UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _______ to _______ FORM 10-Q Commission File No.: 000-51826 MERCER INTERNATIONAL INC. ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (Exact name of Registrant as specified in its charter) For the quarterly period ended September 30, 2020 Washington 47-0956945 OR (State or ot ...