January 7, 2020 - The Court of Appeals affirmed the court's judgment. The case was dismissed.

April 10, 2019 - A notice appealing the court's dismissal was filed.

March 13, 2019 - The court granted the defendants' motion to dismiss.

October 12, 2018 - A motion to dismiss the second amended complaint was filed.

August 3, 2018 - A second amended complaint was filed.

June 19, 2018 - The court granted the defendants' motion to dismiss. The plaintiffs were given leave to amend the complaint.

December 8, 2017 - A motion to dismiss the corrected amended complaint was filed.

November 2, 2017 - A corrected amended complaint was filed.

October 13, 2017 - An amended complaint was filed.

May 3, 2017 - An investor in shares of Anadarko Petroleum Corporation (NYSE: APC) filed a lawsuit in the U.S. District Court for the Southern District of Texas over alleged violations of Federal Securities Laws by Anadarko Petroleum Corporation in connection with certain allegedly false and misleading statements made between February 17, 2016 and May 2, 2017.

According to the complaint the plaintiff alleges on behalf of purchasers of Anadarko Petroleum Corporation (NYSE: APC) common shares between February 17, 2016 and May 2, 2017, that the defendants violated Federal Securities Laws. More specifically, the plaintiff claims that between February 17, 2016 and May 2, 2017 the defendants made false and/or misleading statements and/or failed to disclose that Anadarko Petroleum Corporation’s maintenance and safety protocols in respect to certain of its vertical wells were inadequate, that due to the foregoing shortcomings, these wells were at an increased risk of explosion, and that as a result of the foregoing, Anadarko Petroleum Corporation’s public statements were materially false and misleading at all relevant times.

Anadarko Petroleum Corporation reported that its annual Total Revenue declined from over $8.69 billion in 2015 to over $7.86 billion in 2016 and that its Net Loss declined from over $6.69 billion in 2015 to over $3.07 billion in 2016.

Shares of Anadarko Petroleum Corporation (NYSE: APC) grew from $32.02 per share in early 2016 to as high as $72.69 per share in late 2016.

On April 26, 2017,an article was published stating that Anadarko Petroleum Corporation “plans to shut down 3,000 vertical wells in northeastern Colorado after a fatal home explosion in Firestone near one of its wells.” The article stated that the April 17 explosion killed two men in a recently built home located within 170 feet of an Anadarko Petroleum Corporation well.

Shares of Anadarko Petroleum Corporation (NYSE: APC) declined on April 27, 2017 to $55.57 per share.

On May 2, 2017, the Frederick-Firestone Fire Protection District, through a joint effort with the Firestone Police Department and with the assistance of the Colorado Bureau of Investigation, concluded that the fatal home explosion on April 17 was linked to a faulty gas line connected to an old well owned by Anadarko Petroleum Corporation. Officials stated that the gas line had been abandoned, but not disconnected from the wellhead and sealed at both ends. Consequently, the line only stopped leaking gas after Anadarko Petroleum Corporation shut down 3,000 wells in the region following the explosion.

Shares of Anadarko Petroleum Corporation (NYSE: APC) declined on May 3, 2017 to $50.99 per share.