"Becoming a public company will enhance transparency to our stakeholders, including customers, business partners, employees, shareholders and regulators," said executive chairman Eric Jing.
Ant said it would pursue a dual listing both in Hong Kong and on Shanghai's one-year-old Star board, an exchange focused on technology that China hopes will rival Nasdaq.
The company was last valued at $150bn in mid-2018 after raising around $14bn from investors including Temasek, General Atlantic, Warburg Pincus and Baillie Gifford.
In recent transactions in secondary markets, small blocks of shares have changed hands at levels that imply a valuation of upwards of $200bn, according to several people familiar with the matter. PayPal, the US fintech company is valued at $204bn.
Ant has recently changed its name from Ant Financial to Ant Group, and has repeatedly stressed that it is a technology company, rather than a financial one.
But it retains a hefty footprint in China's financial system, with more than 600m users depositing funds into its Yu'E Bao money market fund. Providing digital financial services like wealth management, online lending and insurance contributed more than 50 per cent of its revenue in the year to the end of March.
Its Alipay app has slowly turned into a "superapp", or a hub for its growing ecosystem of services, from restaurant reviews to online shopping on Alibaba's Taobao marketplace.
In 2011, Jack Ma transferred Alipay — as Ant was then called — out of Alibaba into an entity that he controlled, triggering a dispute with Yahoo and SoftBank, two of Alibaba's largest shareholders at the time. Mr Ma said it was to comply with Chinese regulations prohibiting foreign ownership of financial businesses.
Mr Ma maintains his controlling stake in the company, but last year Alibaba swapped its right to 37.5 per cent of Ant's pre-tax profits for a 33 per cent equity stake after gaining approval from regulators.
The company has not yet made public its financial statements but Alibaba books some of its profit after a delay of one quarter, providing an estimate of its earnings.
Alibaba's first quarter financials implied Ant had an estimated Rmb15.5bn ($2.2bn) of profit during a slightly lengthened fourth quarter last year.