EXCHANGE NOTICE, SEPTEMBER 15, 2021 SHARES STORA ENSO OYJ: SHARE CONVERSION A total of 1,209 A-shares converted into R-shares will be traded together with the old R-shares of Stora Enso Oyj as of September 16, 2021. Identifiers of Stora Enso Oyj's share: Trading code:STEAV ISIN code: FI0009005953 Orderbook id: 24359 Number of shares: 176,248,633 Trading code: STERV ISIN code: FI0009005961 Orderbook id: 24360 Number of shares: 612,371,354 Nasdaq Helsinki Oy, Surveillance, survo@nasdaq.com, +358 9 6166 7260