Uber has confidentially filed to go public

Richard Drew/AP

Uber CEO Dara Khosrowshahi speaks during the company's unveiling of the new features in New York, Wednesday, Sept. 5, 2018.

Uber has confidentially filed an S-1 document in preparation to hold its long-awaited IPO, according to a report from The Wall Street Journal.

The report comes just days after Uber's arch-rival, Lyft, also filed its initial paperwork to go public, and the two are now racing to be the first to float in 2019.

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According to the WSJ's report, Uber might go public "as soon as the first quarter," and it is calling the planning "Project Liberty."

Uber did not immediately respond to Business Insider's request for comment.

This story is developing...