Complex sentence: The Torrent Group worth USD 2.18 billion is a group of companies in India founded by U. N. Mehta, and run by his sons, Sudhir and Samir Mehta.
Split into simpler sentences: The Torrent Group worth USD 2.18 billion is a group of companies in India founded by U. N. Mehta. Currently, the group is managed by his sons, Sudhir and Samir Mehta.