ATK

ATK may refer to:

==Companies== Alliant Techsystems, an American aerospace, defense, and sporting goods company, now part of Northrop Grumman ATK motorcycles, an off-road motorcycle manufacturer A.T. Kearney, a management consulting firm ATK Thiokol, or ATK Launch Systems Group, former names of Thiokol, an aerospace, defense and commercial products company, later part of Orbital ATK