X0407 4 2023-06-01 0 0001333274 MERCER INTERNATIONAL INC. MERC 0001848169 North Janine SUITE 1120, 700 WEST PENDER STREET VANCOUVER A1 V6C 1G8 BRITISH COLUMBIA, CANADA 1 0 0 0 0 Cash Settled Deferred Stock Units 2023-06-01 4 A 0 1925 A Common Stock 1925 4495 D Cash Settled Deferred Stock Units 2023-06-01 4 A 0 11548 A Common Stock 11548 16043 D Represents cash settled deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer"), at the election of the Reporting Person as a quarterly equity grant to the Reporting Person, under Mercer's non-employee director compensation program as amended (the "Plan") in respect of the period from April 1, 2023 to May 31, 2023, which vest on the one-year anniversary of the grant date. Each DSU represents the right to receive a cash payment equal to the fair market value of one share of Mercer's common stock on the redemption date(s) and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms. Mercer subsequently transitioned its non-employee director compensation program from quarterly on a calendar year basis to a program based on the one-year period between annual general meetings, being the general term of office of directors. Represents DSUs issued by Mercer, at the election of the Reporting Person, as a grant under Mercer's non-employee director compensation program in respect of the board term commencing May 31, 2023 and ending at its next regularly scheduled annual general meeting in 2024. Each DSU represents the right to receive a cash payment equal to the fair market value of one share of Mercer's common stock on the redemption date(s) and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms. The DSUs vest upon the earlier of the one year anniversary of the grant date or the date of the next regularly scheduled annual general meeting. /s/ Janine North 2023-06-02