Other Information
−Removed: During the quarter ended June 30, 2026, none of our directors or officers adopted, modified, or terminated a Rule 10b5-1 trading arrangement, or a non-Rule 10b5-1 trading arrangement, in each case as defined in Item 408 of Regulation S-K.
−Removed: 10.1 Omnicom Second Amended and Restated Employee Stock Purchase Plan.
+Added: During the quarter ended September 30, 2026, none of our directors or officers adopted, modified, or terminated a Rule 10b5-1 trading arrangement, or a non-Rule 10b5-1 trading arrangement, in each case as defined in Item 408 of Regulation S-K.
31.1 Certification of the Chairman and Chief Executive Officer required by Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended.
11 unchanged sentences
OMNICOM GROUP INC.
−Removed: July 29, 2026 /s/ P HILIP J.
+Added: October 23, 2026 /s/ P HILIP J.
Executive Vice President and Chief Financial Officer (Principal Financial Officer and Authorized Signatory)
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.