Complex sentence: Alliance Boots GmbH was a multinational pharmacy-led health and beauty group with corporate headquarters in Bern, Switzerland and operational headquarters in Nottingham and Weybridge, United Kingdom.
Split into simpler sentences: Alliance Boots GmbH was a multinational pharmacy-led health and beauty group. Its corporate headquarters were in Bern, Switzerland, and its operational headquarters were in Nottingham and Weybridge in the United Kingdom.