Jeremy M. Sclar 2012 Irrevocable Family Trust's Ownership in ProMIS Neurosciences Inc.

The filing details the ownership of Jeremy M. Sclar 2012 Irrevocable Family Trust in ProMIS Neurosciences Inc. (PMN). The Trust holds 1,617,437 common shares directly. Additionally, the Trust holds various warrants to purchase common shares, including 26,217 warrants exercisable at $7.50 per share expiring in 2028, 664,894 warrants exercisable at $1.75 per share expiring in 2029, and 697,674 Tranche A, B, and C warrants exercisable at $2.02 and $2.50 per share, with varying expiration dates. The Tranche A and B warrants are tied to specific milestones related to the company's drug PMN310. The filing also notes that the Trust is a ten percent owner of the company.