STORA ENSO OYJ STOCK EXCHANGE RELEASE 14 August 2025 at 14:25 EEST Stora Enso Oyj received a notification pursuant to chapter 9, section 5 of the Securities Market Act from BlackRock, Inc on 14 August 2025. On 13 August 2025, BlackRock's holding, including holding through financial instruments, in Stora Enso's shares decreased below the 5 percent threshold. +----------------+--------------+-----------------------------+---------------+ | |% of shares |% of shares and voting rights|Total of both | | |and voting |through financial instruments|in % (7.A + | | |rights |(total of 7.B) |7.B) | | |(total of 7.A)| | | +----------------+--------------+-----------------------------+---------------+ |Resulting |Below 5% |Below 5% shares |Below 5%shares | |situation on the|shares | | | |date on | |Below 5% voting rights |Below 5% voting| |which threshold |Below 5% | |rights | |was crossed or |voting rights | | | |reached | | | | +----------------+--------------+-----------------------------+---------------+ |Position of |4.39% shares |0.88% shares |5.28% shares | |previous | | | | |notification |Below 5% |Below 5% voting rights |Below 5% voting| |(if applicable) |voting rights | |rights | +----------------+--------------+-----------------------------+---------------+ +------------+--------+---------+-----------------+----------------------+ |A: Shares | |and voting | |rights | +------------+--------+---------+-----------------+----------------------+ |Class/type |Number |% of shares and voting rights | |of |of | | |shares |shares | | | |and | | |ISIN code |voting | | |(if |rights | | |possible) | | | +------------+--------+---------+-----------------+----------------------+ |Direct |Indirect|Direct |Indirect | | | | | | |(SMA 9:5) |(SMA 9:6|(SMA 9:5)|(SMA 9:6 and 9:7)| | |and 9:7)| | | +------------+--------+---------+-----------------+----------------------+ |FI0009005961| |Below 5% | |Below 5% shares | | | |shares | | | | | | | |Below 5% voting rights| | | |Below 5% | | | | | |voting | | | | | |rights | | | +------------+--------+---------+-----------------+----------------------+ |SUBTOTAL A |Below 5% |Below 5% shares | | |shares | | | | |Below 5% voting rights | | |Below 5% | | | |voting | | | |rights | | +------------+--------+---------+-----------------+----------------------+ B: Financial Instruments according to SMA 9:6a Type of Expiration Exercise/ Physical Number % of shares financial date Conversion or of and voting instrument Period cash shares rights settlement and voting rights American N/A N/A Physical Below 5% Below 5% Depositary shares shares Receipt (US86210M1062) Below 5% Below 5% voting voting rights rights Securites lent N/A N/A Physical Below 5% Below 5% shares shares Below 5% Below 5% voting voting rights rights CFD N/A N/A Cash Below 5% Below 5% shares shares Below 5% Below 5% voting voting rights rights SUBTOTAL B Below 5% Below 5% shares shares Below 5% Below 5% voting voting rights rights Stora Enso has two series of shares. Each A share and every ten R shares carry one vote. Stora Enso has 175,552,207 A shares and 613,067,780 R shares in issue. The Company does not hold its own shares. The total number of Stora Enso shares is 788,619,987 and the total number votes at least 236,858,985. Stora Enso The forest is at the heart of Stora Enso, and we believe that everything made from fossil-based materials today can be made from a tree tomorrow. We are the leading provider of renewable products in packaging, biomaterials, and wooden construction, and one of the largest private forest owners in the world. In 2024, Stora Enso had approximately 19,000 employees, and the Group sales were EUR 9 billion. Stora Enso's shares are listed on Nasdaq Helsinki Oy (STEAV, STERV) and Nasdaq Stockholm AB (STE A, STE R). In addition, the shares are traded in the USA OTC Markets (OTCQX) as ADRs and ordinary shares (SEOAY, SEOFF, SEOJF). storaenso.com (https://www.storaenso.com/en/investors/governance/annual -general-meeting) STORA ENSO OYJ Investor enquiries: Jutta Mikkola SVP Investor Relations tel. +358 50 544 6061