Chinese ecommerce giant Alibaba Group Holding is expected to file the prospectus for its US initial public offering next week, sources have said, moving closer to what could be the biggest-ever listing by a technology firm.

Alibaba's documents could be filed as soon as Monday, added the sources, who could not be named because the plans are not yet public. 

The IPO could be worth more than $16 billion, surpassing the previous record for a technology share sale set by Facebook in 2012, Reuters previously reported.

Alibaba had no comment to make on its IPO filing, a spokeswoman said.