Marketing Through Mergers and Acquisitions

How to build clarity when everything is still foggy

There’s a moment after an acquisition closes when the expectation is deceptively simple: start marketing.

The problem? The foundation isn’t there yet. No finalized brand architecture. No aligned messaging. No org chart that anyone fully agrees on. But the business is moving, and marketing has to move with it.

This scenario is more common than most companies admit. McKinsey research on mergers and acquisitions (M&A) integration found that marketing was meaningfully involved before close in only half of acquisitions. Yet, it’s one of the most critical functions for protecting revenue and capturing growth in the new organization.

When the work starts before the plan exists

In most M&A situations, the deal closes long before the marketing infrastructure catches up. That creates a phase that doesn’t get talked about enough: actively marketing through ambiguity.

Campaigns go out. Websites start evolving. Sales teams need materials. All while the bigger picture is still taking shape.

This chaotic period isn’t a failure of planning. It’s the reality of integration. And it’s where some of the most important strategic work actually happens.

The “blurry middle” is where the real work happens

Our client, Adherex Group, came together through multiple acquisitions. Each company that came into the fold had its own customers, its own reputation, its own way of talking about what it did. There wasn’t time to hit pause while the pieces got sorted out. The business kept moving, which meant marketing kept moving, even when the full picture wasn’t clear yet.

From the outside, that probably looked messy. From the inside, it was just the work.

“Messiness” is often just exploration

For a while, customers encountered overlapping offerings and weren’t always sure what distinguished them. Internal teams used different languages to describe the same things. None of that was ideal. But it wasn’t a failure either. It was the natural result of multiple businesses merging into one in real time, without pause.

What that phase produced, unexpectedly, was clarity—just not the kind that comes from a brand strategy deck. It came from watching where things broke down:

• Messaging that didn’t hold up.
• Audiences that weren’t connecting.
• Distinctions that turned out to matter more than expected.

Marketing, in that sense, was doing something more useful than promoting. It was revealing and clarifying.

The segmentation finding was the turning point. McKinsey’s research points to this as one of the highest-leverage moves in mergers and acquisitions, and the Adherex experience bore that out. Two audiences, distinct in what they needed: distributors focused on speed and access, versus OEMs and engineers focused on technical performance and customization. The company served both, but the marketing had been trying to do it with one voice. Separating them changed everything.

Depth over simplicity: Crafting models that reflect real life

In the new model that emerged over this period, an umbrella brand (the Adherex Group) anchored the organization. Under it, a distributor brand built for buyers who need fast answers and reliable product access. Separately, an OEM/engineering brand with a focus on customization and capabilities. These two divisions unified half a dozen unique companies that held their place in the new system as product brands, carrying the recognition they’d spent years building. Nothing was erased. It was organized.

From blurry to meaningful marketing

Nearly a year of building, but it was the right kind of slow. The kind that produces something durable. McKinsey’s data backs this up: rigorous marketing integration can double the rate of revenue synergies captured. Cutting corners in this phase costs more than the time saved.

By the end, the marketing strategies looked different. Campaigns were built around specific audiences, not shared assumptions. Emails were segmented. Content had a clear job to do. The foundation wasn’t just stronger. It was finally the right size for where the business was heading.

This pattern shows up everywhere

Adherex isn’t the only company that has been through this. A technology client went through something similar. Friction in their marketing efforts didn’t ease up until Canadian and U.S. audiences were treated as genuinely different markets, rather than regional variations of the same market. One of our insurance clients finds success by letting each one of their specialty groups have its own lane. Different industries, same lesson: premature unification creates confusion. Audience-first structure creates room to grow.

McKinsey puts it plainly: the most successful mergers and acquisitions resist the temptation to do too much too fast. Instead, successful M&A focus on a short list of high-impact priorities that protect existing revenue while building toward future growth.

The real marketing lesson behind the muddy middle of mergers and acquisitions

Marketing through mergers and acquisitions isn’t about waiting for everything to be perfect before you act.

It’s about building clarity while things are still evolving and using marketing itself as a tool to uncover the structure that should exist.

That means working without all the answers. It means being willing to refine as you go. And it means trusting that the “blurry middle” isn’t a detour. It’s part of the process.

Because the goal isn’t just to get through integration.

It’s to come out the other side with something stronger: brands with purpose, audiences clearly defined, and marketing that finally works the way it’s supposed to.

Clarity isn’t something you wait for after an acquisition. It’s something you build while everything still feels unclear.

Need help navigating the murky middle of M&A? Get in touch.