Generally they do. When you bought your stock, they must have come with a document outlining what are your rights within that company. Best try to find it and see what it says.
In practice, some comply to the rules and some others don't.
I frequented tutorialforums.com around 2004. It was quite big around at that time but sadly the site went down for months when they decided to rewrite their forum from scratch .
By the time it was up, most of the regulars already moved on.
In practice, some comply to the rules and some others don't.