When you close Voting Round Two, confirm that, and have a list ready.
I'd suggest:
MY FAVORITE: Nomadic (And *VERY* small) nation. Uses several large spaceships to travel around, with gigantic planetary-simulation sections that resemble their homeworld, having a fake day/night cycle, fake sun, temperature and humidity, and many different types of flora and fauna. Where that planet is, however, a privileged few only know. Each spaceship contains many hangars and could, in a pinch, contain the entire nation. They have fleets of smaller vessels that they use to contact others. The fleet travels together, and none of the massive worldships is ever seen by outsiders. Not for long, anyway. Each worldship is a conglomeration of parts from smaller vessels that were destroyed or demolished as they went obsolete. However, each one is kept in meticulous repair, for this nation is not foolish, though they may not be the wealthiest around.
Others:
Merchant Marine Space!
A corporation with....less than legitimate methods that is based off of a very large spacecraft. Different divisions get different parts, or get shifted off to smaller starships entirely. It moves around. Quite often. Especially after the megalomaniacal CEO or the insane Board of Directors takes offense to a planetary goverment's actions and sends the elite mercenaries after them. Or calls up the Assassin League....or those blasted bounty hunters.
Piracy Is Not Illegal Everywhere
A massive group of semi-pirates, you steal from the annoying and give to...No, actually, you steal from anybody wealthy and corrupt, and keep it all for yourselves. But you have a fleet of decent-sized space ships, and lots and lots and lots of guns! Also, your families travel with you, and you have a couple of legitimate businesses that you keep on the side, for those times when you can't find anybody to rob.