Stora Enso Oyj

Major Shareholding Notification • May 8, 2025

Disclosure 458966

Stora Enso Oyj - Major shareholder announcements

Stora Enso Oyj: Notification of Change in Holdings according to Chapter 9, Section 10 of the Finnish Securities Markets Act (6 May 2025)

STORA ENSO OYJ STOCK EXCHANGE RELEASE 8 May 2025 at 19:25 EEST Stora Enso Oyj received a notification pursuant to chapter 9, section 5 of the Securities Market Act from T. Rowe Price Group, Inc. on 8 May 2025. On 6 May 2025, T. Rowe Price's holding in Stora Enso's shares increased above the 5 percent threshold. T. Rowe Price Group informed Stora Enso that the total beneficial ownership is over 5%, while the ownership of voting rights remains below 5% at this time. +----------------+--------------+-----------------------------+-------------+ | |% 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 |5.04% | |5.04% | |situation on the| | | | |date on | | | | |which threshold | | | | |was crossed or | | | | |reached | | | | +----------------+--------------+-----------------------------+-------------+ |Position of | | | | |previous | | | | |notification | | | | |(if applicable) | | | | +----------------+--------------+-----------------------------+-------------+ 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 39775490 5.04% SUBTOTAL A 39775490 5.04% Stora Enso has two series of shares. Each A share and every ten R shares carry one vote. Stora Enso has 175,552,334 A shares and 613,067,653 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 236,859,099. Investor enquiries: Anna-Lena Åström SVP Investor Relations tel. +46 70 210 7691 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: Anna-Lena Åström SVP Investor Relations tel. +46 70 210 7691