OMC

• Core Operations revenue was $6.0 billion, with 6.1% organic growth.
• Reported operating income was $922.5 million; Non-GAAP Adjusted EBITA was $1.1 billion with a 17.2% margin.
• Diluted EPS was $2.08; Non-GAAP Adjusted diluted EPS was $2.65, up 29.3% year-over-year.
• The company did not provide forward-looking guidance in this filing.

2.02 Results of Operations and Financial Condition · 7.01 Regulation FD Disclosure · 9.01 Financial Statements and Exhibits

• Omnicom Group Inc. held its annual meeting of shareholders on May 5, 2026.
• An advisory resolution approving executive compensation passed with 136,696,153 votes for and 104,956,047 against.
• The appointment of KPMG LLP as independent auditor for fiscal year ending December 31, 2026 was ratified with 250,249,015 votes for.
• The results were reported under Item 5.07 as required for matters submitted to a vote of security holders.

5.07 Submission of Matters to a Vote of Security Holders

• Revenue for Q1 2026 was $6.2 billion, up from $3.7 billion in Q1 2025, primarily due to the IPG acquisition.
• Non-GAAP adjusted diluted EPS was $1.90, up 11.8% from $1.70.
• Core operations revenue (net of dispositions and held for sale) was $5.6 billion, with 3.9% organic growth.
• Non-GAAP adjusted EBITA was $861.4 million, with a margin of 13.8%.

2.02 Results of Operations and Financial Condition · 7.01 Regulation FD Disclosure · 9.01 Financial Statements and Exhibits

• Executives including Chairman and CEO John Wren and CFO Phil Angelastro participated in the event.
• The company expects 2026 revenue to grow approximately 4% on a constant currency basis compared to the combined $23.1 billion revenue base of Omnicom and Interpublic for the last twelve months ended September 30, 2025, net of planned dispositions.
• Cost reduction synergies of $1.5 billion are expected over 30 months, with 75%-80% of the $900 million in 2026 cost savings contributing to EBITA growth and margin improvement.
• The company recently completed a $2.4 billion Senior Notes issuance at an average coupon of 4.6%, partly to fund the $1.4 billion repayment of its 3.6% Senior Notes due April 2026, and expects to repurchase $3.0-$3.5 billion of common stock in 2026 under a $5 billion repurchase program.
• The information was furnished under Item 7.01 Regulation FD Disclosure and is not deemed filed for SEC purposes.

7.01 Regulation FD Disclosure

• Omnicom Finance Holdings plc, a wholly owned indirect subsidiary, closed a €600M offering of 3.850% Senior Notes due 2034, fully guaranteed by Omnicom, with net proceeds of approximately €594.5 million.
• The U.S. Notes proceeds will fund repayment of Omnicom's 3.600% Senior Notes due 2026 ($1.4B outstanding as of Dec 31, 2025) and general corporate purposes.
• The Euro Notes proceeds are intended for general corporate purposes, including working capital, acquisitions, debt repayment, and share repurchases.
• The Euro Notes are listed on the New York Stock Exchange, and the offerings closed on March 2, 2026.

1.01 Entry into a Material Definitive Agreement · 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement · 9.01 Financial Statements and Exhibits

• Fourth quarter net loss was $0.9 billion, with diluted loss per share of $4.02; non-GAAP adjusted net income per share was $2.59.
• Full year 2025 revenue was $17.3 billion, up 10.1% from 2024.
• Full year net loss was $54.5 million, with diluted loss per share of $0.27; non-GAAP adjusted net income per share was $8.65.
• Board approved a $5.0 billion share repurchase program, including $2.5 billion of accelerated share repurchase arrangements.

2.02 Results of Operations and Financial Condition · 7.01 Regulation FD Disclosure · 9.01 Financial Statements and Exhibits

• On January 28, 2026, Omnicom Group Inc. shareholders approved the Omnicom 2026 Incentive Award Plan at a special meeting.
• The Plan is described in the definitive proxy statement filed on December 22, 2025, and the full text is included as Exhibit 10.1.
• The approval was reported under Item 5.02 (compensatory arrangements) and Item 5.07 (shareholder vote).

5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements · 5.07 Submission of Matters to a Vote of Security Holders · 9.01 Financial Statements and Exhibits

• Omnicom issued approximately $2.76 billion in aggregate principal amount of new senior notes across six series due 2028 through 2048.
• The new notes were issued under the Omnicom Base Indenture, as amended by the Fifth Supplemental Indenture dated December 2, 2025.
• Approximately $184.8 million of existing IPG notes were not exchanged and remain obligations of IPG, subject to amended terms.
• Omnicom entered into a registration rights agreement with dealer managers to file an exchange offer registration statement within 180 days.

1.01 Entry into a Material Definitive Agreement · 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement · 9.01 Financial Statements and Exhibits