NEW YORK, July 13, 2018 (GLOBE NEWSWIRE) -- Levi & Korsinsky, LLP announces that class action lawsuits have commenced on behalf of shareholders of the following publicly-traded companies. Shareholders interested in serving as lead plaintiff have until the deadlines listed to petition the court; further details about the cases can be found at the links provided.

Prothena Corporation (NASDAQ: PRTA ) Class Period: October 15, 2015 – April 20, 2018 Lead Plaintiff Deadline: July 16, 2018

According to the complaint, Prothena allegedly made materially false and/or misleading statements and/or failed to disclose that: relevant trial data showed that Prothena’s antibody NEOD001, designed to treat amyloid light chain amyloidosis (“AL amyloidosis”), was not an effective treatment; the Company made misleading comparisons of NEOD001’s “best response” rates against certain prior studies; and the Company touted Prothena’s ongoing Phase 1/2 study of NEOD001 as providing a strong basis for late-stage Phase 2b and Phase 3 studies of NEOD001, even though the full Phase 1/2 study data demonstrated that NEOD001 was not an effective treatment.

To learn more about the Prothena class action go to:   http://www.zlk.com/pslra-d/prothena-corporation?wire=3 .

Symantec Corp. (NASDAQ: SYMC ) Class Period: May 20, 2017 - May 10, 2018 Lead Plaintiff Deadline: July 16, 2018

The complaint alleges that Symantec's internal controls over financial reporting were materially weak and deficient; Symantec later disclosed "reporting of certain Non-GAAP measures including those that could impact executive compensation programs" would lead to heightened regulatory scrutiny by the SEC; and as a result, Symantec's public statements were materially false and misleading at all relevant times. On May 10, 2018, Symantec announced the commencement of an internal investigation “in connection with concerns raised by a former employee.”

To learn more about the Symantec action go to: http://www.zlk.com/pslra-d/symantec-corp?wire=3 .

You have until the lead plaintiff deadlines to request the court appoint you as lead plaintiff. Your ability to share in any recovery doesn’t require that you serve as a lead plaintiff.

Levi & Korsinsky is a national firm with offices in New York, California, Connecticut, and Washington D.C. The firm’s attorneys have extensive expertise and experience representing investors in securities litigation, and have recovered hundreds of millions of dollars for aggrieved shareholders. Attorney advertising. Prior results do not guarantee similar outcomes.

CONTACT: Levi & Korsinsky, LLP Joseph E. Levi, Esq. 30 Broad Street - 24th Floor New York, NY 10004 Tel: (212) 363-7500 Toll Free: (877) 363-5972 Fax: (212) 363-7171 www.zlk.com