Blogs are not owned by companies or organizations. When we register a username account we provide an email address and it become our unique identifier. When we are logged in under that username account every blog we register is registered under it. There is only one blog owner and it is the person who registered the username account and the blog and who is the original Admin of the blog.
The only way the blog ownership can be changed is for that person to transfer the blog to another username account by using this process > http://en.support.wordpress.com/moving-a-blog/#transferring-your-blog-to-another-user-or-account