X0306 4 2019-02-13 0 0001381531 Domtar CORP UFS 0001607542 Garcia Michael Dennis C/O DOMTAR CORPORATION 234 KINGSLEY PARK DRIVE FORT MILL SC 29715 0 1 0 0 President, Pulp and Paper Common Stock 2019-02-13 4 S 0 11272 51.52 D 0 D Shares being sold represent settled Stock Units which are an integral part of Domtar Corporation's long-term incentive compensation program. This transaction was executed in multiple trades at prices ranging from $51.33 to $51.68. The price reported above is the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. Razvan L. Theodoru, Attorney-in-fact for Mr. Garcia 2019-02-14