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AI brief of an SEC Form 8-K · Omnicom (OMC)

Omnicom says Chief Accounting Officer Castellaneta retires; Farnam named successor

Neutral Impact 3 of 5 leadership Written later

Omnicom's longtime Chief Accounting Officer, Andrew Castellaneta, retired effective immediately on October 1, 2026, after more than 25 years with the company, and will stay on as an employee for a period to ease the transition. The board appointed Jordan Farnam, who has been with Omnicom since January 2024, as Vice President, Global Financial Reporting and Chief Accounting Officer, effective immediately. The filing says the retirement was not due to any disagreement with the company on operations, policies or practices.

Key points

  • Andrew Castellaneta retired as Senior Vice President and Chief Accounting Officer effective October 1, 2026
  • Jordan Farnam, age 44, appointed Vice President, Global Financial Reporting and Chief Accounting Officer effective October 1, 2026
  • Farnam joined Omnicom in January 2024 as Vice President, Global Financial Reporting; previously Corporate Controller at Consumer Edge LLC and at PricewaterhouseCoopers LLP
  • Castellaneta will remain an employee for a period of time to facilitate a smooth transition

The filing

CompanyOmnicom (OMC)
Form8-K, current report
Filed with the SECOct 6, 2026, 5:01 PM ET
Accession number0001213900-26-107282

Items reported: 5.02 Director / Officer Change

Read the filing on SEC.gov ↗

Written by AI on Nov 8, 2026, 12:42 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on October 06, 2026.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.