From a recent question about how to figure out whether you are on a death march, this answer https://workplace.stackexchange.com/a/58835/36305 got me thinking.
As an employee in a non-management position, what kind of information not proactively shared by the company should you feel comfortable asking for, and why (as in why is it a legitimate thing to ask and you should you feel comfortable asking for it)? EDIT: And also, who would you ask?
The answer listed a lot of possibilities but because I don't understand the reasons for the legitimacy or lack thereof of asking for such information, I would feel incredibly uncomfortable asking for pretty much any of it.
At the same time (and this is really the spirit of my question), if I'm ever in a situation in which I start having doubts about the stability of a company I work for (and therefore the security of my employment), I would like to know if there are certain kinds of information I am legitimately entitled to, even if that information isn't shared directly by the company, such that I could make a maximally-informed decision about my future.
For the sake of limiting the scope of the question, I'm primarily interested in private companies; but insights about public companies and the differences between the two are welcome.