China's Ant Financial Services Group is in talks with investors to boost its fundraising target to at least $8 billion, which could see its valuation jumping to about $150 billion, people with knowledge of the plan said.
Singapore state investor Temasek Holdings is likely to be the lead investor in the latest round of equity raising by the company, controlled by Alibaba Group Holding Ltd founder Jack Ma, three people said.
Reuters reported in February that Ant, owner of China's top online payment platform Alipay, was planning to raise up to $5 billion, which could value the firm at more than $100 billion.
The fundraising plan comes ahead of an expected stock market flotation, though Ant has neither set a timetable for the initial public offering nor has it chosen any location for the same.
One of the people said Ant could end up raising between $8 billion and $10 billion as a result of strong investor demand.
All the people spoke to Reuters on the condition that they not be named as the fundraising details were confidential. Ant and Temasek declined to comment. Alibaba did not respond to a Reuters request for comment.
A pre-IPO round is an increasingly common move by sought-after Chinese companies to establish valuations and widen their investor base ahead of going public.
A $150 billion valuation would make Ant one of the biggest public flotations ever, dwarfing this year's launch of Spotify and Dropbox. It would compare to the $104 billion float of Facebook six years ago or Alibaba's own $168 billion valuation in 2014.
Ant's last fundraising in April 2016 valued the company, seen by some analysts as one of the most valuable Alibaba assets due to its unique position in Chinese e-commerce, at about $60 billion.
Shares in e-commerce giant Alibaba rose 4.3 percent in New York on Tuesday.
Alibaba said in February it was taking a 33 percent stake in Ant, replacing the previous system where it received 37.5 percent of Ant's pre-tax profit, in what was viewed as an important step ahead of any IPO.
"Part of the increase in valuation might be because the new investors have received extra features," said Jay Ritter, an IPO expert and professor at the University of Florida.
"But part of the increase is because the company is continuing to live up to expectations, and is becoming an even more important player in China's mobile payment space."
Temasek has expanded its tech investments in the last few years and recent deals include Chinese facial recognition technology developer SenseTime Group and Indonesian ride-hailing firm Go-Jek.
The Wall Street Journal reported on Tuesday that Ant was planning to raise $9 billion in its planned round of funding, potentially valuing the company at $150 billion.
The WSJ said it was expected to list on both domestic and overseas exchanges, in line with speculation that it would list in both Hong Kong and New York.
Appetite among U.S. investors has been strong this year for tech sector debuts by Dropbox, Spotify and Zscaler, easing concerns raised by the fall in Snap Inc's shares last year.
Alibaba set up Alipay in 2004, modelling the business on PayPal, to help Chinese buyers shop online, and in 2011 controversially spun it off and rebranded the payment processor into Ant Financial three years later.
After becoming a dominant payments company in China, Ant Financial focused on international markets by buying a stake in Indian payment firm Paytm and Thai financial technology firm Ascend Money.
Its attempt to buy U.S. money transfer company MoneyGram International was, however, blocked at the start of this year by U.S. officials on national security grounds, a blow to Ma who had promised President Donald Trump that he would create 1 million U.S. jobs.
Current shareholders in Ant include large state-owned institutions such as China Life Insurance and China Post Group, parent of Postal Savings Bank of China.