Here's how to find that number. Check your broker's website for shares data if not on financials.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. Shares that are issued are outstanding shares until they are reacquired, redeemed, converted, or canceled. This booklet is designed to provide information and assist corporations in filing their Georgia corporate tax returns.