Why shareholder activism is no longer a niche risk in the UK

Shareholder activism is no longer confined to distressed or underperforming businesses. Chambers’ research indicates that shareholder activism is on the rise and that all publicly listed companies are increasingly aware of the need for legal counsel.

Led by their general counsel (GC), boards must now focus on preparedness rather mere crisis response. Shareholder activism is now a predictable feature of UK capital markets, with activists targeting even high-performing companies when value creation narratives fall short. Elliot Management’s acquisition of 5% of BP’s shares, and Palliser’s influence over Rio Tinto are just two high-profile examples of this growing phenomenon.

- Partner at ranked firm

As we finalise our research for October’s Chambers UK 2027, our team is discovering that shareholder activism has broadened beyond distressed companies and turnaround situations.

Activists are now increasingly targeting well-capitalised, stable businesses. Even market leaders are proving vulnerable when suspected of strategic “underperformance”.

This change of focus aligns with broader shareholder activism trends. Activist funds are increasing sophisticated, with greater institutional investor alignment. Armed with detailed financial modelling alongside pre-planned legal strategies and increased voting power, GCs are now facing institutional-grade opponents.

The risk is no longer “can the activists make noise?” but “can they win shareholder support?”. Shareholder activism is a genuine governance and control risk, not just reputational pressure.

Even objectively strong companies can be targeted if investors believe more value can be unlocked. This has widened the range of targets for activism, including conglomerate discounts, underleveraged balance sheets, insufficient capital allocation and ESG or governance gaps.

But even as they mount challenges, activist shareholders increasingly position themselves as partners in value creation, rather than adversaries. This is why GCs must help their boards prepare for strategic challenge, not just legal attack.

Shareholder activism uses multiple tactics to try to force specific outcomes. Public campaigns like media and investor communications lay the groundwork for securing investor buy-in. This is typically accompanied by private engagement, pressuring individuals and stakeholders behind the scenes before the issue is escalated.

Activists will also use the formal tools open to them, such as requisitioning general meetings and making board representation demands. This may well escalate to all-out proxy fights as activists secure support from other investors to force their agenda. The use of shareholders’ rights frameworks underpins any litigation they go on to launch.

Most GCs will find that a law firm with takeover defence expertise can assist with countering these challenges. External counsel can advise on defence strategy, manage disclosure obligations and navigate relevant regulatory frameworks to protect the board’s interests.

Shareholder activism may not be obvious initially, but it should not catch you unaware either. PriceWaterhouseCoopers and Harvard Law identify some early indicators of potential problems including:

Detecting these trends means moving beyond passive monitoring to developing an early warning system to deliver a coherent strategic insight. This will involve greater attention to the shareholder register, engagement tracking and voting data. These insights can be strengthened using external advisers to benchmark sentiment and activist risk.

Early warning signals are not noise: they herald the first stage of the activist lifecycle. Recognising and acting on these signals allows GCs to turn shareholder activism from a crisis into a manageable governance process.

Preparedness for shareholder activism is now a board-level responsibility. Research published by Harvard Law School recommends an effective defence strategy to include:

Governance readiness. Conducting regular board and committee reviews to identify the early warning signs of potential activism.

Narrative control. Clearly and regularly articulating strategy and value creation inside and outside the business.

Stakeholder engagement. Operating a continuous investor communication programme to counter activist narratives.

Response planning. Defining pre-agreed response protocols when activism is identified.

Ultimately, effective shareholder activism defence depends on preparation long before any public campaign emerges. The GC plays a vital role, coordinating across the board, investor relations and external counsel.

As shareholder activism grows, our research is revealing that organisations are increasingly reliant on specialist legal counsel. In fact, forward-thinking businesses will engage specialist counsel before a dispute arises. In light of these developments, the in-house legal team shift from being firefighters to strategic risk advisers.

Activism is quickly becoming a predictable feature of British business and organisations needs to be prepared to head off the possibility of shareholder action. The GC plays a key role in moving activism from legal mandate to strategic necessity.

On a practical level, this begins by elevating activism to a standing board agenda item. Behind the scenes, the GC will integrate legal, reputational, and investor risks to provide effective guidance to the board. They will also work to align internal stakeholders early in preparation for any kind of activism.

The GC must demonstrate cross-functional leadership to unite multiple stakeholders effectively. The implementation of a data-informed strategy will provide evidence and guidance to assist with planning and decision making.

Chambers’ research show that shareholder activism has become normalised. Activists are using increasingly sophisticated strategies to force through their agendas.

For some, the question is no longer if a company will face activism, but when and how prepared it will be. For GCs, preparedness, insight, and expert legal guidance will define successful outcomes in this new environment.

Many law firms will not represent activists. Indeed, the majority of firms ranked in our Corporate/M&A rankings, for instance, will be more likely to advise on takeover defence. A small number of lawyers, though, have carved out a niche for themselves in representing activists and we think that the number of UK lawyers specialising in this is likely to increase. Our latest Activist Representation rankings can be found here.