ViaSat Litigation Update

MacDonald, Dettwiler and Associates Ltd. (“MDA” or the “Company”) (TSX:MDA), a global communications and information company, today announced that in an order issued August 8, 2014, the federal court hearing ViaSat Communications, Inc.’s (ViaSat) lawsuit against Space Systems/Loral, LLC (SSL) vacated all damages the jury awarded to ViaSat, finding that the jury award was a “miscarriage of justice.” The Court ordered a new trial on damages.

The Court deferred any ruling on ViaSat’s motion for a permanent injunction, which seeks to bar SSL from manufacturing satellites which are significantly similar to Jupiter-1 with respect to the three patented technologies at issue in the case, scheduling argument on that motion for August 26, 2014.

About MDA

MDA is a global communications and information company providing operational solutions to commercial and government organizations worldwide.

MDA’s business is focused on markets and customers with strong repeat business potential, primarily in the Communications sector and the Surveillance and Intelligence sector. In addition, the Company conducts a significant amount of advanced technology development.

MDA’s established global customer base is served by more than 4,800 employees operating from 11 locations in the United States, Canada, and internationally.

The Company’s common shares trade on the Toronto Stock Exchange under the symbol “MDA.”