Maran, a DMK nominee in the Union Council of Ministers, also claimed that no telecom company has ever invested in companies owned by his brother and media baron Kalanidhi Maran during his tenure as Telecom Minister between May, 2004 to May, 2007.
"I vouch that during my tenure as Minister of Communications and IT, I was totally impartial in taking decisions. I have not favoured any company over others. Neither any applicant company was allowed to jump the queue in grant of UASL licences nor there any loss to the exchequer," he said in a statement here.
The allegations are "totally untrue and malicious," he said.
Maran's statement came after Opposition parties like the BJP and AIADMK demanded his resignation in the wake of reports that Maran favoured Malaysia''s Maxis group which had bought Chennai-based Aircel when he was Telecom Minister.
The Minister said only companies fulfilling all the required conditions were given Letters of Intent in their own turn.
"Even the Comptroller and Auditor General of India (CAG) has not mentioned any loss to the exchequer on account of issue of licenses in my tenure," he said.
Maran said no telecom company "directly or indirectly had ever invested in any of the companies owned by my brother during my tenure as Telecom Minister." "I was not even a Minister, when M/s Astro invested in Sun Direct in December 2007 as I had resigned on May 13, 2007.
Needless to say, I own no shares or any fiduciary in any of these companies," he said in the statement.