I just did some more research, and actually, for many US states, you can request a copy of any corporation's annual report, which includes the # of authorized s

I just did some more research, and actually, for many US states, you can request a copy of any corporation's annual report, which includes the # of authorized shares. The information you actually need is the # of issued shares, which is some fraction of # of authorized shares. You will have to make an assumption as to what that fraction is. From personal experience running several startups, I would recommend using 70%. So, you need to: 1) Find out what state your employer's corporation is registered in 2) Request annual report from state's entity search website (e.g. https://icis.corp.delaware.gov/Ecorp/EntitySearch/NameSearch.aspx https://icis.corp.delaware.gov/Ecorp/EntitySearch/NameSearch...) 3) Calculate issued shares based on some assumed fraction of authorized shares.