There is some overlap between stock/non-stock and for-profit/not-for-profit in that not-for-profit corporations are always non-stock as well. A for-profit corporation is almost always a stock corporation, but some for-profit corporations may choose to be non-stock. To simplify the explanation, whenever “stockholder” or “shareholder” is used in the rest of this article to refer to a stock corporation, it is presumed to mean the same as “member” for a non-profit corporation or for a profit, non-stock corporation.