16 Sand, LLC

Aerohead Group, Inc.

Alterman, Inc.

Austin Materials, LLC

Beck Readymix Concrete Company, Ltd.

Bear Readymix Concrete, LLC

CDI Ventures, Inc.

Clark Construction of Texas, Inc.

Closner Equipment Co., Inc.

Cold Car USA, Inc.

Cox Paving Company of Texas, Inc.

D&D Contractors, Inc.

EIB Contractors, Inc.

Grit Design Build, LLC

Hermann Sons Life

Industrial Asphalt, LLC

Interstate Barricades & Markings, Inc.

Mission Plumbing, Heating & Air Conditioning Co., Inc.

Pro-Line Paving, LLC

Ridout Barrett & Co., PC

Summit Materials Holding, LP

Troy Vines, Incorporated

Turnkey Processing Services, LLC

Vulcan Construction Materials, LLC

Westward Environmental, Inc.