Complex sentence: With a total asset worth of $415.75 billion it is the second largest company in the world by market value as estimated by the Financial Times in 2006 although the majority of its shares are non-publicly listed and under control of the Mexican government.
Split into simpler sentences: With a total asset worth of $415.75 billion, it is the second largest company in the world by market value (as estimated by the Financial Times in 2006). However, the majority of its shares are non-publicly listed and under control of the Mexican government.