There were several major changes in leadership positions at some of the largest solar energy companies announced Tuesday. First of all, Greg Butterfield, CEO of Vivint Solar VSLR stepped down. The company appointed David Bywater, COO of Vivint Smart Home, as the interim CEO. Vivint is still in rebuilding mode just a few months after its $2.2 billion acquisition by SunEdison was called off. Shares of VSLR fell over 10% in Tuesday’s session. In another major CEO change, First Solar FSLR announced that CFO Mark Widmar would take over as chief executive on July 1, 2016. At that time, current CEO James Hughes intends to step down from his position. Hughes, who was focused on cost reduction initiatives, will remain in an advisory role and on the company’s board. Finally, SunEdison SUNEQ announced that John Dubel has been appointed chief restructuring officer of the bankrupt solar company. Dubel is currently the CEO of Dubel & Associates, a restructuring and turnaround services firm. Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report FIRST SOLAR INC (FSLR): Free Stock Analysis Report VIVINT SOLAR (VSLR): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research