CSIQ COO logs option exercise and tax withholding

Canadian Solar Inc. Chief Operating Officer Marx Dylan reported routine equity compensation activity involving company common stock.

Rhea-AI Filing Summary

Canadian Solar Inc. Chief Operating Officer Marx Dylan reported routine equity compensation activity involving company common stock. On May 21, 2026, he exercised derivative securities to acquire 1,527 shares of common stock at a stated price of $0.0000 per share, classified as a derivative exercise/conversion. On the same date, 903 shares were disposed of in a tax-withholding transaction at $16.3434 per share, meaning the shares were delivered to cover tax obligations rather than sold in the open market. Following these transactions, the filing shows 4,780 shares held directly after the exercise and 3,877 shares held directly after the tax-withholding disposition.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Marx Dylan

Role Chief Operating Officer

Type	Security	Shares	Price	Value
Exercise	Common Stock	1,527	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	903	$16.3434	$15K

Holdings After Transaction: Common Stock — 3,877 shares (Direct)

Key Figures

Tax-withholding shares: 903 shares Tax-withholding price: $16.3434 per share Shares acquired via exercise: 1,527 shares +3 more

6 metrics

Tax-withholding shares 903 shares Common Stock, F code on May 21, 2026

Tax-withholding price $16.3434 per share Price used for 903-share tax disposition

Shares acquired via exercise 1,527 shares Common Stock, M code on May 21, 2026

Exercise transaction price $0.0000 per share Stated for derivative exercise/conversion

Holdings after exercise 4,780 shares Total shares following derivative exercise

Holdings after tax withholding 3,877 shares Total shares following tax-withholding disposition

Key Terms

tax-withholding disposition, derivative exercise/conversion, Common Stock, Form 4/A

4 terms

tax-withholding disposition financial

"903 shares were disposed of in a tax-withholding transaction at $16.3434 per share"

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

"he exercised derivative securities to acquire 1,527 shares of common stock"

Common Stock financial

"involving company 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/A regulatory

"The Form 4/A classifies this as a derivative exercise/conversion"

Form 4/A is an amended filing that corrects or updates an earlier Form 4, the mandatory report that insiders (like company executives, directors, or large shareholders) must file when their ownership stakes change. Think of it as an edited receipt showing who bought or sold stock and when; investors use it to track insider confidence, detect potential conflicts, and spot trading patterns that might signal future company prospects.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did CSIQ COO Marx Dylan report on May 21, 2026?

Marx Dylan reported an option-style exercise and a tax-withholding share disposition. He acquired 1,527 Canadian Solar common shares through a derivative exercise and used 903 shares, valued at $16.3434 each, to satisfy tax obligations tied to this equity compensation event.

Did CSIQ COO Marx Dylan sell shares in the open market in this Form 4/A?

The filing shows a tax-withholding disposition, not an open-market sale. On May 21, 2026, 903 common shares were delivered at $16.3434 per share to cover tax liabilities associated with an equity award, which is different from a discretionary market sale.

How many Canadian Solar (CSIQ) shares did Marx Dylan acquire through exercise?

Marx Dylan acquired 1,527 shares of Canadian Solar common stock. The Form 4/A classifies this as a derivative exercise/conversion with a stated transaction price of $0.0000 per share, reflecting the mechanics of the equity award rather than a market purchase price.

What share price was used for the CSIQ tax-withholding transaction?

The tax-withholding disposition used a price of $16.3434 per share. In this transaction, 903 Canadian Solar common shares were delivered at that price to satisfy the chief operating officer’s tax liability resulting from the equity compensation exercise on May 21, 2026.

How many CSIQ shares did Marx Dylan hold after these reported transactions?

The filing shows two post-transaction holding figures. It reports 4,780 common shares held directly following the derivative exercise and 3,877 common shares held directly following the tax-withholding disposition, illustrating the impact of both compensation-related entries on his direct share position.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/28/2026 - 06:27 AM EDT Learn about SEC filing dates

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^*

Marx Dylan

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

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)
05/22/2026

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	05/21/2026		M		1,527	A	$0.00	4,780	D
Common Stock	05/21/2026		F		903	D	$16.3434	3,877	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:

Remarks:

This Form 4 is being amended solely to correct a clerical error in the number of common shares beneficially owned by Mr. Dylan Marx.

	/s/ Dylan Marx	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)