Ren, two things: One, since they're are a private company, who can know that except them, unless they've filed share "documents" with the SEC. Two, IF WSGI holds a large percentage of the stock in that company, be it a public or in this case, a private company, they nevertheless have to disclose that to its (WSGI's) shareholders.
JMHO
I'm not saying, i'm asking. Just thinking out loud.