No details were available on what India's wealthiest man discussed with the Prime Minister. Reliance Industries (RIL) offered no comments on the meeting.
Separately, RIL wrote to the oil ministry requesting for a copy of the draft report of the Comptroller and Auditor General (CAG), after which the relevant portions of the draft CAG report were provided to the company, sources said.
RIL earlier this week had written to the ministry saying that the reported comments from the leaked report reflected a "complete misunderstanding of legal and contractual issues" and hurt its reputation.
RIL shares have fallen 8 per cent since the draft CAG report first appeared in media on June 13. It ended almost flat today at Rs 870.40 even though the BSE Sensex rose 513 points or 2.89 per cent.
Officials in the Prime Minister's Office (PMO) said the meeting between Singh and Ambani happened around noon but offered no further details.
Ambani, however, did not seek any meeting with Oil Minister S Jaipal Reddy who had earlier this week stated that his ministry will approach the draft report of the nation's top auditor with an "open mind" and give its response within eight weeks.
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