[Class Action Lawsuit Against Canadian Solar Dismissed with Prejudice About Canadian Solar Inc. (NASDAQ: CSIQ) Canadian Solar Inc. is one of the world’s largest solar companies. As a leading vertically integrated provider of ingots, wafers, solar cells, solar modules and other solar applications, Canadian Solar designs, manufactures and delivers solar products and solar system solutions for on-grid and off-grid use] [FORM 6-K CANADIAN SOLAR INC. No. 199 Lushan Road Suzhou New District Suzhou, Jiangsu 215129 People’s Republic of China Form 20-F x Form 40-F o o o CANADIAN SOLAR INC. Form 6-K TABLE OF CONTENTS]

[Canadian Solar Reports Fourth Quarter and Fiscal Year 2012 Financial Results GUELPH, Ontario — March 11, 2013 — Canadian Solar Inc. (“Canadian Solar” or the “Company”) (NASDAQ: CSIQ), Fourth Quarter 2012 Highlights · Solar module shipments were 404 MW, compared to 384 MW in the third quarter of 2012. · Net revenue was $294 .8 million, compared to $32 6.0] [FORM 6-K CANADIAN SOLAR INC. No. 199 Lushan Road Suzhou New District Suzhou, Jiangsu 215129 People’s Republic of China Form 20-F x Form 40-F o o o CANADIAN SOLAR INC. Form 6-K TABLE OF CONTENTS]

[Canadian Solar to Receive US$40 Million Loan GUELPH, Canada, Jan. 31, 2013 — Canadian Solar Inc. (the “Company”, or “Canadian Solar”) (CSIQ), one of the world’s largest solar power companies, today announced that Credit Suisse will provide the Company with an up to US$40 million, 1 year tenor loan. The loan will be used to finance Canadian Solar’s previously announced] [FORM 6-K CANADIAN SOLAR INC. No. 199 Lushan Road Suzhou New District Suzhou, Jiangsu 215129 People’s Republic of China Form 20-F x Form 40-F o o o CANADIAN SOLAR INC. Form 6-K TABLE OF CONTENTS]