The US Securities and Exchange Commission (SEC) has approved the proposed merger of NYSE Euronext and Deutsche Borse.
The approval would permit NYSE Euronext to become a wholly owned subsidiary of Holdco.
In December 2011, the Antitrust Division of the United States Department of Justice cleared the proposed combination between NYSE Euronext and Deutsche Borse.
The approvals are contingent upon the planned $17bn combination closing.
The transaction is still subject to further closing conditions, including approvals by the European Commission and other relevant national stock exchange supervisory authorities.
NYSE Euronext owns 100% of the equity interest of NYSE Group.
Deutsche Borse indirectly owns 50% of the equity interest of International Securities Exchange Holdings, which in turn holds 100% of the equity interest of ISE.