NEW YORK — Interpublic PR firms Weber Shandwick and Golin reported "high single-digit" organic growth in 2015, helping the group's CMG unit grow 3.6% to $1.5 billion.

The two firms submitted "particularly strong performances", said Weber Shandwick CEO Andy Polansky, with his firm recording double-digit organic growth for the year. The CMG unit, which also includes other firms such as Jack Morton and Octagon, grew revenue by 6.5% on an organic basis in the Q4 of 2015.

During the earnings Q&A, Interpublic CEO Michael Roth said: "Weber Shandwick in particular was a leader in terms of looking at their portfolio and converting to the digital and social environment, and as a result we see them taking market share because of their content and new thinking in terms of PR."

Polansky added that 25 of the agency's offices recorded double-digit growth, pointing to especially strong performances in New York, Chicago, Boston, the West Coast, China, Brazil and Korea.

In addition, he noted that healthcare had delivered good returns, while digital accounted for 30% of the firm's growth. "We continue to see strength in the business, powered by our strength in digital and social," said Polansky. "We’re taking on more integrated assignments across paid, owned, earned and shared."

Polansky added that while potential "market volatility" is being monitored, so far he had not seen any signs of a downturn.