• Breezaire Products Co.

• Building Automation Services, Inc.

• Building Systems Co.

• Burns: E.L. Burns Co.

• C & D Equipment L.L.C.

• C.T. Male Associates, P.C

• CE Design, Ltd.

• CID Associates

• CRS Products International

• CTS Cement Mfg. Co.

• California Wire Products

• Canada Kiosk Corporation

• Carlos Hahn Woodproducts

• Carpenter Rigging

• Carr Concrete Corp.

• Cease Fire by Dis-Cover

• Certa ProPainters

• Chicago Bridge & Iron Co.

• Chicago Bullet Proof Systems

• Christiansen Wood Products

• Classic Woodworking, Inc.

• Clestra Cleanroom

• Cl?tures Prepa

• Columbia Equipment Company, Inc.

• Columbus Industries

• Concredamp, Div. Durasol Corporation