Canadian Solar Secures Patent Win and Raises US$230M in Convertible Notes

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PTAB invalidated all Maxeon Solar infringement claims, confirming invalidity of contested patents and underscoring Canadian Solar’s 4,000-patent portfolio. The company raised US$230 million via 3.25% convertible senior notes due 2031, netting US$223.1 million to back its 25 GWp solar and 81 GWh storage pipeline.

1. Patent Ruling Bolsters Canadian Solar’s IP Portfolio

On January 15, 2026, the U.S. Patent Trial and Appeal Board issued final written decisions invalidating all claims asserted by Maxeon Solar Pte. Ltd. against Canadian Solar in related federal court litigation. The PTAB found that the Maxeon patents at issue lacked novelty and non-obviousness, delivering a decisive legal victory for Canadian Solar. The company highlighted that it has filed over 5,000 patent applications globally and holds more than 4,000 granted patents, underlining its commitment to innovation across the solar module, energy storage and project development value chain. Canadian Solar’s president, Colin Parkin, emphasized that the decision reaffirms the fairness of the international IP framework and deters the misuse of patents that can distort competition and hinder genuine technological advancement.

2. Convertible Notes Offering Raises $223.1 Million for Growth Initiatives

On January 13, 2026, Canadian Solar closed a private offering of US$230 million aggregate principal amount of 3.25% convertible senior notes due 2031, with initial purchasers exercising their option in full to purchase an additional US$30 million. Net proceeds totaled approximately US$223.1 million after discounts and expenses. Funds raised are earmarked for the company’s expansion of utility-scale solar and energy storage projects, R&D in next-generation photovoltaic technologies and strengthening global manufacturing capacity. The notes, offered under Rule 144A to qualified institutional buyers, are convertible into common shares at a predetermined conversion rate, providing potential equity upside while maintaining a fixed interest cost structure over the next five years.

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PP