The media services giant, owner of advertising agencies BBDO Worldwide and TBWA\ and the Porter Novelli PR brand, recorded an increase in worldwide revenue of 8%. It grew from $1.5bn (£1.06bn) for the quarter ending September 30 last year to $1.6bn (£1.13bn) for the same period this year.
In the US, revenue increased by more than that -- it was up 16% to $339m (£239m).
Omnicom, headed by president and CEO John Wren, benefited from the timely sale of its stake in new-media consultancy Razorfish. It sold the company and made an after-tax gain of $63.8m (£44.9m). Razorfish has since closed offices in Europe and is struggling with losses.
The group said earnings per share increased by 4% to $0.50 (35p), up from $0.48 (34p) last year.