Complex sentence: In May 2006, Fisher Scientific and Thermo Electron announced that they would merge in a tax-free, stock-for-stock exchange; the merger closed on November 9,2006 and the merged company is now called Thermo Fisher Scientific.
Split into simpler sentences: In May 2006, Fisher Scientific and Thermo Electron announced that they would merge in a tax-free, stock-for-stock exchange. The merger closed on November 9,2006 and the merged company is now called Thermo Fisher Scientific.