Omnicom Group Inc.

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

The foregoing summary and the description incorporated by reference from the Proxy Statement do not purport to be complete and are qualified in their entirety by reference to the full text of the Plan, a copy of which is included as Exhibit 10.1 hereto and incorporated herein by reference.

Item 5.07. Submission of Matters to a Vote of Security Holders.

(a) The Company held a special meeting of shareholders (the "Special Meeting") on January 28, 2026. At the Special Meeting, the Company's shareholders approved the Plan, which is described in more detail in the Proxy Statement.

The Company's shareholders approved the Plan as described in the Proxy Statement.

Votes For Votes Against Abstentions Broker Non-Votes

Item 9.01. Financial Statements and Exhibits.

10.1 Omnicom 2026 Incentive Award Plan (incorporated by reference to Annex A of the Company's Definitive Proxy Statement on Schedule 14A, filed on December 22, 2025).

104 The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.