summit materials is a leading aggregates based construction materials company that supplies aggregates, cement, ready-mixed concrete and asphalt, and provides paving and other services. we are committed to promoting the success of our businesses by offering a safe place to work and implementing best practices, while striving to exceed our environmental and social responsibilities. summit materials was formed by its ceo tom hill and a small group of investors, including blackstone capital partners (an affiliate of the blackstone group) and silverhawk capital partners. summit materials completed its first acquisition in late 2009 and since then has closed on more than 30 acquisitions, which are organized into ten operating companies in three geographic regions across the united states and western canada. further information is available at www.summit-materials.com.