Sunrun Inc. (NASDAQ: RUN), a leading provider of residential solar, battery storage, and energy services, saw its shares soar 6.57% in pre-market trading on Tuesday. This significant uptick comes as investors react to news of insider buying at the company.

According to a recent SEC filing, Edward Harris Fenster, a Director at Sunrun Inc., reported an acquisition of common shares of the company. While the exact number of shares and the purchase price were not immediately disclosed in the news brief, such insider buying often signals confidence in the company's future prospects.

Insider transactions, particularly purchases, are closely watched by investors as they can provide insights into the company's health and potential future performance. When company directors or executives buy shares with their own money, it's often interpreted as a bullish signal, suggesting they believe the stock is undervalued or that positive developments are on the horizon. This news appears to have sparked optimism among investors, leading to the significant pre-market rally in Sunrun's stock price.