"Meijer Inc filed a purported class action complaint on May 12, 2015 against the company and its certain subsidiaries, alleging antitrust and RICO Act violations in connection with Ranbaxy securing market exclusivity as part of the FDA's approval for certain products," Sun Pharmaceutical Industries said in a filing to BSE.
The company is reviewing the complaint and has "no comments at this time," it added.
Passed in 1970, the Racketeer Influenced and Corrupt Organisations Act (RICO) Act is a federal law designed to combat organised crime in the United States. It allows prosecution and civil penalties for racketeering activity performed as part of an ongoing criminal enterprise.
Michigan retailer Meijer Inc and its distribution arm are seeking to represent buyers of Roche Holding AG's Valcyte, which treats a virus afflicting transplant patients and people with AIDS, and Novartis AG's blood-pressure drug Diovan, as per the reports.
Ranbaxy also declined to offer any comment on the issue.
Shares of Sun Pahrmaceutical Industries today closed at Rs 946.45 per scrip on BSE, up 0.19 per cent from previous close.