As previously touched on, Costco Wholesale is a growing business, which is encouraging. The growth of EPS may be the eye-catching headline for Costco Wholesale, but there's more to bring joy for shareholders. With company insiders aligning themselves considerably with the company's success and modest CEO compensation, there's no arguments that this is a stock worth looking into. We should say that we've discovered 1 warning sign for Costco Wholesale that you should be aware of before investing here.