[Canadian Solar Reports Third Quarter 2012 Financial Results Ontario, Canada, November 15, 2012 — Canadian Solar Inc. (“Canadian Solar” or the “Company”) (NASDAQ: CSIQ), one of the world’s largest solar companies, today announced its financial results for the third quarter ended September 30, 2012. Third Quarter 2012 Highlights · Solar module shipments were 384 MW, compared to 412 MW in] [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 3]

[Canadian Solar Opposes Protectionist Tariff, ITC Final Trade Ruling ONTARIO, November 8, 2012 — Canadian Solar Inc. (the “Company” or “Canadian Solar”) (NASDAQ: CSIQ), one of the world’s largest solar companies with a global supply-chain and manufacturing facilities in Canada and China, today announced that while it is relieved an end has come to a lengthy and costly legal suit,] [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 3 4]

[Canadian Solar Comments on the U.S. Department of Commerce Trade ONTARIO, Canada, October 11, 2012 -- Canadian Solar Inc. (the “Company” or “Canadian Solar”) (NASDAQ: CSIQ), one of the world’s largest solar companies with a global supply-chain and manufacturing facilities in Canada and China, today announced that the U.S. Department of Commerce (“DOC”) issued a final determination to impose antidumping] [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 3 4]

[Canadian Solar Completes Sale of Solar Power Plant to Stonepeak Infrastructure Partners ONTARIO, Canada, August 27, 2012 — ( Canadian Solar Inc. Named “Canadian Solar 1” (or “CS1”), the solar installation is now connected to the grid and includes approximately 50,000 Canadian Solar CS6M modules. Canadian Solar also won a 20-year contract to provide operations and maintenance services to Stonepeak] [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 Second Quarter 2012 Financial Results ONTARIO, Canada, August 15, 2012 — Canadian Solar Inc. (“Canadian Solar” or the “Company”) (NASDAQ: CSIQ), one of the world’s largest solar companies, today announced its financial results for the quarter ended June 30, 2012. Second Quarter 2012 Highlights · Solar module shipments were 412 MW, compared to 343 MW in the] [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]