At a glance
- Founded: 1986 (merger of BBDO, DDB, and Needham Harper Worldwide)
- Headquarters: New York, NY
- Chairman & CEO: John Wren
- Stock: NYSE: OMC
- IPG acquisition closed: November 26, 2025
- PR holding subsidiary: Omnicom Public Relations Group (OPRG)
- OPRG CEO: Chris Foster
- Cornerstone PR networks: Golin Ketchum, FleishmanHillard, Weber Shandwick, MMC
Overview
Omnicom Group was formed in 1986 through the merger of BBDO, DDB, and Needham Harper Worldwide. The company has grown through four decades of acquisitions across advertising, public relations, healthcare communications, digital, and media planning. The November 2025 IPG acquisition was the largest transaction in the holding company’s history — and the largest combination in the agency industry to date.
The IPG transaction was announced December 8, 2024 and approved by shareholders March 18, 2025. The U.S. Federal Trade Commission cleared the deal on June 23, 2025 with a consent order. Following final regulatory approvals in late 2025, the acquisition closed on November 26, 2025. Each share of IPG common stock was converted into 0.344 shares of Omnicom common stock. The combined platform has revenues of more than $25 billion and roughly 100,000 employees across 100+ countries — surpassing WPP for the global lead.
The Interpublic Acquisition (November 2025)
The IPG portfolio brought several major PR brands into Omnicom’s PR holding — including Weber Shandwick, Golin, R&CPMK, DeVries Global, Current Global, Carmichael Lynch Relate, and Jack Health. The combination immediately raised the question of how these brands would coexist with Omnicom’s legacy PR portfolio: FleishmanHillard, Ketchum, Porter Novelli, MMC, Rabin Martin, Cone Communications, and the public affairs network.
Chris Foster was named CEO of the combined PR holding — Omnicom Public Relations Group (OPRG). Foster’s first major decision: a restructuring of the overlapping legacy and IPG PR brands.
The February 10, 2026 Restructuring
On February 10, 2026, OPRG announced four restructuring moves.
1. Golin and Ketchum merged to form Golin Ketchum
Matt Neale, formerly Global CEO of Golin, was named CEO of the combined agency. Tamara Norman, formerly Ketchum U.S. CEO, was named Global President. Both brand identities are retained during the 2026 integration phase. The combined agency consolidates two of the oldest U.S. PR franchises — Ketchum (founded 1923, Pittsburgh) and Golin (founded 1956, Chicago). Golin’s 60+ year continuous relationship with McDonald’s — beginning in 1957 — is among the longest agency-client relationships in PR history.
2. Porter Novelli absorbed into FleishmanHillard
Porter Novelli became a dedicated brand under FleishmanHillard’s leadership. JJ Carter continued as Global CEO of the combined agency. Jillian Janaczek, formerly CEO of Porter Novelli, was named Americas CEO of FleishmanHillard. Cone Communications — which had operated under Porter Novelli since 2017 — moved with PN into the FH structure.
3. R&CPMK dissolved
Staff and clients were distributed across other OPRG brands. Certain entertainment specialty staff were absorbed by DKC, an independent PR firm outside the OPRG perimeter.
4. Several brands left unchanged
Weber Shandwick, MMC, and the public affairs network (DDC Public Affairs, GMMB, FP1 Strategies, Mercury Public Affairs, PLUS Communications, Portland Communications, VOX Global) continued operating without restructuring.
Sources: Axios (February 11, 2026); MARKETECH APAC (February 12, 2026); Omnicom Group SEC 8-K (November 26, 2025).
The Four Cornerstone Networks
Post-restructuring, OPRG operates with four cornerstone PR networks.
Golin Ketchum
Combined agency formed February 10, 2026. CEO Matt Neale; Global President Tamara Norman. Strongest practice areas: consumer brand communications, food and beverage, healthcare, technology, corporate communications, social and digital innovation, sports and entertainment. The combined firm holds one of the deepest historic franchises in U.S. PR — Ketchum’s century of corporate and consumer brand work, plus Golin’s six decades of consumer-brand campaigning and the McDonald’s relationship.
Read the full profile: Golin Ketchum: PR Agency Profile.
FleishmanHillard
Founded 1946 in St. Louis by Alfred Fleishman and Bob Hillard. Acquired by Omnicom in 1997. Global CEO JJ Carter (succeeded John Saunders, October 2024). Americas CEO Jillian Janaczek (post-Porter Novelli absorption, February 2026). 79 offices across more than 30 countries. Practice areas: brand communications, healthcare, technology, public affairs, reputation management, crisis, integrated marketing. Long-term client work spans Bayer, Chevrolet, Levi Strauss, and significant U.S. government accounts.
Read the full profile: FleishmanHillard: PR Firm Profile.
Weber Shandwick
Came into Omnicom via the IPG acquisition. Originally formed in 2001 from the merger of The Weber Group and Shandwick International. One of the largest PR agencies in the world by revenue and headcount, and one of the most-awarded global PR networks. Practice depth: corporate reputation, public affairs, healthcare, consumer, technology, financial communications, and crisis. Operates inside OPRG under existing leadership; not impacted by the February 2026 restructuring.
MMC (Marina Maher Communications)
Founded 1983 by Marina Maher. Specialty: marketing and branding for women’s products and women-targeted categories. Joined Omnicom in 2012. Eight Effies and 60+ industry awards in the firm’s history. Proprietary work in behavioral science and applied study of audience digital behavior. Clients have included Tide, Depend, CoverGirl, Johnson & Johnson, and Acuvue. Not impacted by the February 2026 restructuring.
Public Affairs Portfolio
The OPRG public affairs network operates separately from the cornerstone networks and was unchanged by the February 2026 restructuring:
- DDC Public Affairs — grassroots and grassroots digital
- GMMB — issue advocacy, political communications
- FP1 Strategies — Republican-leaning political communications
- Mercury Public Affairs — bipartisan government affairs
- PLUS Communications — strategic communications and public affairs
- Portland Communications — UK-headquartered international public affairs (merged with GPlus in 2019)
- VOX Global — issues management and public affairs
Specialty and Retained Brands
Beyond the cornerstone networks, OPRG includes several specialty PR brands — some legacy Omnicom, some retained from the IPG portfolio.
Rabin Martin
Global health strategy firm. Joined Omnicom in May 2016. Headquartered in New York with offices in Geneva, London, and Los Angeles. Notable work includes Merck for Mothers and large-scale public-health initiatives across emerging markets.
DeVries Global
Founded 1976. Beauty, fashion, wellness, food. Arrived inside OPRG via the IPG acquisition in November 2025.
Current Global
Founded 1989 as Current Marketing. Consumer brands, healthcare, social impact. Arrived inside OPRG via the IPG acquisition in November 2025.
Jack Health
Founded 2017. Healthcare communications. Arrived inside OPRG via the IPG acquisition in November 2025.
Carmichael Lynch Relate
Consumer brand and integrated communications. Arrived inside OPRG via the IPG acquisition in November 2025.
Cone Communications
Boston-headquartered. Corporate responsibility, purpose, and brand reputation. Joined Omnicom in 2014. Operated under Porter Novelli from 2017; moved into the FleishmanHillard structure with the February 2026 Porter Novelli integration.
Brodeur Partners
Founded 1985. B2B technology, healthcare, and corporate reputation. Omnicom acquired Brodeur in 1993; firm leadership bought back the majority stake in 2011 with Omnicom retaining an equity position. Headquartered in Boston.
Publicis Groupe — the Other Side of the Holding-Company Map
Omnicom does not stand alone at the top. Publicis Groupe — Paris-headquartered, the world’s third-largest communications group — runs the other major global network. Its PR arm is MSL (formerly MSLGROUP), operating alongside Saatchi & Saatchi, Leo Burnett, Zenith, and Publicis Worldwide. Publicis built MSL’s footprint through a sequence of acquisitions on multiple continents — including CNC in Germany (strategic, financial and corporate communications) and BBR Group in Israel (220 professionals across Saatchi & Saatchi, Zenith, and a network of local agency brands).
The proposed 2013 Publicis-Omnicom merger would have collapsed both groups into a single $35-billion-plus holding company. The deal was abandoned in 2014. A decade later, Omnicom answered it with the IPG acquisition instead — leaving Publicis and Omnicom as the two largest standalone holding-company structures in the global communications industry.
Leadership
- John Wren — Chairman and CEO, Omnicom Group
- Chris Foster — CEO, Omnicom Public Relations Group
- JJ Carter — Global CEO, FleishmanHillard
- Matt Neale — CEO, Golin Ketchum
- Tamara Norman — Global President, Golin Ketchum
- Jillian Janaczek — Americas CEO, FleishmanHillard
Why It Matters in the Category
Omnicom’s acquisition of IPG created the largest marketing and communications holding company in the world — surpassing WPP. The PR portfolio inside OPRG now competes with WPP’s Burson (formed in 2024 from BCW and Hill+Knowlton) and Publicis Groupe’s MSL across the global enterprise PR category.
The February 2026 restructuring is OPRG CEO Chris Foster’s first defining decision. The central question — for clients, talent, and the wider industry — is whether the integration delivers the promised scale advantages or generates the dis-synergies typical of large agency consolidations.
Three structural shifts buyers should track:
- Roster consolidation. Several Omnicom and IPG agencies have overlapping client rosters and overlapping practice areas. Expect account migrations, conflict-clearance reviews, and selective brand consolidation through 2026 and 2027.
- Senior-talent movement. Major holding-company combinations historically trigger an exit wave of senior practitioners — to boutiques, to independents, and to in-house roles. The Omnicom–IPG integration is already producing measurable movement, and the independent firms are the structural beneficiaries.
- Pricing and category pressure. The new platform is large enough to reshape category pricing across the global enterprise PR market. Independent firms are positioning against scale with specialization and senior-bench attention — the historical counter-positioning to holding-company consolidation.
FAQ
When was Omnicom Group founded?
1986, through the merger of BBDO, DDB, and Needham Harper Worldwide.
Who is the CEO of Omnicom?
John Wren — Chairman and CEO.
When did Omnicom acquire Interpublic Group?
November 26, 2025. The acquisition was announced December 8, 2024 and approved by shareholders March 18, 2025.
What is Omnicom Public Relations Group (OPRG)?
The PR holding subsidiary inside Omnicom Group, led by CEO Chris Foster. Operates with four cornerstone networks (Golin Ketchum, FleishmanHillard, Weber Shandwick, MMC), a public affairs portfolio, and several specialty PR brands.
What changed in the February 10, 2026 OPRG restructuring?
Four moves: (1) Golin and Ketchum merged to form Golin Ketchum; (2) Porter Novelli was absorbed into FleishmanHillard; (3) R&CPMK was dissolved; (4) Weber Shandwick, MMC, and the public affairs network were left unchanged.
Who runs Golin Ketchum?
CEO Matt Neale (formerly Golin); Global President Tamara Norman (formerly Ketchum).
Who runs FleishmanHillard?
Global CEO JJ Carter; Americas CEO Jillian Janaczek (formerly CEO of Porter Novelli).
Key Takeaways
- Omnicom Group is the world’s largest marketing and communications holding company following its November 26, 2025 acquisition of Interpublic Group.
- Omnicom Public Relations Group (OPRG), led by CEO Chris Foster, holds the combined PR portfolio.
- February 10, 2026 restructuring consolidated overlapping brands: Golin + Ketchum → Golin Ketchum; Porter Novelli → FleishmanHillard; R&CPMK dissolved.
- Four cornerstone networks: Golin Ketchum, FleishmanHillard, Weber Shandwick, MMC.
- Public affairs network unchanged: DDC, GMMB, FP1 Strategies, Mercury Public Affairs, PLUS Communications, Portland Communications, VOX Global.
- Retained IPG PR brands: Weber Shandwick (cornerstone), DeVries Global, Current Global, Carmichael Lynch Relate, Jack Health.
- The combined entity competes against WPP’s Burson and Publicis Groupe’s MSL across the global enterprise PR category.
