Uber's losses clocked in at $800m in the third quarter of the year, according to leaked documents.
It brings total losses to more than $2.2bn for the first nine months of the year, while revenues for the startup are expected to come in at $5.5bn for the year, according to the figures first reported by The Information, indicating the rate of losses is slowing.
It follows the startup's significant exit from China after selling its business in the country to Didi Chuxing in return for a stake in its rival in the country.
Uber has ploughed significant funds into other parts of the business this year, including UberEats, a food delivery service which opened its doors in London this year taking on homegrown Deliveroo, and its self-driving car technology centred in Pittsburgh.
The firm is valued at around $68bn and is expected to pursue a hotly anticipated IPO in the future, however, founder and chief has not been forthcoming on a time frame for such a move, saying earlier this year is would happen "as late as possible".