Complex sentence: Quiksilver, Inc. is an American retail sporting company, founded in Torquay, Australia, and based in Huntington Beach, California and one of the world's largest manufacturers of surfwear and other boardsport-related equipment.
Split into simpler sentences: Quiksilver, Inc. is an American retail sporting company, founded in Torquay, Australia, but now based in Huntington Beach, California. It is one of the world's largest manufacturers of surfwear and other boardsport-related equipment.