Canadian Solar (CSIQ) CTO adds 4,980 shares, retains 13.8M stake

Rhea-AI Filing Summary

Canadian Solar Inc. Chief Technology Officer Shawn Xiaohua Qu reported routine equity compensation activity involving common stock and restricted share units. He exercised derivative awards covering 4,980 restricted share units into 4,980 shares of common stock and, in a separate entry, 6 shares were disposed of as a tax-withholding payment, consistent with code F.

Following these transactions, Qu directly holds 13,789,130 shares of Canadian Solar common stock and indirectly holds 275,935 shares through his spouse. He also has 35,457 restricted share units outstanding, and a footnote states these RSUs have no expiration date.

Insider Trade Summary

4,980 shares exercised/converted

Mixed 4 txns

Insider Qu Shawn Xiaohua

Role Chief Technology Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Share Units	4,980	$0.00	--
Exercise	Common Stock	4,980	$0.00	--
Tax Withholding	Common Stock	6	$19.4516	$116.71
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Share Units — 35,457 shares (Direct, null); Common Stock — 13,789,130 shares (Direct, null); Common Stock — 275,935 shares (Indirect, By Spouse)

Footnotes (1)

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Key Figures

RSUs exercised: 4,980 shares Tax-withholding shares: 6 shares at $19.4516 Direct common stock holding: 13,789,130 shares +2 more

5 metrics

RSUs exercised 4,980 shares Restricted share units converted to common stock on 2026-05-26

Tax-withholding shares 6 shares at $19.4516 Shares delivered to cover tax or exercise obligations

Direct common stock holding 13,789,130 shares Direct ownership after transactions

Indirect common stock holding 275,935 shares Indirect ownership by spouse after transactions

Remaining RSUs 35,457 units Restricted share units outstanding, no expiration date

Key Terms

Restricted Share Units, tax-withholding disposition, derivative exercise/conversion, indirect ownership, +1 more

5 terms

Restricted Share Units financial

"The filing lists a transaction in "Restricted Share Units" with 4,980 units exercised."

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

"One common stock entry is labeled as a "tax-withholding disposition" of 6 shares."

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 code M is described as "derivative exercise/conversion" for 4,980 units."

indirect ownership financial

"Shares are reported as indirect ownership with nature of ownership "By Spouse"."

exercise or conversion of derivative security financial

"The transaction code description states "Exercise or conversion of derivative security"."

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)
05/26/2026

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		M		4,980	A	$0.00	13,789,130	D
Common Stock	05/26/2026		F		6	D	$19.4516	13,789,124	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	05/26/2026		M			4,980	05/23/2026	(1)	Common Stock	4,980	$0.00	35,457	D

Explanation of Responses:

1. These RSUs have no expiration date.

	/s/ Shawn (Xiaohua) Qu	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) CTO Shawn Qu report?

Shawn Qu reported exercising derivative awards for 4,980 restricted share units into common stock and a separate tax-withholding disposition of 6 shares. These are coded as derivative exercise (M) and tax payment via share delivery (F), reflecting routine equity compensation activity.

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

After the reported transactions, Shawn Qu directly holds 13,789,130 common shares of Canadian Solar and indirectly holds 275,935 shares through his spouse. These holdings reflect his position following the RSU exercise and the small tax-withholding share disposition on the reported date.

What was the purpose of the 6 Canadian Solar (CSIQ) shares disposed by Shawn Qu?

The 6 shares were disposed of in a tax-withholding transaction, coded F, at a reported price of $19.4516 per share. This indicates shares were delivered to satisfy tax or exercise-related obligations, not an open-market sale initiated for investment or trading reasons.

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

Following the exercise of 4,980 restricted share units, Shawn Qu has 35,457 restricted share units remaining. A footnote clarifies that these RSUs have no expiration date, meaning they remain outstanding until they vest or are otherwise settled under their terms.

Does this Canadian Solar (CSIQ) Form 4 show any open-market stock sales by Shawn Qu?

The filing shows a derivative exercise of 4,980 RSUs and a tax-withholding disposition of 6 shares, not an open-market sale. Code F indicates shares were used to pay tax or exercise obligations rather than being sold on the open market for trading purposes.