New Delhi, Oct. 19 -- BlackRock Inc., Fidelity Management & Research, Capital Group and Allianz SE were among the investors taking anchoring stakes in Jio Platforms Ltd.'s $3.2 billion initial public offering, as Reliance Industries Ltd.'s telecom and digital services arm prepares for what's set to be India's biggest-ever share sale.

Investment bankers working on the transaction allocated 7.247 crore shares to anchor investors at Rs.1,119 apiece, the top end of the marketed range, raising Rs.8,110 crore ($854 million), according to an exchange filing.

Sovereign wealth funds including Abu Dhabi Investment Authority, Government of Singapore, Qatar Investment Authority and Norges Bank Investment Management also participated in the anchor b...