NEW YORK, Dec. 19, 2012 /PRNewswire/ —

Arbitron Inc.
Levi & Korsinsky is investigating the Board of Directors of Arbitron Inc. (NYSE: ARB) for possible breaches of fiduciary duty and other violations of state law in connection with the sale of the Company to Nielsen Holdings N.V. (NYSE: NLSN) for $48 per share.

Click here to learn more about the investigation http://zlk.9nl.com/arbitron-arb/, or call: 877-363-5972.

Hi-Crush Partners LP
Levi & Korsinsky announces that a class action lawsuit has been commenced in the United States District Court for the Southern District of New York on behalf of investors who acquired Hi-Crush Partners LP (NYSE: HCLP) securities pursuant to the Company’s August 16, 2012 Initial Public Offering.

For more information, click here: http://zlk.9nl.com/hi-crush-partners-hclp. You have until January 21, 2013 to request that the Court appoint you as lead plaintiff.

Align Technology, Inc.
Levi & Korsinsky announces that a class action lawsuit has been commenced in the United States District Court for the Northern District of California on behalf of investors who acquired Align Technology, Inc. (NasdaqGS: ALGN) securities between April 23, 2012 and October 17, 2012.

For more information, click here: http://zlk.9nl.com/align-technology-algn/. You have until January 28, 2013 to request that the Court appoint you as lead plaintiff.

Abiomed, Inc.
Levi & Korsinsky announces that a class action lawsuit has been commenced in the United States District Court for the District of Massachusetts on behalf of investors who purchased Abiomed, Inc. (NasdaqGS: ABMD) stock between August 5, 2011 and October 31, 2012.

For more information, click here: http://zlk.9nl.com/abiomed-abmd.

Levi & Korsinsky is a national firm with offices in New York and Washington D.C. The firm has extensive expertise in prosecuting securities litigation involving financial fraud, representing investors throughout the nation in securities and shareholder lawsuits. Attorney advertising. Prior results do not guarantee similar outcomes.

CONTACT:
Levi & Korsinsky, LLP
Joseph Levi, Esq.
30 Broad Street – 24th Floor
New York, NY 10004
Tel: (212) 363-7500
Toll Free: (877) 363-5972
Fax: (866) 367-6510
www.zlk.com

SOURCE Levi & Korsinsky, LLP