Orc Software invites you to an analyst and press conference and a teleconference January 26

CEO Jonas Lindström and EvP COO Lars Johansson present and comment on the year-end report for 2004. Analyst and press conference January 26 at 2 p.m. CET (in Swedish) The analyst and press conference is held at 2 p.m. CET at Finlandshuset, Snickarbacken 4, Stockholm. Register at e-mail ir@orcsoftware.com or phone +46 8 407 38 00 no later than January 24, 2005. Telephone conference January 26 at 4 p.m. CET (in English) Orc Software also invites you to a telephone conference at 4 p.m. CET. International participants call: +44 (0) 20 7162 0185 Swedish participants call: +46 (0)8 505 201 14 (Note: Callers in Stockholm and London should also dial the respective area code.) Slides can be viewed at http://www.orcsoftware.com/Company/IR/Presentation.htm Register at e-mail ir@orcsoftware.com or phone +46 8 407 38 00 no later than January 24, 2005.

About Us

Orc is the global market leader in trading technology for listed derivatives. Building on our commitment to long term partnerships and technology innovation that delivers results, Orc serves the trading and electronic execution needs of clients worldwide. Leading trading firms, market makers, banks and brokers depend on Orc to provide robust solutions that deliver concrete value, ensuring that they achieve their business goals in the world's increasingly dynamic and competitive markets. With nearly 200 customer sites in more than 30 countries, access to over 150 trading venues and offices in each of the world's key financial centers, we offer true global capabilities. Combining our technology and financial industry expertise, including a solid understanding of regulatory issues, Orc also provides expert advice and services that help reduce complexity and cost, while enabling clients to stay focused on value creation in their core businesses. Orc is owned by Orc Group Holding AB which in turn is owned mainly by Nordic Capital Fund VII. www.orc-group.com