Management Change/Compensation (Form 8-K)

On June 26, 2026, by resolution of its sole shareholder, Domtar Corporation (the "Company") elected David J. Johnson, Jr. as a director. The appointment follows the entry by the Company into a consulting agreement with Gemsbok Partners LLC ("Gemsbok"), of which Mr. Johnson is the Managing Member, dated April 7, 2026.

A U.S. qualified lawyer, Mr. Johnson retired as a partner of (and later Of Counsel to) the international law firm O'Melveny & Myers LLP, where, for over 25 years, he advised clients on corporate and finance matters. During his tenure with O'Melveny, he served in a series of senior firm-wide leadership roles, including as a member of the Policy Committee (the firm's board-equivalent), Managing Partner of the Hong Kong office, Chair of the Transactions Department (overseeing more than 350 lawyers across 12 offices), and Co-Head of the Capital Markets Group. Mr. Johnson holds a J.D./M.B.A. from the University of Virginia School of Law/Darden School of Business and a B.A. in U.S. Government, with high honors, from the University of Virginia. The Company believes that Mr. Johnson's background and experience in finance and corporate matters, along with his managerial experience, qualifies him to act in this role.