RIL ended 1.36 per cent higher at Rs 1,088.25 after Reliance Jio announced new tariff plans.
The Sensex rallied 100.01 points, or 0.35 per cent to close at 28,761.59. Intra-day, it hovered between 28,597.33 and 28,801.
The index had gained 506.02 points in the previous three sessions.
The 50-share NSE Nifty ended 28.65 points, or 0.32 per cent, higher at 8,907.85, its highest closing since September 8, 2016 when it had settled at 8,952.50.
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