Overview
Omnicom reported revenue of US$17.27bn for 2025, up 10.1% from US$15.69bn, according to its annual report on Form 10-K[2]. The increase was driven largely by the acquisition of the Interpublic Group, which closed on 26 November 2025, so the 2025 figure includes only about one month of Interpublic’s revenue[2]. Fourth-quarter revenue alone was US$5.5bn, up 27.9%[14]. Omnicom had about 120,000 employees at the end of 2025 and has identified businesses for disposal that generated about US$3.2bn of revenue in the prior year[2]. A full year of Interpublic in 2026 is likely to change its position in this ranking.
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