Are they really all that related? The IPO process takes a while, so is it really that surprising that a bunch of companies might have overlapping periods of IP

Are they really all that related? The IPO process takes a while, so is it really that surprising that a bunch of companies might have overlapping periods of IPO activity? If a bunch of companies in the same sector, that compete with each other, went to IPO around the same time, that might be a _little_ weird, but this is largely just a coincidence. AirBnB has been anticipated for a while, Palantir needs the cash, and Corsair, well, I dunno what's really up there, but they're gonna try to IPO too. Either way, it mainly seems like a coincidence for these three.