ABO-Group Environment NV

Major Shareholding Notification • May 27, 2011

PRESS RELEASE

Shareholder notification: Luc Leysen

21 February 2011 – 18h00 CET – Regulated Information

Antwerp –Thenergo (Euronext Brussels: THEB), a leading developer and operator of decentralized clean energy projects, received the following notification on February 10th, 2011:

Mr. Luc Leysen

• Date of threshold crossing: February 4th 2011
• Date of notification: May 27th 2011
• Shareholder: Luc Leysen
• Voting rights previous notification: 825.710
• Voting rights current notification: 825.710
• Percentage of voting rights: 2,88%
• Denominator: 28.633.631

Reason for notification – Passive threshold crossing below the lowest threshold of 3%

About Thenergo

Based in Belgium, Thenergo is fully integrated and independent developer and operator of sustainable energy projects. Thenergo creates value for its partners and shareholders as a one-stop provider of sustainable energy solutions, transforming renewable fuels into electricity and heat.

For more information, please contact:

Chris Belien CEO T.: +32 3 292 96 99 Chris.belien@thenergo.eu Gateway House, Brusselstraat 59 B-2018 Antwerp Belgium

This press release is made available through our corporate website www.thenergo.eu