The formula for calculating the shares outstanding consists of subtracting the shares repurchased from the total shares issued to date. The outstanding shares formula is represented as issued shares minus shares held in the company's treasury or treasury stock.In this video, we will study the definition, types of Outstanding Shares and its impact on investors. What are Outstanding Shares(stocks)? Here's how to find that number. Use only blue or black ink when completing your application. • Fill in the applicable ovals completely like this: . The weighted average of outstanding shares is a calculation that incorporates any changes in the number of outstanding shares over a reporting period. The Notes will be issued in fully registered form. Boeing Co Float Percentage Of Total Shares Outstanding Calculation.