Canadian Solar (CSIQ) director sells 1,767 shares under Rule 144

Rhea-AI Filing Summary

Canadian Solar Inc. director Chang Leslie Li Hsien sold shares in the company’s stock. On May 26, 2026, the director executed an open-market sale of 1,767 shares of Common Stock at an average price of $19.4516 per share, in a transaction made pursuant to Rule 144. Following this sale, the filing shows the director’s directly held shares of Canadian Solar Common Stock as 0 shares.

Insider Trade Summary

Net Seller: 1,767 shares ($34,371)

Net Sell 1 txn

Insider Chang Leslie Li Hsien

Role null

Sold 1,767 shs ($34K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,767	$19.4516	$34K

Holdings After Transaction: Common Stock — 0 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 1,767 shares Average sale price: $19.4516 per share Proceeds from sale: $34,352.14 +3 more

6 metrics

Shares sold 1,767 shares Common Stock sold by director on May 26, 2026

Average sale price $19.4516 per share Open-market sale of Canadian Solar Common Stock

Proceeds from sale $34,352.14 1,767 shares × $19.4516 per share

Shares held after transaction 0 shares Director’s directly held Canadian Solar Common Stock

Transaction code S Sale in open market or private transaction

Regulatory basis Rule 144 Sale conducted under Securities Act of 1933 Rule 144

Key Terms

Rule 144, open-market sale, Common Stock

3 terms

Rule 144 regulatory

"The shares of common stock were sold pursuant to Rule 144 under the Securities Act of 1933, as amended."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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)

ONTARIO, CANADA

(Country)

2. Issuer Name and Ticker or Trading Symbol
Canadian Solar Inc. [ CSIQ ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/26/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/26/2026		S(1)		1,767	D	$19.4516	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The shares of common stock were sold pursuant to Rule 144 under the Securities Act of 1933, as amended.

	/s/ Leslie Chang	05/28/2026
	** 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 4 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Canadian Solar (CSIQ) report for director Chang Leslie Li Hsien?

Canadian Solar reported that director Chang Leslie Li Hsien sold 1,767 shares of Common Stock. The sale was an open-market transaction at an average price of $19.4516 per share, carried out under Rule 144 of the Securities Act.

How many Canadian Solar (CSIQ) shares did the director sell and at what price?

The director sold 1,767 shares of Canadian Solar Common Stock at an average price of $19.4516 per share. This was an open-market transaction, as disclosed in the Form 4 insider trading report filed with regulators.

When did the Canadian Solar (CSIQ) insider sale by Chang Leslie Li Hsien occur?

The insider sale took place on May 26, 2026. On that date, director Chang Leslie Li Hsien sold 1,767 shares of Canadian Solar Common Stock in an open-market transaction at an average price of $19.4516 per share.

How many Canadian Solar (CSIQ) shares does the director hold after this Form 4 transaction?

After the reported sale, the Form 4 shows the director directly holding 0 shares of Canadian Solar Common Stock. This means the 1,767 shares sold on May 26, 2026 fully reduced the reported direct ownership position to zero.

Was the Canadian Solar (CSIQ) insider sale conducted under Rule 144?

Yes. A footnote explains that the shares of Canadian Solar Common Stock were sold pursuant to Rule 144 under the Securities Act of 1933. Rule 144 provides a safe harbor for resales of restricted or control securities in the market.