Canadian Solar Director Shawn Qu Exercises Stock Options and Acquires Shares

This Form 4 filing reports that Shawn (Xiaohua) Qu, a director of Canadian Solar Inc. (CSIQ), exercised 18,779 stock options on April 1, 2026, and acquired an equivalent number of common shares at the exercise price of $9.328 per share. Following the transaction, Qu now directly owns 13,771,441 common shares. The filing also discloses that Qu's spouse indirectly holds 275,935 common shares and 7,512 stock options. The options exercised were part of a grant that vested between 2012-2015 and have an expiration date of May 20, 2026. The Form 4 is being filed late due to inadvertent administrative error, as noted in the remarks section.