Omnicom Group Inc. (OMC) — Form 8-K: Current report

Omnicom Group Inc. reported the retirement of Andrew Castellaneta as Senior Vice President and Chief Accounting Officer, effective October 1, 2026. Mr. Castellaneta will remain an employee temporarily to ensure a smooth transition. The company appointed Jordan Farnam as Vice President, Global Financial Reporting and Chief Accounting Officer on the same date.