Complex sentence: The company, headquartered in Treviso, has been establish in 2012 as a demerger from De'Longhi and since 2012 has been listed on the Milan Stock Exchange from 2012 until February 2016, when it was delisted following the acquisition by Mitsubishi Electric at the end of 2015.
Split into simpler sentences: The company, headquartered in Treviso, has been establish in 2012 as a demerger from De'Longhi. DeLclima was listed on the Milan Stock Exchange from 2012 until February 2016, when it was delisted following the acquisition by Mitsubishi Electric at the end of 2015.