A Mergers and Acquisitions Advisory Service Company Trinity M&A Group LLC Trinity M&A Group LLC (TMAG) provides advisory services to privately-held companies with annual revenues under $25 million and divisions of larger companies, in the same revenue range, in mergers, acquisitions and corporate development. We assist our Clients in developing strategies to ensure effective transactions, whether the Client is buying another company in its industry, selling itself or entering into new strategic markets or geographies.