Canadian Solar Inc.

For the period ended Oct 29, 2026. Filed Oct 29, 2026.

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Oct 29, 2026 · Filed Oct 29, 2026

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CSIQ$11.12+7.9%Stored close · as of Nov 6, 2026

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Contents

Explanatory Note

CSI Solar Co., Ltd. (“CSI Solar”), a majority-owned subsidiary of Canadian Solar Inc. (“Canadian Solar”) with its shares listed on the Shanghai Stock Exchange (“SSE”)’s Sci-Tech Innovation Board, has filed with the SSE its report regarding the third quarter of 2026 (the “2026 Third Quarter Report”). Currently, Canadian Solar owns approximately 64% of CSI Solar.

Exhibit 99.1 provides an English translation of the 2026 Third Quarter Report of CSI Solar.

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