NEW YORK: Omnicom Group's PR revenue grew 0.9% organically in the second quarter of 2012 to $322.2 million, compared with the previous year. 

The holding company owns and operates Fleishman-Hillard, Ketchum, Porter Novelli, Cone, Marina Maher Communications, and Mercury Public Affairs under its Diversified Agency Services unit. It acquired London-based communications agency Portland in April. 

In Q2, PR growth was outpaced by Omnicom's advertising and CRM agencies, which reported 7.1% and 5.8% organic growth respectively. PR made up 9% of ...