Orbital Reports Growth in Revenues and Operating Results

Dulles, Va., February 14, 2013— Orbital Sciences Corporation today reported its fourth quarter and full year 2012 financial results.  Fourth quarter 2012 revenues were $354.6 million, up 6% compared to $335.5 million in the fourth quarter of 2011.  Fourth quarter 2012 operating income was $31.3 million, an increase of 41% compared to $22.2 million in the fourth quarter of 2011.