Complex sentence: In 2007 it was bought out in a private equity transaction, and in 2008 the trading business was transferred to a Swiss GmbH, which is a wholly owned subsidiary of a British company, AB Acquisitions Holdings.
Split into simpler sentences: In 2007 it was bought out in a private equity transaction. The trading business was transferred to a Swiss GmbH in 2008, which is a wholly owned subsidiary of a British company, AB Acquisitions Holdings.