Change in total number of shares in Opcon AB

Regulatory News:

Opcon AB (STO:OPCO):

With reference to chapter 4 section 9 of the Swedish law (1991:980) regulating trading in financial instruments, Opcon hereby announces that the number of shares in Opcon AB as of 28 December 2012 amounts to 297,885,276, an increase of 167,714,141 shares compared with last month. The increase is due to newly issued shares in connection with Opcon’s preferential rights issue.

Opcon AB, Box 15085, 104 65 Stockholm, Sweden

Tel. +46 8-466 45 00, fax+46 8-716 76 61

e-mail: info@Opcon.se www.Opcon.se

The Opcon Group

Opcon is an energy and environmental technology Group that develops, produces and markets systems and products for eco-friendly, efficient and resource-effective use of energy.

Opcon has activities in Sweden, Germany and the UK. There are around 150 employees. The company’s shares are listed on Nasdaq OMX Stockholm. The Group comprises one business area:

Renewable Energy focuses on the following areas: electricity generation based on waste heat, bioenergy-powered heating and CHP plants, pellets plants, drying of biomass, handling systems for biomass, sludge and natural gas, industrial cooling, flue gas condensation, treatment of flue gases and air systems for fuel cells.

Opcon AB (publ) is obliged to disclose the information in this press release in accordance with the Swedish law governing the securities markets and/or trading in financial instruments. The information was submitted for publication at 16.00 (CET) on Friday 28 December 2012.

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