SunEdison repeatedly delayed its annual filing, citing material weaknesses in internal controls that jeopardized the accuracy of reporting. The company filed for bankruptcy in April 2016 and spun off its subsidiaries TerraForm Power Inc. (NASDAQ: TERP) and TerraForm Global Inc. (NASDAQ: GLBL).

What went wrong at SunEdison?

By March 22, when Debtwire broke the news that the company was in talks to restructure its debt, shares had plunged 95% from their 52-week high. Today, SunEdison is in bankruptcy. The Securities and Exchange Commission and the Department of Justice are investigating its financial activities.

Who took over SunEdison?

Brookfield, which owns over 17,000 megawatts of renewable energy assets, will replace SunEdison as TerraForm Power's sponsor once the deal closes. It had a 12.16 percent stake in TerraForm Power as of Feb. 17, according to Thomson Reuters data.