[Form 20-F (Mark One) o OR ý For the fiscal year ended December 31, 2015 OR o For the transition period from to OR o Date of event requiring this shell company report CANADIAN SOLAR INC. N/A Canada (Jurisdiction of incorporation or organization) 545 Speedvale Avenue West Michael G. Potter, Chief Financial Officer (Name, Telephone, E-mail and/or Facsimile number and] [Silicon Wafer Purchase Contract CSI-GCL-20160120 Contract Number: Suzhou New District This Silicon Wafer Procurement Contract (this “Contract”) is entered into by and among the following parties in Party A-1 (Purchaser 1): CSI Cells Co., Ltd. Domicile: No. 199 Lushan Road, Suzhou New District Party A-2 (Purchaser 2): CSI-GCL Solar Manufacturing (Yancheng) Co., Ltd. Domicile: No. 88 GCL Avenue, Funing Economic] [LIST OF MAJOR SUBSIDIARIES (As of March 31, 2016) Name of Major Subsidiaries Place of Incorporation Ownership Interest CSI Solartronics (Changshu) Co., Ltd. People’s Republic of China 100 % CSI Solar Technologies Inc. People’s Republic of China 100 % CSI New Energy Holding Co., Ltd. People’s Republic of China 100 % Canadian Solar Manufacturing (Luoyang) Inc. People’s Republic of China] [Certification by the Chief Executive Officer I, Shawn (Xiaohua) Qu, certify that: 1. 2. 3. 4. (a) (b) (c) (d) 5. (a) (b) Shawn (Xiaohua) Qu Chief Executive Officer EX-12.1 4 a2228185zex-12_1.htm EX-12.1] [Certification by the Chief Financial Officer I, Michael G. Potter, certify that: 1. 2. 3. 4. (a) (b) (c) (d) 5. The Company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Company’s auditors and the audit committee of the Company’s board of directors (or persons performing the] [Certification by the Chief Executive Officer (1) (2) Shawn (Xiaohua) Qu Chief Executive Officer EX-13.1 6 a2228185zex-13_1.htm EX-13.1] [Certification by the Chief Financial Officer (1) (2) Michael G. Potter Chief Financial Officer EX-13.2 7 a2228185zex-13_2.htm EX-13.2] [CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement Nos. 333-147042, 333-178187 and 333-201766 on Form S-8 and Registration Statement Nos. 333-189895 and 333-208828 on Form F-3 of our reports dated April 20, 2016, relating to the financial statements and financial statement schedule of Canadian Solar Inc. and subsidiaries (the “Company”), and]