Canadian Solar (CSIQ) CTO Qu exercises 8,133 RSUs, keeps 13.8M shares

Rhea-AI Filing Summary

Canadian Solar Inc. Chief Technology Officer Shawn Xiaohua Qu reported routine equity compensation activity involving company common stock and restricted share units. On May 13, 2026, he exercised 8,133 restricted share units into the same number of common shares at a stated price of $0.00 per share.

In connection with this, 3 common shares were disposed of as a tax-withholding disposition at $19.83 per share, a standard mechanism to cover tax obligations rather than an open-market sale. Following these transactions, Qu held 13,779,571 common shares directly, plus 275,935 common shares indirectly through his spouse, and 45,019 restricted share units outstanding.

Insider Trade Summary

8,133 shares exercised/converted

Mixed 4 txns

Insider Qu Shawn Xiaohua

Role Chief Technology Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Share Units	8,133	$0.00	--
Exercise	Common Stock	8,133	$0.00	--
Tax Withholding	Common Stock	3	$19.83	$59.49
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Share Units — 45,019 shares (Direct, null); Common Stock — 13,779,574 shares (Direct, null); Common Stock — 275,935 shares (Indirect, By Spouse)

Footnotes (1)

1. [object Object]

Key Figures

RSUs exercised: 8,133 units Tax-withholding shares: 3 shares at $19.83 Direct common stock holdings: 13,779,571 shares +3 more

6 metrics

RSUs exercised 8,133 units Restricted Share Units converted to common stock on May 13, 2026

Tax-withholding shares 3 shares at $19.83 Common shares delivered for tax liability on May 13, 2026

Direct common stock holdings 13,779,571 shares Common shares held directly after transactions

Indirect common stock holdings 275,935 shares Common shares held indirectly through spouse after transactions

Remaining RSUs 45,019 units Restricted Share Units outstanding after the exercise

RSU exercise price $0.00 per unit Stated conversion price for 8,133 RSUs

Key Terms

Restricted Share Units, tax-withholding disposition, derivative exercise/conversion, derivative security

4 terms

Restricted Share Units financial

"security_title: "Restricted Share Units""

Restricted share units (RSUs) are a promise from a company to give an employee or service provider actual shares or cash equal to the shares after certain conditions are met, typically staying with the company for a set time or hitting performance targets. Think of them like a time-locked gift card that becomes usable only after you’ve earned it. For investors, RSUs matter because they align employee incentives with company performance and can increase the number of shares outstanding over time, diluting existing ownership and affecting earnings per share.

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

derivative exercise/conversion financial

"transaction_action: "derivative exercise/conversion""

derivative security financial

"transaction_code_description: "Exercise or conversion of derivative security""

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

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^*

Qu Shawn Xiaohua

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026

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	05/13/2026		M		8,133	A	$0.00	13,779,574	D
Common Stock	05/13/2026		F		3	D	$19.83	13,779,571	D
Common Stock								275,935	I	By Spouse

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
Restricted Share Units	$0.00	05/13/2026		M			8,133	05/12/2026	(1)	Common Stock	8,133	$0.00	45,019	D

Explanation of Responses:

1. These RSUs have no expiration date.

	/s/ Shawn (Xiaohua) Qu	05/14/2026
	** 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 transactions did CSIQ CTO Shawn Qu report on May 13, 2026?

Shawn Qu reported exercising 8,133 restricted share units into common stock and a related tax-withholding disposition of 3 common shares. These actions reflect routine equity compensation mechanics, converting RSUs into shares while using a small share amount to satisfy tax obligations.

How many Canadian Solar (CSIQ) shares does Shawn Qu hold after this Form 4?

After the reported transactions, Shawn Qu directly holds 13,779,571 Canadian Solar common shares and indirectly holds 275,935 shares through his spouse. He also has 45,019 restricted share units outstanding, which represent additional potential future common shares when they convert.

Was the Canadian Solar (CSIQ) insider transaction a sale of shares on the market?

The filing shows a tax-withholding disposition of 3 common shares at $19.83 per share, not an open-market sale. This type of F-code transaction typically reflects shares delivered to cover tax liabilities tied to equity compensation rather than discretionary selling activity.

What does the exercise of 8,133 restricted share units mean for CSIQ insider ownership?

Exercising 8,133 restricted share units converted those units into an equal number of Canadian Solar common shares at a stated price of $0.00. This increases the insider’s direct share count while reducing outstanding RSUs, and is a normal step in equity-based compensation programs.

How many Canadian Solar (CSIQ) restricted share units does Shawn Qu still hold?

Following the transactions, Shawn Qu holds 45,019 restricted share units. These RSUs represent a right to receive an equivalent number of Canadian Solar common shares in the future, subject to the company’s vesting and settlement conditions described in its equity compensation arrangements.