Complex sentence: Holcim is one of the world's leading suppliers of cement and aggregates (crushed stone, sand and gravel) as well as further activities such as ready-mix concrete and asphalt including associated construction services.
Split into simpler sentences: Holcim is one of the world's leading suppliers of cement and aggregates (crushed stone, sand and gravel). The company also supplies ready-mix concrete and asphalt including associated construction services.