Firms in market economies are objects of purchase and sale, and purchases and mergers of them count as everyday business transactions. Ownership of firms in the Hungarian economy and purchases and mergers of them count as everyday business transactions, with ownership of such firms changing continually for the past two decades. Initially the typical form of change was privatization of state property, but ownership changes within the privately owned sector have steadily spread to become almost the exclusive form since the completion of privatization. The paper is concerned with market events in the new, developing type of transaction. Takeover processes in this country show the appearance of investment and transaction types typical of market economies, along with a system of regulating and monitoring them. But there is still only fragmentary information available on the effects these transactions have on competitive position and corporate performance.