The country's 10 most-valued firms added over Rs 40,000 crore to their market capitalisation last week with Reliance Industries (RIL) accounting for over one-third of the total gain.

The 10 most-valued firms added Rs 41,538 crore to their valuation in the week ended May 8, taking the total market capitalisation of the elite club to Rs 12,89,157 crore.

Corporate behemoth RIL added Rs 14,841 crore to its market cap last week, taking its valuation to Rs 2,98,549 crore. The valuation of the Mukesh Ambani-led firm was at Rs 2,83,709 crore a week ago.

Shares of RIL surged over 5 per cent to end at Rs 1,897 on BSE last week. However, amid overall gains in the broader market, three firms — NTPC, BHEL and ITC — lost a combined Rs 777 crore in a week. At the end of Friday's trade, power utility NTPC witnessed an erosion of Rs 289 crore from its valuation to Rs 1,56,499 crore.

BHEL lost Rs 206 crore and FMCG major ITC Rs 283 crore.

Besides, mining giant NMDC gained Rs 12,667 crore during the week and moved up four places to the fifth slot in the premier club. NMDC's valuation stood at Rs 90,950 crore at the end of trade last week.

State-run oil major Oil and Natural Gas Corp (ONGC) added Rs 3,721 crore and MMTC gained Rs 3,830 crore in their valuation respectively. The market cap of ONGC, the most valued PSU entity, stood at Rs 1,88,840.83 crore.

Telecom services provider Bharti Airtel and State Bank of India (SBI) added Rs 3,435 crore and Rs 3,012.5 crore respectively to their valuation last week. IT bellwether Infosys added Rs 807 crore to its valuation and dropped by a notch to the sixth place in the top-10 club. Apart from the 10 most-valued firms, two private sector lenders — ICICI Bank and HDFC Bank — added Rs 4,770 crore and Rs 1,820.62 crore last week. ICICI Bank's and HDFC Bank's market capitalisation stood at Rs 53,186 crore and Rs 46,821 crore respectively.

RIL, the numero-uno in the list, is followed by ONGC (Rs 1,88,840 crore), NTPC (Rs 1,56,498 crore), Bharti Airtel (Rs 1,45,671 crore), NMDC (Rs 90,950 crore), Infosys (Rs 87,148 crore), MMTC (Rs 85,624 crore), SBI (Rs 84,131 crore), BHEL (Rs 80,650 crore), ITC (Rs 71,091 crore).

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