SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Chang Leslie Li Hsien (Last) (First) (Middle) C/O CANADIAN SOLAR INC. 4273 KING STREET EAST, SUITE 102 (Street) KITCHENER N2P 2E9 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 03/18/2026	3. Issuer Name and Ticker or Trading Symbol Canadian Solar Inc. [ CSIQ ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Share	1,001	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Share Unit	(1)	(1)	Common Share	21,538	(2)	D

Explanation of Responses:

1. Includes (i) 770 unvested RSUs, which will vest on April 1, 2026; (ii) 809 unvested RSUs, which will vest on July 1, 2026; (iii) 1,203 unvested RSUs, which will vest on October 1, 2026, (iv) 1,157 unvested RSUs, which will vest on January 1, 2027; (v) 1,602 unvested RSUs, which will vest on April 1, 2027; (vi) 1,953 unvested RSUs, which will vest on July 1, 2027; (vii) 1,955 unvested RSUs, which will vest on October 1, 2027; (viii) 2,629 unvested RSUs, which will vest on January 1, 2028; (ix) 3,180 unvested RSUs, which will vest on April 1, 2028; (x) 2,731 unvested RSUs, which will vest on July 1, 2028; (xi) 2,303 unvested RSUs, which will vest on October 1, 2028; and (xii) 1,246 unvested RSUs, which will vest on January 1, 2029.

2. Each RSU represents a contingent right to receive one share of the Issuer's Common Share upon vesting.

	/s/ Leslie Chang	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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