webster served as Senior Vice President, Special Projects of Orbital from May 2001 until his retirement in July 2002. From 1998 until April 2001, Mr. Webster was Chairman of the Board and Chief Executive Officer of ORBCOMM Global, L.P., a satellite services company formerly affiliated with Orbital. From 1993 to 1997, Mr. Webster served in various consulting capacities with Orbital. He served as President of OrbitalŐs Space Data Division from 1990 until 1993, and Executive Vice President of that Division from 1989 to 1990. Mr. Webster was OrbitalŐs Senior Vice President of Marketing and Vice President of Marketing from OrbitalŐs inception in 1982 until 1989.

3/25/2004 Proxy Information

Scott L. Webster is a co-founder of Orbital Sciences Corporation. He served as Senior Vice President of Special Projects of Orbital Sciences Corporation from May 2001 until his retirement in July 2002. From 1998 until April 2001, he was Chairman and Chief Executive Officer of ORBCOMM Global, L. P., a satellite services company formerly affiliated with Orbital.

3/24/2003 Proxy Information

No related party transactions or special relationships reported for this company. Director relationships marked "Outside Related" at this firm will most often be former executives of the company. Additional information regarding these relationships will be added during our regular updates.