SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Canadian Solar Inc.

(Name of Issuer)

Common shares with no par value

(Title of Class of Securities)

136635109

(CUSIP Number)

07/16/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP Number(s):

136635109

Names of Reporting Persons

D. E. Shaw & Co., L.P.

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

Sec Use Only

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 5,529,197.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,529,197.00

Aggregate Amount Beneficially Owned by Each Reporting Person

5,529,197.00

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in row (9)

8.0 %

Type of Reporting Person (See Instructions)

IA, PN

Comment for Type of Reporting Person: 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.

SCHEDULE 13G

CUSIP Number(s):

136635109

Names of Reporting Persons

D. E. Shaw & Co., L.L.C.

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

Sec Use Only

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 5,383,050.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,383,050.00

Aggregate Amount Beneficially Owned by Each Reporting Person

5,383,050.00

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in row (9)

7.8 %

Type of Reporting Person (See Instructions)

SCHEDULE 13G

CUSIP Number(s):

136635109

Names of Reporting Persons

D. E. Shaw Valence Portfolios, L.L.C.

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

Sec Use Only

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 3,488,520.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,488,520.00

Aggregate Amount Beneficially Owned by Each Reporting Person

3,488,520.00

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in row (9)

5.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person: 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.

SCHEDULE 13G

CUSIP Number(s):

136635109

Names of Reporting Persons

David E. Shaw

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

Sec Use Only

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 5,529,197.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,529,197.00

Aggregate Amount Beneficially Owned by Each Reporting Person

5,529,197.00

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in row (9)

8.0 %

Type of Reporting Person (See Instructions)

SCHEDULE 13G

Item 1.

(a)

Name of issuer:

Canadian Solar Inc.

(b)

Address of issuer's principal executive offices:

4273 King Street East, Suite 102, Kitchener, Ontario, Canada N2P 2E9

Item 2.

(a)

Name of person filing:

D. E. Shaw & Co., L.P. D. E. Shaw & Co., L.L.C. D. E. Shaw Valence Portfolios, L.L.C. David E. Shaw

(b)

Address or principal business office or, if none, residence:

The business address for each reporting person is: Two Manhattan West 375 Ninth Avenue, 52nd Floor New York, NY 10001

(c)

Citizenship:

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.

(d)

Title of class of securities:

Common shares with no par value

(e)

CUSIP No.:

136635109

Item 3.

If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

(a)

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);

(b)

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);

(c)

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);

(d)

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);

(e)

An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f)

An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g)

A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h)

A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:

(k)

Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

Item 4.

Ownership

(a)

Amount beneficially owned:

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.

(b)

Percent of class:

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%

(c)

Number of shares as to which the person has:

(i) Sole power to vote or to direct the vote:

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

(ii) Shared power to vote or to direct the vote:

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

(iii) Sole power to dispose or to direct the disposition of:

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

(iv) Shared power to dispose or to direct the disposition of:

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

Item 5.

Ownership of 5 Percent or Less of a Class.

Not Applicable

Item 6.

Ownership of more than 5 Percent on Behalf of Another Person.

Not Applicable

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.

Not Applicable

Item 8.

Identification and Classification of Members of the Group.

Not Applicable

Item 9.

Notice of Dissolution of Group.

Not Applicable

Item 10.

Certifications:

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.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

D. E. Shaw & Co., L.P.

Signature:	/s/ Daniel R. Marcus
Name/Title:	Daniel R. Marcus / Chief Compliance Officer
Date:	07/23/2026

D. E. Shaw & Co., L.L.C.

Signature:	/s/ Daniel R. Marcus
Name/Title:	Daniel R. Marcus / Authorized Signatory
Date:	07/23/2026

D. E. Shaw Valence Portfolios, L.L.C.

Signature:	/s/ Daniel R. Marcus
Name/Title:	Daniel R. Marcus / Authorized Signatory
Date:	07/23/2026

David E. Shaw

Signature:	/s/ Daniel R. Marcus
Name/Title:	Daniel R. Marcus / Attorney-in-Fact for David E. Shaw
Date:	07/23/2026

Comments accompanying signature: 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.

Exhibit Information

Exhibit 3: Joint Filing Agreement, by and among the Reporting Persons, dated July 23, 2026.