This excerpt taken from the NDAQ 8-K filed Jan 27, 2006.
Acquisition of Instinet Group Incorporated
On December 8, 2005, Nasdaq completed the acquisition of Instinet and the immediate sale of Instinets Institutional Brokerage division to an affiliate of SLP. As a result of these transactions Nasdaq owns Norway. Norway owns 100.0% of IHC, which owns 100.0% of the INET ECN. The aggregate purchase price for all outstanding shares of Instinet was approximately $1.878 billion in cash. Nasdaq paid total cash consideration of approximately $934.5 million, which is subject to certain post-closing adjustments, and Silver Lake Partners paid approximately $207.5 million of the purchase price pursuant to the sale of the Institutional Brokerage division. The balance of the $1.878 billion reflects, in part, Instinets available cash and, in part, a cash dividend of approximately $109.0 million, which Instinet previously paid to its stockholders from the net after-tax proceeds of the sale of Instinets Lynch, Jones & Ryan, Inc. brokerage subsidiary (LJR).