“CBS Board Defies Shari Redstone,” The Wall Street Journal, May 18, 2018 B1. Board tries to reduce the control exercised by an 80% shareholder.
This is going to be fun to watch (if you’re not one of the other shareholders). Interesting question on what the controlling shareholder (and the Board) can and cannot do.
Here’s a subsequent post from another source, if you want background. Caution – heavily legal.