{"schema_version":"secwatch.filing_event.v1","accession":"0001213900-26-107282","form_type":"8-K","ticker":"OMC","cik":"0000029989","company_name":"OMNICOM GROUP INC.","filed_at":"2026-10-06T21:01:28+00:00","discovered_at":"2026-10-06T21:02:00.237574+00:00","generated_at":"2026-10-12T16:09:53.555736+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Omnicom CAO Andrew Castellaneta retires after 25 years; Jordan Farnam named Chief Accounting Officer","bullets":["Andrew Castellaneta retired as Senior Vice President and Chief Accounting Officer effective October 1, 2026, after more than 25 years at Omnicom; he will remain an employee for a transition period.","Omnicom's board appointed Jordan Farnam, 44, as Vice President, Global Financial Reporting and Chief Accounting Officer, effective October 1, 2026.","Farnam joined Omnicom in January 2024 as VP, Global Financial Reporting; previously Corporate Controller at Consumer Edge LLC (2022-2024) and Director, Technical Accounting at Spotify USA (2020-2022).","Farnam also spent time at PricewaterhouseCoopers LLP, including as Assurance Director serving technology and media multinational clients in the U.S. and Finland.","Omnicom stated Castellaneta's retirement is not the result of any disagreement with the Company on operations, policies or practices."],"urls":{"canonical":"https://secwatch.observer/filing/0001213900-26-107282","json":"https://secwatch.observer/filing/0001213900-26-107282.json","markdown":"https://secwatch.observer/filing/0001213900-26-107282.md","text":"https://secwatch.observer/filing/0001213900-26-107282.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/29989/000121390026107282/0001213900-26-107282-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/29989/000121390026107282/ea0307855-8k_omnicom.htm"},"model":{"generated_by":"deepseek-v4.1-flash:cloud@v2","generated_at":"2026-10-12T16:09:53.555736+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"21d470e86a","claim":"Jordan Farnam was appointed as Vice President, Global Financial Reporting and Chief Accounting Officer at OMNICOM GROUP INC..","evidence_excerpt":"On October 1, 2026, the Company’s Board of Directors appointed Jordan Farnam as Vice President, Global Financial Reporting and Chief Accounting Officer, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/29989/000121390026107282/0001213900-26-107282-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Vice President, Global Financial Reporting and Chief Accounting Officer"}],"fact_type":"executive_change"},{"claim_id":"444d23579e","claim":"Andrew Castellaneta retired as Senior Vice President and Chief Accounting Officer at OMNICOM GROUP INC..","evidence_excerpt":"On October 1, 2026, after a distinguished career including more than 25 years at Omnicom Group Inc. (the “Company”), Andrew Castellaneta retired from his role as the Company’s Senior Vice President and Chief Accounting Officer, effective immediately. Mr. Castellaneta will remain an employee of the Company for a period of time to facilitate a smooth transition.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/29989/000121390026107282/0001213900-26-107282-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"label":"Role","value":"Senior Vice President and Chief Accounting Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}