Bloomberg is reporting that Uber is attempting to raise as much as $2.1 billion in a financing round that would value the car company at $62.5 billion. It cites sources who shared paperwork filed privately in Delaware. If true, the move comes just months after a private funding round that valued the company at more than $50 billion, and it propels the company into the position of the world's most valuable privately held startup. It will bring Uber's total venture funding to $12 billion.

In its final funding round, 17 months before going public, Facebook was valued at $50 billion. At the time, that figure was considered eye-popping. Despite the massive valuation, founder and CEO Travis Kalanick has no immediate plans for an initial public offering. Speaking at a tech conference in October, he said Uber was still in its "junior high" stage of development. He said talk of going public now is like "telling us to go to the prom."