Nature of Business (Tables)

3 Months Ended

Mar. 31, 2015

Nature of Business

Schedule of list of primary operating subsidiaries and their reportable operating segment

Subsidiary	Operating Segment	Prior Operating Segment
ARB, Inc. (“ARB”)	West	West
ARB Structures, Inc.	West	West
Q3 Contracting, Inc. (“Q3C”)	West	West
Rockford Corporation (“Rockford”)	West	West
Vadnais Trenchless Services, Inc. (“Vadnais”); acquired in 2014	West	West
Silva Group (“Silva”)	East	East
Cardinal Contractors, Inc.	East	East
BW Primoris, LLC (“BWP”)	East	East
James Construction Group, LLC (“JCG”):
JCG Heavy Civil Division	East	East
JCG Infrastructure and Maintenance Division	East	East
JCG Industrial Division	Energy	East
Primoris Energy Services Corporation (“PES”)	Energy	East
Primoris AV, Energy and Electrical Construction Corp. (“Primoris AV”); acquired February 28, 2015	Energy	N/A
OnQuest, Inc.	Energy	Engineering
OnQuest, Canada, ULC (Born Heaters Canada, ULC prior to 2013)	Energy	Engineering