The US initial public offering market is entering its biggest week since 2015, with at least 15 deals expected to be priced, including that of Uber, the biggest IPO since Alibaba in 2014 and the biggest US company deal since Facebook in 2012.

Uber is expected to price its much anticipated offering on Thursday, just weeks after its ride-sharing rival Lyft, which has had a rocky start as a public company. Lyft’s shares have fallen 15% from their IPO price, given widespread concerns about the company’s ability to become profitable.