Looney & Grossman was organized in August 1965 by four former assistant United States attorneys. William F. Looney. Jr., one of the four founding attorneys, is a role model for the firm's attorneys and a highly respected trial attorney within the legal community. Stewart Grossman joined the firm as an Associate in 1973 and has established himself as a highly regarded bankruptcy attorney.

In the first 20 years of its existence, Looney & Grossman was primarily engaged in litigation, both criminal and civil, in State courts in Massachusetts and in many Federal courts around the country. The firm became well known for its successes in areas including state and federal white collar criminal practice, bankruptcy litigation, corporate mergers and acquisitions, bankruptcy reorganizations and workouts of distressed businesses.

As the diversity of clients evolved over the years, Looney & Grossman has expanded its range of services to meet those needs. The firm has developed a substantial business practice including sophisticated business transactions, real estate matters, and estate planning and administration. In addition, the firm has added the specialized services of admiralty and transportation law, family law, and expertise in the restaurant and food industry.