The market for venture-backed IPOs has been pretty dead so far this year. But based on new filing activity, it looks like there’s some optimism things will improve.

At least six venture-backed companies have filed to go public since the start of the year, in sectors ranging from enterprise software to semiconductors to car rentals. Altogether, they’re seeking to raise $775 million from public markets to fund their expansion.

VCs stand to earn some substantial paper returns on these offerings as well. In the following slideshow, we look at each new 2012 addition to the IPO pipeline, its venture backers, and how much private capital has been raised to date.

China Auto Rental

Location: Beijing

Business: Operates China’s largest car rental operation.

IPO: Seeking up to $300 million in an offering on the New York Stock Exchange.

Funding: Backed by Legend Capital and Kleiner Perkins Caufield & Byers. Legend invested $178 million in the company in 2010.