Omnicom Group swung to a fourth-quarter net loss of $941.1 million in 2025, or $4.02 per diluted share, after posting net income of $448 million the year before. Revenue climbed to $5.53 billion from $4.32 billion. The shift stemmed from $1.1 billion in repositioning costs, $543.4 million in losses on planned dispositions, and $186.7 million in transaction expenses tied to the November 26 acquisition of The Interpublic Group of Companies.

John Wren, Omnicom’s chairman and chief executive officer, highlighted post-acquisition moves. “We made key leadership and brand announcements, refreshed our enterprise growth strategy, and launched the next generation of our Omni data and technology platform,” Wren said. He pointed to three priorities: simplifying the business portfolio for connected capabilities, doubling cost synergies to $1.5 billion with $900 million targeted for 2026, and a fresh $5 billion board-authorized share buyback program that includes a $2.5 billion accelerated repurchase.

Operating expenses ballooned to $6.5 billion from $3.6 billion. Salary and service costs rose 28.6% to $4 billion, driven by one month of IPG operations and constant currency revenue gains. Salary and related costs increased 25.2% to $2.4 billion but dipped as a percentage of revenue. Third-party service costs jumped 36.8% to $1.4 billion, fueled by media, advertising, and experiential work. Occupancy and other costs grew 25.9% to $403.5 million. SG&A expenses more than doubled to $293.9 million, largely from acquisition fees.

Revenue broke down by discipline with media and advertising at 60.1%, precision marketing 10.3%, public relations 9.1%, healthcare 7.3%, experiential 6.5%, execution and support 3.7%, and branding and retail commerce 3%. By region, the United States led at 51.9%, followed by Euro Markets and Other Europe at 17.6%, United Kingdom 9.6%, Asia Pacific 10.7%, Latin America 3.7%, Middle East and Africa 3.7%, and Other North America 2.8%.

For the full year 2025, Omnicom recorded revenue of $17.3 billion and a slim net loss of $54.5 million, or 27 cents per diluted share. Adjusted net income reached $1.8 billion, or $8.65 per share. Operating income stood at $444.7 million, while adjusted EBITA hit $2.7 billion with a 15.6% margin.

Interest expense, net, rose to $53.2 million in the fourth quarter from $38.1 million, reflecting IPG-related debt exchanges. The effective tax rate on the operating loss dropped to 12.7% from 26.4%, due to limited deductibility of certain charges in some jurisdictions.

Adjusted EBITA climbed 28.6% to $928.9 million with a 16.8% margin, up slightly from 16.7%. Weighted-average diluted shares outstanding swelled 17.8% to 233.8 million, thanks to shares issued for the IPG deal, partly offset by repurchases.

Omnicom, traded as OMC on the New York Stock Exchange, expects the synergies and buybacks to boost performance in 2026 and beyond. The company released the results on February 18, 2026.