Uber posted an adjusted loss of more than $800 million in the third quarter, according to media reports that cited people familiar with the company's finances.
The results, The Information reported, put Uber on pace to record an 25 percent steeper operating loss than last year, of at least $2.8 billion in 2016, before interest, tax, depreciation and amortization.
Uber did not immediately respond for a request for comment, and its financial results are not publicly disclosed. Bloomberg also reported similar loss figures, citing a source.
Despite steep results from one of the world's most valuable start-ups, these results would have been worse if not for a one-time windfall thanks to the sale of Uber's China business to Didi Chuxing, The Information reported.
On the bright side, Uber's revenue is skyrocketing, and its rate of losses slowed from the prior quarter, The Information said.
Still, the report comes as Uber's multi-billion dollar valuation has come under scrutiny from those who say its business model depends on subsidies and faces looming battles over regulation.