X0202 SCHEDULE 13G 0001009268 XXXXXXXX LIVE Common shares with no par value 01/13/2026 0001375877 Canadian Solar Inc. 136635109 4273 King Street East, Suite 102 Kitchener A6 N2P 2E9 Rule 13d-1(c) D. E. Shaw & Co., L.P. DE 0.00 4366760.00 0.00 4366760.00 4366760.00 N 6.4 IA PN The percentage figures reported throughout this Schedule 13G are based upon 68,063,421 common shares outstanding, composed of: (i) 66,972,246 common shares outstanding as of April 29, 2025, as reported in the Issuer's 6-K filed with the SEC on May 21, 2025, and (ii) 1,091,175 common shares issuable upon conversion of convertible securities. D. E. Shaw & Co., L.L.C. DE 0.00 4366760.00 0.00 4366760.00 4366760.00 N 6.4 OO The percentage figures reported throughout this Schedule 13G are based upon 68,063,421 common shares outstanding, composed of: (i) 66,972,246 common shares outstanding as of April 29, 2025, as reported in the Issuer's 6-K filed with the SEC on May 21, 2025, and (ii) 1,091,175 common shares issuable upon conversion of convertible securities. David E. Shaw X1 0.00 4366760.00 0.00 4366760.00 4366760.00 N 6.4 IN The percentage figures reported throughout this Schedule 13G are based upon 68,063,421 common shares outstanding, composed of: (i) 66,972,246 common shares outstanding as of April 29, 2025, as reported in the Issuer's 6-K filed with the SEC on May 21, 2025, and (ii) 1,091,175 common shares issuable upon conversion of convertible securities. Canadian Solar Inc. 4273 King Street East, Suite 102, Kitchener, Ontario, Canada N2P 2E9 D. E. Shaw & Co., L.P. D. E. Shaw & Co., L.L.C. David E. Shaw The business address for each reporting person is: Two Manhattan West 375 Ninth Avenue, 52nd Floor New York, NY 10001 D. E. Shaw & Co., L.P. is a limited partnership organized under the laws of the state of Delaware. D. E. Shaw & Co., L.L.C. is a limited liability company organized under the laws of the state of Delaware. David E. Shaw is a citizen of the United States of America. Y D. E. Shaw & Co., L.P.: 4,366,760 shares This is composed of (i) 1,557,276 shares in the name of D. E. Shaw Valence Portfolios, L.L.C., (ii) 1,020,240 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through convertible securities, (iii) 602,600 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through the exercise of call options, (iv) 1,085,309 shares in the name of D. E. Shaw Oculus Portfolios, L.L.C., (v) 70,935 shares that D. E. Shaw Cogence Portfolios, L.L.C. has the right to acquire through convertible securities, and (vi) 30,400 shares in the name of D. E. Shaw Composite Portfolios, L.L.C. D. E. Shaw & Co., L.L.C.: 4,366,760 shares This is composed of (i) 1,557,276 shares in the name of D. E. Shaw Valence Portfolios, L.L.C., (ii) 1,020,240 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through convertible securities, (iii) 602,600 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through the exercise of call options, (iv) 1,085,309 shares in the name of D. E. Shaw Oculus Portfolios, L.L.C., (v) 70,935 shares that D. E. Shaw Cogence Portfolios, L.L.C. has the right to acquire through convertible securities, and (vi) 30,400 shares in the name of D. E. Shaw Composite Portfolios, L.L.C. David E. Shaw: 4,366,760 shares This is composed of (i) 1,557,276 shares in the name of D. E. Shaw Valence Portfolios, L.L.C., (ii) 1,020,240 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through convertible securities, (iii) 602,600 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through the exercise of call options, (iv) 1,085,309 shares in the name of D. E. Shaw Oculus Portfolios, L.L.C., (v) 70,935 shares that D. E. Shaw Cogence Portfolios, L.L.C. has the right to acquire through convertible securities, and (vi) 30,400 shares in the name of D. E. Shaw Composite Portfolios, L.L.C. David E. Shaw does not own any shares directly. By virtue of David E. Shaw's position as President and sole shareholder of D. E. Shaw & Co., Inc., which is the general partner of D. E. Shaw & Co., L.P., which in turn is the investment adviser of D. E. Shaw Valence Portfolios, L.L.C., D. E. Shaw Oculus Portfolios, L.L.C., D. E. Shaw Cogence Portfolios, L.L.C., and D. E. Shaw Composite Portfolios, L.L.C., and by virtue of David E. Shaw's position as President and sole shareholder of D. E. Shaw & Co. II, Inc., which is the managing member of D. E. Shaw & Co., L.L.C., which in turn is the manager of D. E. Shaw Valence Portfolios, L.L.C., D. E. Shaw Oculus Portfolios, L.L.C., D. E. Shaw Cogence Portfolios, L.L.C., and D. E. Shaw Composite Portfolios, L.L.C., David E. Shaw may be deemed to have the shared power to vote or direct the vote of, and the shared power to dispose or direct the disposition of, the 4,366,760 shares as described above constituting 6.4% of the outstanding shares, and, therefore, David E. Shaw may be deemed to be the beneficial owner of such shares. David E. Shaw disclaims beneficial ownership of such 4,366,760 shares. D. E. Shaw & Co., L.P.: 6.4% D. E. Shaw & Co., L.L.C.: 6.4% David E. Shaw: 6.4% D. E. Shaw & Co., L.P.: 0 shares D. E. Shaw & Co., L.L.C.: 0 shares David E. Shaw: 0 shares D. E. Shaw & Co., L.P.: 4,366,760 shares D. E. Shaw & Co., L.L.C.: 4,366,760 shares David E. Shaw: 4,366,760 shares D. E. Shaw & Co., L.P.: 0 shares D. E. Shaw & Co., L.L.C.: 0 shares David E. Shaw: 0 shares D. E. Shaw & Co., L.P.: 4,366,760 shares D. E. Shaw & Co., L.L.C.: 4,366,760 shares David E. Shaw: 4,366,760 shares Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Exhibit 3: Joint Filing Agreement, by and among the Reporting Persons, dated March 20, 2026. D. E. Shaw & Co., L.P. /s/ Daniel R. Marcus 03/20/2026 D. E. Shaw & Co., L.L.C. /s/ Daniel R. Marcus 03/20/2026 David E. Shaw /s/ Daniel R. Marcus 03/20/2026 Exhibit 1: Power of Attorney, granted by David E. Shaw relating to D. E. Shaw & Co., Inc., in favor of the signatories hereto, among others, dated August 1, 2024. Exhibit 2: Power of Attorney, granted by David E. Shaw relating to D. E. Shaw & Co. II, Inc., in favor of the signatories hereto, among others, dated August 1, 2024.