In a followup research note, Pivotal Research analyst Brian Wieser suggested supply-side considerations could Omnicom's continued fortunes in the media-buying arena.
"A wild card for Omnicom is how much incremental revenue will be generated via media trading revenues associated with principal positions it takes. If growth from this activity moderates, then the impact should be limited," he said.
Wren also emphasized Omnicom's partnerships with technology companies such as Saesforce.com and Facebook, with whom it signed a deal last year to leverage the company's rebuilt Atlas ad management platform.
"We are building digital, data and analytical capabilities by investing in our agencies and partnering with innovative tech companies," he said. "Our creative talent is working side by side with engineers from Facebook, Google, Instagram, Twitter and others."
Wren cited Omnicom's cross-disciplinary work for clients like Lowe's using new platforms like Tap Thru and HyperMade. "Together, our agencies and tech partners did everything from creative and targeting to media placement and analytics," he said.