Total Common Shares Outstanding represents the number of primary common shares equivalent outstanding. When a company has more than one type of common shares outstanding, the number of shares outstanding for each category is collected and displayed using Shares Outstanding – Common Stock Primary Issue, Shares Outstanding – Common Issue 2, Shares Outstanding – Common Issue 3, and Shares Outstanding – Issue 4. Then, each of issues 2, 3, and 4 is converted to the equivalent of the Primary Issue and are aggregated to derive Total Common Shares Outstanding.