SAN DIEGO–Johnson Bottini, LLP today announced that it has filed a class action lawsuit in United States District Court for the Southern District of California on behalf of all persons who purchased or otherwise acquired securities of Sequenom, Inc. (NASDAQ:SQNM – News) between June 4, 2008 and April 29, 2009. If you are a member of the class, you may move the Court, no later than 60 days from today to serve as lead plaintiff. If you wish to discuss this action or have any questions concerning this notice or your rights, please contact plaintiff’s counsel, Frank Bottini or Whittney Beard of Johnson Bottini at toll free 888/568-8456 or 619/230-0063, or via e-mail at whittneyb@johnsonbottini.com.

The Complaint alleges that on April 29, 2009, after the market closed, Sequenom announced that the expected launch of its SEQureDxTM Down syndrome test will be delayed because of employee mishandling of data and results. As a result, in after-market trading, Sequenom stock lost more than two-thirds of its trading value, falling from $14.91 to $4.69.

A further investigation will now be conducted on the test results and data for all products, not just SEQureDxTM. The Company admitted that multiple prior press releases and public statements concerning SEQureDxTM can no longer be relied upon, including press releases the Company issued on June 4, 2008, September 23, 2008, December 1, 2008, January 28, 2009, and February 3, 2009.

The Complaint alleges that Sequenom and certain of its executive officers violated Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 by issuing false and misleading statements. Plaintiff seeks to recover damages on behalf of the class members and has retained Johnson Bottini, a law firm with significant experience in prosecuting class actions and substantial expertise in actions involving corporate fraud. You can view a copy of the complaint at www.johnsonbottini.com.

Johnson Bottini is headquartered in San Diego and is dedicated to providing its clients with personalized service. The firm specializes in securities class action litigation and has taken a leading role in many important actions on behalf of defrauded investors, consumers, and companies. The Johnson Bottini website has more information about the firm.