Daniel Yergin, chairman of Cera, said the merger will create a "unique, independent, broadly based partnership" providing energy companies with "the most timely, precise and actionable analysis and data available".
Yergin will become a member of the executive leadership of IHS Energy and will continue to serve as chairman of Cera.
Ron Mobed, president of IHS Energy, said the new entity will be committed to "supporting and enhancing Cera's distinctive mission".