# EDGAR Filing Document

**Accession Number:** 0001389641
**File Stem:** 0001104659-26-030296
**Filing Date:** 2026-3
**Character Count:** 5428
**Document Hash:** 4cb41c5a5c3249d61f97b1f47bc43462
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-030296.hdr.sgml**: 20260415

**ACCESSION NUMBER**: 0001104659-26-030296

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260318

**FILED AS OF DATE**: 20260318

**DATE AS OF CHANGE**: 20260318

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Qu Shawn Xiaohua
- **CENTRAL INDEX KEY:** 0001389641

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33107
- **FILM NUMBER:** 26767074

**MAIL ADDRESS:**
- **STREET 1:** C/O CANADIAN SOLAR INC.
- **STREET 2:** XIN ZHUANG INDUSTRY PARK, CHANGSHU
- **CITY:** SUZHOU, JIANGSU
- **STATE:** F4
- **ZIP:** 215562
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Canadian Solar Inc.
- **CENTRAL INDEX KEY:** 0001375877
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **STATE OF INCORPORATION:** A6
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 4273 KING STREET EAST, SUITE 102
- **CITY:** KITCHENER
- **STATE:** A6
- **ZIP:** N2P 2E9
- **BUSINESS PHONE:** 519-837-1881

**MAIL ADDRESS:**
- **STREET 1:** 66 WELLINGTON STREET WEST
- **STREET 2:** SUITE 4100
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M5K 1B7

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Qu Shawn Xiaohua<br><sub>(Last) (First) (Middle)</sub><br>C/O CANADIAN SOLAR INC.<br>4273 KING STREET EAST, SUITE 102<br><sub>(Street)</sub><br>KITCHENER,  N2P 2E9<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Canadian Solar Inc. [ CSIQ ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-03-18 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Share | 13752662 | D |  |
| Common Share | 275935 | I | By Spouse |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Restricted Share Unit | <sup>(1)</sup> | <sup>(1)</sup> | Common Share | 53152 | <sup>(2)</sup> | D |  |
| Stock Option (Right to Buy) | <sup>(3)</sup> | 2026-05-20 | Common Share | 18779 | $9.328 | D |  |
| Option (Right to Buy) | <sup>(4)</sup> | 2026-05-20 | Common Share | 7512 | $9.328 | I | By Spouse |

---

### Footnotes:

(1) Includes (i) 3,083 unvested RSUs, which will vest on May 23, 2026; (ii) 3,793 unvested RSUs, which will vest in two approximately equal annual installments beginning on May 23, 2026; (iii) 13,745 unvested RSUs, which will vest in three approximately equal annual installments beginning on May 20, 2026; (iv) 32,531 unvested RSUs, which will vest in four approximately equal annual installments beginning on May 12, 2026.

(2) Each RSU represents a contingent right to receive one share of the Issuer's Common Share upon vesting.

(3) Includes 18,779 stock options, of which 4,695, 4,694, 4,695 and 4,695 became fully vested and exercisable on May 20, 2012, 2013, 2014 and 2015, respectively.

(4) Includes 7,512 stock options, of which 1,878, 1,878, 1,878 and 1,878 became fully vested and exercisable on May 20, 2012, 2013, 2014 and 2015, respectively.

**Signature:** /s/ Shawn (Xiaohua) Qu  
**Date:** 2026-03-18

### Remarks:

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.**