String Format problem

Well I tried to return a string into the listbox, but the items doesn't align even.

This is my ToString, the three value is from getting value.

        public override string ToString()
        {
            return String.Format("{0,-25} {1,-7} {2,-1:F}", companyName, stock, date);
        }

Result on the listbox is

Publix         PUB   1/23/2003
Target Store      TS   1/23/2003