Financial terms were not disclosed.
"This is an excellent addition to our portfolio," said Matthew Pearce, managing director of Diversified Exhibitions Australia, in a statement. "Diversified Exhibitions Australia serves a diverse group of industries, and we are excited to bring our expertise in event organizing to this growth market."
The next edition of the biennial energy event is scheduled for 2009 in Perth, Australia.
This is the latest is a series of deals. Recent acquisitions also include the Australian Fitness Expo, Retail Business Technology, Security Expo and Shopfit Display & Design.