According to the law firm press release, Achillion Pharmaceuticals, Inc. ("Achillion" or the Company) is a biopharmaceutical company that discovers and develops solutions for infectious diseases such as HIV, hepatitis, and resistant bacterial infections. The Company focuses its research and development on products for the antiviral and antibacterial markets.

The Complaint alleges that throughout the Class Period, Defendants made false and/or misleading statements, as well as failed to disclose material adverse facts about the Company's business, operations, and prospects, including the safety and suitability of its premier investigative drug for the treatment of hepatitis, sovaprevir. Defendants failed to inform investors that sovaprevir in fact did not interact well with other drugs commonly administered to treat hepatitis and/or HIV. Specifically, the Company misled investors to believe that even though patients in the Company's clinical trials for sovaprevir had elevations in liver enzymes, that these liver enzymes elevations were transient and returned to baseline values and were attributable to non-drug-related factors. As a result of the foregoing, the Company's statements were materially false and misleading at all relevant times.

On July 1, 2013, the Company disclosed that the FDA instituted a clinical hold on "sovaprevir after elevations in liver enzymes associated with significantly higher than anticipated exposures to atazanavir and sovaprevir were noted in a Phase I healthy subject drug-drug interaction study evaluating the effects of concomitant administration of sovaprevir with ritonavir-boosted atazanavir." As a result of this disclosure, Achillion shares declined $2.10 per share or over 25%, to close at $6.26 per share on July 2, 2013.

Then, on September 27, 2013, after the market closed, the Company disclosed that the FDA had continued its clinical hold on sovaprevir, after, "the FDA concluded that the removal of the clinical hold is not warranted." As a result of this disclosure, Achillion shares declined $4.22 per share or over 58%, to close at $3.02 per share on September 30, 2013.

On May 6, 2014, the Plaintiffs filed a Notice of Voluntary Dismissal, dismissing this case without prejudice.