The country's top 10 firms saw their total market capitalisation falling by Rs 5,168 crore last week, with Oil and Natural Gas Corporation losing the most among the pack.

The total market valuation of the elite club, comprising four private sector and six state-run companies, stood at Rs 16,83,045 crore in the week ended June 12 against Rs 16,88,213 crore in the previous week.

ONGC's market cap fell by Rs 11,518 crore to Rs 2,41,008 crore as shares of the company slipped by 4.56 per cent to close at Rs 1,126.80 on the Bombay Stock Exchange on Friday last week.

Among the 10 most valued firms of BSE, five firms -- ONGC, Minerals and Metals Trading Corporation, National Mining Development Corporation, State Bank of India and Bharat Heavy Electricals Ltd -- witnessed a drop in their respective market caps last week.

Meanwhile, other five firms - Reliance Industries Ltd, National Thermal Power Corporation, Bharti Airtel, Infosys Technologies and Larsen & Toubro -- saw their valuations rising last week.