A vice president for the global securities firm Nomura was accused Monday of insider trading for allegedly netting himself $48,000 in profits by trading on securities for a Virginia-based technology company ahead of its acquisition.

According to federal prosecutors, Avaneesh Krishnamoorthy learned through the course of his work that the private equity firm Golden Gate Capital intended to acquire the online analytics and marketing firm Neustar. Between the end of November and early December, federal prosecutors say Krishnamoorthy placed trades through two brokerage accounts he kept hidden from his employer.