4. Idea Cellular
Ownership: Privately-held by Aditya Birla group and others.
Date of Establishment: 1995
Market Share: 11.90 percent

Brief Description: Idea Cellular is an Indian telecom service provider headquartered in Mumbai. Previously ran by Tata Cellular, it was bought by Birla-AT&T in 2000. This merger of Birla-Tata-AT&T was popularly known as Batata and was rebranded as IDEA. However, in the subsequent years, AT&T and Tata sold their stake in Idea and it became an entity of Aditya Birla group. The three companies held an equal stake in the company before AT&T decided to sell its stake. Both Tata and Birla bought AT&T’s stake with 16.45 percent each. Tata was still holding Idea when the company filed for a license to operate in Mumbai. For this reason, Idea could enter late in Mumbai after the intervention of the Department of Telecom. Tata left Idea but only for a major sum of money cmounting to 44 billion. Currently, Birla’s hold 49.05 percent shares in Idea and the remaining is held by Axiata Group and Providence equity.

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