# Omnicom Group Inc.
> Omnicom · OMC · New York, New York
- Profile type: Company
- Profile status: baseline
- Last updated: 2026-05-03T00:00:00.000Z
- Canonical URL: https://thestateofstreaming.com/companies/omnicom-group/
- Also known as: Omnicom Group, OMC, Omnicom Group Inc., Omnicom Media Group, OMG, NYSE:OMC
## Summary
Omnicom Group Inc. (NYSE: OMC) is the world's largest marketing-services holding company after closing its $13.25B all-stock acquisition of Interpublic Group on November 26, 2025. Led by Chairman/CEO John Wren since 1997, the combined entity operates BBDO, DDB, TBWA, McCann, OMD, PHD, plus Annalect; pro forma revenue exceeds $25B. The merger made Omnicom the No. 1 holdco ahead of WPP and Publicis.

## Company facts

- Ticker: OMC
- Founded: 1986
- Headquarters: New York, New York
- Domain: omnicomgroup.com


## Latest metrics

- Revenue: $6.2 billion Q1 2026 (consolidated, first quarter post-IPG); $17.27 billion FY2025 (+10.1% YoY)
- As of: 2026-03-31
- Source: https://www.sec.gov/Archives/edgar/data/29989/000002998926000011/omc-20260331.htm


## Recent filings

- 2026-04-28 — 10-Q: Q1 2026 (first full quarter post-IPG acquisition): consolidated revenue $6.2B; core operations revenue $5.6B (+6.7% YoY, organic +3.9%); non-GAAP adjusted EBITA $861.4M (13.8% margin); diluted EPS $1.35 (adjusted $1.90, +12% YoY). Company on track for $3.5B in share repurchases. (https://www.sec.gov/Archives/edgar/data/29989/000002998926000011/omc-20260331.htm)
- 2026-04-28 — 8-K: Q1 2026 earnings release: first full quarter post-IPG acquisition. Core operations revenue $5.6B (+3.9% organic growth), non-GAAP adjusted EBITA $833.5M (14.8% margin on core operations). (https://www.sec.gov/Archives/edgar/data/29989/000002998926000008/)
- 2026-02-20 — 10-K: FY2025 annual report: revenue $17.27B (+10.1% YoY). IPG acquisition closed November 2025. John Wren continues as CEO of combined entity. Standard annual disclosures including segment data for Cable Network Programming, Television, and Other. (https://www.sec.gov/Archives/edgar/data/29989/000002998926000006/omc-20251231.htm)


## Key facts

- Omnicom Group Inc. (NYSE: OMC) is one of the legacy 'Big Four' marketing-services holding companies, with brands spanning advertising, media buying, public relations, healthcare communications, and customer-relationship marketing — including BBDO Worldwide, DDB Worldwide, TBWA Worldwide, OMD, PHD, and the Annalect data-and-analytics unit. — Omnicom Group: https://www.omnicomgroup.com/
- Omnicom and Interpublic Group announced an all-stock merger on December 9, 2024 — Omnicom acquiring IPG in a deal valued at approximately $13.25 billion that would create the world's largest marketing-services holding company. — Omnicom Group: https://www.omnicomgroup.com/newsroom/omnicom-and-interpublic-to-combine/
- The Omnicom-IPG merger closed on November 26, 2025, creating the world's largest integrated marketing communications company. IPG was delisted from the NYSE at close on November 26, 2025. Omnicom CEO John Wren leads the combined entity; IPG CEO Philippe Krakowsky stepped down at close and was named Co-President and COO of the combined Omnicom alongside Daryl Simm. — PR Newswire / Omnicom Group: https://www.prnewswire.com/news-releases/omnicom-completes-acquisition-of-interpublic-forming-the-worlds-leading-marketing-and-sales-company-built-for-intelligent-growth-in-the-next-era-302627141.html
- Omnicom-IPG targeted approximately $750 million in annual cost synergies in the proposed combination — a figure that became the central focus of trade-press critique, including Stagwell CEO Mark Penn's prediction that the synergies would translate to roughly 7,500 affected industry roles. — MM+M: https://www.mmm-online.com/news/mark-penn-stagwell-ceo-on-omnicom-ipg/
- Omnicom reported $15.3 billion in 2024 revenue with operating income of approximately $2.4 billion; the company files standard SEC quarterly and annual reports as a New York Stock Exchange-listed company under OMC. — Omnicom Investor Relations: https://investor.omnicomgroup.com/financial-information/sec-filings
- John Wren has served as Omnicom Group's CEO since 1997 and as Chairman since 2018 — making him among the longest-tenured major-holdco CEOs in the industry. He led the IPG acquisition and continues as Chairman and CEO of the combined entity. His contract was extended through December 31, 2028 with a restructured package: $1 base salary plus a fully at-risk special stock option award tied to future share performance. — Omnicom Group — Corporate Leadership: https://www.omc.com/about/corporate-leadership/
- Omnicom's FY2025 10-K (filed February 20, 2026) reported full-year 2025 revenue of $17.27 billion (+10.1% YoY from $15.3B in 2024). TTM revenue through March 2026 was approximately $19.8B reflecting the IPG acquisition. — Omnicom 10-K FY2025 (SEC EDGAR): https://www.sec.gov/Archives/edgar/data/29989/000002998926000006/omc-20251231.htm
- Omnicom Q1 2026 10-Q (filed April 28, 2026): total revenue $6.2B (first quarter including former IPG); core operations (excluding dispositions) revenue $5.6B (+6.7% YoY organic +3.9%); non-GAAP adjusted EBITA $861.4M (13.8% margin); diluted EPS $1.35 (non-GAAP adjusted $1.90, +12% YoY). On track for $3.5B in share repurchases in 2026. — Omnicom 10-Q Q1 2026 (SEC EDGAR): https://www.sec.gov/Archives/edgar/data/29989/000002998926000011/omc-20260331.htm


## Related

- john wren (Chairman and CEO since 1997; led the IPG acquisition; contract extended through 2028) — https://thestateofstreaming.com/people/john-wren/
- interpublic group (Acquired November 26, 2025; formerly standalone Big Four holdco, now consolidated under Omnicom) — https://thestateofstreaming.com/companies/interpublic-group/
- stagwell (Challenger-holdco competitor; CEO Mark Penn publicly predicted ~7,500 roles affected by Omnicom-IPG synergies) — https://thestateofstreaming.com/companies/stagwell/
- mark penn (Stagwell chairman and CEO; most vocal public critic of the Omnicom-IPG merger during the regulatory window) — https://thestateofstreaming.com/people/mark-penn/
- wpp (Peer legacy marketing-services holding company; now second-largest globally behind Omnicom) — https://thestateofstreaming.com/companies/wpp/
- publicis groupe (Peer legacy marketing-services holding company; third-largest globally behind Omnicom and WPP) — https://thestateofstreaming.com/companies/publicis-groupe/


## External coverage

- Omnicom Group: Omnicom Group — corporate site (https://www.omnicomgroup.com/)
- Omnicom Group: Omnicom Investor Relations (https://investor.omnicomgroup.com/)
- 2024-12-09 — Omnicom Group: Omnicom and Interpublic to Combine in All-Stock Transaction (https://www.omnicomgroup.com/newsroom/omnicom-and-interpublic-to-combine/)

## Profile
Omnicom Group is one of the legacy 'Big Four' marketing-services holding companies — alongside WPP, Publicis, and now the defunct standalone Interpublic Group — with a portfolio of advertising, media-buying, public-relations, healthcare-communications, and CRM agency brands including BBDO Worldwide, DDB Worldwide, TBWA Worldwide, OMD, PHD, and the Annalect data-and-analytics unit. Headquartered in New York and trading on the NYSE under OMC, the company reported $15.3 billion in 2024 revenue; $17.27 billion in FY2025 (+10.1% YoY); and $6.2 billion in Q1 2026 — the first full quarter following the November 2025 close of the Interpublic Group acquisition.

The editorial reason Omnicom sits in our coverage as a tracked entity is the all-stock combination with Interpublic Group — announced December 9, 2024, valued at approximately $13.25 billion, and closed on November 26, 2025 — which consolidated Omnicom and IPG into the largest marketing-services holding company in the world and delisted IPG from the NYSE on the same date. The post-close leadership structure installed former IPG CEO Philippe Krakowsky and longtime Omnicom executive Daryl Simm as Co-Presidents and COOs reporting to Wren. The targeted approximately $750 million in annual cost synergies — revised upward to $900 million in 2026 guidance and $1.5 billion by mid-2028 — and Stagwell CEO Mark Penn's prediction that the synergies would translate to roughly 7,500 affected industry roles remain the most-cited public framing of the deal's human cost.

Omnicom CEO John Wren, who has led the company since 1997, now leads the combined entity. Omnicom files standard SEC quarterly and annual reports as a NYSE-listed company under OMC, with the most recent 10-K, 10-Q, and 8-K filings maintained on the Omnicom Investor Relations site and on EDGAR.
## Coverage on The State of Streaming
- [Omnicom Says It's Cutting Out the Ad-Tech Middlemen. The Holdco-Direct Era Just Went Live.](https://thestateofstreaming.com/advertising-adtech/2026/05/omnicom-ai-agent-adtech-disintermediation/) — 2026-05-04
- [Apple Services Just Posted Its Sixth Straight Record. The Compounder Hides in Plain Sight.](https://thestateofstreaming.com/business-deals/2026/05/apple-services-q1-fy26-record-trend/) — 2026-05-04
- ['Independent' Has Stopped Meaning Anything Buyers Can Audit](https://thestateofstreaming.com/opinion/2026/04/independent-adtech-stack-walled-garden-thesis-2/) — 2026-04-27
- ['Independent' Has Stopped Meaning Anything Buyers Can Audit](https://thestateofstreaming.com/opinion/2026/04/independent-adtech-stack-walled-garden-thesis/) — 2026-04-27
- [Amazon Wires the Identity Stack Together Before NewFronts](https://thestateofstreaming.com/advertising-adtech/2026/04/amazon-identity-stack-consolidation/) — 2026-04-26
- [Trade Desk Reframes Ventura as Multi-OS Ecosystem](https://thestateofstreaming.com/advertising-adtech/2026/04/trade-desk-ventura-ecosystem-pivot/) — 2026-04-25

## Tags

- holdco
- marketing-services
- public-company
- nyse
- advertising
- media-buying
- big-four
- no1-holdco
- ipg-acquisition
- john-wren

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