In my experience both as that employee, and sometimes the executive - they're not. There are frequently legal, secrecy, or other corporate reasons for the lack of disclosure. It kinda sucks - but it's understandable.

To be fair, I'm someone who has never chosen shares over base salary. The equity slot machine is fine, but I (firmly) believe that over the long haul, the only thing that matters is index investing. Benjamin Graham is always right.

I appreciate shares - I work either way. They're just not my motivation. If that works for others - great.