The Dean Foods/Golden Guernsey milk processing plant at Delafield Street and Northview Road was officially sold to a California-based investment firm on Monday, according to a news release from the OpenGate Capital, the firm that purchased the property.

OpenGate Capital aquired the Golden Guernsey brand. The plant will operate as Golden Guerney, LLC, according to the news release.

Dean Foods was ordered to sell the milk processing plant in March, which settled a federal antitrust lawsuit that fought the company’s 2009 purchase of the plant from Foremost Farms USA because it controlled nearly 60 percent of milk sales, according to a March news release from Attorney General J.B. Van Hollen.

The lawsuit challenging the purchase was based on antitrust laws that claimed the purchase prevented retailers and school districts from benefiting from competition between the two companies, according to the release.

The deal received regulatory approval, according to the OpenGate Capital news release.

“OpenGate has acquired a solid platform for growth with our new dairy processing plant and its associated brands,” Andrew Nikou, OpenGate Capital Founder and Managing Partner, said in the news release. “We look forward to working with Golden Guernsey plant management to accelerate its expansion opportunities and uphold its high standards for quality and excellence in milk products.”