Ash Grove Cement
Kosmos Cement
Holcim (US) Inc.
Ash Grove Cement
Cemex
CEMEX
CEMEX Balcones
UNACEM Corp
National Cement
Holcim (US) Inc.
Heidelberg Cement
CalPortland
Cemex
Buzzi Unicem
Heidelberg Cement
Argos Cement
Cemex
Heidelberg Cement
Holcim (Romania) S.A.
SCHWENK