Read our definition to see why this number can change over time. This form is for general instructions that apply to all corporation tax forms.It includes a variety of topics about how to fill out your form. Nassau Companies Of New York Company Info. What happened to Phoenix stock as a result of the Nassau transaction? Nassau purchased all outstanding shares of Phoenix. The formula for calculating the shares outstanding consists of subtracting the shares repurchased from the total shares issued to date. The number of shares outstanding can also be found in the capital section of a company's annual report. What form(s) do I need to fill out? What document(s) do I need to bring?