How To Find Average Price Of Common Stock. In our example above, we'd start with 1,000 x $10 = $10,000 + 10 x $40 = $400 to get 1,010 shares at a. Divide the total by 12, the number of months in a year, to find the weighted average common shares outstanding.
You can determine this if you have access to the balance sheet, using just shares owned by investors, not any bought back by the business. Total shares bought = shares bought(1st) + shares bought(2nd) + shares bought(3rd) +. To calculate the average cost, divide the total purchase amount by the number of shares purchased to figure the average cost per share.