Independent Contractor Fatality at Peace River Pulp Mill

PEACE RIVER, AB, June 11, 2022 – Mercer International Inc. (“Mercer” or the “Company”) (Nasdaq: MERC) is deeply saddened to announce that an independent contractor’s employee suffered a tragic and fatal workplace accident at our Peace River mill in Peace River, Alberta on June 11, 2022. Mercer has initiated an incident investigation and is fully cooperating with the authorities.

“We are saddened about the loss of life of one of our contractor’s employees and our thoughts are with the individual’s family and colleagues. An investigation of the accident has been started and we are working with the authorities and the contracting company to find out how this tragic incident occurred,” stated Roger Ashfield, Managing Director of Mercer Peace River. “Mercer’s emergency procedures were immediately activated and our industrial safety and occupational health personnel were involved for support.“

About Us

Mercer International Inc. is a global producer of forest products, bioproducts, and green electricity with operations in Germany, Canada, the United States, and Australia with a consolidated annual production capacity of approximately 2.3 million tonnes of pulp and 550 million board feet of lumber, and 140 thousand cubic meters of CLT. To obtain further information on the company, please visit its website at www.mercerint.com.

The preceding includes forward looking statements which involve known and unknown risks and uncertainties which may cause our actual results in future periods to differ materially from forecasted results. Words such as “expects”, “anticipates”, “are optimistic that”, “projects”, “intends”, “designed”, “will”, “believes”, “estimates”, “may”, “could” and variations of such words and similar expressions are intended to identify such forward‐looking statements. Among those factors which could cause actual results to differ materially are the following: the highly cyclical nature of our business, raw material costs, our level of indebtedness, competition, foreign exchange and interest rate fluctuations, our use of derivatives, expenditures for capital projects, environmental regulation and compliance, disruptions to our production, market conditions and other risk factors listed from time to time in our SEC reports.

APPROVED BY:

Jimmy S.H. Lee

Executive Chairman of the Board

(604) 684-1099

Juan Carlos Bueno

President & Chief Executive Officer

(604) 684-1099

Contact

For more information, please contact:

Name: David K. Ure

Title:    Senior VP Finance, CFO & Secretary

Phone: (604) 684-1099

email:   [email protected]