Ant Financial Services Group, operator of China's biggest online payment platform, said it raised around $14 billion in what market watchers called the biggest-ever single fundraising globally by a private company.
The cash will boost Ant's firepower ahead of a widely expected initial public offering (IPO) in Hong Kong and mainland China as early as next year.
However the company has neither publicly set a timetable nor chosen a likely stock exchange.
The exercise amounted to the largest confirmed single fundraising round in history, according to data provider Crunchbase.
Ant Financial, spun off from Alibaba Group Holding before the e-commerce firm's 2014 listing, has played a major role in shaping China's financial technology landscape.
It oversees the largest mobile payment app in what is increasingly becoming a cash-less society.
In a statement, Ant said the funding included both US dollar and Chinese yuan tranches. The dollar share made up over $10 billion, said people with knowledge of the matter.
Ant listed Singaporean sovereign wealth fund GIC and state investor Temasek Holdings as well as US private equity firm Warburg Pincus as participants in the dollar tranche.
Other global investors included Malaysian SWF Khazanah Nasional, Canada Pension Plan Investment Board and US private equity firms Silver Lake and General Atlantic, it said.
Ant did not release details of its valuation following the funding round. Reuters reported earlier that Ant was likely to be valued at around $150 billion, making it one of the world's most valuable financial firms.
"It's the most uniquely positioned TechFin company in the world," said Ben Zhou, a managing director of Warburg Pincus, who led the firm's investment in Ant.
Participants in the yuan tranche were mainly existing shareholders, Ant said.
Among them was China-focused private equity firm Boyu Capital, which invested in both the yuan and dollar tranches, said two of the people with knowledge of the matter, who declined to be identified as details were private.
Ant, in its statement, said it would use the funds to speed up globalisation plans for its Alipay payment platform and to invest in developing financial technology.
Figures seen by Reuters showed that in five years, Ant expects 65% of revenue to come from business-oriented financial technology including assisting banks and other institutions as well as providing fraud prevention services.
The emphasis on business comes as Ant shifts focus away from consumer finance in China amid increased regulatory scrutiny of financial risk.
Nevertheless, it aims to reach 2 billion consumers globally with its payments network in coming years, backed by investments and strategic partnerships with Southeast Asian payment firms as well as tie-ups in South Korea, Japan and India.
"Now, with the help of our partners, we are going to accelerate our strategy," Ant's chief executive Eric Jing said.
Aside from payments, Ant also offers consumer finance products including credit services, wealth management products and micro-loans.