Commerce Capital Group | 160 followers on LinkedIn. Commerce Capital Group ("CCG") is a private investment banking firm specializing in mergers and acquisitions ("M&A") advisory and capital raising services, primarily for small and middle-market companies with revenues between $25 million and $500 million, throughout the United States. Focused on the Infrastructure Services segment of the Engineering and Construction (“E&C”) industry, CCG leverages a combination of transaction experience, proprietary research, industry intelligence, and extensive network of financial and strategic contacts to provide value-added services to its clients.