RANKED: The worst and best tech IPOs for investors in 2015

Some companies like Fitbit and Atlassian made splashes with above-average performance and a ton of enthusiasm from Wall Street.

But this was also the year that so-called "unicorn" startups like Box, Square, and Apigee went public with market caps well below their last private valuations of more than $1 billion.

The tech IPO pipeline was pretty anemic, too, with lots of companies opting to stay private longer and raise more venture cash, rather than weather the chilly winds of the public markets. Next year is looking better, IPO-wise, but this year was slow.

Here's how some of the hottest and most-watched companies in tech did with their IPOs in 2015, calculated by comparing their initial price offering to their market close price on December 23rd, 2015.