Complex sentence: It was listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index but in 2005 it was acquired by Cemex of Mexico.
Split into simpler sentences: It was listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index but was acquired by Cemex of Mexico in 2005. In 2005, the Company was acquired by Cemex of Mexico.