Answer:
increase their ownership amount of the company
Explanation:
The main reason why shareholders would do this is to increase their ownership amount of the company. Each company only has a certain number of shares available, the entirety of this amount makes up the entire company. The more shares you own, the more of the company you own. Therefore, when there is excess cash flow many shareholders buyback more of their stocks in order to own more of the company, which they think will continue to grow and bring them more profits.
