Shares of Sunrun (RUN) are soaring 8.67% in pre-market trading on Monday, following a significant upgrade from Guggenheim. The solar energy company's stock is reacting positively to the change in analyst sentiment, signaling improved prospects for the firm.

Guggenheim analyst Joseph Osha has upgraded Sunrun from Neutral to Buy, setting a price target of $27. This bullish stance represents a notable shift in the firm's outlook on Sunrun's potential. Osha believes that the stock's recent weakness has provided an attractive entry point, and also sees solid prospects for capital returns in 2026. The upgrade suggests that Guggenheim sees enhanced value and growth opportunities for Sunrun in the near future.

While Guggenheim's upgrade is driving the stock's momentum, it's worth noting that not all analysts share the same optimism. Barclays, for instance, maintained its Hold rating on Sunrun with a price target of $23. This divergence in analyst opinions highlights the complex landscape of the solar energy sector and the varying perspectives on Sunrun's position within it. As the market opens, investors will be closely watching to see if Sunrun can maintain this upward momentum throughout the trading session.