MDC Communications of Toronto has expanded its communications and marketing services division in the u.s. with the purchase of a majority stake in Source Marketing, a promotions company based in Westport, Conn.

Source Marketing, which reported revenue of about us$7 million last year, was founded in 1989. Its client roster boasts Fortune 500 corporations such as hbo, Reckitt and Colman, Campbell Soup, Kodak, Ked’s Corporation, and Tetley USA.

MDC has recently acquired three u.s. firms for its communications division, starting with agency Margeotes/Fertitta + Partners in August and 75% of Internet marketing services company CyberSight last month.

In Canada, its holdings include sales promotion company Accumark Promotions Group and Toronto agency Ambrose Carr Linton Carroll.