Canadian Solar's stock surged 5.13% intraday following a favorable ruling in a U.S. patent dispute with Maxeon Solar Technologies. The Patent Trial and Appeal Board invalidated all claims asserted by Maxeon, removing a legal overhang and boosting investor confidence in the company's technological and competitive position.

The ruling resolves a long-standing dispute over alleged patent infringements related to TOPCon solar cell technology. Canadian Solar had denied Maxeon's claims since 2024, and the board's decision reinforces the company's intellectual property strength. Canadian Solar has filed over 5,000 patent applications and holds more than 4,000 granted patents globally.

This legal victory is seen as a significant milestone for Canadian Solar, as it eliminates potential litigation risks and underscores its commitment to innovation. The market reaction reflects relief and optimism about the company's future growth prospects in the solar energy sector.