Opcon publishes a third addition to its offer document

This press release may not, directly or indirectly, be distributed or published in the United States, Australia, Japan, Canada, Switzerland or South Africa. The offer is not directed to such persons whose participation is conditional upon the performance of prospectus, registration or other procedures in addition to those prescribed in Swedish law.

On 10 February 2010 Opcon submitted a public offer to the shareholders of Tricorona. The offer was one (1) newly issued Opcon share for 6.5 Tricorona shares. On 18 March 2010 Opcon published the offer document regarding this offer. On 24 March a first addition to the offer document was published and on 30 March a second offer was published. A third addition to the offer document is now available at www.opcon.se. This addition has been made following the press release published by Opcon on 31 March 2010 concerning the framework agreement Opcon signed with Svenska Foder and the press release published by Opcon on 07 April 2010 regarding Wallenius Marine.