Shares of the company ended with a gain of 0.66 per cent at Rs 2,930.75 on the NSE. During the day, it went up by 1.60 per cent to Rs 2,957.95.
The company's market valuation stood at Rs 19,78,794.25 crore.
In the broader equity market, the 30-share BSE benchmark climbed 195.42 points or 0.27 per cent to settle at 72,500.30, and the Nifty went up by 31.65 points or 0.14 per cent to 21,982.80.
Under the deal, coming just over a month after the failed USD 10 billion merger of rivals
Disney will hold the remaining 36.84 per cent, the companies said in a statement on Wednesday.
Reliance has also agreed to invest at closing Rs 11,500 crore into the joint venture to give it the muscle to fight rivals such as Japan's Sony and Netflix.
Media ventures of Reliance are housed in Network 18, which owns TV18 news channels as well as a plethora of entertainment (under the 'Colors' brand) and sports channels. NW18 also has stakes in moneycontrol.com, bookmyshow and publishes magazines.
Its subsidiary NW18 owns news channels CNBC/CNNNews.
Reliance separately owns a movie production arm - JioStudios, and majority stakes in two listed cable distribution companies, Den and