Bankers weigh in: Navigating M&A with your corporate clients

Let’s not sugar-coat it: bank mergers and acquisitions are a real pain. For corporate clients of financial institutions, mergers and acquisitions (M&A) can affect payment processes, treasury operations, customer service relationships and the day-to-day confidence companies place in their bank. The way your bank prepares for and responds to the unpredictable reality of M&As can make or break corporate-clients relationships.

During a 2026 panel discussion, M&A leaders from experienced banks shared what they have learned from guiding clients through these high-stakes transitions, and why the banks that communicate clearly, plan early and lead with empathy are best positioned to protect relationships before, during and after conversion.

The truth: M&A starts with uncertainty

From the customer’s perspective, a bank merger can immediately introduce anxiety. Corporate clients may be wondering whether the people who understand their business will stay, whether timelines will fit their own priorities, or if they’ll have to absorb extra work for a change they did not ask for.

Clearing the air of confusion starts with thoughtful communication. Any banker that’s been through this process before knows just how important it is to explain the “why” behind a merger — and to explain it early and often.

While your customers understand the strategic rationale, they must be able to see what is in it for them for the process to go smoothly. Give them the context they need. Be clear and communicate that the merger will lead to better capabilities, stronger platforms, improved processes or expanded services. Without that context, the transition may feel like all pain and no gain.

Less mass messaging, more concierge-style service

The start of a merger is not the time to lump all your clients into one pool for the sake of streamlining. Even well-intentioned communications can miss the mark if they are too broad, resulting in your customers feeling unseen. Because of this, experienced bankers recommend segmenting customers by complexity, market, product usage or relationship needs, as this approach allows you to tailor communications to specific segments and identify what kind of migration support is needed for each area.

UMB Bank, for example, approached its acquisition of Heartland Financial by dividing migrations into pilot groups.

“We went from operating in eight states to operating in 13,” shares Gary Moore, Core Payments Product Manager at UMB Bank, “We didn't want [our new clients] to feel the burden of system migration or feel the gravity of all of those changes.” To make the process more seamless for everyone involved, Moore’s team split the newly migrated customers into different pilot groups.

“That gave us the opportunity to have specific targeting messaging in our early communications,” Moore explains. “It helped us understand the complexity that some markets have compared to other markets. And more importantly, it allowed us to work with our vendor partners to provide more of a concierge-type of service.” That gave the bank an opportunity to refine messaging, understand market-specific complexities and work closely with vendor partners to reduce the burden on clients using multiple treasury services.

The goal is to make the experience feel less like a mass conversion and more like concierge support. When relationship managers, product teams and service teams work together around the customer’s actual needs, the transition becomes easier to navigate.

Build internal trust, not resentment

Uncertainty isn’t just an issue clients deal with, but internal teams, too. Roles may double or become obsolete, the chain of command shifts, and without adequate communication and support, resentment can build.

“Communication is so critical, not only with your clients, but with your people,” shares Matt Ribbens, Head of General Bank Treasury Product Management at First Citizens Bank. When his bank merged with CIT Group in 2022, his approach for tackling this pain point was to create something like a buddy system.

“We spent a lot of time together with our teams,” Ribbens explained. He says this extra time together helped all parties better understand how to navigate the new landscape being created as both organizations came together. “It's important to not only lean in on communication but also lean in on culture. The more you can preserve that culture, that lets employees know what's to be expected of the new relationship.”

A rocky relationship with new peers will not go unnoticed by your corporate clients. Good internal communication results in good external communication, and the better your teams work together, the more supported your clients will feel.

Data matters, but relationships explain the data

Banks often enter a merger with large amounts of data on customers, products and systems. But data alone can be misleading without the context of people who know the client relationship.

“One of the most important things is the relationship,” advises Jeremy Waters, Director of Treasury Management Client Delivery at Zions Bancorporation. “Our customers aren't choosing to make this change like they would with any other change in their bank. And we have to equate that.”

To make the process as painless as possible, a true understanding of the client-bank relationship is key.

“There's a secret decoder ring that you have to understand from the acquiring bank,” Waters explains. “The key here is leveraging relationships with those that have been serving the customer, then pairing that with the data.” A customer may appear to fit neatly into one migration path based on product usage, but relationship managers or operations employees may know the nuances: custom templates, unique workflows, legacy arrangements or specific users inside the organization who depend on a service in a particular way.

To set the client up for ultimate success, Waters recommends pairing quality data with a greater understanding the customer's objectives from the right point of view.

“Going the extra mile, understanding the data and pairing that with the people who knew the data before is just so critical,” he says. “If you don't do that, you've missed the mark.”

Not only should bankers be helping their new corporate customers understand the “why” during the merger, but after, too. Being able to articulate that while strengthening the relationship is critical in helping customers stick around after the dust has settled.

“If you make sure that your data at the source is quality, then you set yourself up for success not only during the migration but post-migration as the customer experience truly kicks off,” Waters continues. “That's when we really have to make a difference in the eyes of the customer. We can say we’re delivering new and innovative solutions, but it comes down to how we deliver on it.”

Don’t wait to prepare for your next M&A

If you’re waiting to prepare for migration until your acquisition has been announced, you’ll just end up behind on your timelines. Instead, leaders should regularly ask themselves: If we acquired another institution today (or were acquired ourselves) how ready would our systems, products, teams and processes be?

“What you did even two years ago is different than what you would do today,” Waters goes on to explain, emphasizing how much the market has been reshaped since the advent of AI. For the least amount of road bumps, savvy bankers know how critical readiness is when entering a merger. That readiness includes reviewing operational processes, simplifying workflows where possible and understanding where systems could be integrated, lifted or shifted.

Readiness also includes maintaining current playbooks. While your bank may have a playbook for M&A, experienced bankers recommend treating it like a living document.

“We routinely go back and revisit what's in that playbook,” Waters continues. “Our organization is constantly asking: Is this playbook aligned with how we're running the business today? Do we have a simple process? Can it be improved upon?”

Banks can also prepare by evaluating system architecture, product alignment and vendor relationships before they are under the pressure of a hard conversion deadline. The more complexity a bank can resolve in advance, the smoother the next merger or acquisition is likely to feel for both employees and customers.

Execution requires flexibility, pilots and trusted partners

Even with strong planning, acquisitions rarely go exactly as expected. Portfolios may not divide cleanly. Customers may use products in unexpected ways. Asset acquisitions can introduce different challenges compared to full-bank acquisitions. Timelines may accelerate or stretch depending on regulatory, economic or business conditions. In short: acquisitions are unpredictable.

“It's never going to be smooth,” admits Kevin Malvey, Operations Executive and Head of Enterprise Fraud & Dispute Claims at U.S. Bank. “That's banking acquisitions. That's mergers.”

That’s why testing, piloting, learning and adjusting are essential. Pilot groups can reveal issues before they affect the broader client base. Gap analyses can help teams compare systems, identify holes in the client experience and make informed decisions about which platforms, processes or products to keep.

Experienced bankers also know that vendor partners can be a major source of support, helping organize timelines, support clients and reduce strain on internal teams.

“Don't forget to leverage your vendor,” Malvey concurs. “That’s a best practice. Leverage your vendors as best you can. It's one of those few opportunities that you have in banking where your pool of funding opens up to get [the job] done. You're on a hard deadline that you do not want delayed, so use [your budget] and leverage your vendors to organize that for you.”

The real work begins after conversion

When it comes to a successful M&A, it all boils down to endurance and empathy.

“This is a marathon, not a sprint,” Waters states. “All the preparation work you do leading up to the acquisition date is training for that race. Your marathon actually begins on Day One when those customers have migrated.” At that point, customers decide whether the combined bank delivers on its promise. Do the new solutions work as expected? Do employees understand the customer’s business? Are support teams responsive? Does the culture match what was communicated?

The success of M&A is measured not only by whether systems convert, but by whether customers and employees choose to stay, engage and grow with the combined institution. That demands strategy, discipline and operational rigor — but just as importantly, it requires empathy, flexibility and thoughtful, ongoing focus on the relationship.

“Have empathy and remember there's another person that this impacts,” concludes Moore. “For the company that's impacted by the acquisition, they didn't ask for us to acquire their bank. Have support in place to help them acclimate to the new culture or system they’re onboarding to. Just have a bit of empathy in that regard.”