Complex sentence: Barr Pharmaceuticals, Inc., was global specialty pharmaceutical company that operated in more than 30 countries worldwide and was engaged in the development, manufacture and marketing of generic and proprietary pharmaceuticals, biopharmaceuticals and active pharmaceutical ingredients.
Split into simpler sentences: Barr Pharmaceuticals, Inc., was a global specialty pharmaceutical company that operated in more than 30 countries worldwide. Barr were engaged in the development, manufacture and marketing of generic and proprietary pharmaceuticals, biopharmaceuticals and active pharmaceutical ingredients.