Don't know for sure, but I think it's a good guess that EBI and Brunswick are not privately owned. Yet, there has to be somebody at the top (Chairman/President) that could be the face representing their respective companies at tournaments/championship matches on TV; etc..
However, I do believe Motiv is privately owned, so the Wilburs could be out front like the Chrismans. I think some of the Wilbur clan has attended past events, but not with consistency.
I remember years ago, you always saw Faball's Johnny Wonder and Dennis Baldwin in the front row at TV matches, much like you see the Chrismans today.