An employee walks past a logo of Alibaba Group at its headquarters on the outskirts of Hangzhou, Zhejiang province, in this May 17, 2010 file photo. [Photo/Agencies]

Chinese e-commerce giant Alibaba Group Holding Ltd is expected to file the prospectus for its US initial public offering next week, sources said on Wednesday, 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 couldn't be named because the plans aren't yet public. The IPO could be worth more than $16 billion, surpassing the previous record for a technology share sale set by Facebook Inc in 2012, according to a previous media report.

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