NYMEX Holdings Inc., the parent company of the New York Mercantile Exchange Inc., announced that it has filed for an initial public offering.

NYMEX said that it has filed a registration statement and a preliminary proxy statement with the U.S. Securities and Exchange Commission in connection with a proposed IPO of its common stock. In addition to the shares of common stock to be sold in the offering by NYMEX, additional shares may be included by existing stockholders.

The firm says that the timing of the IPO is dependent upon several factors, including market conditions, regulatory review and approval, as well as NYMEX stockholder approval.

The joint book-running managers of the offering are J.P. Morgan and Merrill Lynch & Co. The co-managers are Bank of America Securities LLC, Citigroup, Lehman Brothers and Sandler O’Neill + Partners, L.P.