Omnicom Group Appoints Jordan Farnam as Chief Accounting Officer Following Retirement of Andrew Castellaneta

Executive Transition Overview

On October 6, 2026, Omnicom Group Inc. filed a Form 8-K under Item 5.02 reporting leadership changes within its principal accounting management effective October 1, 2026.

Retirement of Chief Accounting Officer

• Executive: Andrew Castellaneta
• Role: Senior Vice President and Chief Accounting Officer
• Details: Mr. Castellaneta retired after more than 25 years of service at Omnicom Group Inc. He will continue as an employee for a transition period to ensure operational continuity.
• Disagreements: The filing confirms that his retirement is not the result of any disagreement with the Company regarding operations, policies, or practices.

Appointment of Successor

• Executive: Jordan Farnam (Age 44)
• New Title: Vice President, Global Financial Reporting and Chief Accounting Officer
• Background:
  • Joined Omnicom in January 2024 as Vice President, Global Financial Reporting.
  • Previously Corporate Controller for Consumer Edge LLC (2022–2024).
  • Director, Technical Accounting for Spotify USA Inc. (2020–2022).
  • Held several assurance and leadership roles at PricewaterhouseCoopers LLP, including Assurance Director serving multinational technology and media clients in the U.S. and Finland.

Market and Trading Assessment

• Significance Level: Low
• Rationale: This is an orderly, planned internal promotion to fill the Chief Accounting Officer post following a long-tenured executive's retirement, with no operational or accounting disputes indicated.