There is no shortage of commentary on why M&A deals fail. The statistics are familiar, the causes well documented, and the warning signs regularly repeated.

Yet across private equity portfolios, the same issue continues to surface: integration activity is often measured by activity milestones, not by whether it is delivering the investment case.

For PE-backed businesses, that distinction matters. Integration is not just about bringing companies together. It is about making value creation visible, credible and repeatable before exit.

Perhaps the more useful question is not why deals fail, but what success actually means in the first place.

Professor Geoff Meeks of Cambridge Judge Business School has spent years examining M&A outcomes. His conclusion is striking: many deals succeed on their own terms. The issue is that those terms are often not defined precisely enough, and that ambiguity is where value gets lost.

For private equity, the definition of success is ultimately reflected in value at exit: EBITDA growth, multiple expansion, and the credibility of the story a buyer is prepared to believe. The strategic logic behind buy-and-build is not primarily about synergies but about creating a more valuable business than the sum of its parts. WPP, during its growth period, was a masterclass in exactly this. Synergies matter, but in PE they are only valuable if they strengthen the exit case.

When that hierarchy is understood, the question of what integration should achieve becomes much easier to answer.

The core of why buy-and-builds work is the P/E multiple. It’s a simple thing… you’re buying at seven times profits and you’re hoping to exit at fourteen.

Hold periods are changing what integration needs to do

Hold periods are extending across the industry. The more significant effect, however, is psychological.

Portfolio companies do not revise their plans from five years to nine. What happens is that every year they ask whether an exit is possible in the next twelve months. That recurring uncertainty has a direct effect on how the business is run.

For any portfolio company pursuing a buy-and-build strategy, this creates a specific challenge. A prospective acquirer looking at a platform still operating as a collection of separate businesses will see exactly that. Sophisticated buyers will not pay for a story they cannot verify.

The answer is not to integrate everything immediately. It is to be deliberate about prioritisation.

ERP harmonisation is often a hygiene factor. What actually drives value creation is cross-selling, combined products, operational efficiencies and evidence that acquisitions are generating tangible returns. These should be prioritised ahead of systems alignment.

Businesses that can demonstrate how they are extracting value from each acquisition while remaining on a credible path to full integration have something more compelling than a tidy organisation chart. They have a repeatable M&A engine that buyers can understand and underwrite.

Bosch and Siemens both have a model you might call a “merger zone”: the principle is a framework that makes visible how acquisitions are generating value at each stage, without requiring full integration before that value can be recognised.

From our own experience, running an acquisition strategy and an exit process in parallel is entirely achievable. The key is having the structure in place that makes the value creation story legible to a buyer before they start asking questions.

If you’re always thinking you’re about to be on sale, it’s hard to do deals. An acquirer will look at you and say: you’re not integrated, you haven’t delivered the synergies. You’ve got a whole lot of work to do.

The leadership gap that no timeline accounts for

The private equity model, at its core, is straightforward. Put smart, incentivised and accountable people in place, give them ownership, and let them move quickly.

The model starts to break down when those people are not there.

In carve-outs, the gap is often structural. The CIO, CPO and CTO usually remain with the parent organisation. The permanent leadership team that will manage the business through its next phase does not exist on Day 1.

The same challenge appears in integrations, where the leadership coming across may not be the right team for what the business needs to become.

In a slower market, search timelines extend further. Risk aversion among candidates, combined with the natural caution of boards making permanent appointments in uncertain conditions, means the gap is rarely as short as anyone hopes.

Without accountable, incentivised, long-term leaders in place, decisions migrate upward. Deal partners become drawn into the day-to-day workings of the portfolio company.

This is where advisory support in the early stages carries more weight than is often acknowledged.

Who has the delivery experience to look a PE fund in the eye and provide genuine reassurance that what is being negotiated will actually work? That the TSA duration is realistic? That synergy assumptions are achievable?

Base rate fallacy remains a recurring feature of deal processes. Management teams consistently underestimate how long synergies take to materialise after close. Bringing experienced operators into those conversations before close, rather than after, is where a significant amount of avoidable pain can be prevented.

The biggest challenge for CFOs doing a deal is always balancing it with business as usual. You’ve still got stretch targets. You’ve still got budgets you’ve got to hit. And you’re doing this on top.

M&A is not a normal change project

When people go home after a deal is announced, the conversation with their friends and family is not about operating models or organisational structures. It is about whether their job is safe and what the future looks like.

That is an existential form of change, and it demands a different approach to communication, culture and leadership.

M&A is a skill that has to be learned. It is not something that automatically comes from years of running an organisation. Recognising that, and being willing to seek support, is not a concession. It is often the difference between value creation and value leakage.

Sometimes that support is substantial. Sometimes it is as simple as half an hour a week with someone who has seen the challenges before, can pressure-test decisions, and identify better routes through a problem before the wrong one gets locked in.

M&A is a skill that has to be learned. It’s not something that you pick up from running an organisation for ten years and getting to a leadership level.

A closing thought

The funds and management teams that consistently generate strong returns are clear-eyed about where value is being created and where effort is being spent on hygiene factors.

They define success before the deal closes. They focus integration activity on strengthening the exit story, not simply completing tasks. They put the right leaders in place quickly and know when to bring in experienced support before the cost of not doing so becomes visible.

The challenges described above surface repeatedly across deal types, sectors and investment cycles. They are all far easier to manage when anticipated rather than discovered.

Eton Bridge Consulting is a team of senior experienced practitioners who guide, and where needed, stay to deliver the results. If you are preparing for a transaction, integrating recent acquisitions, or trying to make the value creation story clearer ahead of exit, we would welcome the conversation.