The agency had registered the case last year naming Kalmadi and other senior officials of the Organising Committee of CWG, CBI sources said.
They said Kalmadi is likely to be called this week in connection with the probe.
The sources said the Mauritius-based company EKS was allegedly given three contracts worth over Rs 70 crore by the committee for giving consultancy on issues like venue development and management, games workforce planning and project management services.
Kalmadi is already facing a number of cases relating to alleged corruption during the conduct of Commonwealth Games which are under the probe of the agency.