The offer price of $43.3 per share is at an 18% premium to the stock's closing price on July 2, the last trading day before Sina received the preliminary offer of $41 per share.

U.S.-listed shares of Sina rose more than 6% in premarket trading.

Chao's holding company, New Wave, is the largest shareholder of Sina, with a 12.15% stake as of July 10, according to Refinitiv-Eikon data.

Many Chinese companies are opting out of U.S. stock exchanges, following rising tensions between the world's two largest economies, by considering go-private deals or returning to equity markets closer to home.

E-commerce firms Alibaba and JD.com have completed secondary listings in Hong Kong. Others including travel firm Ctrip and Baidu were considering Hong Kong listings, Reuters reported earlier this year.

Sina said Morgan Stanley Asia Ltd is acting as a financial adviser to the special committee it had formed to evaluate the proposal.

The deal is expected to close during the first quarter of 2021, Sina said.

(Reporting by Munsif Vengattil and Ayanti Bera in Bengaluru; Editing by Arun Koyyur and Anil D'Silva)