Omnicom Group Inc.

OMC·NYSE·$74.41Share Price as of 11/2·$21BMarket Cap as of 11/2

Financials

10-QQ3 ended 09/30/2610/23/26 10-QQ2 ended 06/30/2607/29/26 10-QQ1 ended 03/31/2604/29/26 10-KFY 202502/20/26 10-QQ3 ended 09/30/2510/22/25

Disclosures

8-KCurrent report10/22/26 8-KCurrent report10/06/26 8-KCurrent report07/28/26 8-KCurrent report05/08/26 8-KCurrent report04/28/26

Prospectuses and Registrations

424B2Prospectus for primary offering02/27/26 424B2Prospectus for primary offering02/27/26 424B2Prospectus for primary offering02/25/26 424B2Prospectus for primary offering02/25/26 FWPFree writing prospectus02/25/26

Proxies

DEF 14ADefinitive proxy03/26/26 DEFA14AAdditional proxy materials03/26/26 DEF 14ADefinitive proxy12/22/25 PRE 14APreliminary proxy12/10/25 DEF 14ADefinitive proxy03/27/25

Ownership

Form 3Initial insider ownership10/09/26 Form 4Insider transaction10/05/26 Form 4Insider transaction10/05/26 Form 4Insider transaction10/05/26 Form 4Insider transaction10/05/26

Other

11-KEmployee stock purchase plan report06/29/26 ARSAnnual report to shareholders03/26/26 CERTCEO/CFO certification03/03/26 8-A12B8-A12B03/02/26 EFFECTRequest for effectiveness12/12/25