Mumbai: The combined market capitalisation (M-Cap) of five of the country's top-10 firms have surged by Rs 22,493.14 crore during last week. State-run Coal India emerged as the biggest contributor.

The market cap of Coal India swelled by Rs 11,053.63 crore to Rs 2,44,285.22 crore in the week gone by.

Last week, the Maharatna PSU reported 24.2 per cent jump in standalone net profit at Rs 4,696 crore for 2010-11, on account of increase in sales and dividend from subsidiary companies.

The company had a net profit of Rs 3,779 crore in 2009-10.

After CIL, telecom giant Bharti Airtel emerged as the second best performer, as it added Rs 6,246.92 crore to its m-cap which stood at Rs 1,39,444.93 crore as on Friday's trade on the BSE.

Diversified business group ITC, too, saw its valuation going up by Rs 4,681.56 crore to Rs 1,46,637 crore.

State-run firms SBI and NTPC also witnessed addition in their respective M-Cap, with the former adding Rs 387.35 crore to its market valuation which stood at Rs 1,68,212.03 crore, while the latter saw an advance of Rs 123.68 crore to Rs 1,44,336.78 crore.

In contrast, Reliance Industries, ONGC, TCS and others saw decline in their respective market cap.

Corporate leader Reliance Industries' market worth slipped by Rs 2,209.66 crore to Rs 3,10,548.17 crore, while state-owned ONGC lost Rs 1,069.43 crore to Rs 2,60,685.48 crore.

Two of the IT bellwethers, TCS and Infosys Technologies, together lost Rs 3,691.18 crore from their combined market valuations. The m-cap of TCS stood at Rs 2,20,713.44 crore, while that of Infosys was at Rs 1,65,355.19 crore.

Top private sector lender ICICI Bank too saw a decline of Rs 650.83 crore from its market valuation which stood at Rs 1,23,909.88 crore.