[Canadian Solar Signs C$310 Million EPC Agreement for GUELPH, Ontario, June 10, 2013 — Canadian Solar Inc. (NASDAQ: CSIQ) (the “Company”, or “Canadian Solar”), one of the world’s largest solar power companies, today announced that its subsidiary, Canadian Solar Solutions Inc., has entered into an Engineering, Procurement, and Construction (EPC) agreement with Grand Renewable Solar LP, a solar energy project] [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 Inc. Announces Results of 2013 Annual Meeting of Shareholders GUELPH, Ontario, June 7, 2013 , – Canadian Solar Inc. (the “Company”, or “Canadian Solar”) (NASDAQ: CSIQ) 1. The election of Mr. Shawn (Xiaohua) Qu as a director of the Company; 2. The election of Mr. Michael G. Potter as a director of the Company; 3. The election of] [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 2]

[BluEarth Renewables to Purchase Four Utility-Scale Solar Power Plants From Canadian Solar GUELPH, Ontario and CALGARY, Alberta. June 5, 2013 - Canadian Solar Inc. (NASDAQ: CSIQ) ( the “Company”, or “Canadian Solar”), one of the world’s largest solar power companies, today announced that its subsidiary, Canadian Solar Solutions Inc., has entered into a sales agreement with a BluEarth Renewables Inc.] [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 Signs Loan Agreement with China Development Bank GUELPH, Ontario, June 3, 2013 — Canadian Solar Inc. (the “Company”, or “Canadian Solar”) (NASDAQ: CSIQ), one of the world’s largest solar power companies, today announced that it has signed a RMB270 million (US$44.1 million) loan agreement with China Development Bank. The loan facility has a fifteen-year maturity, including one year] [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 CON]

[Canadian Solar Reports First Quarter 2013 Financial Results Guelph, Ontario, May 28, 2013 — Canadian Solar Inc. (“Canadian Solar” or the “Company”) (NASDAQ: CSIQ), one of the world’s largest solar power companies, today announced its financial results for the first quarter ended March 31, 2013. First Quarter 2013 Highlights · Solar module shipments were 340 MW, compared to 404 MW] [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]