ImmunityBio Inc (IBRX)

[Poptech]

lesn: A tracking stock is still a 'traditional IPO.' It is just a discounted IPO.
However, the IPO market has taken a downturn since Soon-Shiong cancelled the Nanthealth IPO. At the going rate, there will only be a handful of IPOs in 2016.

"Based on the performance of IPO companies in 2015, I personally would not invest in an IPO," says Chris Hewitt, a partner in the Tucker Ellis law office in Cleveland. "Almost 77 percent of companies that went public in 2015 have stock prices below their IPO price, and the overall return for IPO stocks was 2 percent in 2015."
"IPO returns in 2015 and the first quarter of 2016 were negative."
"The IPO market has nearly evaporated; why go public in an extremely volatile market driven by a slower-demand environment?" says Rebecca Corbin, founder and managing partner at Corbin Perception, an investor relations research and advisory firm in Hartford, Connecticut. "Companies are likely waiting for the dust of earnings to settle and broader macro factors to abate. You probably won't see a robust IPO market until broader investor sentiment improves."

http://money.usnews.com/investing/articles/2016-03-10/what-to-expect-for-ipos-in-2016
My guess is that a Nanthealth IPO would be after they file the first 10K with NaviNet revenue, so after April 2017. That is assuming that NK settles their class action lawsuit by then. The best way to do that is find new revenue for NantKwest to raise PPS to at least $20.