Wärtsilä Oyj Abp

Major Shareholding Notification • Mar 7, 2025

Disclosure 455939

Wärtsilä - Major shareholder announcements

Notification in accordance with the Finnish Securities Market Act Chapter 9 § 10: BlackRock, Inc.'s holding in Wärtsilä Corporation

Wärtsilä Corporation, flagging notification, 7 March 2025 at 17:00 EET Notification in accordance with the Finnish Securities Market Act Chapter 9 § 10: BlackRock, Inc.'s holding in Wärtsilä Corporation BlackRock, Inc. has informed Wärtsilä Corporation that it has crossed above the 5% disclosure limit on holding in shares and voting rights, excluding financial instruments according to SMA 9:6a, on 6 March 2025. Following the transaction, BlackRock, Inc. owns 5.03% of Wärtsilä's shares and voting rights, while its total holding in Wärtsilä Corporation corresponds to 5.49%. Total position of BlackRock, Inc. and its funds subject to the notification: % of % of shares Total of Total number of shares shares and voting both in % and voting rights of and rights issuer voting through rights financial instruments Resulting 5.03% 0.45% 5.49% 591,723,390 situation on the date on which threshold was crossed or reached Position of 4.86% 0.45% 5.32% previous notification (if applicable) Notified details of the resulting situation on the date on which the threshold was crossed or reached: A: Shares and voting rights Class / type Number of % of of shares shares and shares voting and rights voting rights Direct Indirect (SMA Direct Indirect (SMA 9:6 and 9:7) (SMA 9:5) 9:6 and 9:7) (SMA 9:5) FI0009003727 29,814,927 5.03% SUBTOTAL A 29,814,927 5.03% B: Financial instruments according to SMA 9:6a Type of Expiration Exercise / Physical or Number of shares % of shares financial date Conversion cash and voting rights and voting instrument Period settlement rights CFD N/A N/A Cash 2,692,362 0.45% SUBTOTAL B 2,692,362 0.45%