UPM-Kymmene Corporation Stock Exchange Release (Other information disclosed according to the rules of the exchange) October 28, 2026 at 13:00 EET

HELSINKI, Oct. 28, 2026 /PRNewswire/ -- The Board of Directors of UPM-Kymmene Corporation ("UPM") has today decided to notify the Finnish Trade Register of the completion of UPM's partial demerger (the "Demerger") so that the completion of the Demerger would be registered on October 31, 2026. On April 29, 2026, UPM announced the approval of the demerger plan for the Demerger (the "Demerger Plan"). According to the Demerger Plan, all assets and liabilities of UPM relating to the UPM Plywood business area, or mainly serving the UPM Plywood business area, are transferred to WISA Group Plc ("WISA Group"), which will be established in the Demerger. UPM's Extraordinary General Meeting held on August 31, 2026 decided on the Demerger in accordance with the Demerger Plan.