Shareholder’s Impact on Deals

The UK M&A market is shifting.  A recent insight from Practical Law’s Public M&A: Trends and highlights from 2025 report highlights how investor behaviour is evolving, with shareholder engagement and activism playing a more visible role across UK transactions. For founders, management teams and boards alike, that shift has real implications.

Whether you are leading a growing SME, scaling with investment, or planning a longer-term exit, the way shareholder arrangements are structured today can directly affect how much control and flexibility you retain tomorrow.

An increased voice.

Historically, shareholder engagement intensified once a firm offer was on the table. Market commentary within the report points to a growing trend of shareholders influencing strategy and valuation discussions earlier, including situations where shareholders publicly opposed bids or encouraged alternative offers.

This is not limited to listed businesses. We are seeing similar dynamics across privately owned and owner-managed companies where external investors, minority shareholders or growth partners are increasingly active in shaping direction.

For founders and smaller businesses, this often shows up as earlier conversations about exit timing, valuation expectations and future strategy – sometimes years before any formal deal process begins.

For SMEs and growth-stage businesses, this does not always mean multiple bidders. More often, it means shareholders having a stronger voice in when and how a business considers strategic options, this often leads to:

• Increased pressure on leadership teams to justify strategy and valuation
• Greater visibility on competing offers
• Faster-moving deal timelines once interest emerges

Governance is no longer a back-office issue

Another recurring theme across recent transactions is that differing expectations between founders, investors and management teams often surface late in the process. Many challenges arise not because shareholders are involved, but because agreements were drafted at a different stage of the business and have not evolved alongside growth.

That can include:

• Voting thresholds that create uncertainty during negotiations
• Exit provisions that were never designed for scaling businesses
• Consent mechanisms that slow decision-making at critical moments

Strong shareholder agreements are not about limiting influence, they are about aligning expectations early so that when opportunities arise – whether investment, sale or restructuring – the business can move with clarity.

What founders, management teams and boards should be thinking about now

The rise in shareholder engagement does not mean businesses should avoid taking on investment or building partnership structures. Capital and strategic shareholders remain a key driver of growth across both mid-market and SME transactions.

In fact, the report notes that almost half of firm offers announced during 2025 were private equity or fund-backed, reinforcing the continued importance of investor participation in driving deal activity.

What has changed is the importance of forward planning.

Leadership teams should be asking:

• Do our shareholder arrangements reflect how decisions would actually be made during an exit or investment?
• Are expectations around control, valuation and timing aligned across shareholders?
• Would our current structure support growth – or create friction when opportunities arise?

These conversations are becoming more common across privately owned businesses as well as larger organisations, particularly where founders are balancing growth ambitions with long-term succession planning.

The commercial takeaway

More engaged shareholders are not a short-term trend. They reflect a broader shift in how ownership, governance and value creation are evolving across UK businesses.

For many companies, the difference between a smooth transaction and a difficult one comes down to preparation long before any deal is announced.

Clear, commercially balanced shareholder arrangements are increasingly becoming a strategic advantage rather than a legal formality.

How we help

As shareholder dynamics continue to shape transactions across both growing businesses and established organisations, many clients are revisiting how their shareholder arrangements and governance structures support long-term strategy. At Primas Law, we work closely with founders, investors and management teams to design practical, commercially balanced frameworks – from early-stage investment agreements through to exit planning and deal execution.

If you would like to discuss any of the themes raised in this article, please get in touch with the Primas Law Corporate team or visit our website.