This excerpt taken from the NDAQ 10-K filed Mar 15, 2006.
On February 6, 2006, Nasdaq completed the acquisition of Shareholder.com, a privately held, Massachusetts-based firm specializing in shareholder communications and investor relations intelligence services, for $40.0 million in cash, subject to post-closing adjustments. Shareholder.com will operate as a wholly-owned subsidiary of Nasdaq. Shareholder.com currently serves over 1,000 clients, including companies listed on both domestic and foreign exchanges. Shareholder.com will continue to offer its comprehensive suite of services to all publicly traded companies who wish to optimize investor relations capabilities.