With an erosion of Rs 11,055 crore, ITC's market-cap declined to Rs 2,74,464 crore.
HDFC Bank's value slipped Rs 4,594 crore to Rs 1,74,123 crore, while ICICI Bank lost Rs 3,277 crore to Rs 1,42,084 crore.
The market-cap of Coal India fell Rs 2,463 crore to Rs 1,78,121 crore, while ONGC's value dropped by Rs 2,267 crore to Rs 2,78,566 crore.
Reliance soared by Rs 9,712 crore to Rs 3,05,156 crore in m-cap, the biggest gainer.
TCS added Rs 6,660 crore in value to Rs 4,19,079 crore and the m-cap of HDFC gained Rs 3,410 crore to Rs 1,39,682 crore.
The market valuation of Infosys rose by Rs 3,317 crore to Rs 1,90,388 crore and SBI saw its m-cap climb Rs 150 crore to Rs 1,42,166 crore.
In the ranking of top-10 firms, TCS was in the numero-uno position, followed by Reliance, ONGC, ITC, Infosys, Coal India, HDFC Bank, State Bank, ICICI Bank and HDFC.
The BSE Sensex ended the week with a gain of 19.53 points to 22,359.50, wiping out gains after reaching an all-time high of 22,620.65 on April 3.