ARBX Arbinet Corp. (MM)

Notice is hereby given that a class action lawsuit was filed in the United States District Court for the District of New Jersey, on behalf of all securities purchasers of Arbinet-thexchange, Inc. ("Arbinet " or the "Company") (Nasdaq:ARBX) who bought pursuant and /or traceable to the Company's Initial Public Offering ("IPO") on or about December 16, 2004 and between December 16, 2004 and June 21, 2005 inclusive (the "Class Period"). Stull, Stull & Brody has substantial experience representing employees who suffered losses from purchases of their employer's stock in their 401(k) plans. If you bought Arbinet stock through your Arbinet retirement account and have information or would like to learn more about these claims, please contact us. The complaint charges Arbinet-thexchange, Inc., J. Curt Hockemeier and John J. Roberts with violations of the Securities Exchange Act of 1934. More specifically, the Complaint alleges that the Company failed to disclose and misrepresented the following material adverse facts which were known to defendants or recklessly disregarded by them: (1) that Arbinet was experiencing a shorter than average call duration and a mix shift to wireless calls from wired calls, which led to a decrease in the average number of minutes the Company transacted on the exchange; (2) that the Company, due to credit problems, was forced to suspend trading for two of its largest customers; (3) that the Company's international offerings were not adequately differentiated from its competitors, thereby jeopardizing Arbinet's ability to grow abroad; and (4) that as a result of the foregoing, the defendant's positive statements about the Company's condition and progress lacked in all reasonable basis. On June 21, 2005, Arbinet lowered its guidance for both the second quarter and all of 2005. On this news, shares of Arbinet fell $4.00 per share, or 34.78 percent, on June 22, 2005, to close at $7.50 per share. If you acquired Arbinet common stock pursuant or traceable to the Company's IPO on or about December 16, 2004 and June 21, 2005, you may, no later than October 31, 2005, request the Court appoint you as lead plaintiff. A lead plaintiff is a representative party that acts on behalf of other class members in directing the litigation. In order to be appointed lead plaintiff, the Court must determine that the class member's claim is typical of the claims of other class members, and that the class member will adequately represent the class. Under certain circumstances, one or more class members may together serve as "lead plaintiff." Your ability to share in any recovery is not, however, affected by the decision whether or not to serve as a lead plaintiff. You may retain Stull, Stull & Brody, or other counsel of your choice, to serve as your counsel in this action. Stull, Stull & Brody has not yet filed a complaint in this action. Stull, Stull & Brody has litigated many class actions for violations of securities laws in federal courts over the past 30 years and has obtained court approval of substantial settlements on numerous occasions. Stull, Stull & Brody maintains offices in both New York and Los Angeles. If you wish to discuss this action or have any questions concerning this notice or your rights or interests with respect to these matters, please contact Tzivia Brody, Esq. at Stull, Stull & Brody by e-mail at SSBNY@aol.com or by calling toll-free 1-800-337-4983, or by fax at 212/490-2022, or by writing to Stull, Stull & Brody, 6 East 45th Street, New York, NY 10017. You can also visit our website at www.ssbny.com.