In-House Legal , Legal Counsel

Legal Leadership Through a Merger or Acquisition

16 Oct, 20266 minutes

In this blog:: In House Insights

Legal Leadership Through a Merger or Acquisition: Decisions for Boards and Investors

When a business is bought, sold or merged, the General Counsel is usually one of the first people brought inside the deal. They run legal due diligence, manage disclosure, steer regulatory clearances, and often shape the integration plan. They are also, often, one of the people whose own role is in question once the deal completes.

That combination makes legal leadership one of the more delicate people decisions in any transaction. Decisions about finance or operational leadership are usually made early, as part of the deal thesis. Decisions about legal are frequently made later, and occasionally by default: someone leaves, and the structure forms around the gap.

What follows sets out the patterns I see most often in how in-house legal leadership changes through a transaction, and the decisions boards, acquirers and investors face along the way.

Why Legal Leadership Affects Deal Value

Much of an in-house legal function's value isn't written down. An experienced General Counsel knows why a key supply agreement was drafted the way it was, which disputes were settled and on what terms, and how a particular regulator prefers to be approached. They also know where the business's real risk appetite sits, as opposed to what the policy says. Due diligence captures the documents. It rarely captures the context around them.

That knowledge matters most in the months after completion, which is also when legal workload tends to peak. Contracts need reviewing for change of control provisions, consents and novations. Policies need harmonising, employment structures change, and the business is often renegotiating with customers and suppliers at the same time. Continuity in legal leadership through that period has a practical value that rarely appears in an integration plan.

Uncertainty carries its own cost. Where the future shape of the legal function stays open too long, the lawyers with the strongest market options are usually the first to explore them — and they're often the people integration depends on most.

How the Type of Deal Shapes What Legal Needs

The legal leadership question looks different depending on the shape of the transaction:

Acquisition Into a Larger Group

When a business is acquired by a group with an established legal function, the question is often whether it still needs its own General Counsel, or whether a divisional or business-unit counsel reporting into the Group General Counsel better reflects its new position. Where the acquired business operates in a distinct sector or regulatory environment, a senior legal lead on the ground usually remains essential. Where it's being folded closely into group operations, the role tends to narrow, and the incumbent ends up weighing a position that's similar in substance but different in title, autonomy and board access.

Merger of Equals

Two legal functions, two leaders and one combined structure. The appointment is usually one of the more sensitive decisions in the integration, partly because both General Counsel have usually been central to the deal itself. Seniority and tenure are rarely the deciding factors — the combined entity's regulatory footprint, its strategy and the culture it intends to build carry more weight. Below the top role, generalist positions are the most likely to be consolidated, while specialist gaps often become clearer once the two businesses are viewed together.

Private Equity Acquisition

Private equity ownership often keeps the existing management team in place, and the General Counsel is frequently retained. The role does change. Sponsors generally expect a lean, cost-aware legal function with regular investor reporting and involvement in financing and refinancing, and a legal house kept in order for an exit within a defined horizon — commonly three to five years. Some incumbents thrive on that brief. In other cases, the sponsor concludes within the first months of ownership that the business needs a General Counsel with prior private equity or exit experience, and a search follows.

Carve-Out or Spin-Off

A carve-out tends to create legal hiring need rather than reduce it. The divested business often has no legal function of its own, having relied on its former parent, and typically operates under a transitional services agreement that runs for a fixed period. Sequencing becomes the central question: whether to appoint a General Counsel first to design the function, or to secure commercial, employment and regulatory capability first to keep the business trading. Where assets and people transfer, TUPE adds a layer of employment work at exactly the point the function is being built.

Acquisition by an Overseas Group

When a UK business is acquired by an overseas group, its General Counsel often becomes the senior UK legal lead within a global function, reporting into a General Counsel in another jurisdiction. The role frequently becomes more important rather than less, as the acquirer depends on local knowledge of UK employment law, regulation and market practice, and on someone who can translate between head office expectations and how things work in the UK.

The Acquirer's Own Legal Team

Most discussion of M&A and legal leadership focuses on the target, yet the acquiring legal team often absorbs the heaviest change. The acquirer's General Counsel typically leads its side of the transaction, then takes on responsibility for integrating a second legal function — all while the day-to-day legal needs of the existing business continue.

This is a common point for acquirers to hire. Sometimes the need is short-term cover: an interim lawyer to keep business-as-usual work moving while senior team members are absorbed by the deal. Sometimes it's a dedicated integration lead. And often the deal itself exposes a gap that becomes permanent — a new jurisdiction, a regulated activity the acquirer hasn't carried on before, or a scale of business the existing team wasn't built for.

Planning for that capacity before signing tends to be easier than finding it after completion, when every part of the business is asking legal for something at once.

Deciding Who Leads the Combined Function

Where there are two credible candidates for the top legal role — or a sponsor or acquirer is assessing whether an incumbent is right for the next stage — the factors that matter most are:

fit with where the combined business is heading, rather than where either business has been
the regulatory profile of the combined entity, and which candidate has the most relevant experience of it
integration experience, given the workload ahead
the culture the combined legal function is intended to have, whether institutional, governance-led or commercially embedded

Some boards find it useful to benchmark internal candidates against the external market before deciding. It gives a clearer read on whether the strongest option is already in the business, and it gives the decision a firmer footing if it's later questioned.

How the decision is communicated matters almost as much as the decision itself. A General Counsel who isn't appointed may still be needed through integration, and a clearly defined transitional role with a known end point tends to keep that knowledge in the business longer than an open-ended arrangement does. Lawyers in that position generally respond better to clarity — even unwelcome clarity — than to a prolonged period of uncertainty.

Timing, Interim Cover and the Second Wave

Changes in legal leadership rarely happen all at once — they tend to follow the phases of the deal itself.

Before announcement: confidentiality means the General Counsel carries the deal largely alone or within a small group, with no prospect of backfill.

Signing to completion: this can run from a few weeks to well over a year where merger control or National Security and Investment Act review is involved. Retention arrangements typically hold key people in place, and demand for interim and contract lawyers rises.

The first 100 days after completion: leadership appointments are confirmed, duplicated roles become visible and integration work peaks.

Twelve to twenty-four months on: a second wave of movement, as retention periods end, the new structure settles and permanent hires are made to fill gaps the integration has revealed.

That second wave often receives less planning attention than the first. Retention arrangements are usually designed to carry the business through completion and early integration, and their end dates can cluster — so several departures may arrive within the same period.

Interim appointments can bridge these phases well, particularly while the permanent structure is still being settled. They work best with a defined scope and end point. Where an interim arrangement is extended repeatedly while the structure remains undecided, it can become a holding pattern that delays the permanent decision rather than supporting it.

Preparing the Legal Function Before a Sale

For businesses expecting to sell within the next few years, the legal function shapes the process before a buyer appears. A well-organised contract base, clear governance records and a General Counsel who has been through a diligence process before tend to make for a smoother sale, with fewer issues raised by a buyer's advisers. The same applies ahead of an IPO, where governance records, board minutes and related-party disclosures face even closer scrutiny from underwriters and regulators.

Succession and retention are also easier to address before a process than during one. A General Counsel who's uncertain about their position once a sale is in prospect may begin looking elsewhere — at exactly the point their knowledge is most needed. Boards that address this early — through retention arrangements, a clear view of the role after a sale, or a succession plan — tend to enter a process with fewer people risks attached.