Omnicom has reportedly begun its restructuring in earnest after closing its deal to acquire Interpublic Group (IPG) last week, with the global advertising giant set to lay off 4,000 employees and fold a number of legacy firms’ operations into those of Omnicom shops.

FCB, which was one of IPG’s largest agency networks, will be merged into Omnicom’s BBDO, while both DDB and creative agency MullenLowe will be absorbed by Omnicom’s TBWA, according to a report from the Financial Times (FT), which cited discussions with company executives. Monday morning’s news comes on the heels of Omnicom Group’s acquisition of IPG, which was made official on Wednesday.

John Wren, Omnicom’s chairman and CEO, said more than 4,000 layoffs would result from the IPG merger, with the plan to cut primarily from administrative positions along with some dismissals among the leadership group, according to FT. IPG had already cut its workforce by roughly 6,400 in the past two years, reducing its staff count to 51,000, while Omnicom last year axed 3,000 members of its personnel to take its overall employee number to 75,000. Wren also reportedly told FT that the plan was to consolidate some regional networks and that there would be more restructuring among the group’s creative agencies than its media agencies.

Both IPG and Omnicom declined a request for comment from strategy.

The company also outlined a Connected Capabilities leadership team of CEOs to oversee its major operating groups in a news release on Monday.

Omnicom’s creative agencies, which will now work under the remaining creative networks BBDO, McCann, TBWA, will operate as part of Omnicom Advertising, led by Troy Ruhanen. Florian Adamski will head Omnicom Media, overseeing the remaining media networks Hearts & Science, Initiative, Mediahub, OMD, PHD and UM, as well as Acxiom. Chris Foster will lead Omnicom PR operations, overseeing FleishmanHillard, Golin, Ketchum, Porter Novelli and Weber Shandwick. Sergio Lopez will run Omnicom Production and Duncan Painter will oversee the Omni and Flywheel commerce platforms.

Additional groups, including health, branding and precision marketing, will be led by Michael Larson under Omnicom Diversified Agency Services. Luke Taylor, CEO of Omnicom Precision Marketing, will oversee agencies including Critical Mass, Credera and Rapp under Larson.

And Omnicom has also created two enterprise-wide teams intended to drive integration across the merged organization. A new client success group, led by chief client and business officer Jacki Kelley and client experience officer Andrea Lennon, will take senior accountability for cross-capability client co-ordination. A global growth team led by chief growth and solutions officer George Manas will manage enterprise-level new-business strategy. Manas will transition into that role from OMD Worldwide in February.

The company said the merged group will be organized around five “strategic advantages,” which include a scaled media ecosystem powered by Acxiom’s RealID and new ID-less solutions; expanded generative-AI capabilities for large-scale content creation; an integrated commerce offering linking marketing spend to sales outcomes; an enterprise-level investment strategy to accelerate the rollout of generative-AI across client operations; and a strengthened identity framework within Omni, which the company says now unifies 2.6 billion verified global IDs.

Omnicom says the combined capabilities will serve as the backbone for how data, creativity and technology are deployed across the network.