 The completion of the sell-off finalized SunEdison's transition into a dedicated renewable-energy company..Following years of major expansion and the announcement of the intent – which eventually fell through – to acquire the residential-rooftop solar company Vivint Solar in 2015, SunEdison's stock plummeted and its more than $11billion in debt caused it to face bankruptcy in April 2016.It filed for Chapter 11 bankruptcy protection on April 21, 2016.