Exhibit 99.1

For Immediate Release
MERCER INTERNATIONAL INC. COMPLETES PRIVATE OFFERING OF
$350 MILLION OF SENIOR NOTES
NEW YORK, NY, December 7, 2018 – Mercer International Inc. (Nasdaq: MERC) (the “Company”) today announced that it has completed its previously announced private offering of $350 million in aggregate principal amount of 7.375% senior notes due January 15, 2025 (the “Notes”).
The Notes were issued at a price of 100% of their principal amount. The net proceeds from this offering, together with cash on hand, will be used to finance the purchase price under the previously announced acquisition of all of the outstanding shares of Daishowa-Marubeni International Ltd. and to pay for fees and expenses.
The Notes were sold to qualified institutional buyers in reliance on Rule 144A under theSecurities Act of 1933, as amended (the “Securities Act”), and outside the United States tonon-U.S. persons in reliance on Regulation S under the Securities Act. The Notes have not been registered under the Securities Act or any state securities laws and, unless so registered, may not be offered or sold in the United States except pursuant to an exemption form, or in a transaction not subject to, the registration requirements of the Securities Act and applicable state securities laws. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of the Notes in any state in which such offer, solicitation or sale would be unlawful.
Mercer International Inc. is a global forest products company with operations in Germany and Canada.