Bolt-on acquisitions: a corporate development playbook for Europe

The case for a programme rather than a series of deals is supported by the largest recent study. L.E.K. Consulting analysed more than 5,400 publicly traded companies over 2016 to 2025 and found that serial acquirers outperformed organic-only companies by more than 14% on a weighted-average total shareholder return basis. It defines serial acquirers as companies that made at least one acquisition every year for three consecutive years. Only 8% of companies qualified. Most acquirers, in other words, do not behave like programmes. The study covers listed companies, but the behaviours it describes, regular deal flow and consistent practice, are as relevant to a private mid-market group.

Those 8% account for a disproportionate share of activity. L.E.K. reports that serial acquirers accounted for more than half of deals by volume and at least one-third by value. Bain & Company uses a stricter definition in its 2025 review: frequent acquirers made 10 or more acquisitions over the past 10 years. Either way, repeat buyers are a small minority who do much of the work. The data also show that frequency is a capability, not an accident, and that it can be built deliberately. The lesson for a European acquirer is that a track record of closing and integrating small deals is itself an asset that sellers and advisers notice.

A caution is needed. These are correlations from public companies, and strong businesses may acquire more often because they are strong. The findings do not prove that any company that starts acquiring will outperform. For a head of corporate development, the useful reading is narrower: the companies that do bolt-ons well do them repeatedly, with discipline, and over many years. The advantage appears to come from compounding experience, which a team can plan for even if returns are never guaranteed. It is also worth separating the question of whether to acquire from the question of how, since the second is the part a team controls.

Begin by defining the programme in numbers: how many bolt-ons you intend to complete in each of the next three years, in which themes, at what size and with what capital. Write it as a one-page charter that the executive committee and board approve. A programme without a charter is a hope. A charter gives the team a mandate, lets the board judge progress and makes it easier to say no to the deal that does not fit. Review the charter annually, and update the numbers as evidence accumulates about what the team can actually deliver.

McKinsey's research on programmatic M&A is based on the Global 2000, the 2,000 largest public companies over a decade, which did 21,000 deals valued at almost $7 trillion. About 70% of deal activity comprised deals too small to measure one at a time. Programmatic acquirers in the sample did a median of 3.6 deals per year, though many did five, ten or fifteen. The scale of small-deal activity is the surprise: the bulk of the market is exactly the kind of transaction a mid-market team will pursue. That scale is also a reminder that most acquisitions are never reported in headlines, which is why a pipeline built on relationships matters.

McKinsey's second finding is about focus. Even the most adept programmatic acquirers can handle at most three M&A themes at a given time. A theme is a defined area, such as adding a capability, entering a region or consolidating a fragmented segment, in which the acquirer has a reason to be a preferred buyer. A list of six or twelve themes, in McKinsey's view, is a sign that priorities have not been set. The discipline is to choose the two or three where success is most likely. Focus is therefore a design choice about where to be excellent, and it should be made before the target list is built.

For a mid-market team with limited people and capital, this finding is especially useful. Focus concentrates relationship-building, so that the same owners hear from you repeatedly. It concentrates learning, because each deal teaches something applicable to the next. And it concentrates credibility with advisers, who pass on opportunities to buyers they know are serious. Spreading across many themes reproduces the project model, with each deal starting from scratch and no accumulated advantage for the next one. It also makes the programme easier to explain to the board, because each theme has a clear rationale and a single accountable owner.

Run a theme workshop with the executive committee and choose no more than three. For each, write the strategic logic in two sentences, the size of the opportunity, the ten to thirty companies that fit, and what the acquirer brings that others do not. Name a team member as theme owner. Review the themes annually and retire any that have not produced a conversation with a credible target within twelve months. Keep the number of live targets per theme manageable, so that every conversation receives a proper follow-up.

Clear criteria are the cheapest control in a programme. They define size, sector, geography, financial profile, culture, ownership situation, integration complexity and price discipline. L.E.K. defines a bolt-on as a target representing 0-20% of the acquirer's revenue, as distinct from a significant investment at 20-70% or a merger of equals above that. Using such a definition focuses the team on deals that the organisation can absorb without disrupting its core business. Criteria also protect the team in negotiation, since walking away is easier when the line was drawn in advance by the board.

Price discipline is the other half of criteria. Bain's work on buy-and-build in private equity illustrates the logic. In the VetCor example it describes, smaller practices could be acquired at a mid-single-digit EBITDA multiple, against a mid-teens multiple for the platform, and the company grew from 41 practices in 2010 to about 350, adding two or three each month. The lesson for corporate acquirers is not to copy a financial model but to recognise that small targets often price differently, and that criteria should state the multiple range the team will accept. Small targets usually come with owner-managers, so the criteria should also cover what happens to the seller after completion.

Bain also observes that add-ons that were at least the fourth acquisition by a single platform company rose from 21% in 2003 to closer to 30% in recent years. Buy-and-build is therefore a more common pattern than it once was, and sellers and advisers increasingly understand it. For a corporate acquirer, written criteria are a signal as well as a filter: advisers who understand your criteria will bring you the right companies, and sellers will see that you are organised. Over time, criteria can be refined using the results of earlier deals, which is one way the programme learns.

Draft a one-page criteria sheet with must-haves, nice-to-haves and deal-breakers, and agree it with the executive committee. Include the maximum size as a share of revenue, a valuation range, and tests for customer concentration, key-person dependence and technology fit. Add a scoring grid so that every target is assessed the same way. Share the criteria with the corporate finance advisers and brokers who cover your theme, since they are often the first to see an opportunity. Review the grid after every deal and every rejected target, and record why decisions were taken.

Bolt-on activity moves in cycles that punish teams without a standing pipeline. Research by Stevens & Bolton, reported by AlphaMaven, found that UK mid-market buy-and-build activity fell 61% year on year in 2025, after the 45 most active serial acquirers completed 114 add-on acquisitions in 2024, the highest in a five-year review period. Business services accounted for 36% of 2025 bolt-ons, with financial services and consulting each at 16%, while technology bolt-ons fell 80%, insurance 85% and education 71%. The five-year context matters: 2024 was the high point of the review period, which makes the fall in 2025 especially striking.

Europe's broader picture is different, which is itself informative. LSEG reports that European M&A reached an eight-year high in early 2026, and 58% of middle-market respondents expect deal volume to climb in 2026. Ropes & Gray notes that the UK, France and Germany make up 46% of European private equity deals by number, and that deal count in the third quarter of 2025 was up 36% on a year earlier. The cycle, in other words, can turn quickly, and different sectors and countries diverge. The sources measure different things, so they should be read as signals about direction rather than as a single consistent series.

For a head of corporate development, the lesson is that sellers become available when conditions change, not when your team is ready. Teams with a warm pipeline can act when a founder decides to sell, a sponsor needs an exit or a competitor stumbles. Teams that begin sourcing only when the board asks for a deal compete from a cold start. A warm pipeline is not a list of names; it is a set of owners who know you, trust your intentions and have told you roughly when they might be ready. Warmth is also a protection against paying too much, because a trusted buyer can negotiate bilaterally rather than in an auction.

Build and maintain a pipeline tracker with every target in your themes, the owner, the last contact, the next step and a view on timing. Contact each priority target at least twice a year without an offer, with something useful such as sector insight or an introduction. Track the share of targets contacted, meetings held and relationships rated warm. Report the pipeline to the executive committee each quarter alongside the live deals. Where possible, agree a light-touch rhythm of contact that does not depend on any one team member, so continuity survives staff changes.

Global M&A headlines are dominated by scale. Bain estimates that 2025 deal value rose 40% to $4.9 trillion, with volume up 7%, and that megadeals above $5 billion represented more than 73% of the incremental deal value. Scope deals accounted for 60% of large deals above $1 billion, the highest share Bain has observed, reflecting a focus on revenue growth through new capabilities and markets. The attention of advisers, boards and the press naturally goes to the largest transactions. The totals are global and mix many deal types, so they describe the environment in which mid-market acquirers operate rather than their own market.

The pattern among buyers is instructive. Bain found that infrequent acquirers accounted for about 59% of megadeals in 2025. Big deals are, by their nature, rare events for the companies that do them, and they carry the risks of limited experience. By contrast, McKinsey shows that most deals are small and that programmatic acquirers do them repeatedly. The two sets of data describe different games: one is episodic and high stakes, the other is continuous and cumulative. This should not be read as a criticism of large deals, only as a description of how rarely most companies do them.

For the mid-market acquirer, this suggests a competitive position. Smaller targets receive less attention from large buyers, often come from founders who value cultural fit and continuity, and can be integrated by a team that has done similar work before. A company that is well known in its niche, responsive and reliable may be preferred even when it does not offer the highest price. That position is built by consistent behaviour over years, not by a single successful bid.

Decide explicitly which game you are playing. If the strategy is bolt-ons, set the budget, headcount and governance for a continuous programme, and avoid being drawn into larger deals that would stretch the balance sheet and the integration team. Create a simple rule that any proposal above the bolt-on threshold goes to a separate strategic review. This protects the programme from distraction and signals to the market what kind of buyer you are. Revisit the rule each year, since a growing company's definition of a bolt-on rises with its revenue.

Buying small and combining into something larger can create value, but only when the combined business works as one. The L.E.K. study offers a useful signal on integration: non-serial acquirers that announced synergy targets saw roughly 2-3% better total shareholder return on bolt-on transactions. A public commitment is not the same as delivery, yet it indicates that setting and owning targets is associated with better outcomes. It shows, too, that integration planning deserves as much attention as deal selection. The same logic applies to private bolt-ons, where sellers and advisers form their view of a buyer from its behaviour on earlier deals.

The Bain example of VetCor shows what repeatability can look like in practice: a platform that adds practices at a steady pace, each following a familiar path. Bain also notes that 10% of add-on cases were at least the tenth sequential acquisition, which implies that some buyers refine their approach over many iterations. The principle transfers to corporate acquirers: the integration of the fifth bolt-on should be quicker than the first because the steps, owners and systems are known, and exceptions are handled by rule. We would add that repetition helps only if lessons are recorded, which is why post-deal reviews are part of the programme.

The implication is that the integration playbook should be designed before the first target is signed, and tested on the earliest deals. It should cover day-one communications, customer and employee retention, finance and reporting, systems, commercial synergies and cultural integration. It should name an integration owner who is not the deal lead, so that the transition from negotiation to delivery is explicit. Having the same owner for each deal also builds expertise inside the company.

Draft a hundred-day integration plan with the same structure for every bolt-on: the first week, the first thirty days, the first sixty and the first hundred. Define a small set of synergy targets with an owner, a metric and a date. Review progress fortnightly and capture lessons after each deal into the playbook. Keep the playbook short enough that it is used, and make the integration owner accountable for updating it. Treat the playbook as a living document, and assign a named person to maintain it.

Capital conditions affect both the supply of targets and the cost of buying them. Herbert Smith Freehills Kramer reports that the European Central Bank cut its deposit rate once in 2025, in June, to 2.0%, and then paused, and that sponsors re-engaged with add-ons in 2025 as dry powder remained abundant. Sponsors are both competitors for targets and potential buyers of companies you may eventually sell. Teams should know who is active in their themes and how they behave. Financing costs and seller price expectations both affect payback, so the programme should state the return it requires before it negotiates.

Governance sets the speed at which the team can move. McKinsey describes three stage gates in a mature programme: strategy approval, approval to negotiate and begin diligence, and deal approval. Clear delegated authority for small deals avoids the delay of full board consideration for each one. Within limits agreed by the board, the corporate development team and the finance function should be able to move quickly, which matters when a founder wants to transact within weeks. Delegation works best when the limits are clear, reported and reviewed, so that the board retains confidence in the controls.

The implication is that financing and governance should be agreed before the pipeline produces a live opportunity. Decide the funding sources, the leverage the business will accept, the approval thresholds and the delegation for sub-threshold deals. Agree how earn-outs, deferred consideration and retention packages will be used. Document the process so that each deal follows the same route. Delays and ad hoc debates about authority cost credibility with sellers, who often judge buyers on their ability to execute. Consistent terms and a clear process also make the buyer easier for sellers and advisers to deal with.

This article is general information, not investment, legal or tax advice. Cross-border bolt-ons in particular involve competition, employment, data protection and tax considerations that differ by country, and regulated activities such as arranging investments may require authorisation. Appoint specialist legal, tax and financial advisers early, and ensure that any activity requiring FCA authorisation is carried out by an appropriately authorised firm. Build their review points into the playbook.

Karter McKinley supports mid-market corporate development teams through its M&A and Corporate Development service. We help write the programme charter and criteria, build and maintain the target pipeline, run the process and prepare the integration playbook. Where an activity is regulated, we work alongside appropriately authorised firms, and nothing here is investment, legal or tax advice.