The law firm of Berman DeValerio filed a securities fraud lawsuit today against BP, plc (NYSE: BP) (“BP” or the “Company”), expanding the complaint to cover certain investors who acquired BP stock as early as mid-2005.

The complaint, filed on behalf of the Oklahoma Police Pension & Retirement System, includes investors who purchased or otherwise acquired American Depository Shares (“ADS”) of BP between June 30, 2005 and June 1, 2010, inclusive (the “Class Period”) and all U.S. investors who purchased or otherwise acquired ordinary shares of BP during the Class Period. In previous complaints, the Class Period for ordinary shares had extended back to 2008, at the earliest.

Berman DeValerio ( filed the complaint July 19, 2010 in the United States District Court for the Eastern District of Louisiana. The complaint was filed as The Oklahoma Police Pension & Retirement System v. BP et al., 2:10-cv-02013.

The action seeks to recover losses under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 (the “Exchange Act”) and Rule 10b-5 promulgated thereunder by the United States Securities and Exchange Commission (the “SEC”), as well as state law claims. Pursuant to the Private Securities Litigation Reform Act of 1995, investors wishing to serve as the Lead Plaintiff are required to file a motion for appointment as Lead Plaintiff by no later than July 20, 2010.

The complaint claims that BP failed to disclose that the Company’s operations were being conducted in a highly reckless manner, as it lacked any legitimate plan to respond to an oil spill from its drilling activities in the Gulf of Mexico (the “Gulf”), which it had touted since at least June 2005 as a major growth area. Those concealed risks materialized with a fatal April 20, 2010 fire on the Deepwater Horizon oil rig that led to the worst oil spill in U.S. history, according to the complaint.

The resulting cost to investors will run into the billions of dollars, the complaint alleges. At the time of the rig explosion, BP shares traded for approximately $60 per ADS and approximately £655 per ordinary share. Since that time, however, the Company’s ADS and ordinary shares have fallen approximately 40%, eliminating billions of dollars of market capitalization.

“The loss in value is directly related to the materialization of the risks created by BP’s misleading statements and material omissions,” the complaint says. “As a result of defendants’ wrongful acts and omissions, and the precipitous decline in the market value of the Company’s securities, Plaintiff and other Class Members suffered damages.”

To receive a copy of the complaint, please call Berman DeValerio at (800) 516-9926 or click here.

If you are a member of the Class, you may, no later than July 20, 2010, request that the court appoint you as Lead Plaintiff for the class. You may contact the attorneys at Berman DeValerio to discuss your rights and interests in the case. Please note: you may also retain counsel of your choice and need not take any action at this time to be a class member.

Berman DeValerio is a national law firm representing plaintiffs in lawsuits against corporate wrongdoers, chiefly for violations of securities and antitrust laws. The firm has 39 lawyers in Boston, San Francisco and Palm Beach Gardens, Florida.

Copyright Business Wire 2010