Canadian Satellite Radio Holdings Inc. (CSR), which offers satellite radio service in Canada under the XM Canada brand, said Dec. 12 it completed its Cdn. $55 million ($47.7 million) initial public offering of stock. Shares, traded on the Toronto Stock Exchange under the symbol XSR.SV, were valued at Cdn. $16 ($13.89). The stock closed at Cdn. $14.50 ($12.60) after its first day of trading.