Billionaire Mukesh Ambani's firm had on April 30 announced fund raising of Rs 53,125 crore by way of a 1:15 rights issue, the first such issue by RIL in nearly three decades.
One share will be offered for every 15 shares held at Rs 1,257, a 14 per cent discount to the closing price for April 30.
RIL's share price has since risen to Rs 1,561.80 (Friday's closing price), but rights issue price remains the same.
"We inform you that the Rights Issue Committee constituted by the Board of Directors of the company has, at its meeting fixed Thursday, May 14, 2020 as the 'Record Date' for the purpose of determining the equity shareholders entitled to receive the rights entitlement in the rights issue," the firm said in a regulatory filing.
The rights issue opening and closing dates will be informed separately, it added.
Typically, cash-strapped companies use rights issues to raise money when they really need it.
In rights offerings, companies grant shareholders the right, but not the obligation, to buy new shares at a discount to the current trading price.
The last time RIL tapped the public for funds was in 1991 when it had issued convertible debentures. The debentures were subsequently converted into equity shares at Rs 55 apiece. ANZ RVK