Holliday Rock Co., Inc.

Vulcan Materials Co.

Sls & N, Inc.

Vulcan Materials Co.

United Rock Products Corp.

Livingston Graham

Curtis Sand & Gravel Co.

Vulcan Materials Co.

Vulcan Materials Co.

Hi-Grade Materials Co.

Service Rock Products Corp.

Antelope Valley Aggregate, Inc.

Granite Construction Co.

Cemex, Inc.