Stora Enso Oyj

Major Shareholding Notification • May 20, 2024

Disclosure 447041

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 (17 May 2024)

STORA ENSO OYJ STOCK EXCHANGE RELEASE 20 May 2024 at 16:40 EEST Stora Enso Oyj received a notificationpursuant to chapter 9, section 5 of the Securities Market Act fromBlackRock, Inc on 20 May 2024. On 17 May 2024, BlackRock's total holding, including holding through financial instruments, in Stora Enso's shares fell 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 |4.99% shares |0.11% shares |5.10% shares | |previous | | | | |notification |Below 5% |Below 5% voting rights |Below 5% voting| |(if applicable) |voting rights | |rights | +----------------+--------------+-----------------------------+---------------+ A: Shares and voting rights Class/type of Number of % of shares shares and shares voting and voting ISIN code (if rights 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 shares 5% shares Below 5% voting Below rights 5% voting rights SUBTOTAL A Below 5% Below 5% shares shares Below 5% Below 5% voting voting rights rights B: Financial Instruments according to SMA 9:6a Type of Expiration Exercise/ Physical Number % of financial date Conversion or of shares instrument Period cash shares and settlement and voting voting rights rights American N/A N/A Physical Below 5% Below 5% Depositary shares shares Receipt (US86210M1062) Below 5% Below 5% voting voting rights rights Securities N/A N/A Physical Below 5% Below 5% Lent 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 175,938,609 A shares and 612,681,378 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 237,206,746. Part of the global bioeconomy, Stora Enso is a leading provider of renewable products in packaging, biomaterials and wooden construction, and one of the largest private forest owners in the world. We create value with our low-carbon and recyclable fiber-based products, through which we support our customers in meeting the demand for renewable sustainable products. Stora Enso has approximately 20,000 employees and our sales in 2023 were EUR 9.4 billion. Stora Enso shares are listed on Nasdaq Helsinki Oy (STEAV, STERV) and Nasdaq Stockholm AB (STE A, STE R). In addition, the shares are traded in OTC Markets (OTCQX) in the USA as ADRs and ordinary shares (SEOAY, SEOFF, SEOJF). storaenso.com/investors STORA ENSO OYJ Investor enquiries: Anna-Lena Åström SVP Investor Relations tel. +46 70 210 7691