Weighted Average Shares Outstanding. Firm A had the following common stock transactions: January 1 April 1 July 1 October 1 100,000 shares outstanding .issues 100,000 shares ..3 for 1 split ..purchased 300,000 shares of treasury stock What is the weighted average number of shares outstanding? Firm B had the following common stock transactions: January 1 .100,000 shares outstanding April 1 July 1 10 percent stock dividend .2 for 1 split October 1 ..purchased 200,000 shares of treasury stock What is the weighted average number of shares outstanding?