On October 19, 2005, the initial public offering (IPO) of 3,191,489 CBOT shares was priced at $54.00 (USD) per share.
Pada tanggal 19 October 2005, dilakukan penawaran umum perdana (IPO) atas 3.191.489 saham CBOT dengan harga 54.00 (USD) per saham.