Delisting is the process of removing a company's shares from trading on an exchange. For American companies, this often occurs due to an acquisition by a larger company. In the case of an acquisition, the shareholder receives shares of the acquiring company.*
For example: Xilinx was acquired by AMD, causing XLNX shares to stop trading. For each XLNX share, shareholders received 1.7234 shares of AMD (in our case, 1 AMD share and a fractional share in cash equivalent).
Thus, a holder of 100 XLNX shares will receive 172 AMD shares and $38.85 (0.34 fractional shares valued at $114.27), and the current XLNX shares will be removed (cancelled).
*For convenience and speed of calculations, instead of new shares (which are not yet available in Libertex), clients receive the cash equivalent of the value of the new shares.