Initial Report of Ownership - Dylan Marx

This filing details the initial ownership report of Dylan Marx, Chief Operating Officer of Canadian Solar Inc. (CSIQ), as of March 18, 2026. The report indicates direct ownership of 1,110 common shares. Additionally, Mr. Marx holds 17,744 unvested Restricted Share Units (RSUs) with various vesting dates extending up to May 23, 2026. Each RSU represents a contingent right to receive one common share upon vesting. The RSUs include 1,028 units vesting on May 23, 2026, 1,264 units vesting in two equal annual installments starting May 23, 2026, 4,582 units vesting in three approximately equal annual installments starting May 20, 2026, and 10,870 units vesting in four approximately equal annual installments starting May 12, 2026.