The Nasdaq Stock Market, Inc. has announced that it has entered into a definitive agreement to acquire Shareholder.com, a privately held firm specializing in shareholder communications and investor relations intelligence services. Shareholder.com will operate as a wholly owned subsidiary of NASDAQ. Shareholder.com currently serves over 1,000 clients, including 396 companies currently listed on NASDAQ. Terms of the transaction were not disclosed. This transaction will enable NASDAQ to offer Shareholder.com's suite of investor relations and intelligence services to its 3,200 listed companies and other publicly held companies. The transaction is expected to close in the first quarter of 2006.