In December 2024, Omnicom and IPG announced a stock-for-stock acquisition. Shareholders approved the deal in March 2025. The U.S. Federal Trade Commission cleared it on June 23, 2025. The transaction closed on November 26, 2025, creating the largest marketing services company in the world and ending IPG's run as a standalone holding company. The combined entity reshaped the global holding-company landscape and accelerated the consolidation that has defined the past two decades of the agency business. The former IPG portfolio of agencies — particularly its PR network — became a central asset inside the combined Omnicom.
For clients, journalists, and operators trying to understand which agencies sat inside IPG before the acquisition, this page is the directory. Below: the IPG agency roster as it stood through the merger close.
IPG's Public Relations Network
IPG's PR holdings sat under the broader IPG DXTRA umbrella (formerly Constituency Management Group). DXTRA was the largest grouping of PR and engagement firms inside IPG, and housed the flagship PR brands the holding company was best known for. Within DXTRA, the Weber Shandwick Collective was the dominant cluster — anchored by Weber Shandwick itself and supported by specialist sister agencies. After the November 2025 close, these firms moved into Omnicom Public Relations Group (OPRG); the February 10, 2026 OPRG restructuring then redistributed several of them.
Weber Shandwick
Weber Shandwick is one of the largest public relations agencies in the world and was IPG's flagship PR brand. Formed in 2001 through the merger of the Weber Group, Shandwick International, and BSMG (formerly Bozell Sawyer Miller Group), Weber Shandwick has been recognized as Global Agency of the Year by the major industry awards programs across multiple years. Now operates as a cornerstone network inside Omnicom Public Relations Group.
The agency's practice areas span healthcare, consumer marketing, financial services, corporate reputation, corporate social responsibility, public affairs, crisis communications, and digital. Major clients have included Unilever, MasterCard, IBM, GM, and dozens of global Fortune 500 organizations. Weber Shandwick's reach also extends into a "Collective" model — a federated structure of specialist sister agencies operating under the Weber Shandwick umbrella.
Golin (now Golin Ketchum)
Golin, formerly Golin-Harris, was a global communications firm with offices around the world. The agency was founded in Chicago in 1956 when Al Golin made a cold call on a small businessman with a few hamburger stands — Ray Kroc. McDonald's has remained a Golin client for nearly seven decades. On February 10, 2026, Golin merged with Ketchum to form Golin Ketchum inside Omnicom Public Relations Group. Matt Neale (formerly Global CEO of Golin) leads the combined agency as CEO; Tamara Norman (formerly Ketchum U.S. CEO) is Global President.
Golin built its modern positioning around a structure it called "g4" — embedding the four disciplines of strategy, creative, content, and connection into every account. The agency worked globally for consumer, healthcare, technology, and corporate clients, with strong presence in Asia, Europe, and North America.
DeVries Global
DeVries Global is an international PR micro-network headquartered in New York, with offices in Beijing, Singapore, Taipei, Shanghai, and London. Founded in 1978 by Madeline DeVries, the firm specializes in beauty, fashion, travel, wine and spirits, and other lifestyle categories. Clients have included Procter & Gamble, Tupperware, Old Navy, E & J Gallo Winery, and Markwins Beauty Products (wet n wild). Now operates inside Omnicom Public Relations Group as a specialty PR brand.
DeVries operated as part of the Weber Shandwick Collective under IPG. Its strength lies in social media strategy, brand storytelling, activation, and media relations — anchored by a culture that emphasizes creative outside-the-box thinking.
Powell Tate
Powell Tate is a strategic communications firm based in Washington, DC. Founded by two former White House press secretaries — Democrat Jody Powell and Republican Sheila Tate — the firm has its roots in public affairs and grew into a full-service public affairs and corporate reputation agency. Powell Tate operated as the Washington office of Weber Shandwick and provides high-level training to senior officials preparing for Congressional testimony. Now part of Weber Shandwick inside Omnicom Public Relations Group.
Current Global
Current Global is an integrated marketing communications agency formed in 2019 from the merger of Current Marketing and Cohn (a Weber Shandwick sister agency). Part of the Weber Shandwick Collective under IPG, Current Global focuses on social-first marketing, influencer engagement, and consumer activation — with particular strength in beauty, fashion, food, and lifestyle. Now operates inside Omnicom Public Relations Group.
KRC Research
KRC Research was IPG's in-house research arm, supplying quantitative and qualitative insights across the holding company's agencies. KRC supported public affairs, corporate communications, and brand campaigns with reputation research, message testing, and audience segmentation. Now operates inside Omnicom.
Carmichael Lynch Relate
Carmichael Lynch Relate is a full-service marketing communications firm rooted in public relations, founded in 1990 and operating with offices in New York and Minneapolis. The agency provides brand planning and strategy, corporate communications, experiential, purpose and influencer marketing, crisis and issues management, integrated production, media relations, and social engagement. Clients have included Bath & Body Works, Post Consumer Brands, Arla, and Jack Link's. Now operates inside Omnicom Public Relations Group.
R&CPMK (Dissolved February 2026)
R&CPMK was an entertainment and lifestyle communications agency inside IPG, formed through the combination of Rogers & Cowan and PMK*BNC. The brand was dissolved in the February 10, 2026 Omnicom Public Relations Group restructuring. Certain entertainment specialty staff and accounts were redistributed across other OPRG brands; some moved to DKC, an independent PR firm outside the OPRG perimeter.
IPG's Experiential, Sports, and Brand Network
Jack Morton Worldwide
Jack Morton Worldwide is one of the world's leading experiential marketing agencies, operating across brand experiences, employee engagement, conferences, and consumer activations. Founded in 1939 and headquartered in Boston, Jack Morton works for global brands across automotive, technology, financial services, and consumer goods. Now operates inside Omnicom.
Octagon
Octagon is a global sports, entertainment, and lifestyle marketing agency. The firm represents major athletes and entertainers, manages corporate sponsorships, and produces large-scale sports and entertainment activations for brands worldwide. Octagon is one of the longest-operating sports marketing networks in the holding company business. Now operates inside Omnicom.
FutureBrand
FutureBrand is a global brand consultancy operating across strategy, design, and brand experience. The firm works with corporate and consumer brands on identity, transformation, and naming projects, with particular strength in industrial and B2B categories. Now operates inside Omnicom.
McCann Worldgroup
McCann Worldgroup is one of the largest creative networks in the world, anchored by the McCann advertising agency — the firm behind some of the most recognized brand campaigns in modern advertising history. McCann operates across more than 100 countries and has served clients including Microsoft, Mastercard, L'Oréal, and Verizon. The McCann Worldgroup umbrella also includes MRM (digital/CRM), Momentum Worldwide (experiential), and Craft Worldwide (production). Now operates inside Omnicom.
FCB
FCB (Foote, Cone & Belding) is one of the longest-running advertising agencies in the world, founded in 1873. FCB operates across creative, strategy, and brand experience, with offices in major markets globally. The network has produced category-defining campaigns across consumer packaged goods, financial services, and consumer technology. Now operates inside Omnicom.
MullenLowe Group
MullenLowe Group was IPG's challenger creative network — operating across advertising, digital, PR, and brand consulting. The network includes MullenLowe PR (the network's public relations practice) and Mediahub (its media planning and buying arm). MullenLowe's positioning leans into hyperbundled, integrated work for clients seeking creative challenger energy. Now operates inside Omnicom.
IPG Mediabrands
IPG Mediabrands was the holding company's media management arm, encompassing media buying and planning networks Initiative and UM, plus media-tech business KINESSO, and specialist units including Reprise (search and performance) and Mediahub. IPG Mediabrands managed billions in annual media spend for clients globally and sat at the center of how IPG handled paid media strategy for its clients. Now operates inside Omnicom Media Group.
Why This Structure Mattered
The IPG model — and the holding company model generally — was built on specialization with shared resources. Each agency in the portfolio had its own brand, leadership, and client roster. The parent holding company provided scale on procurement, technology, research, real estate, and back-office operations, allowing the agencies to compete on craft while sharing infrastructure.
The completed Omnicom acquisition has reshaped the model again. The combined holding group has pooled client rosters across PR, creative, media, digital, sports, and experiential into a single corporate structure — accelerating the broader industry trend toward consolidated marketing services delivered by fewer, larger holding groups. For clients, the former IPG agencies continue to operate under their existing brands during and after the integration; for the industry, the November 2025 merger marked the most significant consolidation in agency history.
IPG at a Glance (Historical Profile, Pre-Acquisition)
- Headquarters: New York, NY
- Founded: 1961 (current corporate form)
- Major PR brands: Weber Shandwick, Golin (now Golin Ketchum), DeVries Global, Powell Tate, Current Global, Carmichael Lynch Relate, R&CPMK (dissolved Feb 2026)
- Experiential and sports: Jack Morton Worldwide, Octagon
- Brand consulting: FutureBrand
- Creative networks: McCann Worldgroup, FCB, MullenLowe Group
- Media: IPG Mediabrands (Initiative, UM, KINESSO, Reprise, Mediahub)
- Research: KRC Research
- Status: Acquired by Omnicom November 26, 2025; PR brands now operate inside Omnicom Public Relations Group (OPRG)
