Wärtsilä Corporation, Company announcement, 31 January 2012, at 12.45 pm (EET) Wärtsilä is pleased to announce that the Scheme of Arrangement with regards to the acquisition of Hamworthy has become effective and the control of Hamworthy has been transferred to Wärtsilä as of today, 31 January 2012. The associated Reduction of Capital was confirmed at a Court hearing on 30 January 2012 in London, United Kingdom and the trading of Hamworthy shares has ceased today. In November 2011, Wärtsilä announced that it had reached agreement with the Board of Hamworthy in regards to a recommended cash offer for the acquisition of Hamworthy, a global provider of specialist equipment and services to the marine, oil & gas and industrial sectors. The acquisition of Hamworthy will enhance Wärtsilä's capabilities in the offshore, marine gas applications, and environmental solutions markets and it will provide important synergies. Hamworthy will be integrated as a business unit within Wärtsilä's Ship Power business. More information about the recommended acquisition of Hamworthy. For further information, please contact: Atte Palomäki Group Vice President, Communications & Branding Wärtsilä Corporation Tel: +358 10 709 5599 atte.palomaki@wartsila.com For investor information, please contact: Pauliina Tennilä Director, Investor Relations Wärtsilä Corporation Tel: +358 40 570 5530 pauliina.tennila@wartsila.com Wärtsilä in brief Wärtsilä is a global leader in complete lifecycle power solutions for the marine and energy markets. By emphasising technological innovation and total efficiency, Wärtsilä maximises the environmental and economic performance of the vessels and power plants of its customers. In 2011, Wärtsilä's net sales totalled EUR 4.2 billion with approximately 18,000 employees. The company has operations in nearly 170 locations in 70 countries around the world. Wärtsilä is listed on the NASDAQ OMX Helsinki, Finland. www.wartsila.com [HUG#1581343]