September 16, 2015 - The lead plaintiff filed a notice of voluntary dismissal and the court granted the notice and dismissed the case without prejudice.
May 12, 2014 - Lead plaintiff motions were filed.

March 13, 2014 - An investor in shares of Hyperdynamics Corporation (NYSE: HDY) filed a lawsuit in the U.S. District Court for the Southern District of Texas against Hyperdynamics Corporation over alleged violations of Federal Securities Laws in connection with certain allegedly false and misleading statements made between November 8, 2012 and March 11, 2014.

According to the complaint the plaintiff alleges on behalf of all persons or entities who purchased or otherwise acquired securities of Hyperdynamics Corporation (NYSE: HDY) between November 8, 2012 and March 11, 2014, that Hyperdynamics Corporation and certain of its officers and directors violated Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder.

More specifically, the plaintiff claims that defendants made false and/or misleading statements and/or failed to disclose that Hyperdynamics Corporation obtained and retained oil and gas concession rights in violation of the U.S. Foreign Corrupt Practices Act and/or U.S. anti-money laundering statutes, that Hyperdynamics Corporation lacked adequate internal and financial controls, and that as a result of the foregoing, Hyperdynamics Corporation’s statements were materially false and misleading at all relevant times.

On December 31, 2012, Hyperdynamics Corporation announced that its wholly owned subsidiary, SCS Corporation Ltd, has completed the previously announced sale of a 40% gross interest in Hyperdynamics Corporation's oil and gas exploration concession offshore Guinea to Tullow Guinea Ltd, a subsidiary of UK based Tullow Oil Plc. Pursuant to the sale, among other things, Tullow Oil Plc paid $27 million to Hyperdynamics Corporation for reimbursement of past costs, and agreed to pay Hyperdynamics Corporation’s pro rata share of future drilling costs for an exploration and appraisal well up to $100 million.

On April 1, 2013, Tullow Oil Plc became the operator of the Concession.

On September 30, 2013 Hyperdynamics Corporation announced that in September 2013 it received a subpoena from the United States Department of Justice (DOJ) requesting that Hyperdynamics Corporation documents relating to its business in Guinea. The announcement stated that the DOJ is investigating whether Hyperdynamics Corporation’s activities in obtaining the Concession violated the U.S. Foreign Corrupt Practices Act or U.S. anti-money laundering statutes.

On October 1, 2013, Reuters quoted Hyperdynamics Corporation’s Chief Executive Officer, Ray Leonard, as stating that the DOJ probe likely won't affect Hyperdynamics Corporation’s ability to explore the Concession.

On February 7, 2014, Hyperdynamics Corporation announced that it has filed operational and financial results for the three- and six-month periods ended December 31, 2013 with the U.S. Securities and Exchange Commission. Hyperdynamics Corporation disclosed that, in January 2014, it received a subpoena from the Securities and Exchange Commission (SEC) relating to its acquisition of the Concession.

On March 12, 2014, Tullow Oil Plc announced that the DOJ and SEC investigations constituted a “force majeure” under its agreement with Hyperdynamics Corporation, thereby allowing Tullow Oil Plc to suspend plans to start drilling a deepwater well at the Concession on April 1, 2014. According to Tullow Oil Plc, it “cannot proceed with its activities on the [Concession] until these [regulatory] issues are resolved.”

Shares of Hyperdynamics Corporation (NYSE: HDY) declined to $1.24 per share on March 12, 2014.

Hyperdynamics Corporation reported that its Net Loss declined from $149.31 million for the 12 months period the ended on June 30, 2012 to $18.46 million for the 12 months period that ended on June 30, 2013.