Metsä Board Corporation Stock exchange release Managers' Transactions 17 March 2025 at 16.15 EET Mika Joukio, the CEO of Metsä Board Corporation, received shares based on Metsä Board's long term share-based incentive system on 14 March 2025. Metsä Board Oyj - Managers' transactions - Joukio ____________________________________________ Person subject to the notification requirement Name: Joukio, Mika Position: Chief Executive Officer Issuer: Metsä Board Oyj LEI: 743700KKB8Q035K38488 Notification type: INITIAL NOTIFICATION Reference number: 743700KKB8Q035K38488_20250317095842_30 ____________________________________________ Transaction date: 2025-03-14 Venue not applicable Instrument type: SHARE ISIN: FI0009000665 Nature of the transaction: RECEIPT OF A SHARE-BASED INCENTIVE Transaction details (1): Volume: 35186 Unit price: 0.00 EUR Aggregated transactions (1): Volume: 35186 Volume weighted average price: 0.00 EUR METSÄ BOARD CORPORATION Further information: Katri Sundström, VP, Investor Relations, tel. +358 10 462 0101 Eeva Impiö-Loimaala, General Counsel, tel. +358 44 040 3877 Metsä Board metsagroup.com/metsaboard (http://www.metsagroup.com/metsaboard/) Metsä Board is a producer of lightweight and high-quality folding boxboards, food service boards and white kraftliners. The fresh wood fibres we use in our products are a renewable and recyclable resource, that can be traced back to Northern European forests. We aim to have completely fossil-free mills and raw materials by 2030. We promote a culture of diversity, equality and inclusion. Metsä Board is listed on the Nasdaq Helsinki. In 2024 our sales totalled EUR 1.9 billion, and we have around 2,300 employees. Metsä Board is part of Metsä Group, whose parent company Metsäliitto Cooperative is owned by over 90,000 Finnish forest owners. Follow Metsä Board: LinkedIn (https://www.linkedin.com/company/metsa -board/) Instagram (https://www.instagram.com/metsaboard/?hl=en) YouTube (https://www.youtube.com/playlist?list=PLF6CD152EF0DA1E61)