Canadian Solar (CSIQ) CFO exercises 3,054 RSUs with small tax-withholding

Rhea-AI Filing Summary

Canadian Solar Inc. Chief Financial Officer Xinbo Zhu reported routine equity compensation activity. On May 21, 2026, he exercised 3,054 Restricted Share Units, converting them into the same number of Common Stock shares at a stated price of $0.00 per share. Of these shares, 3 were disposed of through a tax-withholding transaction, a non-market mechanism where shares cover tax obligations rather than being sold on the open market. Following these transactions, Zhu directly held 148,360 Common Stock shares and 25,812 Restricted Share Units, indicating a largely unchanged overall equity position aside from this grant’s vesting.

Insider Trade Summary

3,054 shares exercised/converted

Mixed 3 txns

Insider Zhu Xinbo

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Share Units	3,054	$0.00	--
Exercise	Common Stock	3,054	$0.00	--
Tax Withholding	Common Stock	3	$16.3434	$49.03

Holdings After Transaction: Restricted Share Units — 25,812 shares (Direct, null); Common Stock — 148,363 shares (Direct, null)

Footnotes (1)

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Key Figures

RSUs converted to Common Stock: 3,054 shares Shares withheld for taxes: 3 shares Tax-withholding price: $16.3434 per share +2 more

5 metrics

RSUs converted to Common Stock 3,054 shares Exercise of Restricted Share Units into Common Stock on May 21, 2026

Shares withheld for taxes 3 shares Tax-withholding disposition at $16.3434 per share on May 21, 2026

Tax-withholding price $16.3434 per share Value used for tax-withholding disposition of 3 shares

Common shares after transactions 148,360 shares Direct Common Stock holdings following reported Form 4 transactions

RSUs after transactions 25,812 units Restricted Share Units remaining after 3,054-unit conversion

Key Terms

Restricted Share Units, tax-withholding disposition, derivative security

3 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 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^*

Zhu Xinbo

(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 Financial 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)

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		3,054	A	$0.00	148,363	D
Common Stock	05/21/2026		F		3	D	$16.3434	148,360	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
Restricted Share Units	$0.00	05/21/2026		M			3,054	05/20/2026	(1)	Common Stock	3,054	$0.00	25,812	D

Explanation of Responses:

1. These RSUs have no expiration date.

	/s/ Xinbo Zhu	05/22/2026
	** 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) CFO Xinbo Zhu report?

Canadian Solar CFO Xinbo Zhu reported routine equity compensation activity. He exercised 3,054 Restricted Share Units into Common Stock and had 3 shares withheld to cover tax obligations, rather than sold on the open market, leaving his overall equity exposure largely intact.

How many shares did Canadian Solar (CSIQ) CFO acquire through RSU vesting?

Xinbo Zhu acquired 3,054 Common Stock shares through the vesting and exercise of 3,054 Restricted Share Units. These were converted at a stated price of $0.00 per share, reflecting equity compensation rather than an open-market purchase of Canadian Solar stock.

Were any Canadian Solar (CSIQ) shares sold by the CFO in this Form 4?

No open-market sale occurred; 3 shares were disposed of via tax withholding. This tax-withholding disposition means shares were delivered to satisfy tax obligations tied to the RSU vesting, not sold in the market, so it carries limited informational value on sentiment.

What are the CFO’s reported Canadian Solar (CSIQ) holdings after these transactions?

After the reported transactions, Xinbo Zhu held 148,360 Common Stock shares directly and 25,812 Restricted Share Units. These figures show his continuing substantial equity stake in Canadian Solar following this routine vesting and associated tax-withholding event.

What does the ‘M’ transaction code mean in the Canadian Solar (CSIQ) Form 4?

The ‘M’ code in this Form 4 reflects the exercise or conversion of a derivative security. Here, it indicates 3,054 Restricted Share Units were converted into 3,054 Common Stock shares as part of equity compensation, not bought in the open market.

What does the ‘F’ transaction code mean in Canadian Solar (CSIQ) CFO’s filing?

The ‘F’ code denotes a tax-withholding disposition. In this filing, 3 Common Stock shares were delivered to satisfy tax liabilities related to the RSU vesting, rather than being sold to another investor, so it does not represent a typical market sale.