Coal India Ltd, Hindalco Industries and NMDC are among the major companies set to announce their earnings this week.
The valuation of TCS tumbled Rs 26,900.6 crore to Rs 6,22,401.90 crore, making it the top loser among the pack.
The 30-share Sensex briefly turned positive to hit a fresh intra-day high of 40,749.33
Top losers in the Sensex pack included Sun Pharma, HUL, Bharti Airtel, NTPC, PowerGrid and RIL, shedding up to 1.69 pc.
After hitting a record intra-day high of 40,688.27, Sensex ended 183.96 points, or 0.45 per cent higher at 40,653.74.
The 30-share index was trading 202.93 points, or 0.50 per cent, higher at 40,672.71.
The India's largest private airline had reported its highest-ever quarterly profit of Rs 261.7 crore for the June quarter.
The broader NSE Nifty briefly reclaimed the 12,000 level, before finishing at 11,966.05, showing a gain of 48.85 points, or 0.41 per cent.
The 30-share index rallied to trade 332.85 points, or 0.83 per cent, higher at 40,581.08 in afternoon session.
Tech Mahindra, Yes Bank, Infosys, Vedanta, M&M and L&T too fell up to 1.13 per cent.