[1] The agency provides creative, public relations, strategy, social, design, behavioral sciences, digital experience, and production services.

[4] Other early employees included then-Chief Operating Officer Joe Grimaldi, who would go on to become Chairman of MullenLowe U.S., and the agency's fourth partner and executive creative director Edward Boches.

[5][6] In April 1999, Mullen Advertising, by then the largest independent agency in New England, was acquired by Interpublic Group of Companies.

[8] In January 2001, Interpublic merged Mullen with another of its holdings, Winston-Salem, North Carolina–based agency Long Haymes Carr (LHC).

[2] MullenLowe U.S. is headquartered at 40 Broad Street in Boston, where it moved on June 1, 2009, following 22 years in a manor house in Wenham, Massachusetts.