The stock declined 3.73 per cent to end at Rs 495.15 on the BSE. Intra-day, it slumped 6.67 per cent to Rs 480.
Bharti Airtel was the worst hit among the 30 Sensex blue-chips.
At NSE, shares of the company dropped 3.7 per cent to close at Rs 495.30.
The company's market valuation also declined by Rs 7,674.73 crore to Rs 1,97,931.27 crore.
Qatar Foundation today sold its 5 per cent stake in India's largest telecom services company for over Rs 9,500 crore.
The offer price was at a discount to yesterday's closing price of Rs 514.35 on the BSE but higher than the Rs 340 it had paid for the shares in 2013.
The company now holds nil shares in Bharti Airtel.