Primoris Services Corp. was created in 2006 with West Coast contractor ARB Inc. as its major subsidiary. Shortly thereafter, it went public.
But Primoris really took off at the end of 2009. It acquired James Construction Group (JCG), Baton Rouge, La., from Angelo Iafrate Construction Co., Warren, Mich., for $135 million. Last November, it acquired Hillsboro, Ore.-based pipeline contractor Rockford Corp. for $82.6 million.