Sunrun's stock plummeted 6.32% in pre-market trading on Friday.
The decline was driven by the company's report of lower quarterly adjusted earnings per share, disappointing investors despite a swing to profitability in the fourth quarter.
Sunrun reported Q4 earnings of $0.38 per diluted share, a significant improvement from a loss of $12.51 a year earlier. However, the adjusted EPS fell short of expectations, triggering the pre-market sell-off.