X0202 SCHEDULE 13G/A 0001104659-26-032852 0001009268 XXXXXXXX LIVE 1 Common shares with no par value 07/16/2026 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 5529197.00 0.00 5529197.00 5529197.00 N 8.0 IA PN The percentage figure reported is based upon 68,987,923 shares of common stock outstanding, composed of: (i) 67,896,749 shares of common stock outstanding as of May 18, 2026, as reported in the Issuer's 6-K, filed with the SEC on June 12, 2026, and (ii) 1,091,174 shares of common stock issuable upon conversion of convertible securities. D. E. Shaw & Co., L.L.C. DE 0.00 5383050.00 0.00 5383050.00 5383050.00 N 7.8 OO The percentage figure reported is based upon 68,987,923 shares of common stock outstanding, composed of: (i) 67,896,749 shares of common stock outstanding as of May 18, 2026, as reported in the Issuer's 6-K, filed with the SEC on June 12, 2026, and (ii) 1,091,174 shares of common stock issuable upon conversion of convertible securities. D. E. Shaw Valence Portfolios, L.L.C. DE 0.00 3488520.00 0.00 3488520.00 3488520.00 N 5.1 OO The percentage figure reported is based upon 68,916,988 shares of common stock outstanding, composed of: (i) 67,896,749 shares of common stock outstanding as of May 18, 2026, as reported in the Issuer's 6-K, filed with the SEC on June 12, 2026, and (ii) 1,020,239 shares of common stock issuable upon conversion of convertible securities. David E. Shaw X1 0.00 5529197.00 0.00 5529197.00 5529197.00 N 8.0 IN The percentage figure reported is based upon 68,987,923 shares of common stock outstanding, composed of: (i) 67,896,749 shares of common stock outstanding as of May 18, 2026, as reported in the Issuer's 6-K, filed with the SEC on June 12, 2026, and (ii) 1,091,174 shares of common stock 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. D. E. Shaw Valence Portfolios, 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. D. E. Shaw Valence Portfolios, 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.: 5,529,197 shares This is composed of (i) 1,856,981 shares in the name of D. E. Shaw Valence Portfolios, L.L.C., (ii) 1,020,239 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through convertible securities, (iii) 611,300 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through the exercise of call options, (iv) 1,657,779 shares in the name of D. E. Shaw Oculus Portfolios, L.L.C., (v) 165,616 shares in the name of D. E. Shaw Composite Portfolios, L.L.C., (vi) 70,935 shares that D. E. Shaw Cogence Portfolios, L.L.C. has the right to acquire through convertible securities, and (vii) 146,347 shares under the management of D. E. Shaw Investment Management, L.L.C. D. E. Shaw & Co., L.L.C.: 5,383,050 shares This is composed of (i) 1,856,981 shares in the name of D. E. Shaw Valence Portfolios, L.L.C., (ii) 1,020,239 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through convertible securities, (iii) 611,300 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through the exercise of call options, (iv) 1,657,779 shares in the name of D. E. Shaw Oculus Portfolios, L.L.C., (v) 165,616 shares in the name of D. E. Shaw Composite Portfolios, L.L.C., (vi) 70,935 shares that D. E. Shaw Cogence Portfolios, L.L.C. has the right to acquire through convertible securities, and (vii) 200 shares in the name of D. E. Shaw Investment Management Special Investment Fund, L.L.C. D. E. Shaw Valence Portfolios, L.L.C.: 3,488,520 shares This is composed of (i) 1,856,981 shares in the name of D. E. Shaw Valence Portfolios, L.L.C., (ii) 1,020,239 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through convertible securities, and (iii) 611,300 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through the exercise of call options. David E. Shaw: 5,529,197 shares This is composed of (i) 1,856,981 shares in the name of D. E. Shaw Valence Portfolios, L.L.C., (ii) 1,020,239 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through convertible securities, (iii) 611,300 shares that D. E. Shaw Valence Portfolios, L.L.C. has the right to acquire through the exercise of call options, (iv) 1,657,779 shares in the name of D. E. Shaw Oculus Portfolios, L.L.C., (v) 165,616 shares in the name of D. E. Shaw Composite Portfolios, L.L.C., (vi) 70,935 shares that D. E. Shaw Cogence Portfolios, L.L.C. has the right to acquire through convertible securities, and (vii) 146,347 shares under the management of D. E. Shaw Investment Management, 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 Composite Portfolios, L.L.C., and D. E. Shaw Cogence Portfolios, L.L.C. and the managing member of D. E. Shaw Investment Management, L.L.C., which in turn is the investment adviser of D. E. Shaw Investment Management Special Investment Fund, 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 Composite Portfolios, L.L.C., D. E. Shaw Cogence Portfolios, L.L.C., and D. E. Shaw Investment Management Special Investment Fund, 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 5,529,197 shares as described above constituting 8.0% of the adjusted 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 5,529,197 shares. D. E. Shaw & Co., L.P.: 8.0% D. E. Shaw & Co., L.L.C.: 7.8% D. E. Shaw Valence Portfolios, L.L.C.: 5.1% David E. Shaw: 8.0% D. E. Shaw & Co., L.P.: 0 shares D. E. Shaw & Co., L.L.C.: 0 shares D. E. Shaw Valence Portfolios, L.L.C.: 0 shares David E. Shaw: 0 shares D. E. Shaw & Co., L.P.: 5,529,197 shares D. E. Shaw & Co., L.L.C.: 5,383,050 shares D. E. Shaw Valence Portfolios, L.L.C.: 3,488,520 shares David E. Shaw: 5,529,197 shares D. E. Shaw & Co., L.P.: 0 shares D. E. Shaw & Co., L.L.C.: 0 shares D. E. Shaw Valence Portfolios, L.L.C.: 0 shares David E. Shaw: 0 shares D. E. Shaw & Co., L.P.: 5,529,197 shares D. E. Shaw & Co., L.L.C.: 5,383,050 shares D. E. Shaw Valence Portfolios, L.L.C.: 3,488,520 shares David E. Shaw: 5,529,197 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 July 23, 2026. D. E. Shaw & Co., L.P. /s/ Daniel R. Marcus 07/23/2026 D. E. Shaw & Co., L.L.C. /s/ Daniel R. Marcus 07/23/2026 D. E. Shaw Valence Portfolios, L.L.C. /s/ Daniel R. Marcus 07/23/2026 David E. Shaw /s/ Daniel R. Marcus 07/23/2026 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.