X0306 4 2014-05-05 0 0001333274 MERCER INTERNATIONAL INC. MERC 0001331804 Heine Eric Xavier SUITE 1120 700 WEST PENDER STREET VANCOUVER A1 V6C 1G8 BRITISH COLUMBIA, CANADA 0 1 0 0 VP Sales, Marketing&Logistics Common Stock 2014-05-05 4 A 0 18145 0 A 90394 D Common Stock 2014-05-05 4 F 0 8165 9.19 D 82229 D Represents the number of shares issued upon vesting of the first of three tranches of performance share units ("PSUs") on May 5, 2014 based on the relative performance achieved during the 2011 - 2013 performance period. Represents the number of shares withheld to satisfy the Reporting Person's tax withholding obligation due on the May 5, 2014 PSU vesting. Represents the average of the intraday high and low trading price on May 5, 2014. /s/ Eric Heine 2014-05-07