Omnicom adopts bylaw amendments updating shareholder proposal deadlines and proxy rules

OMNICOM GROUP INC.

Notice period for shareholder proposals: 90-120 days before annual meeting anniversary; similar for special meetings.
Amendments address universal proxy rules; require compliance with Rule 14a-19 for non-Board nominee solicitations.
Enhanced disclosure requirements for shareholder nominations and proposals, including background info on proposing shareholders.
Shareholder proxies must use a non-white proxy card; white reserved for Board use.
For 2025 annual meeting, shareholder proposals not in proxy materials must be received between Jan 7 and Feb 6, 2025.

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