Wellcraft, Scarab, FourWinns and Glastron have recently been purchased by the Beneteau group. Genmar went bankrupt a few years back...
http://www.boats.com/on-the-water/ne...llcraft-scarab
By the way, Beneteau makes a hell of a boat. They are the largest boat manufacturer in the world. Their sailboats are well known across the world, but their powerboats are just breaking through domestically. I expect that you will see a lot more of their powerboats in the US over the next few years. I'll be interested to see what they do with the four brands mentioned above.